From 3baf1520e314e149c74a5521d09f4be49aacf2b9 Mon Sep 17 00:00:00 2001
From: Arkadiusz Kondas <arkadiusz.kondas@gmail.com>
Date: Tue, 14 May 2019 22:43:08 +0200
Subject: [PATCH] Update dependencies and phpstan (#383)

---
 composer.lock                   | 343 +++++++++++++++++---------------
 src/Clustering/KMeans/Space.php |   4 +
 src/Dataset/FilesDataset.php    |  15 +-
 3 files changed, 196 insertions(+), 166 deletions(-)

diff --git a/composer.lock b/composer.lock
index e270c97..4eb374c 100644
--- a/composer.lock
+++ b/composer.lock
@@ -170,16 +170,16 @@
         },
         {
             "name": "doctrine/annotations",
-            "version": "v1.6.0",
+            "version": "v1.6.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/doctrine/annotations.git",
-                "reference": "c7f2050c68a9ab0bdb0f98567ec08d80ea7d24d5"
+                "reference": "53120e0eb10355388d6ccbe462f1fea34ddadb24"
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-                "reference": "c7f2050c68a9ab0bdb0f98567ec08d80ea7d24d5",
+                "url": "https://api.github.com/repos/doctrine/annotations/zipball/53120e0eb10355388d6ccbe462f1fea34ddadb24",
+                "reference": "53120e0eb10355388d6ccbe462f1fea34ddadb24",
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             },
             "require": {
@@ -234,7 +234,7 @@
                 "docblock",
                 "parser"
             ],
-            "time": "2017-12-06T07:11:42+00:00"
+            "time": "2019-03-25T19:12:02+00:00"
         },
         {
             "name": "doctrine/inflector",
@@ -415,16 +415,16 @@
         },
         {
             "name": "friendsofphp/php-cs-fixer",
-            "version": "v2.14.2",
+            "version": "v2.15.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/FriendsOfPHP/PHP-CS-Fixer.git",
-                "reference": "ff401e58261ffc5934a58f795b3f95b355e276cb"
+                "reference": "adfab51ae979ee8b0fcbc55aa231ec2786cb1f91"
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-                "reference": "ff401e58261ffc5934a58f795b3f95b355e276cb",
+                "url": "https://api.github.com/repos/FriendsOfPHP/PHP-CS-Fixer/zipball/adfab51ae979ee8b0fcbc55aa231ec2786cb1f91",
+                "reference": "adfab51ae979ee8b0fcbc55aa231ec2786cb1f91",
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@@ -452,10 +452,10 @@
                 "mikey179/vfsstream": "^1.6",
                 "php-coveralls/php-coveralls": "^2.1",
                 "php-cs-fixer/accessible-object": "^1.0",
-                "php-cs-fixer/phpunit-constraint-isidenticalstring": "^1.0.1",
-                "php-cs-fixer/phpunit-constraint-xmlmatchesxsd": "^1.0.1",
+                "php-cs-fixer/phpunit-constraint-isidenticalstring": "^1.1",
+                "php-cs-fixer/phpunit-constraint-xmlmatchesxsd": "^1.1",
                 "phpunit/phpunit": "^5.7.27 || ^6.5.8 || ^7.1",
-                "phpunitgoodpractices/traits": "^1.5.1",
+                "phpunitgoodpractices/traits": "^1.8",
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@@ -468,6 +468,11 @@
                 "php-cs-fixer"
             ],
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+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.15-dev"
+                }
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                 "psr-4": {
                     "PhpCsFixer\\": "src/"
@@ -499,20 +504,20 @@
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             ],
             "description": "A tool to automatically fix PHP code style",
-            "time": "2019-02-17T17:44:13+00:00"
+            "time": "2019-05-06T07:13:51+00:00"
         },
         {
             "name": "illuminate/contracts",
-            "version": "v5.8.4",
+            "version": "v5.8.17",
             "source": {
                 "type": "git",
                 "url": "https://github.com/illuminate/contracts.git",
-                "reference": "3e3a9a654adbf798e05491a5dbf90112df1effde"
+                "reference": "acd524087bcebcc0979748e84ccc0876395ae497"
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@@ -543,20 +548,20 @@
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             "homepage": "https://laravel.com",
-            "time": "2019-02-18T18:37:54+00:00"
+            "time": "2019-05-14T10:54:47+00:00"
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-            "version": "v5.8.4",
+            "version": "v5.8.17",
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-                "reference": "07062f5750872a31e086ff37a7c50ac18b8c417c"
+                "reference": "128c6aaa1599811a04fd10c2d68e1213e433da3f"
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@@ -604,7 +609,7 @@
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             "description": "The Illuminate Support package.",
             "homepage": "https://laravel.com",
-            "time": "2019-03-12T13:17:00+00:00"
+            "time": "2019-05-14T13:37:34+00:00"
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@@ -798,16 +803,16 @@
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-            "version": "1.8.1",
+            "version": "1.9.1",
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                 "url": "https://github.com/myclabs/DeepCopy.git",
-                "reference": "3e01bdad3e18354c3dce54466b7fbe33a9f9f7f8"
+                "reference": "e6828efaba2c9b79f4499dae1d66ef8bfa7b2b72"
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@@ -842,20 +847,20 @@
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-            "time": "2018-06-11T23:09:50+00:00"
+            "time": "2019-04-07T13:18:21+00:00"
         },
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-            "version": "2.16.0",
+            "version": "2.17.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/briannesbitt/Carbon.git",
-                "reference": "dd16fedc022180ea4292a03aabe95e9895677911"
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@@ -865,9 +870,9 @@
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-                "kylekatarnls/multi-tester": "^0.1",
+                "kylekatarnls/multi-tester": "^1.1",
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-                "phpstan/phpstan": "^0.10.8",
+                "phpstan/phpstan": "^0.11",
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@@ -902,7 +907,7 @@
                 "datetime",
                 "time"
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-            "time": "2019-03-12T09:31:40+00:00"
+            "time": "2019-04-27T18:04:27+00:00"
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@@ -1579,16 +1584,16 @@
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+            "version": "4.3.1",
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@@ -1626,7 +1631,7 @@
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             ],
             "description": "With this component, a library can provide support for annotations via DocBlocks or otherwise retrieve information that is embedded in a DocBlock.",
-            "time": "2017-11-30T07:14:17+00:00"
+            "time": "2019-04-30T17:48:53+00:00"
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@@ -1740,16 +1745,16 @@
         },
         {
             "name": "phpstan/phpstan-phpunit",
-            "version": "0.11",
+            "version": "0.11.1",
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                 "type": "git",
                 "url": "https://github.com/phpstan/phpstan-phpunit.git",
-                "reference": "70c22d44b96a21a4952fc13021a5a63cc83f5c81"
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@@ -1771,10 +1776,15 @@
                 "satooshi/php-coveralls": "^1.0",
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             },
-            "type": "library",
+            "type": "phpstan-extension",
             "extra": {
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+                },
+                "phpstan": {
+                    "includes": [
+                        "extension.neon"
+                    ]
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@@ -1787,20 +1797,20 @@
                 "MIT"
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-            "time": "2018-12-22T14:05:04+00:00"
+            "time": "2019-05-10T20:33:17+00:00"
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-            "version": "0.11.4",
+            "version": "0.11.6",
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                 "url": "https://github.com/phpstan/phpstan-shim.git",
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@@ -1808,7 +1818,7 @@
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@@ -1831,7 +1841,7 @@
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-            "time": "2019-03-14T15:24:47+00:00"
+            "time": "2019-05-08T19:07:51+00:00"
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@@ -2133,16 +2143,16 @@
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+            "version": "8.1.5",
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@@ -2185,7 +2195,7 @@
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@@ -2211,7 +2221,7 @@
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-            "time": "2019-03-16T07:33:46+00:00"
+            "time": "2019-05-14T04:57:31+00:00"
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@@ -2570,16 +2580,16 @@
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+            "version": "4.2.2",
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@@ -2594,7 +2604,7 @@
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@@ -2619,7 +2629,7 @@
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-            "time": "2019-02-01T05:27:49+00:00"
+            "time": "2019-05-05T09:05:15+00:00"
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@@ -3023,30 +3033,30 @@
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+            "version": "v1.19.0",
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-                "php": "^7.1"
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-                "phpstan/phpstan-phpunit": "^0.10",
+                "phpstan/phpstan": "^0.11",
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@@ -3066,7 +3076,7 @@
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@@ -3110,16 +3120,16 @@
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@@ -3157,20 +3167,20 @@
                 "phpcs",
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-            "time": "2019-03-19T03:22:27+00:00"
+            "time": "2019-04-10T23:49:02+00:00"
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@@ -3234,20 +3244,20 @@
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                 "psr6"
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-            "time": "2019-02-23T15:17:42+00:00"
+            "time": "2019-04-16T09:36:45+00:00"
         },
         {
             "name": "symfony/config",
-            "version": "v4.2.4",
+            "version": "v4.2.8",
             "source": {
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                 "url": "https://github.com/symfony/config.git",
-                "reference": "7f70d79c7a24a94f8e98abb988049403a53d7b31"
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-                "reference": "7f70d79c7a24a94f8e98abb988049403a53d7b31",
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             "require": {
@@ -3297,20 +3307,20 @@
             ],
             "description": "Symfony Config Component",
             "homepage": "https://symfony.com",
-            "time": "2019-02-23T15:17:42+00:00"
+            "time": "2019-04-01T14:03:25+00:00"
         },
         {
             "name": "symfony/console",
-            "version": "v4.2.4",
+            "version": "v4.2.8",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/console.git",
-                "reference": "9dc2299a016497f9ee620be94524e6c0af0280a9"
+                "reference": "e2840bb38bddad7a0feaf85931e38fdcffdb2f81"
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-                "url": "https://api.github.com/repos/symfony/console/zipball/9dc2299a016497f9ee620be94524e6c0af0280a9",
-                "reference": "9dc2299a016497f9ee620be94524e6c0af0280a9",
+                "url": "https://api.github.com/repos/symfony/console/zipball/e2840bb38bddad7a0feaf85931e38fdcffdb2f81",
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             "require": {
@@ -3369,20 +3379,20 @@
             ],
             "description": "Symfony Console Component",
             "homepage": "https://symfony.com",
-            "time": "2019-02-23T15:17:42+00:00"
+            "time": "2019-04-08T14:23:48+00:00"
         },
         {
             "name": "symfony/contracts",
-            "version": "v1.0.2",
+            "version": "v1.1.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/contracts.git",
-                "reference": "1aa7ab2429c3d594dd70689604b5cf7421254cdf"
+                "reference": "d3636025e8253c6144358ec0a62773cae588395b"
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-                "url": "https://api.github.com/repos/symfony/contracts/zipball/1aa7ab2429c3d594dd70689604b5cf7421254cdf",
-                "reference": "1aa7ab2429c3d594dd70689604b5cf7421254cdf",
+                "url": "https://api.github.com/repos/symfony/contracts/zipball/d3636025e8253c6144358ec0a62773cae588395b",
+                "reference": "d3636025e8253c6144358ec0a62773cae588395b",
                 "shasum": ""
             },
             "require": {
@@ -3390,19 +3400,22 @@
             },
             "require-dev": {
                 "psr/cache": "^1.0",
-                "psr/container": "^1.0"
+                "psr/container": "^1.0",
+                "symfony/polyfill-intl-idn": "^1.10"
             },
             "suggest": {
                 "psr/cache": "When using the Cache contracts",
                 "psr/container": "When using the Service contracts",
                 "symfony/cache-contracts-implementation": "",
+                "symfony/event-dispatcher-implementation": "",
+                "symfony/http-client-contracts-implementation": "",
                 "symfony/service-contracts-implementation": "",
                 "symfony/translation-contracts-implementation": ""
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.0-dev"
+                    "dev-master": "1.1-dev"
                 }
             },
             "autoload": {
@@ -3437,20 +3450,20 @@
                 "interoperability",
                 "standards"
             ],
-            "time": "2018-12-05T08:06:11+00:00"
+            "time": "2019-04-27T14:29:50+00:00"
         },
         {
             "name": "symfony/debug",
-            "version": "v4.2.4",
+            "version": "v4.2.8",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/debug.git",
-                "reference": "de73f48977b8eaf7ce22814d66e43a1662cc864f"
+                "reference": "2d279b6bb1d582dd5740d4d3251ae8c18812ed37"
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-                "url": "https://api.github.com/repos/symfony/debug/zipball/de73f48977b8eaf7ce22814d66e43a1662cc864f",
-                "reference": "de73f48977b8eaf7ce22814d66e43a1662cc864f",
+                "url": "https://api.github.com/repos/symfony/debug/zipball/2d279b6bb1d582dd5740d4d3251ae8c18812ed37",
+                "reference": "2d279b6bb1d582dd5740d4d3251ae8c18812ed37",
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             },
             "require": {
@@ -3493,20 +3506,20 @@
             ],
             "description": "Symfony Debug Component",
             "homepage": "https://symfony.com",
-            "time": "2019-03-03T18:11:24+00:00"
+            "time": "2019-04-11T11:27:41+00:00"
         },
         {
             "name": "symfony/dependency-injection",
-            "version": "v4.2.4",
+            "version": "v4.2.8",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/dependency-injection.git",
-                "reference": "cdadb3765df7c89ac93628743913b92bb91f1704"
+                "reference": "d161c0c8bc77ad6fdb8f5083b9e34c3015d43eb1"
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             "dist": {
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-                "url": "https://api.github.com/repos/symfony/dependency-injection/zipball/cdadb3765df7c89ac93628743913b92bb91f1704",
-                "reference": "cdadb3765df7c89ac93628743913b92bb91f1704",
+                "url": "https://api.github.com/repos/symfony/dependency-injection/zipball/d161c0c8bc77ad6fdb8f5083b9e34c3015d43eb1",
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             "require": {
@@ -3566,20 +3579,20 @@
             ],
             "description": "Symfony DependencyInjection Component",
             "homepage": "https://symfony.com",
-            "time": "2019-02-23T15:17:42+00:00"
+            "time": "2019-04-27T11:48:17+00:00"
         },
         {
             "name": "symfony/event-dispatcher",
-            "version": "v4.2.4",
+            "version": "v4.2.8",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/event-dispatcher.git",
-                "reference": "3354d2e6af986dd71f68b4e5cf4a933ab58697fb"
+                "reference": "fbce53cd74ac509cbe74b6f227622650ab759b02"
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-                "url": "https://api.github.com/repos/symfony/event-dispatcher/zipball/3354d2e6af986dd71f68b4e5cf4a933ab58697fb",
-                "reference": "3354d2e6af986dd71f68b4e5cf4a933ab58697fb",
+                "url": "https://api.github.com/repos/symfony/event-dispatcher/zipball/fbce53cd74ac509cbe74b6f227622650ab759b02",
+                "reference": "fbce53cd74ac509cbe74b6f227622650ab759b02",
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             "require": {
@@ -3630,11 +3643,11 @@
             ],
             "description": "Symfony EventDispatcher Component",
             "homepage": "https://symfony.com",
-            "time": "2019-02-23T15:17:42+00:00"
+            "time": "2019-04-06T13:51:08+00:00"
         },
         {
             "name": "symfony/filesystem",
-            "version": "v4.2.4",
+            "version": "v4.2.8",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/filesystem.git",
@@ -3684,16 +3697,16 @@
         },
         {
             "name": "symfony/finder",
-            "version": "v4.2.4",
+            "version": "v4.2.8",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/finder.git",
-                "reference": "267b7002c1b70ea80db0833c3afe05f0fbde580a"
+                "reference": "e45135658bd6c14b61850bf131c4f09a55133f69"
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             "dist": {
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-                "url": "https://api.github.com/repos/symfony/finder/zipball/267b7002c1b70ea80db0833c3afe05f0fbde580a",
-                "reference": "267b7002c1b70ea80db0833c3afe05f0fbde580a",
+                "url": "https://api.github.com/repos/symfony/finder/zipball/e45135658bd6c14b61850bf131c4f09a55133f69",
+                "reference": "e45135658bd6c14b61850bf131c4f09a55133f69",
                 "shasum": ""
             },
             "require": {
@@ -3729,20 +3742,20 @@
             ],
             "description": "Symfony Finder Component",
             "homepage": "https://symfony.com",
-            "time": "2019-02-23T15:42:05+00:00"
+            "time": "2019-04-06T13:51:08+00:00"
         },
         {
             "name": "symfony/http-foundation",
-            "version": "v4.2.4",
+            "version": "v4.2.8",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/http-foundation.git",
-                "reference": "850a667d6254ccf6c61d853407b16f21c4579c77"
+                "reference": "1ea878bd3af18f934dedb8c0de60656a9a31a718"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/http-foundation/zipball/850a667d6254ccf6c61d853407b16f21c4579c77",
-                "reference": "850a667d6254ccf6c61d853407b16f21c4579c77",
+                "url": "https://api.github.com/repos/symfony/http-foundation/zipball/1ea878bd3af18f934dedb8c0de60656a9a31a718",
+                "reference": "1ea878bd3af18f934dedb8c0de60656a9a31a718",
                 "shasum": ""
             },
             "require": {
@@ -3783,20 +3796,20 @@
             ],
             "description": "Symfony HttpFoundation Component",
             "homepage": "https://symfony.com",
-            "time": "2019-02-26T08:03:39+00:00"
+            "time": "2019-05-01T08:36:31+00:00"
         },
         {
             "name": "symfony/http-kernel",
-            "version": "v4.2.4",
+            "version": "v4.2.8",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/http-kernel.git",
-                "reference": "895ceccaa8149f9343e6134e607c21da42d73b7a"
+                "reference": "a7713bc522f1a1cdf0b39f809fa4542523fc3114"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/http-kernel/zipball/895ceccaa8149f9343e6134e607c21da42d73b7a",
-                "reference": "895ceccaa8149f9343e6134e607c21da42d73b7a",
+                "url": "https://api.github.com/repos/symfony/http-kernel/zipball/a7713bc522f1a1cdf0b39f809fa4542523fc3114",
+                "reference": "a7713bc522f1a1cdf0b39f809fa4542523fc3114",
                 "shasum": ""
             },
             "require": {
@@ -3872,20 +3885,20 @@
             ],
             "description": "Symfony HttpKernel Component",
             "homepage": "https://symfony.com",
-            "time": "2019-03-03T19:38:09+00:00"
+            "time": "2019-05-01T13:31:08+00:00"
         },
         {
             "name": "symfony/options-resolver",
-            "version": "v4.2.4",
+            "version": "v4.2.8",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/options-resolver.git",
-                "reference": "3896e5a7d06fd15fa4947694c8dcdd371ff147d1"
+                "reference": "fd4a5f27b7cd085b489247b9890ebca9f3e10044"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/options-resolver/zipball/3896e5a7d06fd15fa4947694c8dcdd371ff147d1",
-                "reference": "3896e5a7d06fd15fa4947694c8dcdd371ff147d1",
+                "url": "https://api.github.com/repos/symfony/options-resolver/zipball/fd4a5f27b7cd085b489247b9890ebca9f3e10044",
+                "reference": "fd4a5f27b7cd085b489247b9890ebca9f3e10044",
                 "shasum": ""
             },
             "require": {
@@ -3926,7 +3939,7 @@
                 "configuration",
                 "options"
             ],
-            "time": "2019-02-23T15:17:42+00:00"
+            "time": "2019-04-10T16:20:36+00:00"
         },
         {
             "name": "symfony/polyfill-ctype",
@@ -4161,16 +4174,16 @@
         },
         {
             "name": "symfony/process",
-            "version": "v4.2.4",
+            "version": "v4.2.8",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/process.git",
-                "reference": "6c05edb11fbeff9e2b324b4270ecb17911a8b7ad"
+                "reference": "8cf39fb4ccff793340c258ee7760fd40bfe745fe"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/process/zipball/6c05edb11fbeff9e2b324b4270ecb17911a8b7ad",
-                "reference": "6c05edb11fbeff9e2b324b4270ecb17911a8b7ad",
+                "url": "https://api.github.com/repos/symfony/process/zipball/8cf39fb4ccff793340c258ee7760fd40bfe745fe",
+                "reference": "8cf39fb4ccff793340c258ee7760fd40bfe745fe",
                 "shasum": ""
             },
             "require": {
@@ -4206,11 +4219,11 @@
             ],
             "description": "Symfony Process Component",
             "homepage": "https://symfony.com",
-            "time": "2019-01-24T22:05:03+00:00"
+            "time": "2019-04-10T16:20:36+00:00"
         },
         {
             "name": "symfony/stopwatch",
-            "version": "v4.2.4",
+            "version": "v4.2.8",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/stopwatch.git",
@@ -4260,16 +4273,16 @@
         },
         {
             "name": "symfony/translation",
-            "version": "v4.2.4",
+            "version": "v4.2.8",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/translation.git",
-                "reference": "748464177a77011f8f4cdd076773862ce4915f8f"
+                "reference": "181a426dd129cb496f12d7e7555f6d0b37a7615b"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/translation/zipball/748464177a77011f8f4cdd076773862ce4915f8f",
-                "reference": "748464177a77011f8f4cdd076773862ce4915f8f",
+                "url": "https://api.github.com/repos/symfony/translation/zipball/181a426dd129cb496f12d7e7555f6d0b37a7615b",
+                "reference": "181a426dd129cb496f12d7e7555f6d0b37a7615b",
                 "shasum": ""
             },
             "require": {
@@ -4291,7 +4304,9 @@
                 "symfony/console": "~3.4|~4.0",
                 "symfony/dependency-injection": "~3.4|~4.0",
                 "symfony/finder": "~2.8|~3.0|~4.0",
+                "symfony/http-kernel": "~3.4|~4.0",
                 "symfony/intl": "~3.4|~4.0",
+                "symfony/var-dumper": "~3.4|~4.0",
                 "symfony/yaml": "~3.4|~4.0"
             },
             "suggest": {
@@ -4329,20 +4344,20 @@
             ],
             "description": "Symfony Translation Component",
             "homepage": "https://symfony.com",
-            "time": "2019-02-27T03:31:50+00:00"
+            "time": "2019-05-01T12:55:36+00:00"
         },
         {
             "name": "symfony/var-exporter",
-            "version": "v4.2.4",
+            "version": "v4.2.8",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/var-exporter.git",
-                "reference": "d8bf4424c232b55f4c1816037d3077a89258557e"
+                "reference": "57e00f3e0a3deee65b67cf971455b98afeacca46"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/var-exporter/zipball/d8bf4424c232b55f4c1816037d3077a89258557e",
-                "reference": "d8bf4424c232b55f4c1816037d3077a89258557e",
+                "url": "https://api.github.com/repos/symfony/var-exporter/zipball/57e00f3e0a3deee65b67cf971455b98afeacca46",
+                "reference": "57e00f3e0a3deee65b67cf971455b98afeacca46",
                 "shasum": ""
             },
             "require": {
@@ -4389,20 +4404,20 @@
                 "instantiate",
                 "serialize"
             ],
-            "time": "2019-01-16T20:35:37+00:00"
+            "time": "2019-04-09T20:09:28+00:00"
         },
         {
             "name": "symfony/yaml",
-            "version": "v4.2.4",
+            "version": "v4.2.8",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/yaml.git",
-                "reference": "761fa560a937fd7686e5274ff89dcfa87a5047df"
+                "reference": "6712daf03ee25b53abb14e7e8e0ede1a770efdb1"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/yaml/zipball/761fa560a937fd7686e5274ff89dcfa87a5047df",
-                "reference": "761fa560a937fd7686e5274ff89dcfa87a5047df",
+                "url": "https://api.github.com/repos/symfony/yaml/zipball/6712daf03ee25b53abb14e7e8e0ede1a770efdb1",
+                "reference": "6712daf03ee25b53abb14e7e8e0ede1a770efdb1",
                 "shasum": ""
             },
             "require": {
@@ -4448,7 +4463,7 @@
             ],
             "description": "Symfony Yaml Component",
             "homepage": "https://symfony.com",
-            "time": "2019-02-23T15:17:42+00:00"
+            "time": "2019-03-30T15:58:42+00:00"
         },
         {
             "name": "symplify/better-phpdoc-parser",
@@ -4654,16 +4669,16 @@
         },
         {
             "name": "theseer/tokenizer",
-            "version": "1.1.0",
+            "version": "1.1.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/theseer/tokenizer.git",
-                "reference": "cb2f008f3f05af2893a87208fe6a6c4985483f8b"
+                "reference": "1c42705be2b6c1de5904f8afacef5895cab44bf8"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/theseer/tokenizer/zipball/cb2f008f3f05af2893a87208fe6a6c4985483f8b",
-                "reference": "cb2f008f3f05af2893a87208fe6a6c4985483f8b",
+                "url": "https://api.github.com/repos/theseer/tokenizer/zipball/1c42705be2b6c1de5904f8afacef5895cab44bf8",
+                "reference": "1c42705be2b6c1de5904f8afacef5895cab44bf8",
                 "shasum": ""
             },
             "require": {
@@ -4690,7 +4705,7 @@
                 }
             ],
             "description": "A small library for converting tokenized PHP source code into XML and potentially other formats",
-            "time": "2017-04-07T12:08:54+00:00"
+            "time": "2019-04-04T09:56:43+00:00"
         },
         {
             "name": "webmozart/assert",
diff --git a/src/Clustering/KMeans/Space.php b/src/Clustering/KMeans/Space.php
index f9f57f5..3346315 100644
--- a/src/Clustering/KMeans/Space.php
+++ b/src/Clustering/KMeans/Space.php
@@ -167,6 +167,10 @@ class Space extends SplObjectStorage
             foreach ($cluster as $point) {
                 $closest = $point->getClosest($clusters);
 
+                if ($closest === null) {
+                    continue;
+                }
+
                 if ($closest !== $cluster) {
                     $attach[$closest] ?? $attach[$closest] = new SplObjectStorage();
                     $detach[$cluster] ?? $detach[$cluster] = new SplObjectStorage();
diff --git a/src/Dataset/FilesDataset.php b/src/Dataset/FilesDataset.php
index daa7192..e24d908 100644
--- a/src/Dataset/FilesDataset.php
+++ b/src/Dataset/FilesDataset.php
@@ -19,7 +19,13 @@ class FilesDataset extends ArrayDataset
 
     private function scanRootPath(string $rootPath): void
     {
-        foreach (glob($rootPath.DIRECTORY_SEPARATOR.'*', GLOB_ONLYDIR) as $dir) {
+        $dirs = glob($rootPath.DIRECTORY_SEPARATOR.'*', GLOB_ONLYDIR);
+
+        if ($dirs === false) {
+            throw new DatasetException(sprintf('An error occurred during directory "%s" scan', $rootPath));
+        }
+
+        foreach ($dirs as $dir) {
             $this->scanDir($dir);
         }
     }
@@ -28,7 +34,12 @@ class FilesDataset extends ArrayDataset
     {
         $target = basename($dir);
 
-        foreach (array_filter(glob($dir.DIRECTORY_SEPARATOR.'*'), 'is_file') as $file) {
+        $files = glob($dir.DIRECTORY_SEPARATOR.'*');
+        if ($files === false) {
+            return;
+        }
+
+        foreach (array_filter($files, 'is_file') as $file) {
             $this->samples[] = file_get_contents($file);
             $this->targets[] = $target;
         }