[Reflection] Avoid error Call to a member function getType() on null on ReflectionResolver (#334)

rules-tests/Php71/Rector/FuncCall/RemoveExtraParametersRector/Fixture/on_cannot_get_scope_of_function_call.php.inc

@@ -0,0 +1,39 @@
+<?php
+
+namespace Rector\Tests\Php71\Rector\FuncCall\RemoveExtraParametersRector\Fixture;
+
+final class OnCannotGetScopeOfFunctionCall
+{
+    public static function streamSupports(string $function, $ret, $resource): bool
+    {
+        define('ENVIRONMENT', 'testing');
+
+        if (ENVIRONMENT === 'testing') {
+            return false;
+        }
+
+        return function_exists($function, 'abc') && @$function($resource);
+    }
+}
+
+?>
+-----
+<?php
+
+namespace Rector\Tests\Php71\Rector\FuncCall\RemoveExtraParametersRector\Fixture;
+
+final class OnCannotGetScopeOfFunctionCall
+{
+    public static function streamSupports(string $function, $ret, $resource): bool
+    {
+        define('ENVIRONMENT', 'testing');
+
+        if (ENVIRONMENT === 'testing') {
+            return false;
+        }
+
+        return function_exists($function) && @$function($resource);
+    }
+}
+
+?>

src/Reflection/ReflectionResolver.php

@@ -204,6 +204,10 @@ final class ReflectionResolver
             return null;
         }
 
+        if (! $scope instanceof Scope) {
+            return null;
+        }
+
         // fallback to callable
         $funcCallNameType = $scope->getType($funcCall->name);
         return $this->typeToCallReflectionResolverRegistry->resolve($funcCallNameType, $scope);