diff --git a/libqpdf/QPDFObjectHandle.cc b/libqpdf/QPDFObjectHandle.cc
index 9a1aae4a..442678fd 100644
--- a/libqpdf/QPDFObjectHandle.cc
+++ b/libqpdf/QPDFObjectHandle.cc
@@ -35,6 +35,7 @@ QPDFObjectHandle::ParserCallbacks::terminateParsing()
 
 QPDFObjectHandle::QPDFObjectHandle() :
     initialized(false),
+    qpdf(0),
     objid(0),
     generation(0),
     reserved(false)
diff --git a/libqpdf/QPDFWriter.cc b/libqpdf/QPDFWriter.cc
index 8d169f3b..499129b1 100644
--- a/libqpdf/QPDFWriter.cc
+++ b/libqpdf/QPDFWriter.cc
@@ -70,6 +70,7 @@ QPDFWriter::init()
     encryption_V = 0;
     encryption_R = 0;
     encryption_dict_objid = 0;
+    pipeline = 0;
     next_objid = 1;
     cur_stream_length_id = 0;
     cur_stream_length = 0;
@@ -2695,7 +2696,7 @@ QPDFWriter::writeLinearized()
 
     this->next_objid = part4_first_obj;
     enqueuePart(part4);
-    assert(this->next_objid = after_part4);
+    assert(this->next_objid == after_part4);
     this->next_objid = part6_first_obj;
     enqueuePart(part6);
     assert(this->next_objid == after_part6);
diff --git a/libtests/flate.cc b/libtests/flate.cc
index a6d4eeb6..3da056ed 100644
--- a/libtests/flate.cc
+++ b/libtests/flate.cc
@@ -46,6 +46,7 @@ void run(char const* filename)
 	// Write to the both pipeline
 	def3->write(buf, len);
     }
+    fclose(in1);
 
     def1->finish();
     delete def1;
@@ -69,6 +70,7 @@ void run(char const* filename)
     {
 	inf2->write(buf, len);
     }
+    fclose(in2);
 
     inf2->finish();
     delete inf2;