diff --git a/src/plugins/cmakeprojectmanager/cmakeparser.cpp b/src/plugins/cmakeprojectmanager/cmakeparser.cpp
index 9242ee538bf..0aaa844623c 100644
--- a/src/plugins/cmakeprojectmanager/cmakeparser.cpp
+++ b/src/plugins/cmakeprojectmanager/cmakeparser.cpp
@@ -29,6 +29,8 @@
 
 #include "cmakeparser.h"
 
+#include <utils/qtcassert.h>
+
 #include <projectexplorer/gnumakeparser.h>
 #include <projectexplorer/projectexplorerconstants.h>
 
@@ -46,9 +48,11 @@ CMakeParser::CMakeParser() :
 {
     m_commonError.setPattern(QLatin1String(COMMON_ERROR_PATTERN));
     m_commonError.setMinimal(true);
+    QTC_CHECK(m_commonError.isValid());
 
     m_nextSubError.setPattern(QLatin1String(NEXT_SUBERROR_PATTERN));
     m_nextSubError.setMinimal(true);
+    QTC_CHECK(m_nextSubError.isValid());
     appendOutputParser(new GnuMakeParser());
 }
 
diff --git a/src/plugins/projectexplorer/gccparser.cpp b/src/plugins/projectexplorer/gccparser.cpp
index 1cd2b725c4d..613707e656e 100644
--- a/src/plugins/projectexplorer/gccparser.cpp
+++ b/src/plugins/projectexplorer/gccparser.cpp
@@ -32,6 +32,8 @@
 #include "task.h"
 #include "projectexplorerconstants.h"
 
+#include <utils/qtcassert.h>
+
 using namespace ProjectExplorer;
 
 // opt. drive letter + filename: (2 brackets)
@@ -44,10 +46,12 @@ GccParser::GccParser()
     m_regExp.setPattern(QLatin1Char('^') + QLatin1String(FILE_PATTERN)
                         + QLatin1String("(\\d+):(\\d+:)?\\s+((fatal |#)?(warning|error|note):?\\s)?([^\\s].+)$"));
     m_regExp.setMinimal(true);
+    QTC_CHECK(m_regExp.isValid());
 
     m_regExpIncluded.setPattern(QString::fromLatin1("\\bfrom\\s") + QLatin1String(FILE_PATTERN)
                                 + QLatin1String("(\\d+)(:\\d+)?[,:]?$"));
     m_regExpIncluded.setMinimal(true);
+    QTC_CHECK(m_regExpIncluded.isValid());
 
     // optional path with trailing slash
     // optional arm-linux-none-thingy
@@ -56,6 +60,7 @@ GccParser::GccParser()
     // optional .exe postfix
     m_regExpGccNames.setPattern(QLatin1String(COMMAND_PATTERN));
     m_regExpGccNames.setMinimal(true);
+    QTC_CHECK(m_regExpGccNames.isValid());
 
     appendOutputParser(new LdParser);
 }
diff --git a/src/plugins/projectexplorer/gnumakeparser.cpp b/src/plugins/projectexplorer/gnumakeparser.cpp
index e478255382a..a1d19cc64f2 100644
--- a/src/plugins/projectexplorer/gnumakeparser.cpp
+++ b/src/plugins/projectexplorer/gnumakeparser.cpp
@@ -32,6 +32,8 @@
 #include "projectexplorerconstants.h"
 #include "task.h"
 
+#include <utils/qtcassert.h>
+
 #include <QDir>
 #include <QFile>
 
@@ -50,10 +52,13 @@ GnuMakeParser::GnuMakeParser() :
     m_makeDir.setPattern(QLatin1String(MAKE_PATTERN) +
                          QLatin1String("(\\w+) directory .(.+).$"));
     m_makeDir.setMinimal(true);
+    QTC_CHECK(m_makeDir.isValid());
     m_makeLine.setPattern(QLatin1String(MAKE_PATTERN) + QLatin1String("(\\*\\*\\*\\s)?(.*)$"));
     m_makeLine.setMinimal(true);
+    QTC_CHECK(m_makeLine.isValid());
     m_makefileError.setPattern(QLatin1String("^(.*):(\\d+):\\s\\*\\*\\*\\s(.*)$"));
     m_makefileError.setMinimal(true);
+    QTC_CHECK(m_makefileError.isValid());
 }
 
 void GnuMakeParser::setWorkingDirectory(const QString &workingDirectory)
diff --git a/src/plugins/projectexplorer/ldparser.cpp b/src/plugins/projectexplorer/ldparser.cpp
index a555171524e..55f21eec076 100644
--- a/src/plugins/projectexplorer/ldparser.cpp
+++ b/src/plugins/projectexplorer/ldparser.cpp
@@ -31,6 +31,8 @@
 #include "projectexplorerconstants.h"
 #include "task.h"
 
+#include <utils/qtcassert.h>
+
 using namespace ProjectExplorer;
 
 namespace {
@@ -50,9 +52,11 @@ LdParser::LdParser()
                               QString::fromLatin1(FILE_PATTERN) + QLatin1String(")?(") +
                               QLatin1String(POSITION_PATTERN) + QLatin1String(")?\\s(.+)$"));
     m_regExpLinker.setMinimal(true);
+    QTC_CHECK(m_regExpLinker.isValid());
 
     m_regExpGccNames.setPattern(QLatin1String(COMMAND_PATTERN));
     m_regExpGccNames.setMinimal(true);
+    QTC_CHECK(m_regExpGccNames.isValid());
 }
 
 void LdParser::stdError(const QString &line)
diff --git a/src/plugins/projectexplorer/linuxiccparser.cpp b/src/plugins/projectexplorer/linuxiccparser.cpp
index bdd6f3ac1f6..901c3afe232 100644
--- a/src/plugins/projectexplorer/linuxiccparser.cpp
+++ b/src/plugins/projectexplorer/linuxiccparser.cpp
@@ -31,6 +31,8 @@
 #include "ldparser.h"
 #include "projectexplorerconstants.h"
 
+#include <utils/qtcassert.h>
+
 using namespace ProjectExplorer;
 
 LinuxIccParser::LinuxIccParser()
@@ -44,16 +46,19 @@ LinuxIccParser::LinuxIccParser()
                            " ((error|warning)( #\\d+)?: )?" // optional type (cap 4) and optional error number // TODO really optional ?
                            "(.*)$"));                       // description (cap 6)
     //m_firstLine.setMinimal(true);
+    QTC_CHECK(m_firstLine.isValid());
 
                                             // Note pattern also matches caret lines
     m_continuationLines.setPattern(QLatin1String("^\\s+"  // At least one whitespace
                                                  "(.*)$"));// description
     m_continuationLines.setMinimal(true);
+    QTC_CHECK(m_continuationLines.isValid());
 
     m_caretLine.setPattern(QLatin1String("^\\s*"          // Whitespaces
                                          "\\^"            // a caret
                                          "\\s*$"));       // and again whitespaces
     m_caretLine.setMinimal(true);
+    QTC_CHECK(m_caretLine.isValid());
 
     appendOutputParser(new LdParser);
 }
diff --git a/src/plugins/projectexplorer/msvcparser.cpp b/src/plugins/projectexplorer/msvcparser.cpp
index b3fa47cfd3c..56c4e4bc697 100644
--- a/src/plugins/projectexplorer/msvcparser.cpp
+++ b/src/plugins/projectexplorer/msvcparser.cpp
@@ -30,6 +30,7 @@
 #include "msvcparser.h"
 #include "projectexplorerconstants.h"
 
+#include <utils/qtcassert.h>
 #ifdef Q_OS_WIN
 #include <utils/winutils.h>
 #endif
@@ -74,8 +75,10 @@ MsvcParser::MsvcParser()
                                + QLatin1String("(Command line |fatal )?(warning|error) (")
                                + QLatin1String(ERROR_PATTERN) + QLatin1String(".*)$"));
     m_compileRegExp.setMinimal(true);
+    QTC_CHECK(m_compileRegExp.isValid());
     m_additionalInfoRegExp.setPattern(QString::fromLatin1("^        (.*)\\((\\d+)\\) : (.*)$"));
     m_additionalInfoRegExp.setMinimal(true);
+    QTC_CHECK(m_additionalInfoRegExp.isValid());
 }
 
 void MsvcParser::stdOutput(const QString &line)