release build is broken

g++ -c -include .pch/release-shared/Qt5Core -m32 -pipe -Werror -Wno-error=cpp -Wno-error=deprecated-declarations -Wno-error=strict-overflow -O2 -fvisibility=hidden -fvisibility-inlines-hidden -std=c+0x -Wall -W -D_REENTRANT -fPIC -DQT_NO_LIBUDEV -DQT_NO_USING_NAMESPACE -DQT_BUILD_CORE_LIB -DQT_BUILDING_QT -DQT_NO_CAST_TO_ASCII -DQT_ASCII_CAST_WARNINGS -DQT_MOC_COMPAT -DQT_USE_QSTRINGBUILDER -DQT_DEPRECATED_WARNINGS -DQT_DISABLE_DEPRECATED_BEFORE=0x050000 -DELF_INTERPRETER=\"/lib64/ld-linux-x86-64.so.2\" -DQT_USE_ICU -DPCRE_HAVE_CONFIG_H -DQT_CORE_LIB -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -DQT_NO_DEBUG -I../../mkspecs/linux-g+-32 -I. -I../../include -I../../include/QtCore -I../../include/QtCore/5.2.0 -I../../include/QtCore/5.2.0/QtCore -Iglobal -I../3rdparty/zlib -I../3rdparty/pcre -I../3rdparty/harfbuzz/src -I../3rdparty/md5 -I../3rdparty/md4 -I../3rdparty/sha3 -I.moc/release-shared -o .obj/release-shared/qsettings.o io/qsettings.cpp
io/qurlrecode.cpp: In function 'int recode(QString&, const ushort*, const ushort*, QUrl::ComponentFormattingOptions, const uchar*, bool)':
io/qurlrecode.cpp:415:24: error: 'action' may be used uninitialized in this function [-Werror=uninitialized]
cc1plus: all warnings being treated as errors
make[3]: *** [.obj/release-shared/qurlrecode.o] Error 1
make[3]: *** Waiting for unfinished jobs....