With the attached code I get C:\Dev-Cpp\Projects\test-stlport\main_19.cpp In function `void test_19(long unsigned int)': 8 C:\Dev-Cpp\Projects\test-stlport\main_19.cpp [Warning] will never be executed 8 C:\Dev-Cpp\Projects\test-stlport\main_19.cpp [Warning] will never be executed
and when I uncomment the "i = 1" I get C:\Dev-Cpp\Projects\test-stlport\main_19.cpp In function `void test_19(long unsigned int)': 10 C:\Dev-Cpp\Projects\test-stlport\main_19.cpp [Warning] will never be executed void test_19(unsigned long ul_reason_for_call) { int i = 0; switch (ul_reason_for_call) { case 1: //i = 1; break; case 2: break; case 3: break; case 4: break; } } Happend when compiled C and C++. C:\MinGW_3.4.4\bin>gcc -v Reading specs from ../lib/gcc/mingw32/3.4.4/specs Configured with: ../gcc/configure --with-gcc --with-gnu-ld --with-gnu-as --host= mingw32 --target=mingw32 --prefix=/mingw --enable-threads --disable-nls --enable -languages=c,c++,f77,ada,objc,java --disable-win32-registry --disable-shared --e nable-sjlj-exceptions --enable-libgcj --disable-java-awt --without-x --enable-ja va-gc=boehm --disable-libgcj-debug --enable-interpreter --enable-hash-synchroniz ation --enable-libstdcxx-debug Thread model: win32 gcc version 3.4.4 (mingw special) -- Summary: another wrong "will never be executed" warning with switch - case Product: gcc Version: 3.4.4 Status: UNCONFIRMED Severity: normal Priority: P3 Component: middle-end AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: oliverst at online dot de http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25184