[Bug c++/25181] New: wrong "will never be executed" warning in switch - case block
oliverst at online dot de
gcc-bugzilla@gcc.gnu.org
Wed Nov 30 15:52:00 GMT 2005
The following code will report this:
C:\Dev-Cpp\Projects\test-stlport\main_18.cpp In function `int test_18()':
13 C:\Dev-Cpp\Projects\test-stlport\main_18.cpp [Warning] will never be
executed
extern int abort();
int test_18()
{
int type;
switch (type)
{
case 1:
int ret = abort();
if (ret != 0)
return 2;
break;
case 3:
break;
default:
return 1;
}
return 0;
}
If you remove "case 3" or "default" the warning will go away.
I already reported something similar under bug 24968.
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: wrong "will never be executed" warning in switch - case
block
Product: gcc
Version: 3.4.4
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: oliverst at online dot de
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25181
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