Similar bug is also reported in 20624 and 20681.
But here I give a much simpler test case.
Compile with -Wall.
Problem exists in 4.1 from CVS too (detailed below).
---- test case begin ----
struct A { A(); ~A(); };
int *f(char const *p)
{
A a;
if (p[0]=='_' && p[1]=='_')
return new int;
else
return 0;
}
---- test case end ----
# error message:
$ g++ -c -Wall w.cxx
w.cxx: In function ‘B* f(const char*)’:
w.cxx:10: warning: control reaches end of non-void function
# 4.0 version:
$ g++ -v
Using built-in specs.
Target: i686-pc-linux-gnu
Configured with: ../gcc/configure --prefix=/lvm/fred/gcc/4.0/install-20050409
--enable-static --enable-shared --enable-languages=c,c++,f95
--with-mpfr=/lvm/fred/pkg/gmp/install
Thread model: posix
gcc version 4.0.0 20050409 (prerelease)
# 4.1 version:
$ g++ -v
Using built-in specs.
Target: i686-pc-linux-gnu
Configured with: ../gcc/configure --prefix=/lvm/fred/gcc/cvs/install-20050305
--enable-static --enable-shared --enable-languages=c,c++,f95
--with-mpfr=/lvm/fred/pkg/gmp/install
Thread model: posix
gcc version 4.1.0 20050305 (experimental)
--
Summary: unwarranted warning "control reaches end of non-void-
function"
Product: gcc
Version: 4.0.0
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: fsm at robots dot ox dot ac dot uk
CC: gcc-bugs at gcc dot gnu dot org
GCC build triplet: i686-pc-linux-gnu
GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20918
