https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102539
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |INVALID
CC| |msebor at gcc dot gnu.org
Status|NEW |RESOLVED
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
-Wmaybe-uninitialized was enhanced to warn when a pointer to uninitialized
memory is passed to a function taking a const-qualified pointer:
... In addition, passing a pointer (or in C++, a reference) to an
uninitialized object to a const-qualified function argument is also diagnosed
by this warning.
That's also what seems to happen in the test case. I get slightly different
output but the essence of the warning seems the same:
$ gcc -O2 -S -Wall -fdump-tree-uninit -fno-strict-aliasing pr102539.c
fabric/clustering.c: In function ‘msg_succession_list_field_set.constprop’:
fabric/clustering.c:3750:2: warning: ‘<unknown>’ may be used uninitialized
[-Wmaybe-uninitialized]
In file included from fabric/clustering.c:36:
/home/slyfox/dev/git/nixpkgs/source/cf/include/msg.h:195:6: note: by argument 3
of type ‘const uint8_t *’ {aka ‘const unsigned char *’} to ‘msg_set_buf’
declared here
tmp$ /build/gcc-master/gcc/xgcc -B /build/gcc-master/gcc -O2 -S -Wall
-fdump-tree-uninit -fno-strict-aliasing -std=gnu99 pr102539.c
fabric/clustering.c: In function ‘msg_succession_list_field_set.constprop’:
fabric/clustering.c:3750:2: warning: ‘<unknown>’ may be used uninitialized
[-Wmaybe-uninitialized]
In file included from fabric/clustering.c:36:
/home/slyfox/dev/git/nixpkgs/source/cf/include/msg.h:195:6: note: by argument 3
of type ‘const uint8_t *’ {aka ‘const unsigned char *’} to ‘msg_set_buf’
declared here
The <unknown> is a known cosmetic flaw with some middle end warnings. It
should be fixed but we don't need to keep track of it here.
