http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56705
Bug #: 56705
Summary: 4.8-20130319 misdiagnoses initialized var (regression
from 4.7.2)
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: egg...@gnu.org
Created attachment 29711
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29711
test program, abstracted from Emacs source code
This is GCC 4.8-20130319, x86-64, compiled on Fedora 17.
I ran into this problem when building a test version of Emacs.
Compiling the attached program with:
gcc -std=gnu99 -S -Wall -Werror -O3 t.i
yields the following diagnostic.
t.i: In function 'egetenv':
t.i:195:9: error: 'value' may be used uninitialized in this function
[-Werror=maybe-uninitialized]
char *value;
^
The diagnostic appears to be incorrect, as
there's no path through egetenv where 'value'
may be unused.
The diagnostic is not generated by GCC 4.7.2.
Removing the seemingly-unrelated function Fgetenv_internal
makes the diagnostic go away.
