[Bug c/59871] [4.7/4.8/4.9 Regression] No unused value warning for comma expression

jakub at gcc dot gnu.org gcc-bugzilla@gcc.gnu.org
Sat Jan 18 10:03:00 GMT 2014


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59871

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|No unused value warning for |[4.7/4.8/4.9 Regression] No
                   |comma expression            |unused value warning for
                   |                            |comma expression

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Even 3.4.x gave:
pr59871.c:6: warning: left-hand operand of comma expression has no effect
pr59871.c:7: warning: left-hand operand of comma expression has no effect
pr59871.c:8: warning: left-hand operand of comma expression has no effect
pr59871.c:10: warning: left-hand operand of comma expression has no effect
pr59871.c:8: warning: value computed is not used
pr59871.c:10: warning: value computed is not used
so this seems to have regressed in 4.0.



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