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* [Bug c++/47864] New: incorrect control reaches end of non-void function (switch+break+default)
@ 2011-02-23 22:09 ami at fischman dot org
2011-02-23 22:32 ` [Bug c++/47864] " pinskia at gcc dot gnu.org
0 siblings, 1 reply; 2+ messages in thread
From: ami at fischman dot org @ 2011-02-23 22:09 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47864
Summary: incorrect control reaches end of non-void function
(switch+break+default)
Product: gcc
Version: 4.4.3
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: ami@fischman.org
Using -finstrument-functions together with a switch statement containing a
"break;" can result in incorrect warning about reaching the end of a non-void
function, even when the "break;" is a no-op (because it follows an
unconditional return statement).
$ nl t.cc ; g++ -finstrument-functions -Wreturn-type -Werror -c t.cc
1 int foo(int type) {
2 switch(type) {
3 case 0: return 1; break;
4 default: return 0;
5 }
6 }
cc1plus: warnings being treated as errors
t.cc: In function ‘int foo(int)’:
t.cc:6: error: control reaches end of non-void function
This is with:
$ gcc --version
gcc (Ubuntu 4.4.3-4ubuntu5) 4.4.3
Doing either of:
- remove the "break;"
- build without -finstrument-functions
makes gcc stop emitting the incorrect warning.
^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug c++/47864] incorrect control reaches end of non-void function (switch+break+default)
2011-02-23 22:09 [Bug c++/47864] New: incorrect control reaches end of non-void function (switch+break+default) ami at fischman dot org
@ 2011-02-23 22:32 ` pinskia at gcc dot gnu.org
0 siblings, 0 replies; 2+ messages in thread
From: pinskia at gcc dot gnu.org @ 2011-02-23 22:32 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47864
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution| |DUPLICATE
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> 2011-02-23 22:08:42 UTC ---
This is exactly the same issue as PR 20681. The issue is that is try finally
block which will produce a fallthrough which is not needed.
*** This bug has been marked as a duplicate of bug 20681 ***
^ permalink raw reply [flat|nested] 2+ messages in thread
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2011-02-23 22:09 [Bug c++/47864] New: incorrect control reaches end of non-void function (switch+break+default) ami at fischman dot org
2011-02-23 22:32 ` [Bug c++/47864] " pinskia at gcc dot gnu.org
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