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* [Bug c++/986] g++ misses warning for reference on temporary that invokes undefined behaviour
[not found] <bug-986-4@http.gcc.gnu.org/bugzilla/>
@ 2011-08-04 13:03 ` redi at gcc dot gnu.org
2011-11-13 5:54 ` jason at gcc dot gnu.org
2011-11-15 5:48 ` jason at gcc dot gnu.org
2 siblings, 0 replies; 3+ messages in thread
From: redi at gcc dot gnu.org @ 2011-08-04 13:03 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=986
--- Comment #31 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-08-04 13:01:31 UTC ---
A similar case I've just added to a comment of PR 49974
struct Y {
Y(int local) : ref(local) { }
int& ref;
};
The reference is dangling as soon as the constructor exits, but in this case
it's bound to a block-scope function parameter with automatic storage duration,
not to a temporary.
I would imagine this could be caught in perform_member_init() by checking if
the member has reference type, then if the initializer has the same type but
DECL_FUNCTION_SCOPE_P is true warn about binding to a local. But I haven't
tried to do that.
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c++/986] g++ misses warning for reference on temporary that invokes undefined behaviour
[not found] <bug-986-4@http.gcc.gnu.org/bugzilla/>
2011-08-04 13:03 ` [Bug c++/986] g++ misses warning for reference on temporary that invokes undefined behaviour redi at gcc dot gnu.org
@ 2011-11-13 5:54 ` jason at gcc dot gnu.org
2011-11-15 5:48 ` jason at gcc dot gnu.org
2 siblings, 0 replies; 3+ messages in thread
From: jason at gcc dot gnu.org @ 2011-11-13 5:54 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=986
--- Comment #32 from Jason Merrill <jason at gcc dot gnu.org> 2011-11-13 05:09:43 UTC ---
Author: jason
Date: Sun Nov 13 05:09:36 2011
New Revision: 181334
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=181334
Log:
PR c++/986
* call.c (set_up_extended_ref_temp): Warn about references
bound to non-static reference members.
* init.c (perform_member_init): Pass in the member.
Added:
trunk/gcc/testsuite/g++.dg/warn/ref-temp1.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/call.c
trunk/gcc/cp/init.c
trunk/gcc/testsuite/ChangeLog
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c++/986] g++ misses warning for reference on temporary that invokes undefined behaviour
[not found] <bug-986-4@http.gcc.gnu.org/bugzilla/>
2011-08-04 13:03 ` [Bug c++/986] g++ misses warning for reference on temporary that invokes undefined behaviour redi at gcc dot gnu.org
2011-11-13 5:54 ` jason at gcc dot gnu.org
@ 2011-11-15 5:48 ` jason at gcc dot gnu.org
2 siblings, 0 replies; 3+ messages in thread
From: jason at gcc dot gnu.org @ 2011-11-15 5:48 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=986
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |jason at gcc dot gnu.org
Resolution| |FIXED
Target Milestone|--- |4.7.0
--- Comment #33 from Jason Merrill <jason at gcc dot gnu.org> 2011-11-15 05:17:45 UTC ---
Added for 4.7.
^ permalink raw reply [flat|nested] 3+ messages in thread
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2011-08-04 13:03 ` [Bug c++/986] g++ misses warning for reference on temporary that invokes undefined behaviour redi at gcc dot gnu.org
2011-11-13 5:54 ` jason at gcc dot gnu.org
2011-11-15 5:48 ` jason at gcc dot gnu.org
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