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* [Bug c++/56901] New: [4.9 regression] lambda with implicit capture by reference
@ 2013-04-10 8:29 zeratul976 at hotmail dot com
2013-04-10 8:30 ` [Bug c++/56901] " zeratul976 at hotmail dot com
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: zeratul976 at hotmail dot com @ 2013-04-10 8:29 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56901
Bug #: 56901
Summary: [4.9 regression] lambda with implicit capture by
reference
Classification: Unclassified
Product: gcc
Version: 4.9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: zeratul976@hotmail.com
The following code compiles with gcc 4.8 and clang, but not with gcc 4.9:
template <typename>
void foo_impl()
{
int data;
auto L = [&](){ return data; };
[&](){ L(); }();
}
void foo()
{
foo_impl<int>();
}
The error is:
test.cpp: In instantiation of 'foo_impl() [with <template-parameter-1-1> =
int]::__lambda1':
test.cpp:6:12: required from 'struct foo_impl() [with
<template-parameter-1-1> = int]::__lambda1'
test.cpp:6:19: required from 'void foo_impl() [with <template-parameter-1-1>
= int]'
test.cpp:11:19: required from here
test.cpp:5:14: error: uninitialized const member 'foo_impl() [with
<template-parameter-1-1> = int]::__lambda0::__data'
auto L = [&](){ return data; };
^
The error goes away if:
- foo_impl is made a nontemplate
- the call to the second lambda is inlined
- either lambda is made to capture by value instead of reference
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/56901] [4.9 regression] lambda with implicit capture by reference
2013-04-10 8:29 [Bug c++/56901] New: [4.9 regression] lambda with implicit capture by reference zeratul976 at hotmail dot com
@ 2013-04-10 8:30 ` zeratul976 at hotmail dot com
2013-04-10 8:50 ` paolo.carlini at oracle dot com
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: zeratul976 at hotmail dot com @ 2013-04-10 8:30 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56901
--- Comment #1 from Nathan Ridge <zeratul976 at hotmail dot com> 2013-04-10 08:30:23 UTC ---
Tested with r197663.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/56901] [4.9 regression] lambda with implicit capture by reference
2013-04-10 8:29 [Bug c++/56901] New: [4.9 regression] lambda with implicit capture by reference zeratul976 at hotmail dot com
2013-04-10 8:30 ` [Bug c++/56901] " zeratul976 at hotmail dot com
@ 2013-04-10 8:50 ` paolo.carlini at oracle dot com
2013-04-10 9:30 ` rguenth at gcc dot gnu.org
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: paolo.carlini at oracle dot com @ 2013-04-10 8:50 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56901
Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2013-04-10
Blocks| |54367
Ever Confirmed|0 |1
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/56901] [4.9 regression] lambda with implicit capture by reference
2013-04-10 8:29 [Bug c++/56901] New: [4.9 regression] lambda with implicit capture by reference zeratul976 at hotmail dot com
2013-04-10 8:30 ` [Bug c++/56901] " zeratul976 at hotmail dot com
2013-04-10 8:50 ` paolo.carlini at oracle dot com
@ 2013-04-10 9:30 ` rguenth at gcc dot gnu.org
2013-04-11 16:51 ` jason at gcc dot gnu.org
2013-04-16 21:43 ` jason at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: rguenth at gcc dot gnu.org @ 2013-04-10 9:30 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56901
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |4.9.0
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/56901] [4.9 regression] lambda with implicit capture by reference
2013-04-10 8:29 [Bug c++/56901] New: [4.9 regression] lambda with implicit capture by reference zeratul976 at hotmail dot com
` (2 preceding siblings ...)
2013-04-10 9:30 ` rguenth at gcc dot gnu.org
@ 2013-04-11 16:51 ` jason at gcc dot gnu.org
2013-04-16 21:43 ` jason at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: jason at gcc dot gnu.org @ 2013-04-11 16:51 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56901
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |jason at gcc dot gnu.org
Resolution| |FIXED
AssignedTo|unassigned at gcc dot |jason at gcc dot gnu.org
|gnu.org |
--- Comment #2 from Jason Merrill <jason at gcc dot gnu.org> 2013-04-11 16:51:12 UTC ---
Fixed.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/56901] [4.9 regression] lambda with implicit capture by reference
2013-04-10 8:29 [Bug c++/56901] New: [4.9 regression] lambda with implicit capture by reference zeratul976 at hotmail dot com
` (3 preceding siblings ...)
2013-04-11 16:51 ` jason at gcc dot gnu.org
@ 2013-04-16 21:43 ` jason at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: jason at gcc dot gnu.org @ 2013-04-16 21:43 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56901
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |rmansfield at qnx dot com
--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> 2013-04-16 21:43:38 UTC ---
*** Bug 56857 has been marked as a duplicate of this bug. ***
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2013-04-16 21:43 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
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2013-04-10 8:29 [Bug c++/56901] New: [4.9 regression] lambda with implicit capture by reference zeratul976 at hotmail dot com
2013-04-10 8:30 ` [Bug c++/56901] " zeratul976 at hotmail dot com
2013-04-10 8:50 ` paolo.carlini at oracle dot com
2013-04-10 9:30 ` rguenth at gcc dot gnu.org
2013-04-11 16:51 ` jason at gcc dot gnu.org
2013-04-16 21:43 ` jason at gcc dot gnu.org
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