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* [Bug c++/39028] New: C++ front-end rejects "__label__" at the beginning of a block after "for" and "while"
@ 2009-01-29 20:08 springl-gcc at bfw-online dot de
2009-01-29 20:11 ` [Bug c++/39028] [4.3/4.4 Regression] " pinskia at gcc dot gnu dot org
` (7 more replies)
0 siblings, 8 replies; 9+ messages in thread
From: springl-gcc at bfw-online dot de @ 2009-01-29 20:08 UTC (permalink / raw)
To: gcc-bugs
Trying to compile the c++ program label.C
void c ()
{ for (;;) {__label__ l; goto l; l:;}
while (1) {__label__ l; goto l; l:;}
if (1) {__label__ l; goto l; l:;}
do {__label__ l; goto l; l:;} while (1);
{__label__ l; goto l; l:;}
}
using
g++ -Wall -Wextra -c label.C
with g++ versions 4.4.0 20090129 (experimental) and 4.3.3 gives:
label.C: In function 'void c()':
label.C:2: error: '__label__' not at the beginning of a block
label.C:3: error: '__label__' not at the beginning of a block
label.C:3: error: duplicate label 'l'
The fix for bug 32121 "C++ front-end accepts invalid __label__
declarations" (svn revision 129253) moved handling __label__ declarations
to function cp_parser_compound_statement in gcc/cp/parser.c and omitted
it in function cp_parser_already_scoped_statement. The newly introduced
tests cases only check the error case for while and for statements,
unfortunately.
Without any deeper understanding of gcc internals, I suggest two
possible fixes:
- copy the two lines handling __label__ declarations
from function cp_parser_compound_statement to function
cp_parser_already_scoped_statement, which might be the smallest change or
- merge part of cp_parser_already_scoped_statement's functionality to
cp_parser_compound_statement avoiding code duplication.
--
Summary: C++ front-end rejects "__label__" at the beginning of a
block after "for" and "while"
Product: gcc
Version: 4.4.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: springl-gcc at bfw-online dot de
GCC build triplet: i686-pc-linux-gnu
GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39028
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug c++/39028] [4.3/4.4 Regression] C++ front-end rejects "__label__" at the beginning of a block after "for" and "while"
2009-01-29 20:08 [Bug c++/39028] New: C++ front-end rejects "__label__" at the beginning of a block after "for" and "while" springl-gcc at bfw-online dot de
@ 2009-01-29 20:11 ` pinskia at gcc dot gnu dot org
2009-01-30 12:00 ` jakub at gcc dot gnu dot org
` (6 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2009-01-29 20:11 UTC (permalink / raw)
To: gcc-bugs
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |pinskia at gcc dot gnu dot
| |org
Keywords| |rejects-valid
Summary|C++ front-end rejects |[4.3/4.4 Regression] C++
|"__label__" at the beginning|front-end rejects
|of a block after "for" and |"__label__" at the beginning
|"while" |of a block after "for" and
| |"while"
Target Milestone|--- |4.3.4
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39028
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug c++/39028] [4.3/4.4 Regression] C++ front-end rejects "__label__" at the beginning of a block after "for" and "while"
2009-01-29 20:08 [Bug c++/39028] New: C++ front-end rejects "__label__" at the beginning of a block after "for" and "while" springl-gcc at bfw-online dot de
2009-01-29 20:11 ` [Bug c++/39028] [4.3/4.4 Regression] " pinskia at gcc dot gnu dot org
@ 2009-01-30 12:00 ` jakub at gcc dot gnu dot org
2009-01-30 16:18 ` jakub at gcc dot gnu dot org
` (5 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: jakub at gcc dot gnu dot org @ 2009-01-30 12:00 UTC (permalink / raw)
To: gcc-bugs
--
jakub at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|unassigned at gcc dot gnu |jakub at gcc dot gnu dot org
|dot org |
Status|UNCONFIRMED |ASSIGNED
Ever Confirmed|0 |1
Last reconfirmed|0000-00-00 00:00:00 |2009-01-30 12:00:49
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39028
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug c++/39028] [4.3/4.4 Regression] C++ front-end rejects "__label__" at the beginning of a block after "for" and "while"
2009-01-29 20:08 [Bug c++/39028] New: C++ front-end rejects "__label__" at the beginning of a block after "for" and "while" springl-gcc at bfw-online dot de
2009-01-29 20:11 ` [Bug c++/39028] [4.3/4.4 Regression] " pinskia at gcc dot gnu dot org
2009-01-30 12:00 ` jakub at gcc dot gnu dot org
@ 2009-01-30 16:18 ` jakub at gcc dot gnu dot org
2009-01-30 16:18 ` [Bug c++/39028] [4.3 " jakub at gcc dot gnu dot org
` (4 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: jakub at gcc dot gnu dot org @ 2009-01-30 16:18 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from jakub at gcc dot gnu dot org 2009-01-30 16:17 -------
Subject: Bug 39028
Author: jakub
Date: Fri Jan 30 16:17:30 2009
New Revision: 143797
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=143797
Log:
PR c++/39028
* parser.c (cp_parser_already_scoped_statement): Handle __label__
declarations.
* g++.dg/ext/label12.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/ext/label12.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/parser.c
trunk/gcc/testsuite/ChangeLog
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39028
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug c++/39028] [4.3 Regression] C++ front-end rejects "__label__" at the beginning of a block after "for" and "while"
2009-01-29 20:08 [Bug c++/39028] New: C++ front-end rejects "__label__" at the beginning of a block after "for" and "while" springl-gcc at bfw-online dot de
` (2 preceding siblings ...)
2009-01-30 16:18 ` jakub at gcc dot gnu dot org
@ 2009-01-30 16:18 ` jakub at gcc dot gnu dot org
2009-02-21 13:16 ` rguenth at gcc dot gnu dot org
` (3 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: jakub at gcc dot gnu dot org @ 2009-01-30 16:18 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from jakub at gcc dot gnu dot org 2009-01-30 16:18 -------
Fixed on the trunk so far.
--
jakub at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[4.3/4.4 Regression] C++ |[4.3 Regression] C++ front-
|front-end rejects |end rejects "__label__" at
|"__label__" at the beginning|the beginning of a block
|of a block after "for" and |after "for" and "while"
|"while" |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39028
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug c++/39028] [4.3 Regression] C++ front-end rejects "__label__" at the beginning of a block after "for" and "while"
2009-01-29 20:08 [Bug c++/39028] New: C++ front-end rejects "__label__" at the beginning of a block after "for" and "while" springl-gcc at bfw-online dot de
` (3 preceding siblings ...)
2009-01-30 16:18 ` [Bug c++/39028] [4.3 " jakub at gcc dot gnu dot org
@ 2009-02-21 13:16 ` rguenth at gcc dot gnu dot org
2009-03-13 22:57 ` rguenth at gcc dot gnu dot org
` (2 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2009-02-21 13:16 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from rguenth at gcc dot gnu dot org 2009-02-21 13:16 -------
In which gcc version did this work?
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39028
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug c++/39028] [4.3 Regression] C++ front-end rejects "__label__" at the beginning of a block after "for" and "while"
2009-01-29 20:08 [Bug c++/39028] New: C++ front-end rejects "__label__" at the beginning of a block after "for" and "while" springl-gcc at bfw-online dot de
` (4 preceding siblings ...)
2009-02-21 13:16 ` rguenth at gcc dot gnu dot org
@ 2009-03-13 22:57 ` rguenth at gcc dot gnu dot org
2009-08-04 12:47 ` rguenth at gcc dot gnu dot org
2010-05-22 18:29 ` rguenth at gcc dot gnu dot org
7 siblings, 0 replies; 9+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2009-03-13 22:57 UTC (permalink / raw)
To: gcc-bugs
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to fail| |4.3.3
Known to work| |4.2.4 4.4.0
Priority|P3 |P2
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39028
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug c++/39028] [4.3 Regression] C++ front-end rejects "__label__" at the beginning of a block after "for" and "while"
2009-01-29 20:08 [Bug c++/39028] New: C++ front-end rejects "__label__" at the beginning of a block after "for" and "while" springl-gcc at bfw-online dot de
` (5 preceding siblings ...)
2009-03-13 22:57 ` rguenth at gcc dot gnu dot org
@ 2009-08-04 12:47 ` rguenth at gcc dot gnu dot org
2010-05-22 18:29 ` rguenth at gcc dot gnu dot org
7 siblings, 0 replies; 9+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2009-08-04 12:47 UTC (permalink / raw)
To: gcc-bugs
------- Comment #4 from rguenth at gcc dot gnu dot org 2009-08-04 12:29 -------
GCC 4.3.4 is being released, adjusting target milestone.
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|4.3.4 |4.3.5
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39028
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug c++/39028] [4.3 Regression] C++ front-end rejects "__label__" at the beginning of a block after "for" and "while"
2009-01-29 20:08 [Bug c++/39028] New: C++ front-end rejects "__label__" at the beginning of a block after "for" and "while" springl-gcc at bfw-online dot de
` (6 preceding siblings ...)
2009-08-04 12:47 ` rguenth at gcc dot gnu dot org
@ 2010-05-22 18:29 ` rguenth at gcc dot gnu dot org
7 siblings, 0 replies; 9+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2010-05-22 18:29 UTC (permalink / raw)
To: gcc-bugs
------- Comment #5 from rguenth at gcc dot gnu dot org 2010-05-22 18:13 -------
GCC 4.3.5 is being released, adjusting target milestone.
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|4.3.5 |4.3.6
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39028
^ permalink raw reply [flat|nested] 9+ messages in thread
end of thread, other threads:[~2010-05-22 18:29 UTC | newest]
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2009-01-29 20:08 [Bug c++/39028] New: C++ front-end rejects "__label__" at the beginning of a block after "for" and "while" springl-gcc at bfw-online dot de
2009-01-29 20:11 ` [Bug c++/39028] [4.3/4.4 Regression] " pinskia at gcc dot gnu dot org
2009-01-30 12:00 ` jakub at gcc dot gnu dot org
2009-01-30 16:18 ` jakub at gcc dot gnu dot org
2009-01-30 16:18 ` [Bug c++/39028] [4.3 " jakub at gcc dot gnu dot org
2009-02-21 13:16 ` rguenth at gcc dot gnu dot org
2009-03-13 22:57 ` rguenth at gcc dot gnu dot org
2009-08-04 12:47 ` rguenth at gcc dot gnu dot org
2010-05-22 18:29 ` rguenth at gcc dot gnu dot org
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