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* [Bug fortran/50627] New: [OOP] Error recovery: ICE in gfc_free_namespace after properly diagnosing bogus SELECT TYPE in MODULE
@ 2011-10-06  9:59 burnus at gcc dot gnu.org
  2011-10-06 10:48 ` [Bug fortran/50627] " janus at gcc dot gnu.org
                   ` (11 more replies)
  0 siblings, 12 replies; 13+ messages in thread
From: burnus at gcc dot gnu.org @ 2011-10-06  9:59 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50627

             Bug #: 50627
           Summary: [OOP] Error recovery: ICE in gfc_free_namespace after
                    properly diagnosing bogus SELECT TYPE in MODULE
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Keywords: error-recovery, ice-on-invalid-code
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: burnus@gcc.gnu.org


The following bogus code is properly diagnosed but then once gets an ICE:

.... (some more error messages) ...

Error: Expecting END MODULE statement at (1)
f951: internal compiler error: in gfc_free_namespace, at fortran/symbol.c:3259


The result is the same for 4.6 and 4.7; 4.5 seems to enter an endless loop -
and 4.4 simply prints an error as it does not know CLASS or SELECT TYPE.


module m
  type t
  end type t
  class(t), allocatable :: xx
  select type(xx)
  ! type is(t)
  !   stop
  end select
end


^ permalink raw reply	[flat|nested] 13+ messages in thread
* [Bug fortran/50627] [OOP] Error recovery: ICE in gfc_free_namespace after properly diagnosing bogus SELECT TYPE in MODULE
  2011-10-06  9:59 [Bug fortran/50627] New: [OOP] Error recovery: ICE in gfc_free_namespace after properly diagnosing bogus SELECT TYPE in MODULE burnus at gcc dot gnu.org
@ 2011-10-06 10:48 ` janus at gcc dot gnu.org
  2011-10-06 10:59 ` janus at gcc dot gnu.org
                   ` (10 subsequent siblings)
  11 siblings, 0 replies; 13+ messages in thread
From: janus at gcc dot gnu.org @ 2011-10-06 10:48 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50627

janus at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2011-10-06
                 CC|                            |janus at gcc dot gnu.org
     Ever Confirmed|0                           |1

--- Comment #1 from janus at gcc dot gnu.org 2011-10-06 10:47:59 UTC ---
(In reply to comment #0)
> f951: internal compiler error: in gfc_free_namespace, at fortran/symbol.c:3259

That line is:

  gcc_assert (ns->refs == 0);


^ permalink raw reply	[flat|nested] 13+ messages in thread
* [Bug fortran/50627] [OOP] Error recovery: ICE in gfc_free_namespace after properly diagnosing bogus SELECT TYPE in MODULE
  2011-10-06  9:59 [Bug fortran/50627] New: [OOP] Error recovery: ICE in gfc_free_namespace after properly diagnosing bogus SELECT TYPE in MODULE burnus at gcc dot gnu.org
  2011-10-06 10:48 ` [Bug fortran/50627] " janus at gcc dot gnu.org
@ 2011-10-06 10:59 ` janus at gcc dot gnu.org
  2011-10-09 18:13 ` [Bug fortran/50627] Error recovery: ICE in gfc_free_namespace after diagnosing missing end of construct tkoenig at gcc dot gnu.org
                   ` (9 subsequent siblings)
  11 siblings, 0 replies; 13+ messages in thread
From: janus at gcc dot gnu.org @ 2011-10-06 10:59 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50627

--- Comment #2 from janus at gcc dot gnu.org 2011-10-06 10:58:57 UTC ---
(In reply to comment #1)
> > f951: internal compiler error: in gfc_free_namespace, at fortran/symbol.c:3259
> 
> That line is:
> 
>   gcc_assert (ns->refs == 0);

... and the problem is that ns->refs is "-1", which probably means we free the
namespace twice ?!?


^ permalink raw reply	[flat|nested] 13+ messages in thread
* [Bug fortran/50627] Error recovery: ICE in gfc_free_namespace after diagnosing missing end of construct
  2011-10-06  9:59 [Bug fortran/50627] New: [OOP] Error recovery: ICE in gfc_free_namespace after properly diagnosing bogus SELECT TYPE in MODULE burnus at gcc dot gnu.org
  2011-10-06 10:48 ` [Bug fortran/50627] " janus at gcc dot gnu.org
  2011-10-06 10:59 ` janus at gcc dot gnu.org
@ 2011-10-09 18:13 ` tkoenig at gcc dot gnu.org
  2011-10-09 19:12 ` mikael at gcc dot gnu.org
                   ` (8 subsequent siblings)
  11 siblings, 0 replies; 13+ messages in thread
From: tkoenig at gcc dot gnu.org @ 2011-10-09 18:13 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50627

Thomas Koenig <tkoenig at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |tkoenig at gcc dot gnu.org
            Summary|[OOP] Error recovery: ICE   |Error recovery: ICE in
                   |in gfc_free_namespace after |gfc_free_namespace after
                   |properly diagnosing bogus   |diagnosing missing end of
                   |SELECT TYPE in MODULE       |construct

--- Comment #3 from Thomas Koenig <tkoenig at gcc dot gnu.org> 2011-10-09 18:12:31 UTC ---
Simpler test case:

ig25@linux-fd1f:~/Krempel/OMP> cat block.f90
program main
  block
end program main
ig25@linux-fd1f:~/Krempel/OMP> gfortran block.f90
block.f90:3.3:

end program main
   1
Error: Expecting END BLOCK statement at (1)
Error: Unexpected end of file in 'block.f90'
f951: internal compiler error: in gfc_free_namespace, at fortran/symbol.c:3259
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.


^ permalink raw reply	[flat|nested] 13+ messages in thread
* [Bug fortran/50627] Error recovery: ICE in gfc_free_namespace after diagnosing missing end of construct
  2011-10-06  9:59 [Bug fortran/50627] New: [OOP] Error recovery: ICE in gfc_free_namespace after properly diagnosing bogus SELECT TYPE in MODULE burnus at gcc dot gnu.org
                   ` (2 preceding siblings ...)
  2011-10-09 18:13 ` [Bug fortran/50627] Error recovery: ICE in gfc_free_namespace after diagnosing missing end of construct tkoenig at gcc dot gnu.org
@ 2011-10-09 19:12 ` mikael at gcc dot gnu.org
  2013-01-20 18:08 ` Joost.VandeVondele at mat dot ethz.ch
                   ` (7 subsequent siblings)
  11 siblings, 0 replies; 13+ messages in thread
From: mikael at gcc dot gnu.org @ 2011-10-09 19:12 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50627

Mikael Morin <mikael at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mikael at gcc dot gnu.org

--- Comment #4 from Mikael Morin <mikael at gcc dot gnu.org> 2011-10-09 19:11:14 UTC ---
For the problem in comment #0:
As we parse select type, we create a new namespace.
The statement is (correctly) rejected, but we don't free the namespace.
Then we are back parsing module content, and the code doing that assumes that
gfc_current_namespace points to the module namespace, which is not the case
anymore (it points to the select namespace).

I assume that the problem in comment #3 is of the same kind: 
We parse some block content, encounter end of file, then are back at parsing
the main program unit with gfc_current_ns still pointing to the block
namespace.


^ permalink raw reply	[flat|nested] 13+ messages in thread
* [Bug fortran/50627] Error recovery: ICE in gfc_free_namespace after diagnosing missing end of construct
  2011-10-06  9:59 [Bug fortran/50627] New: [OOP] Error recovery: ICE in gfc_free_namespace after properly diagnosing bogus SELECT TYPE in MODULE burnus at gcc dot gnu.org
                   ` (3 preceding siblings ...)
  2011-10-09 19:12 ` mikael at gcc dot gnu.org
@ 2013-01-20 18:08 ` Joost.VandeVondele at mat dot ethz.ch
  2013-01-20 18:10 ` [Bug fortran/50627] [4.6/4.7/4.8 Regression] " Joost.VandeVondele at mat dot ethz.ch
                   ` (6 subsequent siblings)
  11 siblings, 0 replies; 13+ messages in thread
From: Joost.VandeVondele at mat dot ethz.ch @ 2013-01-20 18:08 UTC (permalink / raw)
  To: gcc-bugs


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50627

Joost VandeVondele <Joost.VandeVondele at mat dot ethz.ch> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Blocks|                            |56054
                 CC|                            |Joost.VandeVondele at mat
                   |                            |dot ethz.ch

--- Comment #5 from Joost VandeVondele <Joost.VandeVondele at mat dot ethz.ch> 2013-01-20 18:08:20 UTC ---
*** Bug 56054 has been marked as a duplicate of this bug. ***


^ permalink raw reply	[flat|nested] 13+ messages in thread
* [Bug fortran/50627] [4.6/4.7/4.8 Regression] Error recovery: ICE in gfc_free_namespace after diagnosing missing end of construct
  2011-10-06  9:59 [Bug fortran/50627] New: [OOP] Error recovery: ICE in gfc_free_namespace after properly diagnosing bogus SELECT TYPE in MODULE burnus at gcc dot gnu.org
                   ` (4 preceding siblings ...)
  2013-01-20 18:08 ` Joost.VandeVondele at mat dot ethz.ch
@ 2013-01-20 18:10 ` Joost.VandeVondele at mat dot ethz.ch
  2013-01-27 13:35 ` tkoenig at gcc dot gnu.org
                   ` (5 subsequent siblings)
  11 siblings, 0 replies; 13+ messages in thread
From: Joost.VandeVondele at mat dot ethz.ch @ 2013-01-20 18:10 UTC (permalink / raw)
  To: gcc-bugs


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50627

Joost VandeVondele <Joost.VandeVondele at mat dot ethz.ch> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|Error recovery: ICE in      |[4.6/4.7/4.8 Regression]
                   |gfc_free_namespace after    |Error recovery: ICE in
                   |diagnosing missing end of   |gfc_free_namespace after
                   |construct                   |diagnosing missing end of
                   |                            |construct

--- Comment #6 from Joost VandeVondele <Joost.VandeVondele at mat dot ethz.ch> 2013-01-20 18:10:09 UTC ---
The testcase in PR56054 shows the ICE is a regression wrt to 4.5


^ permalink raw reply	[flat|nested] 13+ messages in thread
* [Bug fortran/50627] [4.6/4.7/4.8 Regression] Error recovery: ICE in gfc_free_namespace after diagnosing missing end of construct
  2011-10-06  9:59 [Bug fortran/50627] New: [OOP] Error recovery: ICE in gfc_free_namespace after properly diagnosing bogus SELECT TYPE in MODULE burnus at gcc dot gnu.org
                   ` (5 preceding siblings ...)
  2013-01-20 18:10 ` [Bug fortran/50627] [4.6/4.7/4.8 Regression] " Joost.VandeVondele at mat dot ethz.ch
@ 2013-01-27 13:35 ` tkoenig at gcc dot gnu.org
  2013-02-02  9:51 ` tkoenig at gcc dot gnu.org
                   ` (4 subsequent siblings)
  11 siblings, 0 replies; 13+ messages in thread
From: tkoenig at gcc dot gnu.org @ 2013-01-27 13:35 UTC (permalink / raw)
  To: gcc-bugs


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50627

Thomas Koenig <tkoenig at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
         AssignedTo|unassigned at gcc dot       |tkoenig at gcc dot gnu.org
                   |gnu.org                     |


^ permalink raw reply	[flat|nested] 13+ messages in thread
* [Bug fortran/50627] [4.6/4.7/4.8 Regression] Error recovery: ICE in gfc_free_namespace after diagnosing missing end of construct
  2011-10-06  9:59 [Bug fortran/50627] New: [OOP] Error recovery: ICE in gfc_free_namespace after properly diagnosing bogus SELECT TYPE in MODULE burnus at gcc dot gnu.org
                   ` (6 preceding siblings ...)
  2013-01-27 13:35 ` tkoenig at gcc dot gnu.org
@ 2013-02-02  9:51 ` tkoenig at gcc dot gnu.org
  2013-02-02  9:52 ` [Bug fortran/50627] [4.6/4.7 " tkoenig at gcc dot gnu.org
                   ` (3 subsequent siblings)
  11 siblings, 0 replies; 13+ messages in thread
From: tkoenig at gcc dot gnu.org @ 2013-02-02  9:51 UTC (permalink / raw)
  To: gcc-bugs


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50627

--- Comment #7 from Thomas Koenig <tkoenig at gcc dot gnu.org> 2013-02-02 09:51:03 UTC ---
Author: tkoenig
Date: Sat Feb  2 09:50:58 2013
New Revision: 195684

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=195684
Log:
2013-02-02  Thomas Koenig  <tkoenig@gcc.gnu.org>

    PR fortran/50627
    PR fortran/56054
    * decl.c (gfc_match_end):  Remove half-ready namespace
    from parent if the end of a block is missing.
    * parse.c (parse_module):  Do not put namespace into
    gsymbol on error.

2013-02-02  Thomas Koenig  <tkoenig@gcc.gnu.org>

    PR fortran/50627
    PR fortran/56054
    * gfortran.dg/block_12.f90:  New test.
    * gfortran.dg/module_error_1.f90:  New test.


Added:
    trunk/gcc/testsuite/gfortran.dg/block_12.f90
    trunk/gcc/testsuite/gfortran.dg/module_error_1.f90
Modified:
    trunk/gcc/fortran/ChangeLog
    trunk/gcc/fortran/decl.c
    trunk/gcc/fortran/parse.c
    trunk/gcc/testsuite/ChangeLog


^ permalink raw reply	[flat|nested] 13+ messages in thread
* [Bug fortran/50627] [4.6/4.7 Regression] Error recovery: ICE in gfc_free_namespace after diagnosing missing end of construct
  2011-10-06  9:59 [Bug fortran/50627] New: [OOP] Error recovery: ICE in gfc_free_namespace after properly diagnosing bogus SELECT TYPE in MODULE burnus at gcc dot gnu.org
                   ` (7 preceding siblings ...)
  2013-02-02  9:51 ` tkoenig at gcc dot gnu.org
@ 2013-02-02  9:52 ` tkoenig at gcc dot gnu.org
  2013-02-02 22:38 ` tkoenig at gcc dot gnu.org
                   ` (2 subsequent siblings)
  11 siblings, 0 replies; 13+ messages in thread
From: tkoenig at gcc dot gnu.org @ 2013-02-02  9:52 UTC (permalink / raw)
  To: gcc-bugs


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50627

Thomas Koenig <tkoenig at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |4.7.3
            Summary|[4.6/4.7/4.8 Regression]    |[4.6/4.7 Regression] Error
                   |Error recovery: ICE in      |recovery: ICE in
                   |gfc_free_namespace after    |gfc_free_namespace after
                   |diagnosing missing end of   |diagnosing missing end of
                   |construct                   |construct

--- Comment #8 from Thomas Koenig <tkoenig at gcc dot gnu.org> 2013-02-02 09:52:38 UTC ---
Fixed on trunk so far.


^ permalink raw reply	[flat|nested] 13+ messages in thread
* [Bug fortran/50627] [4.6/4.7 Regression] Error recovery: ICE in gfc_free_namespace after diagnosing missing end of construct
  2011-10-06  9:59 [Bug fortran/50627] New: [OOP] Error recovery: ICE in gfc_free_namespace after properly diagnosing bogus SELECT TYPE in MODULE burnus at gcc dot gnu.org
                   ` (8 preceding siblings ...)
  2013-02-02  9:52 ` [Bug fortran/50627] [4.6/4.7 " tkoenig at gcc dot gnu.org
@ 2013-02-02 22:38 ` tkoenig at gcc dot gnu.org
  2013-02-03 13:15 ` tkoenig at gcc dot gnu.org
  2013-02-03 13:16 ` tkoenig at gcc dot gnu.org
  11 siblings, 0 replies; 13+ messages in thread
From: tkoenig at gcc dot gnu.org @ 2013-02-02 22:38 UTC (permalink / raw)
  To: gcc-bugs


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50627

--- Comment #9 from Thomas Koenig <tkoenig at gcc dot gnu.org> 2013-02-02 22:38:22 UTC ---
Author: tkoenig
Date: Sat Feb  2 22:38:14 2013
New Revision: 195687

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=195687
Log:
2013-02-02  Thomas Koenig  <tkoenig@gcc.gnu.org>

    Backport from trunk
    PR fortran/50627
    PR fortran/56054
    * decl.c (gfc_match_end):  Remove half-ready namespace
    from parent if the end of a block is missing.
    * parse.c (parse_module):  Do not put namespace into
    gsymbol on error.

2013-02-02  Thomas Koenig  <tkoenig@gcc.gnu.org>

    Backport from trunk
    PR fortran/50627
    PR fortran/56054
    * gfortran.dg/block_12.f90:  New test.
    * gfortran.dg/module_error_1.f90:  New test.


Added:
    branches/gcc-4_7-branch/gcc/testsuite/gfortran.dg/block_12.f90
    branches/gcc-4_7-branch/gcc/testsuite/gfortran.dg/module_error_1.f90
Modified:
    branches/gcc-4_7-branch/gcc/fortran/ChangeLog
    branches/gcc-4_7-branch/gcc/fortran/decl.c
    branches/gcc-4_7-branch/gcc/fortran/parse.c
    branches/gcc-4_7-branch/gcc/testsuite/ChangeLog


^ permalink raw reply	[flat|nested] 13+ messages in thread
* [Bug fortran/50627] [4.6/4.7 Regression] Error recovery: ICE in gfc_free_namespace after diagnosing missing end of construct
  2011-10-06  9:59 [Bug fortran/50627] New: [OOP] Error recovery: ICE in gfc_free_namespace after properly diagnosing bogus SELECT TYPE in MODULE burnus at gcc dot gnu.org
                   ` (9 preceding siblings ...)
  2013-02-02 22:38 ` tkoenig at gcc dot gnu.org
@ 2013-02-03 13:15 ` tkoenig at gcc dot gnu.org
  2013-02-03 13:16 ` tkoenig at gcc dot gnu.org
  11 siblings, 0 replies; 13+ messages in thread
From: tkoenig at gcc dot gnu.org @ 2013-02-03 13:15 UTC (permalink / raw)
  To: gcc-bugs


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50627

--- Comment #10 from Thomas Koenig <tkoenig at gcc dot gnu.org> 2013-02-03 13:15:24 UTC ---
Author: tkoenig
Date: Sun Feb  3 13:15:18 2013
New Revision: 195695

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=195695
Log:
2013-02-03  Thomas Koenig  <tkoenig@gcc.gnu.org>

    Backport from trunk
    PR fortran/50627
    PR fortran/56054
    * decl.c (gfc_match_end):  Remove half-ready namespace
    from parent if the end of a block is missing.
    * parse.c (parse_module):  Do not put namespace into
    gsymbol on error.

2013-02-03  Thomas Koenig  <tkoenig@gcc.gnu.org>

    Backport from trunk
    PR fortran/50627
    PR fortran/56054
    * gfortran.dg/block_12.f90:  New test.
    * gfortran.dg/module_error_1.f90:  New test.


Added:
    branches/gcc-4_6-branch/gcc/testsuite/gfortran.dg/block_12.f90
    branches/gcc-4_6-branch/gcc/testsuite/gfortran.dg/module_error_1.f90
Modified:
    branches/gcc-4_6-branch/gcc/fortran/ChangeLog
    branches/gcc-4_6-branch/gcc/fortran/decl.c
    branches/gcc-4_6-branch/gcc/fortran/parse.c
    branches/gcc-4_6-branch/gcc/testsuite/ChangeLog


^ permalink raw reply	[flat|nested] 13+ messages in thread
* [Bug fortran/50627] [4.6/4.7 Regression] Error recovery: ICE in gfc_free_namespace after diagnosing missing end of construct
  2011-10-06  9:59 [Bug fortran/50627] New: [OOP] Error recovery: ICE in gfc_free_namespace after properly diagnosing bogus SELECT TYPE in MODULE burnus at gcc dot gnu.org
                   ` (10 preceding siblings ...)
  2013-02-03 13:15 ` tkoenig at gcc dot gnu.org
@ 2013-02-03 13:16 ` tkoenig at gcc dot gnu.org
  11 siblings, 0 replies; 13+ messages in thread
From: tkoenig at gcc dot gnu.org @ 2013-02-03 13:16 UTC (permalink / raw)
  To: gcc-bugs


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50627

Thomas Koenig <tkoenig at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED

--- Comment #11 from Thomas Koenig <tkoenig at gcc dot gnu.org> 2013-02-03 13:16:30 UTC ---
Fixed on all affected and supported branches, closing.


^ permalink raw reply	[flat|nested] 13+ messages in thread
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2011-10-06  9:59 [Bug fortran/50627] New: [OOP] Error recovery: ICE in gfc_free_namespace after properly diagnosing bogus SELECT TYPE in MODULE burnus at gcc dot gnu.org
2011-10-06 10:48 ` [Bug fortran/50627] " janus at gcc dot gnu.org
2011-10-06 10:59 ` janus at gcc dot gnu.org
2011-10-09 18:13 ` [Bug fortran/50627] Error recovery: ICE in gfc_free_namespace after diagnosing missing end of construct tkoenig at gcc dot gnu.org
2011-10-09 19:12 ` mikael at gcc dot gnu.org
2013-01-20 18:08 ` Joost.VandeVondele at mat dot ethz.ch
2013-01-20 18:10 ` [Bug fortran/50627] [4.6/4.7/4.8 Regression] " Joost.VandeVondele at mat dot ethz.ch
2013-01-27 13:35 ` tkoenig at gcc dot gnu.org
2013-02-02  9:51 ` tkoenig at gcc dot gnu.org
2013-02-02  9:52 ` [Bug fortran/50627] [4.6/4.7 " tkoenig at gcc dot gnu.org
2013-02-02 22:38 ` tkoenig at gcc dot gnu.org
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