[Bug c++/63588] New: [5 Regression] ICE (segfault) on arm-linux-gnueabihf

[Bug c++/63588] New: [5 Regression] ICE (segfault) on arm-linux-gnueabihf

[doko at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63588

            Bug ID: 63588
           Summary: [5 Regression] ICE (segfault) on arm-linux-gnueabihf
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: doko at gcc dot gnu.org

seen building libjava on arm-linux-gnueabihf on the trunk (PR63574 for the
bootstrap issue).

$ cat foo.cc 
template < class T > T elements;
       elements <> 
$ /home/doko/gcc/gcc-snapshot-20141017/build/gcc/xg++
-B/home/doko/gcc/gcc-snapshot-20141017/build/gcc/ -c -O2 foo.cc
foo.cc:1:24: warning: variable templates only available with -std=c++14 or
-std=gnu++14
 template < class T > T elements;
                        ^
foo.cc:2:18: internal compiler error: Segmentation fault
        elements <> 
                  ^
Please submit a full bug report,
with preprocessed source if appropriate.


unsure if this is correctly reduced, because the original file in PR63574
succeeds to build with -O1.

[Bug c++/63588] [5 Regression] ICE (segfault) on arm-linux-gnueabihf

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63588

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |5.0

[Bug c++/63588] [5 Regression] ICE (segfault) on arm-linux-gnueabihf

[ktkachov at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63588

ktkachov at gcc dot gnu.org changed:

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

--- Comment #1 from ktkachov at gcc dot gnu.org ---
So is there a reduced testcase for this?

[Bug c++/63588] [5 Regression] ICE (segfault) on arm-linux-gnueabihf

[doko at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63588

--- Comment #2 from Matthias Klose <doko at gcc dot gnu.org> ---
yes, see above.

[Bug c++/63588] [5 Regression] ICE (segfault) on arm-linux-gnueabihf

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63588

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|ice-on-valid-code           |ice-on-invalid-code
             Target|arm-linxux-gnueabihf        |
           Priority|P3                          |P1
             Status|UNCONFIRMED                 |WAITING
   Last reconfirmed|                            |2014-11-20
     Ever confirmed|0                           |1

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed on x86_64.

#0  0x000000000073fb39 in uses_template_parms (t=<tree 0x0>)
    at /space/rguenther/src/svn/trunk/gcc/cp/pt.c:8284
#1  0x000000000073dfb4 in lookup_template_variable (
    templ=<template_decl 0x7ffff6da2080 elements>, arglist=<tree 0x0>)
    at /space/rguenther/src/svn/trunk/gcc/cp/pt.c:8019
#2  0x0000000000803278 in cp_parser_template_id (parser=0x7ffff6da2000, 
    template_keyword_p=false, check_dependency_p=false, tag_type=none_type, 
    is_declaration=false)
    at /space/rguenther/src/svn/trunk/gcc/cp/parser.c:13752
#3  0x000000000080d617 in cp_parser_class_name (parser=0x7ffff6da2000, 
    typename_keyword_p=false, template_keyword_p=false, tag_type=none_type, 
    check_dependency_p=false, class_head_p=false, is_declaration=false)
    at /space/rguenther/src/svn/trunk/gcc/cp/parser.c:19598
#4  0x00000000007f5ba6 in cp_parser_qualifying_entity (parser=0x7ffff6da2000, 
    typename_keyword_p=false, template_keyword_p=false, 
    check_dependency_p=false, type_p=false, is_declaration=false)
    at /space/rguenther/src/svn/trunk/gcc/cp/parser.c:5645
#5  0x00000000007f4db1 in cp_parser_nested_name_specifier_opt (
    parser=0x7ffff6da2000, typename_keyword_p=false, check_dependency_p=false, 
    type_p=false, is_declaration=false)
    at /space/rguenther/src/svn/trunk/gcc/cp/parser.c:5370

note the reduced testcase is invalid (obviously).  Please provide unreduced.

[Bug c++/63588] [5 Regression] ICE (segfault) on arm-linux-gnueabihf

[doko at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63588

--- Comment #4 from Matthias Klose <doko at gcc dot gnu.org> ---
libjava builds again with 20141119 on arm-linux-gnueabihf

[Bug c++/63588] [5 Regression] ICE (segfault) on arm-linux-gnueabihf

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63588

--- Comment #5 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Fri Nov 21 21:34:54 2014
New Revision: 217948

URL: https://gcc.gnu.org/viewcvs?rev=217948&root=gcc&view=rev
Log:
    PR c++/63588
    * pt.c (uses_template_parms): Handle null argument.

Added:
    trunk/gcc/testsuite/g++.dg/cpp1y/var-templ15.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/pt.c

[Bug c++/63588] [5 Regression] ICE (segfault) on arm-linux-gnueabihf

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63588

Jason Merrill <jason at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |RESOLVED
                 CC|                            |jason at gcc dot gnu.org
         Resolution|---                         |FIXED
           Assignee|unassigned at gcc dot gnu.org      |jason at gcc dot gnu.org

--- Comment #6 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed.