[Bug c++/54828] New: [4.7 Regression] ICE in based_loc_descr at dwarf2out.c:10560 with -g -O0

[Bug c++/54828] New: [4.7 Regression] ICE in based_loc_descr at dwarf2out.c:10560 with -g -O0

[jhb at FreeBSD dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54828

             Bug #: 54828
           Summary: [4.7 Regression] ICE in based_loc_descr at
                    dwarf2out.c:10560 with -g -O0
    Classification: Unclassified
           Product: gcc
           Version: 4.7.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: jhb@FreeBSD.org


Created attachment 28367
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28367
Test case

> g++47 -v --save-temps -c TestFault.cc -g
Using built-in specs.
COLLECT_GCC=g++47
Target: x86_64-portbld-freebsd8.2
Configured with: ./../gcc-4.7-20120818/configure --disable-nls
--enable-languages=c,c++,objc,fortran --libdir=/usr/local/lib/gcc47
--libexecdir=/usr/local/libexec/gcc47 --program-suffix=47
--with-as=/usr/local/bin/as --with-gmp=/usr/local
--with-gxx-include-dir=/usr/local/lib/gcc47/include/c++/
--with-ld=/usr/local/bin/ld --with-libiconv-prefix=/usr/local
--with-pkgversion='FreeBSD Ports Collection' --with-system-zlib
--enable-languages=c,c++,objc,fortran,java --prefix=/usr/local
--mandir=/usr/local/man --infodir=/usr/local/info/gcc47
--build=x86_64-portbld-freebsd8.2
Thread model: posix
gcc version 4.7.2 20120818 (prerelease) (FreeBSD Ports Collection) 
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-c' '-g' '-shared-libgcc'
'-mtune=generic' '-march=x86-64'
 /usr/local/libexec/gcc47/gcc/x86_64-portbld-freebsd8.2/4.7.2/cc1plus -E -quiet
-v TestFault.cc -mtune=generic -march=x86-64 -g -fworking-directory
-fpch-preprocess -o TestFault.ii
ignoring nonexistent directory
"/usr/local/lib/gcc47/gcc/x86_64-portbld-freebsd8.2/4.7.2/../../../../../x86_64-portbld-freebsd8.2/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/local/lib/gcc47/include/c++/
 /usr/local/lib/gcc47/include/c++//x86_64-portbld-freebsd8.2
 /usr/local/lib/gcc47/include/c++//backward
 /usr/local/lib/gcc47/gcc/x86_64-portbld-freebsd8.2/4.7.2/include
 /usr/local/include
 /usr/local/lib/gcc47/gcc/x86_64-portbld-freebsd8.2/4.7.2/include-fixed
 /usr/include
End of search list.
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-c' '-g' '-shared-libgcc'
'-mtune=generic' '-march=x86-64'
 /usr/local/libexec/gcc47/gcc/x86_64-portbld-freebsd8.2/4.7.2/cc1plus
-fpreprocessed TestFault.ii -quiet -dumpbase TestFault.cc -mtune=generic
-march=x86-64 -auxbase TestFault -g -version -o TestFault.s
GNU C++ (FreeBSD Ports Collection) version 4.7.2 20120818 (prerelease)
(x86_64-portbld-freebsd8.2)
        compiled by GNU C version 4.7.2 20120818 (prerelease), GMP version
5.0.1, MPFR version 3.0.0, MPC version 0.8.2
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU C++ (FreeBSD Ports Collection) version 4.7.2 20120818 (prerelease)
(x86_64-portbld-freebsd8.2)
        compiled by GNU C version 4.7.2 20120818 (prerelease), GMP version
5.0.1, MPFR version 3.0.0, MPC version 0.8.2
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: bd38cbf26a83e7a65b138cf0b63e68eb
TestFault.cc: In constructor 'Foo::Foo()':
TestFault.cc:12:1: internal compiler error: Segmentation fault: 11
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

Test case is attached.  4.7.2 release also segfaults in the same way. 
4.5.3.20110203 and 4.6.2.20110909 do not.

Enabling optimization prevents the crash.  The stack trace is below.  The
'cfun' global variable is NULL when the fault occurs.  It is set to NULL in
dwarf2out_abstract_function() via push_cfun() because
DECL_STRUCT_FUNCTION(decl) is NULL (verified by running cc1plus under gdb).

I am using the following hackish patch as a temporary workaround:

--- gcc/dwarf2out.c.orig        2012-10-05 13:11:57.000000000 -0400
+++ gcc/dwarf2out.c     2012-10-05 13:27:32.000000000 -0400
@@ -17046,6 +17046,10 @@
     /* We've already generated the abstract instance.  */
     return;

+  /* XXX: Workaround that probably isn't correct. */
+  if (DECL_STRUCT_FUNCTION(decl) == NULL)
+    return;
+
   /* We can be called while recursively when seeing block defining inlined
subroutine
      DIE.  Be sure to not clobber the outer location table nor use it or we
would
      get locations in abstract instantces.  */

GDB info:

Program terminated with signal 6, Aborted.
#0  0x0000000801c8e52c in kill () from /lib/libc.so.7
(gdb) where
#0  0x0000000801c8e52c in kill () from /lib/libc.so.7
#1  0x0000000801c8d32b in abort () from /lib/libc.so.7
#2  0x0000000000c92d45 in real_abort () at
.././../gcc-4.7-20120818/gcc/diagnostic.c:909
#3  diagnostic_action_after_output (context=context@entry=0x13c3c80,
diagnostic=<error reading variable: Unhandled dwarf expression opcode 0xfa>)
    at .././../gcc-4.7-20120818/gcc/diagnostic.c:216
#4  0x0000000000c92efe in diagnostic_report_diagnostic (context=0x13c3c80,
diagnostic=diagnostic@entry=0x7fffffffc920) at
.././../gcc-4.7-20120818/gcc/diagnostic.c:552
#5  0x0000000000c93bf0 in internal_error (gmsgid=<optimized out>) at
.././../gcc-4.7-20120818/gcc/diagnostic.c:845
#6  0x00000000008476e0 in crash_signal (signo=11) at
.././../gcc-4.7-20120818/gcc/toplev.c:346
#7  <signal handler called>
#8  based_loc_descr (reg=reg@entry=0x8020014a0, offset=-16,
initialized=VAR_INIT_STATUS_INITIALIZED) at
.././../gcc-4.7-20120818/gcc/dwarf2out.c:10560
#9  0x00000000006963bf in mem_loc_descriptor (rtl=0x80f00d4f8, mode=DImode,
mem_mode=mem_mode@entry=DImode,
initialized=initialized@entry=VAR_INIT_STATUS_INITIALIZED)
    at .././../gcc-4.7-20120818/gcc/dwarf2out.c:11948
#10 0x000000000069b6d1 in loc_descriptor (rtl=rtl@entry=0x80eec50f0,
mode=mode@entry=VOIDmode,
initialized=initialized@entry=VAR_INIT_STATUS_INITIALIZED)
    at .././../gcc-4.7-20120818/gcc/dwarf2out.c:12605
#11 0x000000000069a9d3 in loc_list_from_tree (loc=loc@entry=0x80e0f9280,
want_address=want_address@entry=2) at
.././../gcc-4.7-20120818/gcc/dwarf2out.c:13592
#12 0x000000000069ab5f in add_bound_info
(subrange_die=subrange_die@entry=0x80f0189b0,
bound_attr=bound_attr@entry=DW_AT_upper_bound, bound=bound@entry=0x80e0f9280)
    at .././../gcc-4.7-20120818/gcc/dwarf2out.c:15656
#13 0x000000000069eadc in add_subscript_info (collapse_p=<optimized out>,
type=<optimized out>, type_die=<optimized out>) at
.././../gcc-4.7-20120818/gcc/dwarf2out.c:15745
#14 gen_array_type_die (type=0x80b493a80, context_die=0x80f0188c0) at
.././../gcc-4.7-20120818/gcc/dwarf2out.c:16460
#15 0x000000000068cf05 in gen_type_die_with_usage (type=0x80b493a80,
context_die=context_die@entry=0x80f0188c0,
usage=usage@entry=DINFO_USAGE_DIR_USE)
    at .././../gcc-4.7-20120818/gcc/dwarf2out.c:19057
#16 0x000000000068d28a in gen_type_die (type=<optimized out>,
context_die=context_die@entry=0x80f0188c0) at
.././../gcc-4.7-20120818/gcc/dwarf2out.c:19103
#17 0x000000000069196a in gen_decl_die (decl=0x80b489e60, origin=0x0,
context_die=0x80f0188c0) at .././../gcc-4.7-20120818/gcc/dwarf2out.c:19647
#18 0x000000000068eee5 in decls_for_scope (stmt=stmt@entry=0x80b745460,
context_die=context_die@entry=0x80f0188c0, depth=depth@entry=2)
    at .././../gcc-4.7-20120818/gcc/dwarf2out.c:19237
#19 0x000000000069f0f2 in gen_lexical_block_die (depth=2,
context_die=<optimized out>, stmt=0x80b745460) at
.././../gcc-4.7-20120818/gcc/dwarf2out.c:18222
#20 gen_block_die (stmt=stmt@entry=0x80b745460,
context_die=context_die@entry=0x80f018730, depth=depth@entry=2) at
.././../gcc-4.7-20120818/gcc/dwarf2out.c:19187
#21 0x000000000068ef4e in decls_for_scope (stmt=stmt@entry=0x80b7454b0,
context_die=context_die@entry=0x80f018730, depth=depth@entry=1)
    at .././../gcc-4.7-20120818/gcc/dwarf2out.c:19251
#22 0x000000000069f0f2 in gen_lexical_block_die (depth=1,
context_die=<optimized out>, stmt=0x80b7454b0) at
.././../gcc-4.7-20120818/gcc/dwarf2out.c:18222
#23 gen_block_die (stmt=stmt@entry=0x80b7454b0,
context_die=context_die@entry=0x80f0185f0, depth=depth@entry=1) at
.././../gcc-4.7-20120818/gcc/dwarf2out.c:19187
#24 0x000000000068ef4e in decls_for_scope (stmt=stmt@entry=0x80b745500,
context_die=context_die@entry=0x80f0185f0, depth=depth@entry=0)
    at .././../gcc-4.7-20120818/gcc/dwarf2out.c:19251
#25 0x000000000068f434 in gen_subprogram_die (decl=decl@entry=0x808ea6800,
context_die=context_die@entry=0x80202e000) at
.././../gcc-4.7-20120818/gcc/dwarf2out.c:17666
#26 0x0000000000691bda in gen_decl_die (decl=decl@entry=0x808ea6800,
origin=<optimized out>, origin@entry=0x0, context_die=0x80202e000)
    at .././../gcc-4.7-20120818/gcc/dwarf2out.c:19601
#27 0x000000000068be5b in dwarf2out_decl (decl=decl@entry=0x808ea6800) at
.././../gcc-4.7-20120818/gcc/dwarf2out.c:19977
#28 0x000000000068c0ec in dwarf2out_abstract_function (decl=0x808ea6800) at
.././../gcc-4.7-20120818/gcc/dwarf2out.c:17080
#29 0x0000000000691e1b in gen_decl_die (decl=0x808f73c00,
origin=origin@entry=0x0, context_die=0x80202e000) at
.././../gcc-4.7-20120818/gcc/dwarf2out.c:19558
#30 0x000000000068be5b in dwarf2out_decl (decl=<optimized out>) at
.././../gcc-4.7-20120818/gcc/dwarf2out.c:19977
#31 0x00000000006a1e39 in dwarf2out_function_decl (decl=<optimized out>) at
.././../gcc-4.7-20120818/gcc/dwarf2out.c:19985
#32 0x00000000006d6c3d in rest_of_handle_final () at
.././../gcc-4.7-20120818/gcc/final.c:4350
#33 0x00000000007b8638 in execute_one_pass (pass=pass@entry=0x1258fa0) at
.././../gcc-4.7-20120818/gcc/passes.c:2084
#34 0x00000000007b8981 in execute_pass_list (pass=0x1258fa0) at
.././../gcc-4.7-20120818/gcc/passes.c:2139
#35 0x00000000007b8993 in execute_pass_list (pass=0x1259d40) at
.././../gcc-4.7-20120818/gcc/passes.c:2140
#36 0x00000000007b8993 in execute_pass_list (pass=0x1259da0) at
.././../gcc-4.7-20120818/gcc/passes.c:2140
#37 0x000000000088e609 in tree_rest_of_compilation (fndecl=0x808f73c00) at
.././../gcc-4.7-20120818/gcc/tree-optimize.c:422
#38 0x000000000064764a in cgraph_expand_function (node=0x80b74e480) at
.././../gcc-4.7-20120818/gcc/cgraphunit.c:1837
#39 0x0000000000649022 in cgraph_output_in_order () at
.././../gcc-4.7-20120818/gcc/cgraphunit.c:2002
#40 cgraph_optimize () at .././../gcc-4.7-20120818/gcc/cgraphunit.c:2213
#41 0x00000000006492aa in cgraph_finalize_compilation_unit () at
.././../gcc-4.7-20120818/gcc/cgraphunit.c:1344
#42 0x000000000052b0cb in cp_write_global_declarations () at
.././../gcc-4.7-20120818/gcc/cp/decl2.c:4057
#43 0x0000000000849257 in compile_file () at
.././../gcc-4.7-20120818/gcc/toplev.c:573
#44 do_compile () at .././../gcc-4.7-20120818/gcc/toplev.c:1938
#45 toplev_main (argc=44, argv=0x7fffffffda10) at
.././../gcc-4.7-20120818/gcc/toplev.c:2014
#46 0x00000000004cde4e in _start ()
(gdb) frame 8
#8  based_loc_descr (reg=reg@entry=0x8020014a0, offset=-16,
initialized=VAR_INIT_STATUS_INITIALIZED) at
.././../gcc-4.7-20120818/gcc/dwarf2out.c:10560
10560     dw_fde_ref fde = cfun->fde;
(gdb) p cfun
$1 = (function *) 0x0
(gdb) frame 28
#28 0x000000000068c0ec in dwarf2out_abstract_function (decl=0x808ea6800) at
.././../gcc-4.7-20120818/gcc/dwarf2out.c:17080
17080     dwarf2out_decl (decl);
(gdb) p decl->function_decl.f
$3 = (function *) 0x0
(gdb) l
17075     current_function_decl = decl;
17076     push_cfun (DECL_STRUCT_FUNCTION (decl));
17077
17078     was_abstract = DECL_ABSTRACT (decl);
17079     set_decl_abstract_flags (decl, 1);
17080     dwarf2out_decl (decl);
17081     if (! was_abstract)
17082       set_decl_abstract_flags (decl, 0);
17083
17084     current_function_decl = save_fn;

[Bug c++/54828] [4.7 Regression] ICE in based_loc_descr at dwarf2out.c:10560 with -g -O0

[daniel.kruegler at googlemail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54828

Daniel Krügler <daniel.kruegler at googlemail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |daniel.kruegler at
                   |                            |googlemail dot com

--- Comment #1 from Daniel Krügler <daniel.kruegler at googlemail dot com> 2012-10-06 08:05:43 UTC ---
Also occurs on gcc 4.8.0 20120930 (experimental), pointing here to

"main.cpp|12|internal compiler error: in based_loc_descr, at dwarf2out.c:10193"

[Bug debug/54828] [4.6/4.7/4.8 Regression] ICE in based_loc_descr at dwarf2out.c:10560 with -g -O0

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54828

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2012-10-08
          Component|c++                         |debug
      Known to work|                            |4.5.3
   Target Milestone|---                         |4.6.4
            Summary|[4.7 Regression] ICE in     |[4.6/4.7/4.8 Regression]
                   |based_loc_descr at          |ICE in based_loc_descr at
                   |dwarf2out.c:10560 with -g   |dwarf2out.c:10560 with -g
                   |-O0                         |-O0
     Ever Confirmed|0                           |1

--- Comment #2 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-10-08 12:06:36 UTC ---
Confirmed.

[Bug debug/54828] [4.6/4.7/4.8 Regression] ICE in based_loc_descr at dwarf2out.c:10560 with -g -O0

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54828

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

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

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-10-23 09:07:44 UTC ---
That workaround is definitely wrong.
The problem is that variably_modified_type_p returns false for the VLA
ARRAY_TYPE when running clone_body to clone the abstract ctor into __base_ctor,
because the TYPE_SIZE is
(bitsizetype) ((sizetype) (SAVE_EXPR <(ssizetype) v + -1>) + 1) * 8
and v isn't a auto_var_in_fn_p (it is a global variable).
As variably_modified_type_p returns false, we don't remap the type during
cloning, and then we end up sharing the same ARRAY_TYPE in between the abstract
ctor and base (or even base and comp) ctor, then in one of the real ctors (base
and/or comp) the type is gimplified and suddenly it is
variably_modified_type_p, but as the type is shared, we have a local VAR_DECL
of one of the ctors as TYPE_SIZE{,_UNIT} of the array type also in the other
real ctor and in the abstract ctor.
Better testcase is perhaps:

struct T { T (); virtual ~T (); };
struct S : public virtual T { S (); virtual ~S (); };
int v;
void foo (char *);

S::S ()
{
  char s[v];
  foo (s);
}

So, I wonder if either variably_modified_type_p with fn != NULL shouldn't take
into account !TYPE_SIZES_GIMPLIFIED (assume if gimplify_one_sizepos would
gimplify_expr it, it would turn it into auto_var_in_fn_p containing it),
or if tree-inline.c (remap_type) just shouldn't call variably_modified_type_p
with fn == NULL if !TYPE_SIZES_GIMPLIFIED:

--- gcc/tree-inline.c.jj    2012-10-05 21:25:36.000000000 +0200
+++ gcc/tree-inline.c    2012-10-23 11:05:05.099212208 +0200
@@ -504,7 +504,8 @@ remap_type (tree type, copy_body_data *i
     return *node;

   /* The type only needs remapping if it's variably modified.  */
-  if (! variably_modified_type_p (type, id->src_fn))
+  if (! variably_modified_type_p (type, TYPE_SIZES_GIMPLIFIED (type)
+                    ? id->src_fn : NULL_TREE))
     {
       insert_decl_map (id, type, type);
       return type;

seems to work for this testcase, but haven't tested it more than that.
I hope the inliner is usually used on gimplified functions these days, if the
only exception is the body cloning of ctors/dtors in C++ FE and if lambdas
aren't handled as normal C nested functions (and C++ doesn't have them), this
could perhaps work.

[Bug debug/54828] [4.6/4.7/4.8 Regression] ICE in based_loc_descr at dwarf2out.c:10560 with -g -O0

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54828

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-10-24 09:09:00 UTC ---
Author: jakub
Date: Wed Oct 24 09:08:56 2012
New Revision: 192759

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=192759
Log:
    PR debug/54828
    * gimple.h (is_gimple_sizepos): New inline function.
    * gimplify.c (gimplify_one_sizepos): Use it.  Remove useless
    final assignment to expr variable.
    * tree.c (RETURN_TRUE_IF_VAR): Return true also if
    !TYPE_SIZES_GIMPLIFIED (type) and _t is going to be gimplified
    into a local temporary.

    * g++.dg/debug/pr54828.C: New test.

Added:
    trunk/gcc/testsuite/g++.dg/debug/pr54828.C
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/gimple.h
    trunk/gcc/gimplify.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree.c

[Bug debug/54828] [4.6/4.7 Regression] ICE in based_loc_descr at dwarf2out.c:10560 with -g -O0

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54828

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
                 CC|jakub at gcc dot gnu.org    |
      Known to work|                            |4.8.0
         AssignedTo|unassigned at gcc dot       |jakub at gcc dot gnu.org
                   |gnu.org                     |
            Summary|[4.6/4.7/4.8 Regression]    |[4.6/4.7 Regression] ICE in
                   |ICE in based_loc_descr at   |based_loc_descr at
                   |dwarf2out.c:10560 with -g   |dwarf2out.c:10560 with -g
                   |-O0                         |-O0
      Known to fail|                            |4.6.3, 4.7.2

--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-10-24 09:20:51 UTC ---
Fixed on the trunk so far.

[Bug debug/54828] [4.6/4.7 Regression] ICE in based_loc_descr at dwarf2out.c:10560 with -g -O0

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54828

--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-11-05 15:09:34 UTC ---
Author: jakub
Date: Mon Nov  5 15:09:28 2012
New Revision: 193166

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=193166
Log:
    Backported from mainline
    2012-10-24  Jakub Jelinek  <jakub@redhat.com>

    PR debug/54828
    * gimple.h (is_gimple_sizepos): New inline function.
    * gimplify.c (gimplify_one_sizepos): Use it.  Remove useless
    final assignment to expr variable.
    * tree.c (RETURN_TRUE_IF_VAR): Return true also if
    !TYPE_SIZES_GIMPLIFIED (type) and _t is going to be gimplified
    into a local temporary.

    * g++.dg/debug/pr54828.C: New test.

Added:
    branches/gcc-4_7-branch/gcc/testsuite/g++.dg/debug/pr54828.C
Modified:
    branches/gcc-4_7-branch/gcc/ChangeLog
    branches/gcc-4_7-branch/gcc/gimple.h
    branches/gcc-4_7-branch/gcc/gimplify.c
    branches/gcc-4_7-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_7-branch/gcc/tree.c

[Bug debug/54828] [4.6/4.7 Regression] ICE in based_loc_descr at dwarf2out.c:10560 with -g -O0

[jhb at FreeBSD dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54828

--- Comment #7 from John Baldwin <jhb at FreeBSD dot org> 2012-11-07 14:06:22 UTC ---
I tested the backport to 4.7 on my original production case and it compiles
fine now, thanks!

[Bug debug/54828] [4.6 Regression] ICE in based_loc_descr at dwarf2out.c:10560 with -g -O0

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54828

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P2
      Known to work|                            |4.7.3
            Summary|[4.6/4.7 Regression] ICE in |[4.6 Regression] ICE in
                   |based_loc_descr at          |based_loc_descr at
                   |dwarf2out.c:10560 with -g   |dwarf2out.c:10560 with -g
                   |-O0                         |-O0

[Bug debug/54828] [4.6 Regression] ICE in based_loc_descr at dwarf2out.c:10560 with -g -O0

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54828

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|4.6.4                       |4.7.3

--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> 2013-04-12 16:29:12 UTC ---
The 4.6 branch has been closed, fixed in GCC 4.7.3.