[Bug c++/66808] New: tree check fail in symbol_table::decl_assembler_name_hash

[Bug c++/66808] New: tree check fail in symbol_table::decl_assembler_name_hash

[dcb314 at hotmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66808

            Bug ID: 66808
           Summary: tree check fail in
                    symbol_table::decl_assembler_name_hash
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dcb314 at hotmail dot com
  Target Milestone: ---

Created attachment 35932
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=35932&action=edit
gzipped C++ source code

gcc trunk dated 20150707 does this

$ ../results/bin/gcc -c -O2 bug216.cc
/home/dcb/rpmbuild/BUILD/qpid-cpp-0.32/src/qpid/sys/epoll/EpollPoller.cpp:677:2:
internal compiler error: Segmentation fault
 }}
  ^
0xe6d3ff crash_signal
        ../../src/trunk/gcc/toplev.c:360
0x91fa84 tree_check(tree_node const*, char const*, int, char const*, tree_code)
        ../../src/trunk/gcc/tree.h:3113
0x91fa84 symbol_table::decl_assembler_name_hash(tree_node const*)
        ../../src/trunk/gcc/symtab.c:72
0x9265b2 symtab_node::get_for_asmname(tree_node const*)
        ../../src/trunk/gcc/symtab.c:872

[Bug c++/66808] tree check fail in symbol_table::decl_assembler_name_hash

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66808

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2015-07-08
                 CC|                            |mpolacek at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Confirmed.

[Bug c++/66808] tree check fail in symbol_table::decl_assembler_name_hash

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66808

--- Comment #3 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
template <typename> class A {
  int *destroyThreadState_threadStatus = getThreadStatus();
  int *getThreadStatus() {
    static __thread int a;
    return &a;
  }
};
A<int> b;

[Bug c++/66808] tree check fail in symbol_table::decl_assembler_name_hash

[dcb314 at hotmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66808

--- Comment #4 from David Binderman <dcb314 at hotmail dot com> ---
(In reply to David Binderman from comment #0)
> Created attachment 35932 [details]
> gzipped C++ source code
> 
> gcc trunk dated 20150707 does this
> 
> $ ../results/bin/gcc -c -O2 bug216.cc
> /home/dcb/rpmbuild/BUILD/qpid-cpp-0.32/src/qpid/sys/epoll/EpollPoller.cpp:
> 677:2: internal compiler error: Segmentation fault
>  }}
>   ^
> 0xe6d3ff crash_signal
> 	../../src/trunk/gcc/toplev.c:360
> 0x91fa84 tree_check(tree_node const*, char const*, int, char const*,
> tree_code)
> 	../../src/trunk/gcc/tree.h:3113
> 0x91fa84 symbol_table::decl_assembler_name_hash(tree_node const*)
> 	../../src/trunk/gcc/symtab.c:72
> 0x9265b2 symtab_node::get_for_asmname(tree_node const*)
> 	../../src/trunk/gcc/symtab.c:872

Some more detail from valgrind

==3165== Invalid read of size 8
==3165==    at 0xD1A12C: make_decl_rtl(tree_node*) (varasm.c:1361)
==3165==    by 0x830312: expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool) (expr.c:9445)
==3165==    by 0x838BB6: store_expr_with_bounds(tree_node*, rtx_def*, int,
bool, tree_node*) (expr.c:5398)
==3165==    by 0x83A0DC: expand_assignment(tree_node*, tree_node*, bool)
(expr.c:5170)

...

==3165==  Address 0x18 is not stack'd, malloc'd or (recently) free'd
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idf521

--- Comment #5 from Eric Gallager <egall at gwmail dot gwu.edu> ---
(In reply to ctice from comment #4)
> Created attachment 36082 [details]
> Tentative patch to fix this issue.
>
> I believe the attached patch will fix this problem.  I would appreciate it
> if Eric would confirm that.
>

Well, I can confirm that it gets the build past the point of failure that I
originally mentioned... now I'm seeing a different failure in
libstdc++-v3/src/filesystem/dir.cc though, but I think it's unrelated to this
one; I think I had to pass the '--disable-libstdcxx-filesystem-ts' flag to
configure last time to get past it... I'll open a new PR about it. (Your patch
should be good enough to close this one, though.)