[Bug c++/28908] New: Assertion `strstr (name, "::") == NULL' failed. listing member function names of a namespace class

[Bug c++/28908] New: Assertion `strstr (name, "::") == NULL' failed. listing member function names of a namespace class

[msebor at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=28908

            Bug ID: 28908
           Summary: Assertion `strstr (name, "::") == NULL' failed.
                    listing member function names of a namespace class
           Product: gdb
           Version: 11.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c++
          Assignee: unassigned at sourceware dot org
          Reporter: msebor at gmail dot com
  Target Milestone: ---

I encountered the following internal error while testing the fix for pr28901. 
The error is with GNU gdb (GDB) Fedora 11.1-5.fc35 but it's reproducible with
trunk.

$ cat t.C && g++ -g3 t.C && gdb -batch -nx -ex "break main" -ex run -ex "print
(N::A*)&b" -ex "list $1->N::A::f" a.out
namespace N {
  struct A { void f () { } };
  struct B: A { };
}

N::B b;

int main ()
{
  b.f ();
}
Breakpoint 1 at 0x40110a: file t.C, line 10.
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".

Breakpoint 1, main () at t.C:10
10        b.f ();
$1 = (N::A *) 0x40401d <b>
../../gdb/cp-namespace.c:178: internal-error: block_symbol
cp_lookup_bare_symbol(const language_defn*, const char*, const block*,
domain_enum, int): Assertion `strstr (name, "::") == NULL' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Quit this debugging session? (y or n) [answered Y; input not from terminal]

This is a bug, please report it.  For instructions, see:
<https://www.gnu.org/software/gdb/bugs/>.

../../gdb/cp-namespace.c:178: internal-error: block_symbol
cp_lookup_bare_symbol(const language_defn*, const char*, const block*,
domain_enum, int): Assertion `strstr (name, "::") == NULL' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Create a core file of GDB? (y or n) [answered Y; input not from terminal]
Aborted (core dumped)

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[Bug c++/28908] Assertion `strstr (name, "::") == NULL' failed. listing member function names of a namespace class

[msebor at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=28908

--- Comment #1 from Martin Sebor <msebor at gmail dot com> ---
The full stack trace with trunk is below:

/src/binutils-gdb/gdb/cp-namespace.c:178: internal-error:
cp_lookup_bare_symbol: Assertion `strstr (name, "::") == NULL' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
----- Backtrace -----
0x4cbb63 gdb_internal_backtrace_1
        /src/binutils-gdb/gdb/bt-utils.c:122
0x4cbb63 _Z22gdb_internal_backtracev
        /src/binutils-gdb/gdb/bt-utils.c:168
0x80ba44 internal_vproblem
        /src/binutils-gdb/gdb/utils.c:394
0x80bc58 _Z15internal_verrorPKciS0_P13__va_list_tag
        /src/binutils-gdb/gdb/utils.c:471
0x9206f1 _Z14internal_errorPKciS0_z
        /src/binutils-gdb/gdbsupport/errors.cc:55
0x53990c cp_lookup_bare_symbol
        /src/binutils-gdb/gdb/cp-namespace.c:178
0x539ab7 cp_lookup_symbol_in_namespace
        /src/binutils-gdb/gdb/cp-namespace.c:325
0x53a3b7 lookup_namespace_scope
        /src/binutils-gdb/gdb/cp-namespace.c:724
0x53a46b
_Z25cp_lookup_symbol_nonlocalPK13language_defnPKcPK5block15domain_enum_tag
        /src/binutils-gdb/gdb/cp-namespace.c:754
0x792d1e lookup_symbol_aux
        /src/binutils-gdb/gdb/symtab.c:2161
0x792e62
_Z25lookup_symbol_in_languagePKcPK5block15domain_enum_tag8languageP20field_of_this_result
        /src/binutils-gdb/gdb/symtab.c:1953
0x646b91 find_label_symbols_in_block
        /src/binutils-gdb/gdb/linespec.c:4009
0x646d8b find_label_symbols
        /src/binutils-gdb/gdb/linespec.c:4053
0x64a6db linespec_parse_basic
        /src/binutils-gdb/gdb/linespec.c:1909
0x64a6db parse_linespec
        /src/binutils-gdb/gdb/linespec.c:2677
0x64aedb event_location_to_sals
        /src/binutils-gdb/gdb/linespec.c:3159
0x64c33d _Z13decode_line_1PK14event_locationiP13program_spaceP6symtabi
        /src/binutils-gdb/gdb/linespec.c:3293
0x4f8261 list_command
        /src/binutils-gdb/gdb/cli/cli-cmds.c:1256
0x4fbf74 _Z8cmd_funcP16cmd_list_elementPKci
        /src/binutils-gdb/gdb/cli/cli-decode.c:2514
0x7ceac1 _Z15execute_commandPKci
        /src/binutils-gdb/gdb/top.c:670
0x5c4e6c _Z15command_handlerPKc
        /src/binutils-gdb/gdb/event-top.c:597
0x5c518a _Z20command_line_handlerOSt10unique_ptrIcN3gdb13xfree_deleterIcEEE
        /src/binutils-gdb/gdb/event-top.c:782
0x5c57ab gdb_rl_callback_handler
        /src/binutils-gdb/gdb/event-top.c:229
0x84b897 rl_callback_read_char
        /src/binutils-gdb/readline/readline/callback.c:281
0x5c40bd gdb_rl_callback_read_char_wrapper_noexcept
        /src/binutils-gdb/gdb/event-top.c:187
0x5c569c gdb_rl_callback_read_char_wrapper
        /src/binutils-gdb/gdb/event-top.c:204
0x5c3d6f _Z19stdin_event_handleriPv
        /src/binutils-gdb/gdb/event-top.c:524
0x920fad gdb_wait_for_event
        /src/binutils-gdb/gdbsupport/event-loop.cc:700
0x92121c gdb_wait_for_event
        /src/binutils-gdb/gdbsupport/event-loop.cc:596
0x92121c _Z16gdb_do_one_eventv
        /src/binutils-gdb/gdbsupport/event-loop.cc:237
0x675e24 start_event_loop
        /src/binutils-gdb/gdb/main.c:421
0x675e24 captured_command_loop
        /src/binutils-gdb/gdb/main.c:481
0x677774 captured_main
        /src/binutils-gdb/gdb/main.c:1348
0x677774 _Z8gdb_mainP18captured_main_args
        /src/binutils-gdb/gdb/main.c:1363
0x431b34 main
        /src/binutils-gdb/gdb/gdb.c:32

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[Bug c++/28908] Assertion `strstr (name, "::") == NULL' failed. listing member function names of a namespace class

[tromey at sourceware dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=28908

Tom Tromey <tromey at sourceware dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |tromey at sourceware dot org

--- Comment #2 from Tom Tromey <tromey at sourceware dot org> ---
> list $1->N::A::f

Seems like another "weird linespec" bug.

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[Bug c++/28908] Assertion `strstr (name, "::") == NULL' failed. listing member function names of a namespace class

[ssbssa at sourceware dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=28908

Hannes Domani <ssbssa at sourceware dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ssbssa at sourceware dot org
   Target Milestone|---                         |14.1
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |DUPLICATE

--- Comment #3 from Hannes Domani <ssbssa at sourceware dot org> ---
Dup.

*** This bug has been marked as a duplicate of bug 25894 ***

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