[Bug c++/17066] New: GDB demeangler crashes

[Bug c++/17066] New: GDB demeangler crashes

[andre.poenitz at digia dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=17066

            Bug ID: 17066
           Summary: GDB demeangler crashes
           Product: gdb
           Version: 7.7
            Status: NEW
          Severity: normal
          Priority: P2
         Component: c++
          Assignee: unassigned at sourceware dot org
          Reporter: andre.poenitz at digia dot com

I get immedate segfaults when running

 echo 'void
_ZN5Utils9transformIPN15ProjectExplorer13BuildStepListEZNKS1_18BuildConfiguration14knownStepListsEvEUlS3_E_EEN4Myns5QListIDTclfp0_cvT__EEEEERKNS7_IS8_EET0_()
{ } int main() {}' | gcc -xc - && /data/dev/debugger/installed/gdb-git/bin/gdb
./a.out


both with Ubuntu 14.04's "GNU gdb (Ubuntu 7.7-0ubuntu3.1) 7.7" and current
git's HEAD (currently 5d376983)

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[Bug c++/17066] GDB demeangler crashes

[andre.poenitz at digia dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=17066

--- Comment #1 from Andre' <andre.poenitz at digia dot com> ---
The crash was introduced with 492e19d098f4bf4f22bac22815e9cb117be55b33 "Fix
demangler to handle conversion operators correctly"

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[Bug c++/17066] GDB demangler crashes

[palves at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=17066

Pedro Alves <palves at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |palves at redhat dot com
            Summary|GDB demeangler crashes      |GDB demangler crashes

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[Bug c++/17066] GDB demangler crashes

[palves at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=17066

--- Comment #2 from Pedro Alves <palves at redhat dot com> ---
This should fix it then:
 https://gcc.gnu.org/ml/gcc-patches/2014-05/msg02279.html

I haven't managed to get back to that yet...

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[Bug c++/17066] GDB demangler crashes

[gbenson at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=17066

Gary Benson <gbenson at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |gbenson at redhat dot com

--- Comment #3 from Gary Benson <gbenson at redhat dot com> ---
Oh, I thought that was all done and committed.

In any event, I can confirm the crash with latest git gdb.

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[Bug c++/17066] GDB demangler crashes

[andre.poenitz at digia dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=17066

Andre' <andre.poenitz at digia dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ccoutant at google dot com

--- Comment #4 from Andre' <andre.poenitz at digia dot com> ---
For me as well. Thanks.

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[Bug c++/17066] GDB demangler crashes

[andre.poenitz at digia dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=17066

--- Comment #5 from Andre' <andre.poenitz at digia dot com> ---
What I wanted to say: I can confirm the patch fixes the crash.

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[Bug c++/17066] GDB demangler crashes

[orgads at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=17066

Orgad Shaneh <orgads at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |orgads at gmail dot com

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[Bug c++/17066] GDB demangler crashes

[gbenson at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=17066

--- Comment #6 from Gary Benson <gbenson at redhat dot com> ---
Pedro, did you commit this patch now?

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[Bug c++/17066] GDB demangler crashes

[palves at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=17066

--- Comment #7 from Pedro Alves <palves at redhat dot com> ---
It's not just "committing", Jason's comment needs to be addressed somehow:

 https://gcc.gnu.org/ml/gcc-patches/2014-06/msg00084.html

My inclination is that no, we can't fix that without special casing, but 
really I haven't had time to think through that yet.

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[Bug c++/17066] GDB demangler crashes

[gbenson at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=17066

--- Comment #8 from Gary Benson <gbenson at redhat dot com> ---
Ok, thanks for clarifying.

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[Bug c++/17066] GDB demangler crashes

[kenton at sandstorm dot io]

https://sourceware.org/bugzilla/show_bug.cgi?id=17066

Kenton Varda <kenton at sandstorm dot io> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |kenton at sandstorm dot io

--- Comment #9 from Kenton Varda <kenton at sandstorm dot io> ---
FWIW, this bug means that anything using Cap'n Proto RPC
(https://capnproto.org) segfaults GDB. It can be worked around using "set
demangle-style none", but few people encountering this problem know to try
that.

https://github.com/sandstorm-io/capnproto/issues/191

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[Bug c++/17066] GDB demangler crashes

[pageexec at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=17066

PaX Team <pageexec at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |pageexec at gmail dot com

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