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[Bug c++/18697] New: Demangler crash


https://sourceware.org/bugzilla/show_bug.cgi?id=18697

            Bug ID: 18697
           Summary: Demangler crash
           Product: gdb
           Version: 7.9
            Status: NEW
          Severity: normal
          Priority: P2
         Component: c++
          Assignee: unassigned at sourceware dot org
          Reporter: hannes_weisbach at gmx dot net
  Target Milestone: ---

After experiencing segfaults on loading symbols from an executable with
gdb-7.7, I compiled gdb-7.9, which gave me the following message:

Reading symbols from ./intex/experiment...../../gdb/cp-support.c:1583:
demangler-warning: unable to demangle
'_ZN2kjmlIixNS_1_15NanosecondLabelEEENS_8QuantityIDTmlcvT_Li1EcvT0_Li1EET1_EES4_NS3_IS5_S7_EE'
(demangler failed with signal 11)
Unable to dump core, use `ulimit -c unlimited' before executing GDB next time.
../../gdb/cp-support.c:1596: demangler-warning: unable to demangle
'_ZN2kjmlIixNS_1_15NanosecondLabelEEENS_8QuantityIDTmlcvT_Li1EcvT0_Li1EET1_EES4_NS3_IS5_S7_EE'
(demangler failed with signal 11)
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Quit this debugging session? (y or n) n

This seems similar and/or related to bugs 16944, 17066, and 17513.

I'm running Linux 3.18.14 on armv7l, if that's somehow relevant.

Let me know, if you require more information (I'm not sure what else to
provide; I don't have the time to provide a minimal test case.).

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