[Bug c++/68159] Demangler crash (GDB PR 19190)

[clopez at igalia dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68159

--- Comment #13 from Carlos Alberto Lopez Perez <clopez at igalia dot com> ---
(In reply to H.J. Lu from comment #12)
> Created attachment 39042 [details]
> A patch to avoid stack oveflow

This fixes the issue with the previous test case.

However, this other one (obtained from a coredump of WebKitGTK+) is still
crashing:

$ echo
'_ZSt7forwardIRZZN6WebKit29NetworkConnectionToWebProcess26writeBlobsToTemporaryFilesERKN3WTF6VectorINS2_6StringELm0ENS2_15CrashOnOverflowELm16EEEmENUlRT_E_clIS7_EEDaSA_EUlvE_EOS9_RNSt16remove_referenceIS9_E4typeE'
| c++filt 
Segmentation fault (core dumped)