[BUG] Crash when demangling with libiberty

[Philippe Daouadi]

Hi,

I have been given these e-mail addresses by Nick Clifton after reporting 
a bug on binutils here: 
https://sourceware.org/bugzilla/show_bug.cgi?id=19877 . The bug is in 
libiberty, according to him.

The bug boils down to this command (and objdump, and lldb) crashing:

     c++filt 
_ZSt4moveIRZN11tconcurrent6futureIvE4thenIZ5awaitIS2_EDaOT_EUlRKS6_E_EENS1_INSt5decayIDTclfp_defpTEEE4typeEEES7_EUlvE_EONSt16remove_referenceIS6_E4typeES7_

I'm using c++filt from binutils 2.26 and have gcc 5.3.1-8 on a debian 
unstable if it is of any matter.

Cheers,
Philippe