https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70909

--- Comment #18 from Marcel Böhme <boehme.marcel at gmail dot com> ---
(In reply to Markus Trippelsdorf from comment #17)
> Nathan's patch fixes this issue:
> https://patchwork.ozlabs.org/patch/701137/
> It is currently being reviewed.

It doesn't seem to fix the original issue for me.
$ binutils-gdb/build/binutils/cxxfilt
_Z1MA_aMMMMA_MMA_MMMMMMMMSt1MS_o11T0000000000t2M0oooozoooo
Segmentation fault

With Valgrind complaining:
==108073== Memcheck, a memory error detector
==108073== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al.
==108073== Using Valgrind-3.10.1 and LibVEX; rerun with -h for copyright info
==108073== Command: binutils-gdb/build/binutils/cxxfilt
_Z1MA_aMMMMA_MMA_MMMMMMMMSt1MS_o11T0000000000t2M0oooozoooo
==108073== 
==108073== Stack overflow in thread 1: can't grow stack to 0xffe801fe8
==108073== 
==108073== Process terminating with default action of signal 11 (SIGSEGV)
==108073==  Access not within mapped region at address 0xFFE801FE8
==108073==    at 0x7D9704: d_print_comp_inner (cp-demangle.c:4587)

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