[Bug other/78252] C++ demangler crashes with infinite recursion with lambda (auto)

["nathan at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78252

--- Comment #6 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Author: nathan
Date: Mon Dec 12 17:38:53 2016
New Revision: 243568

URL: https://gcc.gnu.org/viewcvs?rev=243568&root=gcc&view=rev
Log:
        PR c++/78252
        * cp-demangle.c (struct d_print_info): Add is_lambda_arg field.
        (d_print_init): Initialize it.
        (d_print_comp_inner) <DEMANGLE_COMPONENT_TEMPLATE_PARAM>: Check
        is_lambda_arg for auto.
        <DEMANGLE_COMPONENT_REFERENCE,
        DEMANGLE_COMPONENT_RVALUE_REFERENCE>: Skip smashing check when
        is_lambda_arg.
        <DEMANGLE_COMPONENT_LAMBDA>: Increment is_lambda_arg around arg
        printing.
        * testsuite/demangle-expected: Add lambda auto mangling cases. 

Modified:
    branches/gcc-6-branch/libiberty/ChangeLog
    branches/gcc-6-branch/libiberty/cp-demangle.c
    branches/gcc-6-branch/libiberty/testsuite/demangle-expected