Here is the changelog which fix this.

2018-12-22  Jason Merrill  <ja...@redhat.com>

        Remove support for demangling GCC 2.x era mangling schemes.
        * cplus-dem.c: Remove cplus_mangle_opname, cplus_demangle_opname,
        internal_cplus_demangle, and all subroutines.
        (libiberty_demanglers): Remove entries for ancient GNU (pre-3.0),
        Lucid, ARM, HP, and EDG demangling styles.
        (cplus_demangle): Remove 'work' variable.  Don't call
        internal_cplus_demangle.

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https://bugs.launchpad.net/bugs/1763101

Title:
  OOM-Bug in cxxfilt (binuitils-2.30-15ubuntu1)

Status in binutils package in Ubuntu:
  Confirmed

Bug description:
  Dear all,
  The following binutils cxxfilt OOM bug was found by a modified version of the 
kAFL fuzzer (https://github.com/RUB-SysSec/kAFL). I have attached the input and 
an ASAN report.

  Steps to reproduce:

  Build current verison of binutils:

  ```
  pull-lp-source binutils
  cd binutils-2.30
  CC=clang CXX=clang++ CFLAGS="-fsanitize=address -fsanitize-recover=address 
-ggdb" CXXFLAGS="-fsanitize=address -fsanitize-recover=address -ggdb" 
LDFLAGS="-fsanitize=address" ./configure
  CC=clang CXX=clang++ CFLAGS="-fsanitize=address -fsanitize-recover=address 
-ggdb" CXXFLAGS="-fsanitize=address
  -fsanitize-recover=address -ggdb" LDFLAGS="-fsanitize=address" make
  ```

  Run inputs under ASAN:

  ```
  ASAN_OPTIONS=halt_on_error=false:allow_addr2line=true ./cxxfilt -t < oom
  ```

  We can verify this issue for cxxfilt binuitils-2.30-15ubuntu1 (Ubuntu
  16.04.4 LTS / sources from "pull-lp-source bintuils") on an Intel(R)
  Core(TM) i7-6700 CPU @ 3.40GHz server machine with 32GB RAM.

  Credits: Sergej Schumilo, Cornelius Aschermann (both of Ruhr-
  Universit├Ąt Bochum)

  Best regards,
  Sergej Schumilo

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