llvm symbolizer not able to parse debuginfo files

I am trying to run NFS-Ganesha with ASAN in our setup. I am having
difficulties to make llvm symbolizer print symbol names from the
.debug binaries/libraries, once ASAN shows any error;

bash-4.2# /opt/rh/llvm-toolset-7/root/usr/bin/llvm-symbolizer --version
LLVM (http://llvm.org/):
  LLVM version 5.0.1
  Optimized build.
  Default target: x86_64-unknown-linux-gnu
  Host CPU: nocona

I am getting the following error (The addr2line is working ok, also
gdb is able to parse these files):
python asan_symbolize.py < asan.log.173664