Symbolicate exception call stacks

Example exception output with symbolication:

EXCEPTION CDRSpec some failing test
*** -[__NSArrayI objectAtIndex:]: index 4 beyond bounds for empty array
Call stack:
  ...
  *InvalidArrayAccess.m:13
  *CDRSpecSpec.mm:51
  ...
  *main.m:4
  ...
add CEDAR_SKIP_EXCEPTION_SYMBOLICATION
catch potential errors when running atos