Use |nm -A| instead of |nm -l| to avoid depending on imprecise debug
information in optimized builds. (And to get the 100x faster
performance.)
Fix a problem with the filename regex so we can also detect symbol
references in from source files with a hyphen in their name.
When bad allocation references are detected, display results from |nm -l|
so we still get the useful line number information.
abc917a355