[csmith-project/creduce] 56670f: a bit of debugging code that (I think) will be har...

[John Regehr <regehr@cs.utah.edu>]

  Branch: refs/heads/master
  Home:   https://github.com/csmith-project/creduce
  Commit: 56670fd83292b81a6aea8f7664aa013302cdb7c1
      https://github.com/csmith-project/creduce/commit/56670fd83292b81a6aea8f7664aa013302cdb7c1
  Author: John Regehr <regehr@cs.utah.edu>
  Date:   2016-07-09 (Sat, 09 Jul 2016)

  Changed paths:
    M creduce/creduce.in

  Log Message:
  -----------
  a bit of debugging code that (I think) will be harmless for regular users:
- better stack dumps by redefining the die handler to call carp::confess
- check for duplicate files on cmd line
- bit more verbosity when file copy fails