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Adding set -e will cause the script to exit with non-zero status if a shell command exits with non-zero and the status is not checked. We found a case where a problem wasn't being caught and the script kept going in another change. This might help prevent similar problems from going uncaught in the future. Review URL: http://codereview.chromium.org//9168009 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@3148 260f80e4-7a28-3924-810f-c04153c831b5