mozilla/rust — pull request #11644 by huonw (2014-01-18 09:18:25+00:00)
Title: syntax::ext: replace span_fatal with span_err in many places.

This means that compilation continues for longer, and so we can see more
errors per compile. This is mildly more user-friendly because it stops
users having to run rustc n times to see n macro errors: just run it
once to see all of them.