scala/scala — pull request #1606 by retronym (2012-11-10 12:16:16+00:00)
Title: SI-6646 Fix regression in for desugaring.

The early check in the parser of pattern irrefutability,
added in c82ecab, failed to consider InitCaps and
`backquoted` identifiers.

Review by @paulp

@adriaanm should take a look to judge the severity.

Given that it's a silent killer, I've formed an opinion that is
expressed with the target branch of this PR.