Alp Toker c28beb254d CommandLine: bail out when options get multiply registered ...

These errors are strictly unrecoverable and indicate serious issues such as
conflicting option names or an incorrectly linked LLVM distribution.

With this change, the errors actually get detected so tests don't pass
silently.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211260 91177308-0d34-0410-b5e6-96231b3b80d8

2014-06-19 07:25:25 +00:00

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