Merge remote-tracking branch 'osa1/port_16449_ghc_8_8' into wip/ghc-8.8-merges

Authored by bgamari on Tue, Jun 4, 5:02 PM.

Description

Merge remote-tracking branch 'osa1/port_16449_ghc_8_8' into wip/ghc-8.8-merges

Merged Changes

CommitAuthorDetailsCommitted
c26461fcab27osa1/ghc-builders
Fix rewriting invalid shifts to errors 
Jun 3