Avoid find_tycon panic if datacon is not in scope
When using TH to splice expressions involving record field construction,
the parent datacon may not be in scope. We shouldn't panic about this,
because we will be renaming Exact RdrNames which don't require any
disambiguation.
Reviewers: austin, bgamari
Reviewed By: bgamari
Differential Revision: https://phabricator.haskell.org/D2321
GHC Trac Issues: #12130
Origin: upstream, https://git.haskell.org/ghc.git/commitdiff/
694e0f3a08030
Gbp-Pq: Name find-tycon-panic
StgCmmPrim: Add missing MO_WriteBarrier
StgCmmPrim: Add missing MO_WriteBarrier
Test Plan: Good question
Reviewers: austin, trommler, simonmar, rrnewton
Reviewed By: simonmar
Subscribers: RyanGlScott, thomie
Differential Revision: https://phabricator.haskell.org/D2495
GHC Trac Issues: #12469
(cherry picked from commit
d40d6df74a9fca382a84709ac9bc862897fbec18)
Gbp-Pq: Name add-missing-MO_WriteBarrier