[PATCH] D50949: Handle lambdas in .pcm [de]serialization

[Steve O'Brien via Phabricator via cfe-commits]

elsteveogrande created this revision.
elsteveogrande added a reviewer: rsmith.
Herald added a subscriber: cfe-commits.

- Drop a couple of asserts preventing this (in the merge function)
- Merge all fields as usual
- Ensure select fields match, for ODR checking
- add previously-failing test to merge-lambdas.cpp

Test case by Andrew Gallagher

Test Plan: Andrew's repro from https://bugs.llvm.org/show_bug.cgi?id=38531 broke before this change, works after.


Repository:
  rC Clang

https://reviews.llvm.org/D50949

Files:
  include/clang/AST/LambdaCapture.h
  lib/Serialization/ASTReaderDecl.cpp
  test/Modules/merge-lambdas.cpp

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