tree f20e6e06adf0dd523bee9ff57db048f49a2ee7fe
parent 0396f466978d65789eca85b2738e9df53adc78f5
author Douglas Gregor <dgregor@apple.com> 1268979126 +0000
committer Douglas Gregor <dgregor@apple.com> 1268979126 +0000

Fix a longstanding (but previously unknown) bug in the lazy
deserialization of precompiled headers, where the deserialization of
the source location entry for a buffer (e.g., macro instantiation
scratch space) would overwrite a one-element FileID cache in the
source manager. When tickled at the wrong time, we would return the
wrong decomposed source location and eventually cause c-index-test to
crash.

Found by dumb luck. It's amazing this hasn't shown up before.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@98940 91177308-0d34-0410-b5e6-96231b3b80d8