[modules][PATCH] Teach the ASTDeclReader to update the exception specs of the deserialized decl's redecl chain.

Vassil Vassilev vasil.georgiev.vasilev at cern.ch
Thu Nov 6 04:23:28 PST 2014

Hi Richard,
   I am attaching the patch we discussed at the dev meeting. Still 
haven't found small reproducer...
   The issue appears to stem from the fact that module A contains only a 
forward declaration of a function and it exception spec cannot be 
computed. In module B is the definition with computed exception spec, 
which gets deserialized after the one in module A. This patch teaches 
the ASTDeclReader to update all the exception specs of the previous 
decls to the current one.

   Could you review, please?
Many thanks,
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