r294362 - [ASTReader] Improve ReadASTBlock error message when module not available

[Bruno Cardoso Lopes via cfe-commits]

Author: bruno
Date: Tue Feb  7 15:55:02 2017
New Revision: 294362

URL: http://llvm.org/viewvc/llvm-project?rev=294362&view=rev
Log:
[ASTReader] Improve ReadASTBlock error message when module not available

Point to the PCM file that could not be found.

rdar://problem/30381981

Modified:
    cfe/trunk/lib/Serialization/ASTReader.cpp

Modified: cfe/trunk/lib/Serialization/ASTReader.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Serialization/ASTReader.cpp?rev=294362&r1=294361&r2=294362&view=diff
==============================================================================
--- cfe/trunk/lib/Serialization/ASTReader.cpp (original)
+++ cfe/trunk/lib/Serialization/ASTReader.cpp Tue Feb  7 15:55:02 2017
@@ -2965,7 +2965,10 @@ ASTReader::ReadASTBlock(ModuleFile &F, u
         Data += Len;
         ModuleFile *OM = ModuleMgr.lookup(Name);
         if (!OM) {
-          Error("SourceLocation remap refers to unknown module");
+          std::string Msg =
+              "SourceLocation remap refers to unknown module, cannot find ";
+          Msg.append(Name);
+          Error(Msg);
           return Failure;
         }