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-rw-r--r--lib/Frontend/ASTMerge.cpp6
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/Frontend/ASTMerge.cpp b/lib/Frontend/ASTMerge.cpp
index e916e20065..cbaa6a3034 100644
--- a/lib/Frontend/ASTMerge.cpp
+++ b/lib/Frontend/ASTMerge.cpp
@@ -44,6 +44,12 @@ void ASTMergeAction::ExecuteAction() {
if (!Unit)
continue;
+ // Reset the argument -> string function so that it has the AST
+ // context we want, since the Sema object created by
+ // LoadFromPCHFile will override it.
+ CI.getDiagnostics().SetArgToStringFn(&FormatASTNodeDiagnosticArgument,
+ &CI.getASTContext());
+
ASTImporter Importer(CI.getDiagnostics(),
CI.getASTContext(),
CI.getFileManager(),