operator<< on a DiagnosticBuilder should *always* output exactly one thing.
Null template arguments are bad, but they're better than crashing with an
argument mismatch.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@110312 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/TemplateBase.cpp b/lib/AST/TemplateBase.cpp
index 02e6488..351aebe 100644
--- a/lib/AST/TemplateBase.cpp
+++ b/lib/AST/TemplateBase.cpp
@@ -152,7 +152,9 @@
const TemplateArgument &Arg) {
switch (Arg.getKind()) {
case TemplateArgument::Null:
- return DB;
+ // This is bad, but not as bad as crashing because of argument
+ // count mismatches.
+ return DB << "(null template argument)";
case TemplateArgument::Type:
return DB << Arg.getAsType();