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-rw-r--r--lib/Sema/SemaTemplate.cpp7
1 files changed, 5 insertions, 2 deletions
diff --git a/lib/Sema/SemaTemplate.cpp b/lib/Sema/SemaTemplate.cpp
index 91466fa904..5633582d67 100644
--- a/lib/Sema/SemaTemplate.cpp
+++ b/lib/Sema/SemaTemplate.cpp
@@ -6431,8 +6431,11 @@ ExprResult Sema::CheckTemplateArgument(NonTypeTemplateParmDecl *Param,
}
// If either the parameter has a dependent type or the argument is
- // type-dependent, there's nothing we can check now.
- if (ParamType->isDependentType() || Arg->isTypeDependent()) {
+ // type-dependent, there's nothing we can check now. The argument only
+ // contains an unexpanded pack during partial ordering, and there's
+ // nothing more we can check in that case.
+ if (ParamType->isDependentType() || Arg->isTypeDependent() ||
+ Arg->containsUnexpandedParameterPack()) {
// Force the argument to the type of the parameter to maintain invariants.
auto *PE = dyn_cast<PackExpansionExpr>(Arg);
if (PE)