From: Richard Smith <richard-llvm@metafoo.co.uk>
Date: Tue, 20 Feb 2018 23:47:12 +0000 (+0000)
Subject: Fix assert when template argument deduction's original call arg checking triggers... 
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=799049fee5238acec7f3d737ea968ede1978cfe6;p=clang

Fix assert when template argument deduction's original call arg checking triggers class template instantiation.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@325646 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Sema/SemaTemplateDeduction.cpp b/lib/Sema/SemaTemplateDeduction.cpp
index d09cf9933e..53fa8745ee 100644
--- a/lib/Sema/SemaTemplateDeduction.cpp
+++ b/lib/Sema/SemaTemplateDeduction.cpp
@@ -3084,7 +3084,7 @@ CheckOriginalCallArgDeduction(Sema &S, TemplateDeductionInfo &Info,
     return Sema::TDK_Success;
 
   if (A->isRecordType() && isSimpleTemplateIdType(OriginalParamType) &&
-      S.IsDerivedFrom(SourceLocation(), A, DeducedA))
+      S.IsDerivedFrom(Info.getLocation(), A, DeducedA))
     return Sema::TDK_Success;
 
   return Failed();
diff --git a/test/SemaTemplate/temp_arg_pack.cpp b/test/SemaTemplate/temp_arg_pack.cpp
new file mode 100644
index 0000000000..b79dca78bc
--- /dev/null
+++ b/test/SemaTemplate/temp_arg_pack.cpp
@@ -0,0 +1,8 @@
+// RUN: %clang_cc1 -verify %s
+
+namespace deduce_pack_non_pack {
+  template <typename...> class A;
+  template <typename> struct C {};
+  template <typename T> void g(C<A<T>>); // expected-note {{candidate template ignored: deduced type 'C<A<[...], (no argument)>>' of 1st parameter does not match adjusted type 'C<A<[...], int>>' of argument [with T = bool]}}
+  void h(C<A<bool, int>> &x) { g(x); } // expected-error {{no matching function}}
+}