PR20844: If we fail to list-initialize a reference, map to the referenced type

before retrying the initialization to produce diagnostics. Otherwise, we may
fail to produce any diagnostics, and silently produce invalid AST in a -Asserts
build. Also add a note to this codepath to make it more clear why we were
trying to create a temporary.

llvm-svn: 217197

1 files changed, 6 insertions, 0 deletions

diff --git a/clang/test/SemaCXX/cxx0x-initializer-references.cpp b/clang/test/SemaCXX/cxx0x-initializer-references.cpp
index 9096c8a1c2d..d1a9ed30076 100644
--- a/clang/test/SemaCXX/cxx0x-initializer-references.cpp
+++ b/clang/test/SemaCXX/cxx0x-initializer-references.cpp
@@ -118,3 +118,9 @@ namespace inner_init {
   F f2 { { 0 } }; // expected-error {{chosen constructor is explicit}}
   F f3 { { { 0 } } }; // expected-error {{chosen constructor is explicit}}
 }
+
+namespace PR20844 {
+  struct A {};
+  struct B { operator A&(); } b;
+  A &a{b}; // expected-error {{excess elements}} expected-note {{in initialization of temporary of type 'PR20844::A'}}
+}