[Sema] Diagnose references to unbound arrays in function definitions

A [*] is only allowed in a declaration for a function, not in its
definition.  We didn't correctly recurse on reference types while
looking for it, causing us to crash in CodeGen instead of rejecting it.

llvm-svn: 234528

1 files changed, 3 insertions, 0 deletions

diff --git a/clang/test/SemaCXX/vla.cpp b/clang/test/SemaCXX/vla.cpp
index dae6450553a..6efb648e786 100644
--- a/clang/test/SemaCXX/vla.cpp
+++ b/clang/test/SemaCXX/vla.cpp
@@ -17,3 +17,6 @@ namespace PR18581 {
     incomplete c[n]; // expected-error {{incomplete}}
   }
 }
+
+void pr23151(int (&)[*]) { // expected-error {{variable length array must be bound in function definition}}
+}