[DeclPrinter] Fix two cases that crash clang -ast-print.
Both are related to handling anonymous structures.
* clang didn't handle () around an anonymous struct variable.
* clang also crashed on syntax errors that could lead to other
syntactic constructs following the declaration of an
anonymous struct. While the code is invalid, that's not
a good reason to panic compiler.
Differential Revision: https://reviews.llvm.org/D41788
llvm-svn: 322742
diff --git a/clang/test/SemaCXX/ast-print-crash.cpp b/clang/test/SemaCXX/ast-print-crash.cpp
new file mode 100644
index 0000000..c108f66
--- /dev/null
+++ b/clang/test/SemaCXX/ast-print-crash.cpp
@@ -0,0 +1,12 @@
+// RUN: not %clang_cc1 -triple %ms_abi_triple -ast-print %s -std=gnu++11 \
+// RUN: | FileCheck %s
+
+// The test compiles a file with a syntax error which used to cause a crash with
+// -ast-print. Compilation fails due to the syntax error, but compiler should
+// not crash and print out whatever it manager to parse.
+
+// CHECK: struct {
+// CHECK-NEXT: } dont_crash_on_syntax_error;
+// CHECK-NEXT: decltype(nullptr) p;
+struct {
+} dont_crash_on_syntax_error /* missing ; */ decltype(nullptr) p;