Avoid crash when dumping NULL Type as JSON.

Patch by Bert Belder.

llvm-svn: 370401

2 files changed, 78 insertions, 1 deletions

diff --git a/clang/test/AST/ast-dump-types-json.cpp b/clang/test/AST/ast-dump-types-json.cpp
index 8b9bdd5fe66..d25aea8d85b 100644
--- a/clang/test/AST/ast-dump-types-json.cpp
+++ b/clang/test/AST/ast-dump-types-json.cpp
@@ -20,6 +20,11 @@ typedef int T::*TestMemberDataPointerType;
 
 typedef int TestQualTypePrinting(const char* c);
 
+typedef int TestUsingShadowDeclType;
+namespace TestNamespaceWithUsingShadowType {
+using ::TestUsingShadowDeclType;
+}
+
 // NOTE: CHECK lines have been autogenerated by gen_ast_dump_json_test.py
 
 
@@ -422,3 +427,75 @@ typedef int TestQualTypePrinting(const char* c);
 // CHECK-NEXT:   }
 // CHECK-NEXT:  ]
 // CHECK-NEXT: }
+
+// CHECK:  "kind": "NamespaceDecl",
+// CHECK-NEXT:  "loc": {
+// CHECK-NEXT:   "file": "{{.*}}",
+// CHECK-NEXT:   "line": 24,
+// CHECK-NEXT:   "col": 11,
+// CHECK-NEXT:   "tokLen": 32
+// CHECK-NEXT:  },
+// CHECK-NEXT:  "range": {
+// CHECK-NEXT:   "begin": {
+// CHECK-NEXT:    "col": 1,
+// CHECK-NEXT:    "tokLen": 9
+// CHECK-NEXT:   },
+// CHECK-NEXT:   "end": {
+// CHECK-NEXT:    "line": 26,
+// CHECK-NEXT:    "col": 1,
+// CHECK-NEXT:    "tokLen": 1
+// CHECK-NEXT:   }
+// CHECK-NEXT:  },
+// CHECK-NEXT:  "name": "TestNamespaceWithUsingShadowType",
+// CHECK-NEXT:  "inner": [
+// CHECK-NEXT:   {
+// CHECK-NEXT:    "id": "0x{{.*}}",
+// CHECK-NEXT:    "kind": "UsingDecl",
+// CHECK-NEXT:    "loc": {
+// CHECK-NEXT:     "line": 25,
+// CHECK-NEXT:     "col": 9,
+// CHECK-NEXT:     "tokLen": 23
+// CHECK-NEXT:    },
+// CHECK-NEXT:    "range": {
+// CHECK-NEXT:     "begin": {
+// CHECK-NEXT:      "col": 1,
+// CHECK-NEXT:      "tokLen": 5
+// CHECK-NEXT:     },
+// CHECK-NEXT:     "end": {
+// CHECK-NEXT:      "col": 9,
+// CHECK-NEXT:      "tokLen": 23
+// CHECK-NEXT:     }
+// CHECK-NEXT:    },
+// CHECK-NEXT:    "name": "::TestUsingShadowDeclType"
+// CHECK-NEXT:   },
+// CHECK-NEXT:   {
+// CHECK-NEXT:    "id": "0x{{.*}}",
+// CHECK-NEXT:    "kind": "UsingShadowDecl",
+// CHECK-NEXT:    "loc": {
+// CHECK-NEXT:     "col": 9,
+// CHECK-NEXT:     "tokLen": 23
+// CHECK-NEXT:    },
+// CHECK-NEXT:    "range": {
+// CHECK-NEXT:     "begin": {
+// CHECK-NEXT:      "col": 9,
+// CHECK-NEXT:      "tokLen": 23
+// CHECK-NEXT:     },
+// CHECK-NEXT:     "end": {
+// CHECK-NEXT:      "col": 9,
+// CHECK-NEXT:      "tokLen": 23
+// CHECK-NEXT:     }
+// CHECK-NEXT:    },
+// CHECK-NEXT:    "isImplicit": true,
+// CHECK-NEXT:    "target": {
+// CHECK-NEXT:     "id": "0x{{.*}}",
+// CHECK-NEXT:     "kind": "TypedefDecl",
+// CHECK-NEXT:     "name": "TestUsingShadowDeclType"
+// CHECK-NEXT:    },
+// CHECK-NEXT:    "inner": [
+// CHECK-NEXT:     {
+// CHECK-NEXT:      "id": "0x0"
+// CHECK-NEXT:     }
+// CHECK-NEXT:    ]
+// CHECK-NEXT:   }
+// CHECK-NEXT:  ]
+// CHECK-NEXT: }
diff --git a/clang/test/AST/gen_ast_dump_json_test.py b/clang/test/AST/gen_ast_dump_json_test.py
index 975039ead27..f1c9801fb10 100644
--- a/clang/test/AST/gen_ast_dump_json_test.py
+++ b/clang/test/AST/gen_ast_dump_json_test.py
@@ -20,7 +20,7 @@ def normalize(dict_var):
                     normalize(e)
         elif type(v) is unicode:
             st = v.encode('utf-8')
-            if re.match(r"0x[0-9A-Fa-f]+", v):
+            if v != "0x0" and re.match(r"0x[0-9A-Fa-f]+", v):
                 dict_var[k] = u'0x{{.*}}'
             elif os.path.isfile(v):
                 dict_var[k] = u'{{.*}}'