fix(37165): Cannot read property 'flags' of undefined

src/compiler/checker.ts

@@ -10398,7 +10398,10 @@ namespace ts {
                         return symbol;
                     }
                 }
-                return getPropertyOfObjectType(globalObjectType, name);
+                if (globalObjectType) {
+                    return getPropertyOfObjectType(globalObjectType, name);
+                }
+                return undefined;
             }
             if (type.flags & TypeFlags.UnionOrIntersection) {
                 return getPropertyOfUnionOrIntersectionType(<UnionOrIntersectionType>type, name);

tests/baselines/reference/importNonExistentDeclaration.errors.txt

@@ -0,0 +1,22 @@
+tests/cases/compiler/bar.d.ts(1,10): error TS2305: Module '"./foo"' has no exported member 'Bar'.
+
+
+==== tests/cases/compiler/foo.d.ts (0 errors) ====
+    export = Foo;
+    export as namespace Foo;
+
+    declare namespace Foo {
+        function foo();
+    }
+
+    declare global {
+        namespace Bar {}
+    }
+
+==== tests/cases/compiler/bar.d.ts (1 errors) ====
+    import { Bar } from './foo';
+             ~~~
+!!! error TS2305: Module '"./foo"' has no exported member 'Bar'.
+    export = Bar;
+    export as namespace Bar;
+

tests/baselines/reference/importNonExistentDeclaration.symbols

@@ -0,0 +1,31 @@
+=== tests/cases/compiler/foo.d.ts ===
+export = Foo;
+>Foo : Symbol(Foo, Decl(foo.d.ts, 1, 24))
+
+export as namespace Foo;
+>Foo : Symbol(Foo, Decl(foo.d.ts, 0, 13))
+
+declare namespace Foo {
+>Foo : Symbol(Foo, Decl(foo.d.ts, 1, 24))
+
+    function foo();
+>foo : Symbol(foo, Decl(foo.d.ts, 3, 23))
+}
+
+declare global {
+>global : Symbol(global, Decl(foo.d.ts, 5, 1))
+
+    namespace Bar {}
+>Bar : Symbol(Bar, Decl(foo.d.ts, 7, 16))
+}
+
+=== tests/cases/compiler/bar.d.ts ===
+import { Bar } from './foo';
+>Bar : Symbol(Bar, Decl(bar.d.ts, 0, 8))
+
+export = Bar;
+>Bar : Symbol(Bar, Decl(bar.d.ts, 0, 8))
+
+export as namespace Bar;
+>Bar : Symbol(Bar, Decl(bar.d.ts, 1, 13))
+

tests/baselines/reference/importNonExistentDeclaration.types

@@ -0,0 +1,30 @@
+=== tests/cases/compiler/foo.d.ts ===
+export = Foo;
+>Foo : typeof Foo
+
+export as namespace Foo;
+>Foo : typeof Foo
+
+declare namespace Foo {
+>Foo : typeof Foo
+
+    function foo();
+>foo : () => any
+}
+
+declare global {
+>global : any
+
+    namespace Bar {}
+}
+
+=== tests/cases/compiler/bar.d.ts ===
+import { Bar } from './foo';
+>Bar : any
+
+export = Bar;
+>Bar : any
+
+export as namespace Bar;
+>Bar : any
+

tests/cases/compiler/importNonExistentDeclaration.ts

@@ -0,0 +1,16 @@
+// @filename: foo.d.ts
+export = Foo;
+export as namespace Foo;
+
+declare namespace Foo {
+    function foo();
+}
+
+declare global {
+    namespace Bar {}
+}
+
+// @filename: bar.d.ts
+import { Bar } from './foo';
+export = Bar;
+export as namespace Bar;