fix: Fix assertion when assigning an object literal to an interface (#2197)

Author: romdotdog

src/compiler.ts

@@ -8631,6 +8631,13 @@ export class Compiler extends DiagnosticEmitter {
     }
     var classType = classReference.type;
     this.currentType = classType.nonNullableType;
+    if (classReference.kind == ElementKind.INTERFACE) {
+      this.error(
+        DiagnosticCode.Not_implemented_0,
+        expression.range, "Interface hidden classes"
+      );
+      return module.unreachable();
+    }
     if (classReference.is(CommonFlags.ABSTRACT)) {
       this.error(
         DiagnosticCode.Cannot_create_an_instance_of_an_abstract_class,

tests/compiler/issues/2085.json

@@ -0,0 +1,8 @@
+{
+  "asc_flags": [
+  ],
+  "stderr": [
+    "AS100: Not implemented: Interface hidden classes",
+    "EOF"
+  ]
+}

tests/compiler/issues/2085.ts

@@ -0,0 +1,3 @@
+interface Foo {}
+const foo: Foo = {};
+ERROR("EOF");