Correctly reject interface methods type and ptr.

releasenotes.md

@@ -12,6 +12,7 @@
 ### Fixes
 - mkdir/rmdir would not work properly with substring paths on non-windows platforms.
 - Hex string formatter check incorrectly rejected slices.
+- Correctly reject interface methods `type` and `ptr`.
 
 ### Stdlib changes
 

src/compiler/sema_decls.c

@@ -923,8 +923,13 @@ static bool sema_analyse_interface(SemaContext *context, Decl *decl, bool *erase
 	{
 		RETRY:;
 		Decl *method = functions[i];
+		if (method->name == kw_ptr || method->name == kw_type)
+		{
+			RETURN_SEMA_ERROR(method, "The method name '%s' would shadow the built-in property '.%s', "
+							 "please select a different name.", method->name, method->name);
+		}
 		// The method might have been resolved earlier, if so we either exit or go to the next.
-		// This might happen for example if it was resolved using $checks
+		// This might happen for example if it was resolved using $defined
 		if (method->resolve_status == RESOLVE_DONE)
 		{
 			if (!decl_ok(method)) return false;

test/test_suite/any/interface_name_shadow.c3

@@ -0,0 +1,15 @@
+import std::io;
+
+interface Abc
+{
+	fn void type(); // #error: would shadow the built-in property '.type'
+}
+
+interface Bcd
+{
+	fn void ptr(); // #error: would shadow the built-in property '.ptr'
+}
+
+fn void main()
+{
+}