Regression: Generic type could not be found in lambda inside macro #2853

src/compiler/sema_expr.c

@@ -10947,6 +10947,11 @@ static inline bool sema_expr_analyse_lambda(SemaContext *context, Type *target_t
 			decl->var.is_read = true;
 		}
 		decl_flatten(decl)->is_external_visible = true;
+		if (context->generic_instance)
+		{
+			decl->is_templated = true;
+			decl->instance_id = declid(context->generic_instance);
+		}
 		vec_add(unit->module->lambdas_to_evaluate, decl);
 	}
 	else

test/test_suite/generic/generic_lambda.c3t

@@ -0,0 +1,26 @@
+// #target: macos-x64
+module main;
+import foo;
+
+fn void main()
+{
+	foo::test{int}();
+}
+
+module foo <Type>;
+
+macro void test()
+{
+	var func = fn Type* ()
+	{
+		return mem::new(Type);
+	};
+}
+
+/* #expect: foo.ll
+
+define weak ptr @"foo.test{int}$lambda1"() #0 {
+entry:
+  %0 = call ptr @std.core.mem.calloc(i64 4) #1
+  ret ptr %0
+}