From 7d0695a71a9ecd166045ec05143fb8c66e6d1c58 Mon Sep 17 00:00:00 2001
From: Alexander Medvednikov <alexander@medvednikov.com>
Date: Thu, 26 Feb 2026 19:41:40 +0300
Subject: [PATCH] checker: fix "Builder Error" when defining field `gg
 gg.Context = unsafe {nil}` not as a pointer (fixes #15201)

---
 ...uct_non_ptr_struct_field_nil_default_value_err.out |  7 +++++++
 ...ruct_non_ptr_struct_field_nil_default_value_err.vv | 11 +++++++++++
 2 files changed, 18 insertions(+)
 create mode 100644 vlib/v/checker/tests/struct_non_ptr_struct_field_nil_default_value_err.out
 create mode 100644 vlib/v/checker/tests/struct_non_ptr_struct_field_nil_default_value_err.vv

diff --git a/vlib/v/checker/tests/struct_non_ptr_struct_field_nil_default_value_err.out b/vlib/v/checker/tests/struct_non_ptr_struct_field_nil_default_value_err.out
new file mode 100644
index 000000000..0e6e647e9
--- /dev/null
+++ b/vlib/v/checker/tests/struct_non_ptr_struct_field_nil_default_value_err.out
@@ -0,0 +1,7 @@
+vlib/v/checker/tests/struct_non_ptr_struct_field_nil_default_value_err.vv:5:12: error: cannot assign `nil` to a non-pointer field
+    3 | struct Game {
+    4 | mut:
+    5 |     gg        Context = unsafe { nil }
+      |               ~~~~~~~
+    6 |     something int
+    7 | }
diff --git a/vlib/v/checker/tests/struct_non_ptr_struct_field_nil_default_value_err.vv b/vlib/v/checker/tests/struct_non_ptr_struct_field_nil_default_value_err.vv
new file mode 100644
index 000000000..57fbcd2bc
--- /dev/null
+++ b/vlib/v/checker/tests/struct_non_ptr_struct_field_nil_default_value_err.vv
@@ -0,0 +1,11 @@
+struct Context {}
+
+struct Game {
+mut:
+	gg        Context = unsafe { nil }
+	something int
+}
+
+fn main() {
+	_ := &Game{}
+}
-- 
2.39.5