From 4652e4d49cb2d8966f5d1493a0e2b7eae7f091b5 Mon Sep 17 00:00:00 2001
From: CreeperFace <165158232+dy-tea@users.noreply.github.com>
Date: Wed, 17 Dec 2025 17:27:17 +0000
Subject: [PATCH] checker: ensure type of global exists (fix #25910) (#25998)

---
 vlib/v/checker/checker.v                            | 5 +----
 vlib/v/checker/tests/globals/nested_unknown_typ.out | 5 +++++
 vlib/v/checker/tests/globals/nested_unknown_typ.vv  | 5 +++++
 3 files changed, 11 insertions(+), 4 deletions(-)
 create mode 100644 vlib/v/checker/tests/globals/nested_unknown_typ.out
 create mode 100644 vlib/v/checker/tests/globals/nested_unknown_typ.vv

diff --git a/vlib/v/checker/checker.v b/vlib/v/checker/checker.v
index ba4fbcd5f..7c4b93d12 100644
--- a/vlib/v/checker/checker.v
+++ b/vlib/v/checker/checker.v
@@ -2604,10 +2604,7 @@ fn (mut c Checker) global_decl(mut node ast.GlobalDecl) {
 			// add global to exports for duplicate check
 			c.table.export_names[field.name] = field.name
 		}
-		sym := c.table.sym(field.typ)
-		if sym.kind == .placeholder {
-			c.error('unknown type `${sym.name}`', field.typ_pos)
-		}
+		c.ensure_type_exists(field.typ, field.typ_pos)
 		if field.has_expr {
 			if field.expr is ast.AnonFn && field.name == 'main' {
 				c.error('the `main` function is the program entry point, cannot redefine it',
diff --git a/vlib/v/checker/tests/globals/nested_unknown_typ.out b/vlib/v/checker/tests/globals/nested_unknown_typ.out
new file mode 100644
index 000000000..94a91a336
--- /dev/null
+++ b/vlib/v/checker/tests/globals/nested_unknown_typ.out
@@ -0,0 +1,5 @@
+vlib/v/checker/tests/globals/nested_unknown_typ.vv:5:13: error: unknown type `StructS`
+    3 |
+    4 | @[markused]
+    5 | __global ga []?StructS
+      |             ^
diff --git a/vlib/v/checker/tests/globals/nested_unknown_typ.vv b/vlib/v/checker/tests/globals/nested_unknown_typ.vv
new file mode 100644
index 000000000..fa14b9060
--- /dev/null
+++ b/vlib/v/checker/tests/globals/nested_unknown_typ.vv
@@ -0,0 +1,5 @@
+@[has_globals]
+module main
+
+@[markused]
+__global ga []?StructS
-- 
2.39.5