From affb722b23deb1401ffd5153368ebaad791e8533 Mon Sep 17 00:00:00 2001
From: Christoffer Lerno <christoffer@aegik.com>
Date: Mon, 23 Jun 2025 14:45:16 +0200
Subject: [PATCH] @tag didn't work with members #2236.

---
 releasenotes.md                     |  3 ++-
 src/compiler/sema_decls.c           |  1 +
 test/test_suite/union/member_tag.c3 | 13 +++++++++++++
 3 files changed, 16 insertions(+), 1 deletion(-)
 create mode 100644 test/test_suite/union/member_tag.c3

diff --git a/releasenotes.md b/releasenotes.md
index 3d4c247a2..f011644cc 100644
--- a/releasenotes.md
+++ b/releasenotes.md
@@ -61,7 +61,8 @@
 - Overload resolution fixes to inline typedef #2226.
 - `math::overflow_*` wrappers incorrectly don't allow distinct integers #2221.
 - Compiler segfault when using distinct type in attribute imported from other module #2234.
-- Assert casting bitstruct to short/char #2237
+- Assert casting bitstruct to short/char #2237.
+- @tag didn't work with members #2236.
 
 ### Stdlib changes
 - Deprecate `String.is_zstr` and `String.quick_zstr` #2188.
diff --git a/src/compiler/sema_decls.c b/src/compiler/sema_decls.c
index 3c6d536c0..7981bfed7 100755
--- a/src/compiler/sema_decls.c
+++ b/src/compiler/sema_decls.c
@@ -3594,6 +3594,7 @@ static bool sema_analyse_attributes_inner(SemaContext *context, ResolvedAttrData
 static bool sema_analyse_attributes(SemaContext *context, Decl *decl, Attr **attrs, AttributeDomain domain,
 									bool *erase_decl)
 {
+	if (decl->resolved_attributes) return true;
 	ResolvedAttrData data = { .tags = NULL, .overload = INVALID_SPAN };
 	if (!sema_analyse_attributes_inner(context, &data, decl, attrs, domain, NULL, erase_decl)) return false;
 	if (*erase_decl) return true;
diff --git a/test/test_suite/union/member_tag.c3 b/test/test_suite/union/member_tag.c3
new file mode 100644
index 000000000..acbca38bc
--- /dev/null
+++ b/test/test_suite/union/member_tag.c3
@@ -0,0 +1,13 @@
+struct Test
+{
+	union a @tag("a", 1)
+	{
+		int x;
+	}
+}
+
+fn int main(String[] args)
+{
+	$assert(Test.a.has_tagof("a")); // Error: Compile time assert failed.
+	return 0;
+}
\ No newline at end of file