From 8b47317ec7299091c0120c89d6ae15c4e6ef6354 Mon Sep 17 00:00:00 2001
From: Christoffer Lerno <christoffer@aegik.com>
Date: Thu, 3 Jul 2025 13:11:12 +0200
Subject: [PATCH] Fix issue with labelled break inside of a $switch.

---
 releasenotes.md                                 |  1 +
 src/compiler/sema_stmts.c                       |  5 +++--
 .../compile_time/compile_time_with_break.c3t    | 17 +++++++++++++++++
 3 files changed, 21 insertions(+), 2 deletions(-)
 create mode 100644 test/test_suite/compile_time/compile_time_with_break.c3t

diff --git a/releasenotes.md b/releasenotes.md
index 5357ad768..9987eb259 100644
--- a/releasenotes.md
+++ b/releasenotes.md
@@ -17,6 +17,7 @@
 - Switch case with const non-int / enum would be treated as ints and crash. #2263
 - Missing bounds check on upper bound with const ranges `foo[1:3]`.
 - Check up the hierarchy when considering if an interface cast is valid #2267.
+- Fix issue with labelled break inside of a $switch.
 
 ### Stdlib changes
 
diff --git a/src/compiler/sema_stmts.c b/src/compiler/sema_stmts.c
index ef2264995..4124ffa73 100644
--- a/src/compiler/sema_stmts.c
+++ b/src/compiler/sema_stmts.c
@@ -2224,9 +2224,10 @@ static inline bool sema_analyse_then_overwrite(SemaContext *context, Ast *statem
 		return true;
 	}
 	Ast *last = NULL;
+	statement->ast_kind = AST_NOP_STMT;
 	AstId next = statement->next;
-	*statement = *astptr(replacement);
-	AstId current = astid(statement);
+	statement->next = replacement;
+	AstId current = replacement;
 	ASSERT(current);
 	while (current)
 	{
diff --git a/test/test_suite/compile_time/compile_time_with_break.c3t b/test/test_suite/compile_time/compile_time_with_break.c3t
new file mode 100644
index 000000000..8405430c5
--- /dev/null
+++ b/test/test_suite/compile_time/compile_time_with_break.c3t
@@ -0,0 +1,17 @@
+enum Test
+{
+    FOO,
+}
+
+fn int main()
+{
+	int v;
+    $switch (Test.FOO):
+    $case FOO:
+        if START: (v < 5)
+        {
+            if (v > 3) break START;
+        }
+    $endswitch
+    return 0;
+}
\ No newline at end of file