From 11ca2d51b4c7dfe8bb914f6256182a39c966ccbd Mon Sep 17 00:00:00 2001
From: Benoit Giannangeli <giann008@gmail.com>
Date: Wed, 3 Jul 2024 14:42:46 +0200
Subject: [PATCH] fix(fiber): Main fiber can't be cancelled

---
 src/builtin/fiber.zig | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/builtin/fiber.zig b/src/builtin/fiber.zig
index 5a049370..21383847 100644
--- a/src/builtin/fiber.zig
+++ b/src/builtin/fiber.zig
@@ -17,6 +17,11 @@ pub fn over(ctx: *NativeCtx) c_int {
 pub fn cancel(ctx: *NativeCtx) c_int {
     const self = ObjFiber.cast(ctx.vm.peek(0).obj()).?;
 
+    // Main fiber can't be cancelled
+    if (self.fiber.parent_fiber == null) {
+        return 0;
+    }
+
     self.fiber.status = .Over;
 
     return 0;