ziglang
diff --git a/‎lib/std/Io/Threaded.zig‎
Lines changed: 1 addition & 1 deletion b/‎lib/std/Io/Threaded.zig‎
Lines changed: 1 addition & 1 deletion
@@ -453,7 +453,7 @@ fn async(
     start: *const fn (context: *const anyopaque, result: *anyopaque) void,
 ) ?*Io.AnyFuture {
     const t: *Threaded = @ptrCast(@alignCast(userdata));
-    if (t.cpu_count == 1) {
+    if (t.cpu_count == 1 or builtin.single_threaded) {
         start(context.ptr, result.ptr);
         return null;
     }
Original file line number	Diff line number	Diff line change
`@@ -453,7 +453,7 @@ fn async(`
`453`	`453`	`start: const fn (context: const anyopaque, result: *anyopaque) void,`
`454`	`454`	`) ?*Io.AnyFuture {`
`455`	`455`	`const t: *Threaded = @ptrCast(@alignCast(userdata));`
`456`		`- if (t.cpu_count == 1) {`
	`456`	`+ if (t.cpu_count == 1 or builtin.single_threaded) {`
`457`	`457`	`start(context.ptr, result.ptr);`
`458`	`458`	`return null;`
`459`	`459`	`}`