From 8ba4c90bc406d4ac32928c0d905b8073575359b6 Mon Sep 17 00:00:00 2001
From: Anton-4 <17049058+Anton-4@users.noreply.github.com>
Date: Sat, 16 Aug 2025 20:10:04 +0200
Subject: [PATCH] Fix stack overflows

Tokio uses a smaller stack size for threads, I made it use the default stack size for a program instead. Fixes https://github.com/roc-lang/unicode/issues/28
---
 crates/language_server/src/server.rs | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/crates/language_server/src/server.rs b/crates/language_server/src/server.rs
index 7be367b265..f99eebfea2 100644
--- a/crates/language_server/src/server.rs
+++ b/crates/language_server/src/server.rs
@@ -371,10 +371,25 @@ where
     }
 }
 
-#[tokio::main]
-async fn main() {
+fn main() {
     env_logger::Builder::from_env("ROCLS_LOG").init();
 
+    // Tokio uses a smaller stack size for threads by default,
+    // this can lead to stack overflows that don't show up with the roc release bin!
+    let stack_size = 8 * 1024 * 1024; // 8MB
+
+    // Build a custom Tokio runtime with configured thread stack size
+    let runtime = tokio::runtime::Builder::new_multi_thread()
+        .thread_stack_size(stack_size)
+        .enable_all()
+        .build()
+        .expect("Failed to create Tokio runtime");
+
+    // Run the async main function on our custom runtime
+    runtime.block_on(async_main());
+}
+
+async fn async_main() {
     let stdin = tokio::io::stdin();
     let stdout = tokio::io::stdout();