From 27e28284fbf5fbbef1bb62cebb5eba6456958be1 Mon Sep 17 00:00:00 2001
From: Tom Smeding <tom.smeding@gmail.com>
Date: Thu, 17 Sep 2020 23:55:58 +0200
Subject: rust: Don't crash when we can't write debug.txt

---
 rust/src/main.rs | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/rust/src/main.rs b/rust/src/main.rs
index 8dc5163..4b79973 100644
--- a/rust/src/main.rs
+++ b/rust/src/main.rs
@@ -21,14 +21,16 @@ use crate::error::IntoIOError;
 mod editor;
 mod error;
 
-static DEBUG_FILE: Lazy<Mutex<File>> = Lazy::new(|| {
+static DEBUG_FILE: Lazy<Mutex<Option<File>>> = Lazy::new(|| {
     Mutex::new(
         OpenOptions::new().write(true).truncate(true).create(true)
-            .open("debug.txt").unwrap())
+            .open("debug.txt").ok())
 });
 
 fn debug_write(s: &str) {
-    writeln!(DEBUG_FILE.lock().unwrap(), "{}", s).unwrap();
+    let file = DEBUG_FILE.lock().unwrap();
+    file.as_ref()
+        .map(|mut file| writeln!(file, "{}", s).unwrap());
 }
 
 macro_rules! debug {
-- 
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