From 5643ef05bc81e4a840e9456f4406a769abbe1392 Mon Sep 17 00:00:00 2001
From: Roberto Vidal <vidal.roberto.j@gmail.com>
Date: Fri, 30 Oct 2020 14:39:28 +0100
Subject: [PATCH] fix: more unique temp_file

---
 src/exercise.rs | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/exercise.rs b/src/exercise.rs
index b07d7a11..283b2b90 100644
--- a/src/exercise.rs
+++ b/src/exercise.rs
@@ -11,10 +11,15 @@ const I_AM_DONE_REGEX: &str = r"(?m)^\s*///?\s*I\s+AM\s+NOT\s+DONE";
 const CONTEXT: usize = 2;
 const CLIPPY_CARGO_TOML_PATH: &str = "./exercises/clippy/Cargo.toml";
 
-// Get a temporary file name that is hopefully unique to this process
+// Get a temporary file name that is hopefully unique
 #[inline]
 fn temp_file() -> String {
-    format!("./temp_{}", process::id())
+    let thread_id: String = format!("{:?}", std::thread::current().id())
+        .chars()
+        .filter(|c| c.is_alphanumeric())
+        .collect();
+
+    format!("./temp_{}_{}", process::id(), thread_id)
 }
 
 // The mode of the exercise.