From aca19c25d250b8abb91211e2392e01b5611325c9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Kevin=20K=C3=B6ck?= <kevin.koeck@gmx.net>
Date: Sat, 28 Mar 2020 14:55:59 +0100
Subject: [PATCH] extmod/uasyncio: Add error message to Lock.release's
 RuntimeError.

Otherwise it can be hard to understand what the error is if a blank
RuntimeError is raised.
---
 extmod/uasyncio/lock.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/extmod/uasyncio/lock.py b/extmod/uasyncio/lock.py
index 18a55cb483..bddca295b6 100644
--- a/extmod/uasyncio/lock.py
+++ b/extmod/uasyncio/lock.py
@@ -19,7 +19,7 @@ class Lock:
 
     def release(self):
         if self.state != 1:
-            raise RuntimeError
+            raise RuntimeError("Lock not acquired")
         if self.waiting.peek():
             # Task(s) waiting on lock, schedule next Task
             self.state = self.waiting.pop_head()