From 07b0ef16482e16d5a84cb2651cbd1ea56251b307 Mon Sep 17 00:00:00 2001
From: Calvin Rose <calsrose@gmail.com>
Date: Wed, 18 Dec 2019 15:49:57 -0500
Subject: [PATCH] Throw error on bad thread creation.

---
 src/core/thread.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/core/thread.c b/src/core/thread.c
index 23c9a8eb..0010d4e0 100644
--- a/src/core/thread.c
+++ b/src/core/thread.c
@@ -551,7 +551,9 @@ static Janet cfun_thread_new(int32_t argc, Janet *argv) {
     }
 
     /* If thread started, send the worker function. */
-    janet_thread_send(thread, argv[0], -1.0);
+    if (janet_thread_send(thread, argv[0], -1.0)) {
+        janet_panicf("could not send worker function %v to thread", argv[0]);
+    }
 
     return janet_wrap_abstract(thread);
 }