From 8c663c2c2ff0d79b2c7cfadb0ce961339f1e7e4c Mon Sep 17 00:00:00 2001
From: Andreas Klebinger <klebinger.andreas@gmx.at>
Date: Wed, 4 Mar 2020 16:12:14 +0100
Subject: Be explicit about how stack usage of mvar primops are covered.

This fixes #17893

[skip-ci]
---
 rts/HeapStackCheck.cmm | 1 +
 1 file changed, 1 insertion(+)

(limited to 'rts/HeapStackCheck.cmm')

diff --git a/rts/HeapStackCheck.cmm b/rts/HeapStackCheck.cmm
index 461cf13df1..fc128e312f 100644
--- a/rts/HeapStackCheck.cmm
+++ b/rts/HeapStackCheck.cmm
@@ -524,6 +524,7 @@ stg_block_takemvar_finally
     jump StgReturn [R1];
 }
 
+// Stack useage covered by RESERVED_STACK_WORDS
 stg_block_takemvar /* mvar passed in R1 */
 {
     Sp_adj(-2);
-- 
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