From 88faa3b4082485ccf7e2c1be9e351be355818fe7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bj=C3=B6rn=20Gustavsson?= <bjorn@erlang.org>
Date: Wed, 25 Apr 2018 10:03:27 +0200
Subject: beam_validator: Clear X registers in wait_timeout

Help us find more compiler bugs.
---
 lib/compiler/src/beam_validator.erl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/compiler/src/beam_validator.erl b/lib/compiler/src/beam_validator.erl
index d5aef51dfa..962f17d83c 100644
--- a/lib/compiler/src/beam_validator.erl
+++ b/lib/compiler/src/beam_validator.erl
@@ -576,7 +576,7 @@ valfun_4({wait,_}, Vst) ->
 valfun_4({wait_timeout,_,Src}, Vst) ->
     assert_term(Src, Vst),
     verify_y_init(Vst),
-    Vst;
+    prune_x_regs(0, Vst);
 valfun_4({loop_rec_end,_}, Vst) ->
     verify_y_init(Vst),
     kill_state(Vst);
-- 
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