From 0b6dd2ca112d5d7d45447e5ff44c45f6b0e5c0ee Mon Sep 17 00:00:00 2001
From: jniewerth <niewerth@invencom.de>
Date: Sun, 20 Aug 2017 13:30:03 +0200
Subject: [PATCH] Fix "use-after-relocate" in stream_to_string

cvalue_string() can cause a gc - this potentially makes the ios_t-pointer that is cached in the local variable "st" invalid.
---
 iostream.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/iostream.c b/iostream.c
index 53ec822..9f0d3f8 100644
--- a/iostream.c
+++ b/iostream.c
@@ -389,7 +389,7 @@ value_t stream_to_string(value_t *ps)
         n = st->size;
         str = cvalue_string(n);
         memcpy(cvalue_data(str), value2c(ios_t*,*ps)->buf, n);
-        ios_trunc(st, 0);
+        ios_trunc(value2c(ios_t*,*ps), 0);
     }
     else {
         char *b = ios_takebuf(st, &n); n--;