From ca5c17eb1acd8b3f0efb62d6952dfa8bf5551756 Mon Sep 17 00:00:00 2001
From: Kaz Kylheku <kaz@kylheku.com>
Date: Mon, 7 Mar 2016 06:34:20 -0800
Subject: gc bug: prepared_msg field of struct parser.

* parser.l (yyerrprepf): Replace wrong bare assignment
to parser->prepared_msg with proper set macro which
handles the mutation of a mature generation object
such that it points to a baby object.
---
 parser.l | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'parser.l')

diff --git a/parser.l b/parser.l
index aa7fb6dc..7c856274 100644
--- a/parser.l
+++ b/parser.l
@@ -129,7 +129,8 @@ static void yyerrprepf(scanner_t *scanner, val fmt, ...)
   if (opt_loglevel >= 1) {
     va_list vl;
     va_start (vl, fmt);
-    parser->prepared_msg = vformat_to_string(fmt, vl);
+    set(mkloc(parser->prepared_msg, parser->parser),
+        vformat_to_string(fmt, vl));
     va_end (vl);
   }
 }
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