commit 001bb46ae1b2bc0b3ce514f4a98e431656046e97
parent 9b25347a6752d27e7ff74a2ed82301ead1bc9a1b
Author: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Mon, 1 Sep 2014 13:55:36 -0300
bug: Ephemeron table can wrongly collect entry with strong key
Diffstat:
| M | bugs | | | 29 | +++++++++++++++++++++++++++-- |
1 file changed, 27 insertions(+), 2 deletions(-)
diff --git a/bugs b/bugs
@@ -1880,8 +1880,8 @@ patch = [[
+++ lundump.c 2008/04/04 19:51:41 2.7.1.4
@@ -1,5 +1,5 @@
/*
--** $Id: bugs,v 1.131 2014/05/07 16:35:24 roberto Exp roberto $
-+** $Id: bugs,v 1.131 2014/05/07 16:35:24 roberto Exp roberto $
+-** $Id: bugs,v 1.132 2014/05/07 16:57:27 roberto Exp roberto $
++** $Id: bugs,v 1.132 2014/05/07 16:57:27 roberto Exp roberto $
** load precompiled Lua chunks
** See Copyright Notice in lua.h
*/
@@ -3223,6 +3223,31 @@ patch = [[
]]
}
+Bug{
+what = [[Ephemeron table can wrongly collect entry with strong key]],
+report = [[Jörg Richter, 2014/08/22]],
+since = [[5.2]],
+fix = nil,
+example = [[
+(This bug is very hard to reproduce,
+because it depends on a specific interleaving of
+events between the incremental collector and the program.)
+]],
+patch = [[
+--- lgc.c 2013/04/26 18:22:05 2.140.1.2
++++ lgc.c 2014/09/01 13:24:33
+@@ -403,7 +403,7 @@
+ reallymarkobject(g, gcvalue(gval(n))); /* mark it now */
+ }
+ }
+- if (prop)
++ if (g->gcstate != GCSatomic || prop)
+ linktable(h, &g->ephemeron); /* have to propagate again */
+ else if (hasclears) /* does table have white keys? */
+ linktable(h, &g->allweak); /* may have to clean white keys */
+]]
+}
+
--[=[
Bug{
