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bug: Ephemeron table can wrongly collect entry with strong key

This commit is contained in:
Roberto Ierusalimschy 2014-09-01 13:56:01 -03:00
parent 9b25347a67
commit 001bb46ae1
1 changed files with 27 additions and 2 deletions
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29
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@ -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{