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'string.byte' gets confused with some out-of-range negative indices + 

user-requested GC step may loop forever
This commit is contained in:
Roberto Ierusalimschy 2008-07-11 14:27:41 -03:00
parent 5298392c5a
commit 6955666290
1 changed files with 59 additions and 2 deletions
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61
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@ -1880,8 +1880,8 @@ patch = [[
+++ lundump.c 2008/04/04 19:51:41 2.7.1.4 +++ lundump.c 2008/04/04 19:51:41 2.7.1.4
@@ -1,5 +1,5 @@ @@ -1,5 +1,5 @@
/* /*
-** $Id: lundump.c,v 2.7.1.3 2008/04/04 16:00:45 roberto Exp $ -** $Id: bugs,v 1.96 2008/05/08 16:55:08 roberto Exp roberto $
+** $Id: lundump.c,v 2.7.1.4 2008/04/04 19:51:41 roberto Exp $ +** $Id: bugs,v 1.96 2008/05/08 16:55:08 roberto Exp roberto $
** load precompiled Lua chunks ** load precompiled Lua chunks
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -1971,3 +1971,60 @@ patch = [[
]], ]],
} }
Bug{
what = [['string.byte' gets confused with some out-of-range negative indices]],
report = [[Mike Pall, on 2008/06/03]],
since = [[5.1]],
example = [[
print(string.byte("abc", -5)) --> 97 98 99 (should print nothing)
]],
patch = [[
--- lstrlib.c 2007/12/28 15:32:23 1.132.1.3
+++ lstrlib.c 2008/07/05 11:53:42
@@ -35,7 +35,8 @@
static ptrdiff_t posrelat (ptrdiff_t pos, size_t len) {
/* relative string position: negative means back from end */
- return (pos>=0) ? pos : (ptrdiff_t)len+pos+1;
+ if (pos < 0) pos += (ptrdiff_t)len + 1;
+ return (pos >= 0) ? pos : 0;
}
]],
}
Bug{
what = [[user-requested GC step may loop forever]],
report = [[Makoto Hamanaka, on 2008/07/01]],
since = [[5.1]],
example = [[
collectgarbage("setpause", 100) -- small value
collectgarbage("setstepmul", 2000) -- large value
collectgarbage("step",0)
]],
patch = [[
--- lapi.c 2008/02/14 16:46:39 2.55.1.4
+++ lapi.c 2008/07/04 18:34:48
@@ -929,10 +929,13 @@
g->GCthreshold = g->totalbytes - a;
else
g->GCthreshold = 0;
- while (g->GCthreshold <= g->totalbytes)
+ while (g->GCthreshold <= g->totalbytes) {
luaC_step(L);
- if (g->gcstate == GCSpause) /* end of cycle? */
- res = 1; /* signal it */
+ if (g->gcstate == GCSpause) { /* end of cycle? */
+ res = 1; /* signal it */
+ break;
+ }
+ }
break;
}
case LUA_GCSETPAUSE: {
]],
}