commit dc59444cd120e38d0babaeb3a7ad3d36f63225e6
parent 6c042e17b15f1381296a7ec1cd207741ade71170
Author: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Tue, 19 Jun 2007 17:23:06 -0300
strong collision for very small numbers used as table keys
Diffstat:
| M | bugs | | | 17 | +++++++++++++++++ |
1 file changed, 17 insertions(+), 0 deletions(-)
diff --git a/bugs b/bugs
@@ -1476,6 +1476,23 @@ ldebug.c:
}
Bug{
+what = [[Very small numbers all collide in the hash function.
+(This creates only performance problems; the behavoir is correct.)]],
+report = [[, on ]],
+since = [[Lua 5.0]],
+example = [[ ]],
+patch = [[
+ltable.c:
+87,88c87,88
+< n += 1; /* normalize number (avoid -0) */
+< lua_assert(sizeof(a) <= sizeof(n));
+---
+> if (luai_numeq(n, 0)) /* avoid problems with -0 */
+> return gnode(t, 0);
+]],
+}
+
+Bug{
what = [[ ]],
report = [[ , on ]],
since = [[i ]],
