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List: gcc-bugs
Subject: libstdc++/3018: bug in std_bitset.h for bitset<>::test method
From: brendan () zen ! org
Date: 2001-05-31 21:58:31
[Download RAW message or body]
> Number: 3018
> Category: libstdc++
> Synopsis: bug in std_bitset.h for bitset<>::test method
> Confidential: no
> Severity: serious
> Priority: medium
> Responsible: unassigned
> State: open
> Class: sw-bug
> Submitter-Id: net
> Arrival-Date: Thu May 31 15:06:03 PDT 2001
> Closed-Date:
> Last-Modified:
> Originator: brendan@zen.org
> Release: egcs3 branch
> Organization:
> Environment:
> Description:
Attached is a tweak to fix the test() method in the bitset template class. The \
comparison should be looking at pos being >= the number of bits, not just > the \
number.
Hope this helps,
B
> How-To-Repeat:
> Fix:
> Release-Note:
> Audit-Trail:
> Unformatted:
----gnatsweb-attachment----
Content-Type: text/plain; name="diffs-bitset.txt"
Content-Disposition: inline; filename="diffs-bitset.txt"
2001-05-31 Brendan Kehoe <brendan@zen.org>
* include/bits/std_bitset.h (bitset::test): Fix comparison to
check __pos >= _Nb, since __pos also cannot be == _Nb given that
the bits are values 0 to _Nb-1, not 0 to _Nb.
Index: std_bitset.h
===================================================================
RCS file: /cvs/gcc/egcs/libstdc++-v3/include/bits/std_bitset.h,v
retrieving revision 1.3.6.2
diff -u -p -r1.3.6.2 std_bitset.h
--- std_bitset.h 2001/05/14 19:49:03 1.3.6.2
+++ std_bitset.h 2001/05/31 21:52:15
@@ -629,7 +629,7 @@ public:
}
bool test(size_t __pos) const {
- if (__pos > _Nb)
+ if (__pos >= _Nb)
__STL_THROW(out_of_range("bitset"));
return _Unchecked_test(__pos);
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