>Number: 155886
>Category: bin
>Synopsis: bc sometimes mangles hexidecimal numbers
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Wed Mar 23 11:10:01 UTC 2011
>Closed-Date:
>Last-Modified:
>Originator: Dan Strick
>Release: FreeBSD 8.1-RELEASE i386
>Organization:
none
>Environment:
System: FreeBSD mist 8.1-RELEASE FreeBSD 8.1-RELEASE #0: Sat Aug 14 09:15:14
PDT 2010 root@mist:/usr/src/sys/i386/compile/MIST i386
>Description:
The bc program sometimes mangles hexidecimal numbers.
I don't really understand what it is doing, but it seems to be
incorrect and when it does this it is worse than useless.
See below for a reasonably simple example.
>How-To-Repeat:
Enter the following, beginning at a shell prompt:
% /usr/bin/bc
obase=16
ibase=16
.1F9A6B50B0F27C00
The bc program responds:
bc 1.06
Copyright 1991-1994, 1997, 1998, 2000 Free Software Foundation,
Inc.
This is free software with ABSOLUTELY NO WARRANTY.
For details type `warranty'.
.1F9A6B50B0F27B
In other words, I enter the number:
.1F9A6B50B0F27C00
and it responds:
.1F9A6B50B0F27B
I did a little more experimentation. If I set ibase to a
value greater than decimal 10 and enter:
.1
the bc program responds:
0
The value of obase does not seem to matter.
>Fix:
unknown
>Release-Note:
>Audit-Trail:
>Unformatted:
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