Help, minor bug in testsuite

[Michael Snyder]

Pedro Alves wrote:
> On Friday 04 June 2010 23:26:55, Michael Snyder wrote:
>> OK, not sure what to do with this one.  The test in gdb.base/list.exp
>> says:
>>
>>      # Try listsize of 0 which suppresses printing.
>>
>>      set_listsize 0
>>      gdb_test "list 1" "" "listsize of 0 suppresses output"
>>
>>
>> However, the test only passes because "" is the same as ".*".
>> In fact, the output is NOT suppressed, and I can find nowhere
>> in the documentation that says it SHOULD be suppressed.
> 
> (Without commenting on whether setting listsize to 0 to suppress
> output had any value,) it appears to be a regression at some
> point.  Note with GDB 6.0:
> 
>  >~/gdb/ancient/build-6.0/gdb/gdb ~/gdb/tests/main32
>  GNU gdb 6.0
>  Copyright 2003 Free Software Foundation, Inc.
>  GDB is free software, covered by the GNU General Public License, and you are
>  welcome to change it and/or distribute copies of it under certain conditions.
>  Type "show copying" to see the conditions.
>  There is absolutely no warranty for GDB.  Type "show warranty" for details.
>  This GDB was configured as "i686-pc-linux-gnu"...
>  (gdb) list 1
>  1       #include <stdio.h>
>  2
>  3       int main (int argc, char **argv)
>  4       {
>  5         return 0;
>  6       }
>  (gdb) set listsize 0
>  (gdb) list 1
>  (gdb) 
> 
> vs current gdb:
> 
>  >./gdb ~/gdb/tests/main32
>  GNU gdb (GDB) 7.1.50.20100601-cvs
>  Copyright (C) 2010 Free Software Foundation, Inc.
>  License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
>  This is free software: you are free to change and redistribute it.
>  There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
>  and "show warranty" for details.
>  This GDB was configured as "x86_64-unknown-linux-gnu".
>  For bug reporting instructions, please see:
>  <http://www.gnu.org/software/gdb/bugs/>...
>  Reading symbols from /home/pedro/gdb/tests/main32...done.
>  (gdb) set listsize 0
>  (gdb) list 1
>  1       #include <stdio.h>
>  2
>  3       int main (int argc, char **argv)
>  4       {
>  5         return 0;
>  6       }
>  (gdb) 
> 
> 
>> I'm not sure what to do with this test...
> 

Ah, so it looks like a false pass, and I should make it fail.