Bug 182024

Summary: valgrind output is very noisy.
Product: [Fedora] Fedora Reporter: Dave Jones <davej>
Component: ncursesAssignee: Miroslav Lichvar <mlichvar>
Status: CLOSED RAWHIDE QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: rawhideCC: dickey, jnovy, pfrields, praszyk
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2006-02-27 17:03:15 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Attachments:
Description Flags
ncurses-5.5-18.2.src.rpm
none
mutt-1.4.2.1-6.2.1.src.rpm
none
valgrind-3.1.0-1.2.src.rpm
none
valgrind-mutt.out none

Description Dave Jones 2006-02-19 09:16:26 UTC 
valgrind --error-limit=no --leak-check=yes --show-reachable=yes mutt
2>valgrind-mutt.out

valgrind-mutt.out will be filled with many instances of ..

==23073== Conditional jump or move depends on uninitialised value(s)
==23073==    at 0x392C321723: (within /usr/lib64/libncursesw.so.5.5)
==23073==    by 0x392C321C79: (within /usr/lib64/libncursesw.so.5.5)
==23073==    by 0x392C321551: _nc_scroll_optimize (in /usr/lib64/libncursesw.so.5.5)
==23073==    by 0x392C3370BF: doupdate (in /usr/lib64/libncursesw.so.5.5)
==23073==    by 0x392C32EA4B: wrefresh (in /usr/lib64/libncursesw.so.5.5)
==23073==    by 0x43A341: ??? (pager.c:1738)
==23073==    by 0x410059: ??? (commands.c:181)
==23073==    by 0x418159: ??? (curs_main.c:1070)
==23073==    by 0x42DFE0: ??? (main.c:842)
==23073==    by 0x392BA1D023: __libc_start_main (in /lib64/libc-2.3.90.so)
Comment 1 Miroslav Lichvar 2006-02-21 09:25:38 UTC 
It's a problem in ncurses, there is a compiler padding in cchar_t structure and
memcmp() on the struct that wasn't memset() before causes the warning.
Comment 2 Petr Raszyk 2006-02-23 15:12:39 UTC 
I do not see this as a bug in ncurses.

Please, can you compile/install *.src below
(all devel versions) and repeat your scenario:

  mutt
  valgrind
  ncurses

Many thanks.
Petr Raszyk
Comment 3 Petr Raszyk 2006-02-23 15:15:28 UTC 
Created attachment 125107 [details]
ncurses-5.5-18.2.src.rpm
Comment 4 Petr Raszyk 2006-02-23 15:17:30 UTC 
Created attachment 125108 [details]
mutt-1.4.2.1-6.2.1.src.rpm
Comment 5 Petr Raszyk 2006-02-23 15:19:09 UTC 
Created attachment 125110 [details]
valgrind-3.1.0-1.2.src.rpm
Comment 6 Dave Jones 2006-02-24 02:30:48 UTC 
These are the exact versions I already have installed, along with debuginfo's.
What would rebuilding them from source achieve ?
Comment 9 Petr Raszyk 2006-02-24 14:51:14 UTC 
I do not see this as a bug in ncurses
Comment 10 Miroslav Lichvar 2006-02-27 17:03:15 UTC 
It is fixed in rawhide.
Comment 11 Thomas E. Dickey 2006-03-11 19:21:40 UTC 
That's interesting, but the patch does not fix the problem that
I'm interested in: ncurses supposedly initializes the cchar_t's
either via static declarations or calloc's.  I see a couple of
places where NewChar() and NewChar2() are used on the stack.
Those are probably what was reported.