Hi, this is a list with the 'char comparison bug'. This list is maybe not complete but a starting point for undefined behaviour of some packages.
gpm_1.17.5-1: mice.c:245: warning: comparison is always 0 due to limited range of data type Bash-2.02.1: complete.c:459: warning: comparison is always 1 due to limited range of data type masqdialer_0.3.3-1: mserver.c:73: warning: comparison is always 1 due to limited range of data type lilypond_1.1.31-1: /usr/share/misc/bison.simple:613: warning: comparison between signed and unsigned /usr/share/misc/bison.simple:625: warning: comparison between signed and unsigned cern-httpd_3.0A-2: ../../Library/Implementation/HTFTP.c:1904: warning: comparison is always 0 due to limited range of data type ../../Library/Implementation/HTNews.c:235: warning: comparison is always 0 due to limited range of data type isdnutils_3.0-11: pcbitctl.c:64: warning: comparison is always 0 due to limited range of data type xfree86_3.3.2.3a-11: (for a check with 3.3.3.1) imake.c:961: warning: comparison is always 1 due to limited range of data type vdk_0.6.0-4: text.cc:154: warning: comparison is always 1 due to limited range of data type gnome-admin_0.30-4: log_repaint.c:171: warning: comparison is always 1 due to limited range of data type log_repaint.c:172: warning: comparison is always 1 due to limited range of data type log_repaint.c: In function `log_redrawcursor': log_repaint.c:514: warning: comparison is always 1 due to limited range of data type log_repaint.c:515: warning: comparison is always 1 due to limited range of data type log_repaint.c: In function `DrawLogLine': log_repaint.c:559: warning: comparison is always 1 due to limited range of data type log_repaint.c:559: warning: comparison is always 1 due to limited range of data type log_repaint.c:559: warning: comparison is always 1 due to limited range of data type log_repaint.c: In function `GetLineAtCursor': log_repaint.c:739: warning: comparison is always 1 due to limited range of data type log_repaint.c:740: warning: comparison is always 1 due to limited range of data type log_repaint.c: In function `GetPageAtCursor': log_repaint.c:799: warning: comparison is always 1 due to limited range of data type log_repaint.c:800: warning: comparison is always 1 due to limited range of data type logrtns.c:387: warning: comparison is always 0 due to limited range of data type logrtns.c:408: warning: comparison is always 0 due to limited range of data type rxvt_2.4.5-17: screen.c:1376: warning: comparison is always 0 due to limited range of data type xwpe_1.4.2-2.1: we_fl_fkt.c:134: warning: comparison is always 0 due to limited range of data type we_fl_fkt.c:139: warning: comparison is always 0 due to limited range of data type we_fl_fkt.c:380: warning: comparison is always 0 due to limited range of data type we_fl_fkt.c:393: warning: comparison is always 0 due to limited range of data type linpopup_0.9.5-1: distrib/mkhelp.c:55: warning: comparison is always 1 due to limited range of data type dosfstools_1.0-15: mkdosfs.c:873: warning: comparison is always 1 due to limited range of data type 3mod_1.09-10: mod.c:121: warning: comparison is always 0 due to limited range of data type s3m.c:535: warning: comparison is always 0 due to limited range of data type cmdline.c:118: warning: comparison is always 1 due to limited range of data type webalizer_1.21.10-1: webalizer.c:3190: warning: comparison is always 0 due to limited range of data type