On 2016-07-14 14:22:15 -0700, Vincent Lefevre wrote: > On 2016-07-14 09:02:48 +0200, Walter Doekes wrote: > > Leon Meier wrote: > > > As of today, the test case [...] still fails in (u)xterm. > > > Any resolution in sight? > > > > I tried to reproduce, and indeed, it fails on xterm (without the 'ne' grep > > option), but not in gnome-terminal. > > > > Does that mean that this is an xterm bug again and not a grep bug? > > It is GNOME Terminal that is buggy, so that the grep bug is not > visible.
A solution for "grep" would be to add a space+backspace before the escape sequence. Testcase: for i in `seq 5` ; do printf "%0$(($(tput cols)+i-5))dab \bc\n" ; done | \ GREP_COLORS="mt=41;97:ne" grep --color c This works fine in Xterm, giving on a 80-column terminal: 0000000000000000000000000000000000000000000000000000000000000000000000000000abc 00000000000000000000000000000000000000000000000000000000000000000000000000000abc 000000000000000000000000000000000000000000000000000000000000000000000000000000abc 0000000000000000000000000000000000000000000000000000000000000000000000000000000abc 00000000000000000000000000000000000000000000000000000000000000000000000000000000abc where only the "c" has the red background. However, this triggers the bug in GNOME Terminal (and other libvte-based terminals): 0000000000000000000000000000000000000000000000000000000000000000000000000000abc 00000000000000000000000000000000000000000000000000000000000000000000000000000ac 000000000000000000000000000000000000000000000000000000000000000000000000000000abc 0000000000000000000000000000000000000000000000000000000000000000000000000000000abc 00000000000000000000000000000000000000000000000000000000000000000000000000000000abc -- Vincent Lefèvre <vinc...@vinc17.net> - Web: <https://www.vinc17.net/> 100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/> Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)
