I was wondering if this is a bug in emacs, or in gnome-terminal/terminator,
since this doesn’t happen with xterm. And do I think this is a bug in emacs
because while reading the strace output, the write line which causes the
bug:
   “\33[45d\33[K\33[2d\33[?25l[I\33[44;7H\33[30m”
should contain: “\33[I”
where in the output it shows: “[I”
missing the “\33”

Here I grepped for ‘write(8,’ in the strace output. What I did was:
  rm file2 ; pkill emacs ; strace -f -o file2 /usr/local/bin/emacs -Q
–daemon
And then from another terminal:
  emacsclient -t ‘.emacs/init.el’
Then: x-c x-k
And after that run
  emacsclient -t ‘.emacs/init.el’ again, knowing this time the buffer would
have focus and won’t get the ‘[I’ inserted. I’ve indented the 2 most
important lines.

han@janis ~ % grep 'write\(8,' file2
16051 write(8, "\33[?1049h\33[22;0;0t\33[?12;25h\33[?1h\33"..., 33) = 33
16051 write(8, "\33[>0c", 5)            = 5
16051 write(8, "\33[?2004h", 8)         = 8
16051 write(8, "\33[?1004h", 8)         = 8
16051 write(8, "\33[H\33[2J", 7)        = 7
16051 write(8, "\33[44d\33[?25l\33[30m\33[48;5;250m-UU-:"..., 207) = 207
16051 write(8, "\33[45d\33[?25lWhen done with a buff"..., 164) = 164
16051 write(8,
"\n\33[K\n\33[K\n\33[K\n\33[K\n\33[K\n\33[K\n\33[K\n\33[K"..., 68) = 68
16051 write(8,
"\n\33[K\n\33[K\n\33[K\n\33[K\n\33[K\n\33[K\n\33[K\n\33[K"..., 68) = 68
16051 write(8,
"\n\33[K\n\33[K\n\33[K\n\33[K\n\33[K\n\33[K\n\33[K\n\33[K"..., 229) = 229
  16051 write(8, “\33[45d\33[K\33[2d\33[?25l[I\33[44;7H\33[30m”…, 80) = 80
16051 write(8, "\33[45;1H\33[?25l\33[38;5;20mKill buff"..., 105) = 105
16051 write(8, "\33[45;32H\33[?12l\33[?25h\33[?12;25h", 29) = 29
16051 write(8, "\r", 1)                 = 1
16051 write(8, "\33[?25l\33[38;5;20mBuffer init.el m"..., 74) = 74
16051 write(8, "\33[?12l\33[?25h\33[?12;25h", 21) = 21
16051 write(8, "\33[?25ly\33[?12l\33[?25h\33[?12;25h", 28) = 28
16051 write(8, "\r", 1)                 = 1
16051 write(8, "\7", 1)                 = 1
16051 write(8, "\33[?25lPlease answer yes or no.\33["..., 60) = 60
16051 write(8, "\33[45;1H\33[?25l\33[38;5;20mBuffer in"..., 81) = 81
16051 write(8, "\33[?12l\33[?25h\33[?12;25h", 21) = 21
16051 write(8, "\33[?25ly\33[?12l\33[?25h\33[?12;25h", 28) = 28
16051 write(8, "\33[?25le\33[?12l\33[?25h\33[?12;25h", 28) = 28
16051 write(8, "\33[?25ls\33[?12l\33[?25h\33[?12;25h", 28) = 28
16051 write(8, "\r", 1)                 = 1
16051 write(8, "\33[K", 3)              = 3
16051 write(8, "\33[?1004l\33[?2004l\33[?1l\33>\33[?12l\33[?"..., 61) = 61
16051 write(8, "\33[?1049h\33[22;0;0t\33[?12;25h\33[?1h\33"..., 33) = 33
16051 write(8, "\33[>0c", 5)            = 5
16051 write(8, "\33[?2004h", 8)         = 8
16051 write(8, "\33[?1004h", 8)         = 8
16051 write(8, "\33[H\33[2J", 7)        = 7
16051 write(8, "\33[45d\33[?25lWhen done with a buff"..., 74) = 74
16051 write(8, "\33[45d\33[?25lWhen done with a buff"..., 164) = 164
16051 write(8,
"\n\33[K\n\33[K\n\33[K\n\33[K\n\33[K\n\33[K\n\33[K\n\33[K"..., 68) = 68
16051 write(8,
"\n\33[K\n\33[K\n\33[K\n\33[K\n\33[K\n\33[K\n\33[K\n\33[K"..., 68) = 68
16051 write(8,
"\n\33[K\n\33[K\n\33[K\n\33[K\n\33[K\n\33[K\n\33[K\n\33[K"..., 229) = 229
  16051 write(8, “\33[45d\33[K\33[2d”, 12) = 12
16051 write(8, "\33[45d\33[?25l\33[38;5;20mKill buffer"..., 103) = 103
16051 write(8, "\33[45;32H\33[?12l\33[?25h\33[?12;25h", 29) = 29
16051 write(8, "\r", 1)                 = 1
16051 write(8, "\33[K", 3)              = 3
16051 write(8, “\33[?1004l\33[?2004l\33[?1l\33>\33[?12l\33[?”…, 61) = 61