[Grimeton]

You can just do

  trap 'caller 1' ERR

should do the same thing. Also you should set "errtrace" (-E) and possibly "nounset" (-u) and "pipefail".

[gkfasdfasdf]

or even use caller to print a full backtrace: https://news.ycombinator.com/item?id=44636927

[progbits]

That's neat, but if your bash script needs a backtrace it should not be a bash script. To each their own though.