Re: Bug: Bash forgets sourcefile and linenumber of read-in functions

[Greg Wooledge]

On Mon, Mar 11, 2019 at 01:15:16PM -0700, L A Walsh wrote:
> 1) Where is it documented that if you export a function, the original
> source location is thrown away by bash?

It's not documented so much as blatantly obvious by looking at how it's
implemented.


wooledg:~$ export -f title
wooledg:~$ env | grep -A2 title
BASH_FUNC_title%%=() {  local IFS=' ';
 printf '\e]2;%s\a' "$*"
}


There's nowhere in that variable to store metadata such as original source
file or line number.  You'd need a second variable at the very least.
It would require a modification of the function export/import code, and
this would break compatibility *again* (just like the shellshock patches
did when they changed the implementation).