On Jan 8, 11:50 am, Stefan Götz <stefan.go...@cs.rwth-aachen.de> wrote: > Hi! > > It seems that in bash version 4.0.33(1)-release (i486-pc-linux-gnu) (from > Ubuntu > 9.04), ERR traps are not inherited by functions that are called via command > substitution. I expected inheritance to apply in this case since the > documentation of 'set -E' promises inheritance of the ERR trap for subshell > contexts. The script below illustrates this behavior as the trap action > err_handler() is not called. > > Is this behaviour intended? Even if so, I'd like to say that I would find ERR > trap inheritance for command substitution extremely useful :-) > > Cheers, > Stefan > > #!/bin/bash > > err_handler() { > echo "THERE WAS AN ERROR" > > } > > set -E > trap 'err_handler' ERR > > myfunc() { > false # fails to cause an ERR trap > true > > } > > FOO=$(myfunc) > exit 0 > > signature.asc > < 1KViewDownload
Change your error handler to output to stderr: err_handler() { echo "THERE WAS AN ERROR" >&2 }