[c0nstantine]

Are you using MAC? For tests please try:

$ make && bash test.sh

with 'bash' instead.

For the second part it is a bug in the README. Thank you for pointing this out! I had to be more careful before the publication. Fixed. Try '-ma' flags instead.

$echo '' | trre -ma ':(0|1){,3}?'

[simlevesque]

I'm using Linux.

[c0nstantine]

Did it solve the problem? I guess the issue is the process substitution construction of bash "<()". Not all shells support this.