[erlang-questions] string:substr/2 gives confusing error message

[Vlad Dumitrescu]

Hi!

Calling string:substr/2 with erroneous arguments gives a
non-informative error message

(w@REDACTED)1> string:substr([], 2).
** exception error: no function clause matching string:substr2([],2)

Shouldn't it be badarg instead, or something similar?

Also, the strings module documentation doesn't mention what are the
cases when the function will fail. (A quick glance shows that there
are other functions in the same situation).

best regards,
Vlad