[Chicken-janitors] #1467: Hash-prefixed numbers cause confusing error message in scripts

[Chicken Trac]

#1467: Hash-prefixed numbers cause confusing error message in scripts
-------------------------------------+-------------------------------------
 Reporter:  sjamaan                  |                 Owner:  sjamaan
     Type:  enhancement              |                Status:  new
 Priority:  major                    |             Milestone:  5.1
Component:  core libraries           |               Version:  5.0
 Keywords:  read syntax, history     |  Estimated difficulty:  easy
  references, scripts, errors        |
-------------------------------------+-------------------------------------
 As pointed out by erkin on IRC, when you run a script with `-ss` which
 contains something like `#0`, the error message you get is confusing if
 you don't know about csi's history references (especially given that this
 is a script, not manual input).

 The error is:

 {{{
 Error: history entry index out of range: 0
 }}}

 If this is the result of running a long script that somewhere contains
 `#0`, this doesn't point to the location of the issue either.

 Proposed possible improvements:

 - Add the `#` to the error message so it's clear that this syntax is
 causing it, even if you don't know what a "history index" is.
 - Include the line number (part of a larger issue in evaluated script
 code, and the hardest to implement)
 - Disable history syntax when running with `-s` or `-ss`.

--
Ticket URL: <https://bugs.call-cc.org/ticket/1467>
CHICKEN Scheme <https://www.call-cc.org/>
CHICKEN Scheme is a compiler for the Scheme programming language.