CODEWITHSUNDEEP
schememit-scheme
Flux
Flux

Reputation: 10940

How to turn off the debugger in MIT Scheme

MIT Scheme's REPL automatically starts the interactive debugger when there is an error:

1 ]=> foobar

;Unbound variable: foobar
;To continue, call RESTART with an option number:
; (RESTART 3) => Specify a value to use instead of foobar.
; (RESTART 2) => Define foobar to a given value.
; (RESTART 1) => Return to read-eval-print level 1.

2 error>

How do I turn off the debugger? All I want to see is the error message (e.g. ;Unbound variable: foobar) without entering the debugger. In other words, I want to return to read-eval-print level 1 automatically whenever there is an error.

MIT Scheme version: 10.1.10

Upvotes: 0

Views: 89

Answers (1)

Flux
Flux

Reputation: 10940

MIT Scheme's interactive debugger can be turned off by running:

(set! standard-error-hook
  (lambda (condition)
    (display (condition/report-string condition))
    (abort)))

To make the change persistent across REPL sessions, add the lines above to your MIT Scheme initialization file (~/.scheme.init on UNIX-like systems).

When there is an error in the REPL, the interactive debugger will no longer appear:

1 ]=> foobar
Unbound variable: foobar
;Abort!

1 ]=>

Upvotes: 1

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