GNU bug report logs - #30600
repl metacommands do not discard remaining input after syntax error in an expression

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: dikbekulo <at> airmail.cc
To: bug-guile <at> gnu.org
Subject: repl metacommands do not discard remaining input after syntax error
 in an expression
Date: Sun, 25 Feb 2018 00:31:19 +0100

Hello!

When using meta-commands in the repl (without readline support), if 
reading an expression parameter fails, the rest of the input gets read 
in anyway. An example interaction:

--8<---------------cut here---------------start------------->8---
GNU Guile 2.2.3
Copyright (C) 1995-2017 Free Software Foundation, Inc.

Guile comes with ABSOLUTELY NO WARRANTY; for details type `,show w'.
This program is free software, and you are welcome to redistribute it
under certain conditions; type `,show c' for details.

Enter `,help' for help.
scheme@(guile-user)> ,trace "\m"
Throw to key `read-error' while reading argument `form' of command 
`trace':
In procedure scm_lreadr: #<unknown port>:1:11: illegal character in 
escape sequence: #\m
"
$1 = "\n"
scheme@(guile-user)> ,trace "\m123
Throw to key `read-error' while reading argument `form' of command 
`trace':
In procedure scm_lreadr: #<unknown port>:2:11: illegal character in 
escape sequence: #\m
$2 = 123
--8<---------------cut here---------------end--------------->8---

Since Geiser uses meta-commands with multi-line expressions to 
communicate with Guile it can get very confusing if you have syntax 
errors in your code.

Message #8 received at 30600 <at> debbugs.gnu.org (full text, mbox):

From: Taylan Kammer <taylan.kammer <at> gmail.com>
To: 30600 <at> debbugs.gnu.org
Subject: repl metacommands do not discard remaining input after syntax error
 in an expression
Date: Tue, 18 May 2021 18:19:30 +0200

[Message part 1 (text/plain, inline)]

Attached is a small patch to fix this.

-- 
Taylan

[0001-Better-REPL-behavior-on-syntax-errors-in-meta-comman.patch (text/plain, attachment)]

Message #15 received at 30600-done <at> debbugs.gnu.org (full text, mbox):

From: lloda <lloda <at> sarc.name>
To: 30600-done <at> debbugs.gnu.org
Subject: re:  repl metacommands do not discard remaining input after syntax
 error in an expression
Date: Fri, 25 Oct 2024 20:19:59 +0200

Applied in 242e8698c2fdfada96a136abde5156bac3dbc6c9. 

Thanks

  lloda

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