[Amforth-devel] leftbracket bug

[pix <pi...@te...>]

hi,

i've just been working on a python script to upload forth source files
to amforth. it watches the character echo to do a kind of software flow
control, and waits for a prompt after each line. to test it with
different inputs, i've been using the files in blocks, and when i hit
blocks/interrupts.frt i ran into what i think is a parser bug in
amforth.

when given a long sequence starting with a right bracket, after hitting
enter, amforth basically goes crazy and needs to be reset. it gets
triggered by the first line of blocks/interrupts.frt:

( make noop the default interrupt word )

as a test i made a file of different length leftbracket sequences:

> ( xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
 ok
> ( xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
 ok
> ( xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
 ok
> ( xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
 ok
> ( xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>^[[?1;2c^[[?1;2c

the stuff at the end is amforth going squirrely and confusing my terminal.

here is the same test but with closed bracket sequences:

> ( xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx )
 ok
> ( xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx )
 ok
> ( xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx )
 ok
> ( xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx )
 okøø ^[[?1;2c

as you can see it doesn't matter if you close the sequence or not.

this is with amforth 1.3

pix.