Re: [Bug] \~ can overwrite previous text.

[Alejandro Colomar]

On 3/6/23 14:47, G. Branden Robinson wrote:
> Hi Alex,

Hi Branden,

> 
> At 2023-03-06T14:16:02+0100, Alejandro Colomar wrote:
>> Hi Branden!
>>
>> I only tested this with groff 1.23.0, so I don't know if it's a
>> regression or a longstanding bug (I hope they aren't a renewable
>> source? :p).
> 
> I can reproduce it with groff 1.23.0-HEAD and groff 1.22.4.  So not a
> new bug.

Good.

> 
> Just from eyeballing the behavior, it looks like there is no lower bound
> on the size of a "stretchable" ("paddable") space, and there should be.
> Or equivalently, the "stretch" should not be permitted to take negative
> values.
> 
> Thanks for the reproducer.
> 
> Looks like this one will need to be scheduled for groff 1.23.1.

I've been trying to fix it myself, but C++ isn't very nice for my
debugging methods :(.

Am I in the right path with this?:

$ ./troff -man -Tutf8 ~/tmp/space.man -rLL=60n 2>&1 | sed -n '/746/,/746/p'
ALX: src/roff/troff/input.cpp:process():7462
ALX: src/roff/troff/node.h:node():130
ALX: src/roff/troff/node.cpp:space_node():3198
ALX: src/roff/troff/node.cpp:word_space_node():4423
ALX: src/roff/troff/node.cpp:unbreakable_space_node():4487
ALX: src/roff/troff/input.cpp:process():7465

Consider that those line numbers are including the debugging (fprintf(3))
lines that I just added.

Any other hints are appreciated.  :)

> 
> Do you have time to file a Savannah ticket for it?

Done.

> 
> https://savannah.gnu.org/bugs/?group=groff&func=additem

Thanks for the link; I struggle finding what I need in savannah.
It's hard to find the gazelle you're looking for :)

> 
> Regards,
> Branden

Cheers,

Alex

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