Re: Segfaults in libc-2.19 w/ 2.9.2

On Tue, 16 Jan 2018, at 21:18, Benno Schulenberg wrote:

>> Only with 2.9.2, I seem to face segfaults more frequently, yet not 
>> very often.
> *More* frequently?  You mean older nanos used to crash too, now and 
> then? If yes, which nanos?  All versions since 2.7.0?

Uhm, well, you know, 2 is more than 1. I *think* nano crashed once in 
the past 10 years or so. Seriously, I cannot remember any crashes 
since 2.6 or 2.7 (when I started compiling them myself) which were not 
caused by other circumstances. I do remember issues with syntax 
highlighting but I think this was with older versions.

>> Also not often enough to see a pattern. The 2 most recent segfaults 
>> (...) occurred while typing (no special operations) in 7K large 
>> file using syntax highlighting for Markdown,
>
> Nano itself does not come with a syntax file for Markdown.  Please 
> attach the file that you use for this.  Maybe it contains regexes 
> that trigger the segfault.

Attached.

>> What can I do to track this down?
>
> Try to recreate the exact situation of the crash as soon as you get 
> a segfault: open the same file again, type the same stuff again, 
> until you can reproduce the crash.  Once you can reproduce it, it 
> can be fixed.

That's good advice. I will do this. Thanks a lot!

-- 
-- Andreas

     :-)

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# markdown.nanorc
# originally from https://github.com/serialhex/nano-highlight (2015-06-10)

syntax "markdown" "\.md$"

## Quotations
color cyan "^>.*"

## Emphasis
color green "_[^_]*_"
color green "\*[^\* ][^\*]*[^\* ]\*"
color green "\*[^\* ]\*"

## Strong emphasis
color brightgreen "\*\*[^\*]*\*\*"
color brightgreen "__[\_]*__"

## Underline headers
color brightblue "^====(=*)"
color brightblue "^----(-*)"

## Hash headers
color brightblue "^#.*"

## Linkified URLs (and inline html tags)
color brightmagenta "</?[a-z][^<>]*>"

## Links
color brightmagenta "\[.*\](\([^\)]*\))?"

## Link id's:
color brightmagenta "^\[.*\]:( )+.*"

## Code spans
color brightyellow "`[^`]*`"

## Links and inline images
color brightmagenta start="!\[" end="\]"
color brightmagenta start="\[" end="\]"

## Lists
color yellow "^( )*(\*|\+|\-|[0-9]+\.) "