bug#56553: 29.0.50; ASAN error with fringe bitmaps on NS

[Gerd Möllmann]

On 22-07-15 17:16 , Gerd Möllmann wrote:
> Just wanted to add, in case someone wonders what's going on -- a look 
> at define-fringe-bitmap helps.

That was a bit cryptic in hindsight, sorry.

Fact of the matter is, define-fringe-bitmap creates an array of unsigned 
short, with an element for each row of the bitmap.  The max width of 
fringe bitmaps is 16, the function checks that.  That has nothing to do 
with XBM (that was used 20 years ago...).

So, that's the reason why Andreas' fix works.