Re: [NTG-pdftex] vf font expansion bug

26 Mar 2020


      On 3/26/2020 10:25 AM, The Thanh Han wrote:
...
On Wed, Mar 25, 2020 at 2:18 PM Hans Hagen mailto:j.hagen@xs4all.nl> wrote:
On 3/25/2020 2:06 PM, The Thanh Han wrote:
     > Hi Karl,
     >
     > it seems the primary problem is that pdftex tries to set font
    expansion
     > parameters for a font without checking if the font has been
     > successfully loaded (hence it modifies null_font which is totally
    wrong).
     >
     > Please find the proposed patch attached. I have tested it against
    your
     > test files (thanks again for making things easy to reproduce).
    But shouldn't there be some message then too?
I agree clear message should be given when something goes wrong. In
this case however I don't know what  message should pdftex say. The
fix is about preventing pdftex from doing something it should not, i.e. 
setting
expansion parameters for a font that could not be loaded.
something "no expansion applied to virtual font 'foo'" or so ... just to 
prevent some question about a possible bug coming up 5 years from now 
(when everyone has forgotten about this check)

Hans

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