[NTG-context] problem with Segoe Ui Symbol as fallback font

Henning Hraban Ramm texml at fiee.net
Mon Nov 7 19:42:45 CET 2022

I’d like to set Segoe UI Symbol as fallback for all missing glyphs.
But it doesn’t work, I get an error like

registered function call [1145]: 
attempt to perform arithmetic on a nil value (field 'depth')

... even if there’s no fallback enabled for the math font.


That used to work, at least until version 2022-09-18.

It’s completely irregular which ranges throw an error:
0x03000-0x20000 runs
0x02000-0x03000 doesn’t
0x02200-0x027FF doesn’t

And the fallbacks also don’t work, even if there’s no error.

It seems to depend on the font – I get errors with Segoe UI Symbol, but 
not with EmojiOneColor or Symbola.

I checked with font versions 5.0 and 5.01, don’t have newer ones.

Does it work with current versions?

Also, a list of fallbacks doesn’t work (I’d like to replace single 
characters from different fonts); is it supposed to?

test file attached.

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