Apparent bug in pdftex/xetex (but not luatex)

Karl Berry karl at
Wed Apr 28 00:26:21 CEST 2021

Hi Marcel - thanks for the patch.

    +     name_field=18..19 means \scantokens pseudo files

I can't research right now, seems like that implies that in original TeX
(where there is no \scantokens), it should start at 18? I wrote that new
bit of code originally in response to the prior bug reports about
(original) TeX crashing with "e".

    +#elif defined(MF)
    +    if (inputstack[is_ptr].namefield <= 2) {


    +#error "Unable to identify program"

MetaPost ... --thanks, karl.

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