when I compile the following with context
\pdfvariable compresslevel=0 \starttext $f$ \stoptext
I get in the pdf
1 beginbfchar <0515> <D875DC53> endbfchar
D875DC53 is according to http://www.russellcottrell.com/greek/utilities/surrogatepaircalculator.htm the codepoint 2D453 and this is not a valid unicode point. As a result copy& paste doesn't work correctly.
A similar example with xelatex writes D835DC53 (remark the 3 instead of the 7) instead in the pdf which gives the correct code point 1D453 and copies fine.
lualatex gives the faulty value too.
On 8/8/2018 12:13 PM, Ulrike Fischer wrote: line 228 in font-map should be: k = k - 0x10000 (not v = ...) Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl -----------------------------------------------------------------