Garbage copied from PDF when using certain fonts

[Huanyu Liu]

Hello LilyPond developers,
     


When using certain fonts (in my case, Noto CJK, both pan-CJK and subset 
versions), the output looks right but when copied from the generated PDF file, 
everything becomes garbage. For example: 
      
 
               \version "2.22.0"
         \markup {
           \override #'(font-name . "Noto Serif CJK SC")
           { English 中文 にほんご }
         } 
      
 
      The output looks right, but when copied it becomes "&OHMJTI ╚倁 מ׮؆ׇ". 
If I use Noto Sans CJK SC, it will be "&OHMJTI ╈乄 מ׮؆ׇ" (different from the 
previous one). Noto Serif JP (not pan-CJK) then "&OHMJTI ╚倀 מ׮؆ׇ". (It 
seems that LilyPond is smart when selecting the language depending on your 
system environment, so we may have to use the subset version to select 
explicitly.)



Other fonts that I have used so far don't have any problems.


It seems to be all about CID. Maybe related to Issue #6058?


Best regards,
Huanyu Liu