Update (27 November 2021): This issue is now fixed in
fancyvrb 4.1. In version 4.0,
fancyvrb changed the handling of the
lastline option so that using
lastline= hides all lines (nothing is displayed). However, this also caused
lastline used with no argument to hide all lines. That is, the
lastline default was to hide all lines.
lastline (default argument) as part of the highlighting process for
minted environments, so these environments stopped displaying anything with
fancyvrb 4.0. Everything works correctly again with
fancyvrb 4.1, which switches
lastline (default argument) back to the original behavior.
The relevant change seems to be
fancyvrb.sty line 225. This causes
minted to write nothing to the temp file it uses for highlighting code, instead of writing the code.
Everything can be switched back to the original behavior, fixing
minted, by adding this to the preamble:
At this point (22 November 2021), I am still unsure whether this change in
fancyvrb was fixing an old bug (in which case
minted should adapt), introducing a new bug, or defining new behavior.