Unable to generate output

[David Honour]

Hi,

Since I did a system update I've been unable to get a PDF out of lilypond, the 
smallest example I've found to trigger is:
{c}

It would appear the ghostscript is unhappy with the postscript in the tempfile, 
error is:
Error: /rangecheck in /--.parsecff--
Operand stack:
   false   --nostringval--
Execution stack:
   %interp_exit   .runexec2   --nostringval--   --nostringval--   
--nostringval--   2   %stopped_push   --nostringval--   --nostringval--   
--nostringval--   false   1   %stopped_push   1990   1   3   %oparray_pop   
1989   1   3   %oparray_pop   1977   1   3   %oparray_pop   1833   1   3   
%oparray_pop   --nostringval--   %errorexec_pop   .runexec2   --nostringval--   
--nostringval--   --nostringval--   2   %stopped_push   --nostringval--   
--nostringval--   --nostringval--
Dictionary stack:
   --dict:735/1123(ro)(G)--   --dict:0/20(G)--   --dict:76/200(L)--   
--dict:14/20(ro)(G)--   --dict:7/30(L)--
Current allocation mode is local
Current file position is 65691
GPL Ghostscript 9.50: Unrecoverable error, exit code 1

The tempfile that error resulted from processing is here:
http://svr.foolswood.co.uk/lilypond-FtbvEQ

The versions of some packages I thought might be involved (in case that's 
helpful):
lilypond 2.19.83 (also tried 2.19.80)
ghostscript 9.50 (also tried 9.26)
guile 2.24
fontconfig 2.13.0-r4
freetype 2.9.1-r3
pango 1.42.4-r2
gcc 9.2.0

Let me know if there's any more information needed, or anything I can help with.
Thanks,
David