FontForge errors in CI logs

[Jean Abou Samra]

Hi,

FontForge messages are appearing in the logs of the Build stage in CI 
pipelines.
Have a look at this one: 
https://gitlab.com/lilypond/lilypond/-/jobs/641609041

Internal Error (overlap) in noteheads.uM3neomensural: Mismatched 
intersection.
|
(669.462,430.017)->(650.002,178.75) ends at (-999999,-999999) while 
(650.002,178.75)->(617.499,179.724) starts at (650.002,178.75)
||
Internal Error (overlap) in noteheads.uM3neomensural: monotonic is both 
needed and unneeded (630.541,427.486)->(650.821,448.141). x=650.001 
(prev=624.031)
||
Internal Error (overlap) in noteheads.uM3neomensural: Winding number did 
not return to 0 when x=650.001
||
Internal Error (overlap) in noteheads.uM3neomensural: monotonic is both 
needed and unneeded (630.541,427.486)->(650.821,448.141). x=650.001 
(prev=624.031)
||
Internal Error (overlap) in noteheads.uM3neomensural: Winding number did 
not return to 0 when x=650.001
||
Internal Error (overlap) in noteheads.uM3neomensural: monotonic is both 
needed and unneeded (630.541,427.486)->(650.821,448.141). x=650.001 
(prev=624.031)
||
Internal Error (overlap) in noteheads.uM3neomensural: Winding number did 
not return to 0 when x=650.001
||
Internal Error (overlap) in noteheads.uM2neomensural: Mismatched 
intersection.
||
(519.46,430.017)->(500,178.75) ends at (-999999,-999999) while 
(500,178.75)->(467.497,179.724) starts at (500,178.75)
||
Internal Error (overlap) in noteheads.uM2neomensural: monotonic is both 
needed and unneeded (480.539,427.486)->(500.819,448.141). x=499.999 
(prev=474.029)
||
Internal Error (overlap) in noteheads.uM2neomensural: Winding number did 
not return to 0 when x=499.999
||
Internal Error (overlap) in noteheads.uM2neomensural: monotonic is both 
needed and unneeded (480.539,427.486)->(500.819,448.141). x=499.999 
(prev=474.029)
||
Internal Error (overlap) in noteheads.uM2neomensural: Winding number did 
not return to 0 when x=499.999
||
Internal Error (overlap) in noteheads.uM2neomensural: monotonic is both 
needed and unneeded (480.539,427.486)->(500.819,448.141). x=499.999 
(prev=474.029)
||
Internal Error (overlap) in noteheads.uM2neomensural: Winding number did 
not return to 0 when x=499.999
||
Internal Error (overlap) in noteheads.urM3neomensural: Mismatched 
intersection.
||
(669.462,430.016)->(650.002,178.75) ends at (-999999,-999999) while 
(650.002,178.75)->(617.499,179.724) starts at (650.002,178.75)
||
Internal Error (overlap) in noteheads.urM3neomensural: monotonic is both 
needed and unneeded (630.541,427.486)->(650.821,448.14). x=650.001 
(prev=624.031)
||
Internal Error (overlap) in noteheads.urM3neomensural: Winding number 
did not return to 0 when x=650.001
||
Internal Error (overlap) in noteheads.urM3neomensural: monotonic is both 
needed and unneeded (630.541,427.486)->(650.821,448.14). x=650.001 
(prev=624.031)
||
Internal Error (overlap) in noteheads.urM3neomensural: Winding number 
did not return to 0 when x=650.001
||
Internal Error (overlap) in noteheads.urM3neomensural: monotonic is both 
needed and unneeded (630.541,427.486)->(650.821,448.14). x=650.001 
(prev=624.031)
||
Internal Error (overlap) in noteheads.urM3neomensural: Winding number 
did not return to 0 when x=650.001
||
Internal Error (overlap) in noteheads.urM2neomensural: Mismatched 
intersection.
||
(519.46,430.016)->(500,178.75) ends at (-999999,-999999) while 
(500,178.75)->(467.497,179.724) starts at (500,178.75)
||
Internal Error (overlap) in noteheads.urM2neomensural: monotonic is both 
needed and unneeded (480.539,427.486)->(500.819,448.14). x=499.999 
(prev=474.029)
||
Internal Error (overlap) in noteheads.urM2neomensural: Winding number 
did not return to 0 when x=499.999
||
Internal Error (overlap) in noteheads.urM2neomensural: monotonic is both 
needed and unneeded (480.539,427.486)->(500.819,448.14). x=499.999 
(prev=474.029)
||
Internal Error (overlap) in noteheads.urM2neomensural: Winding number 
did not return to 0 when x=499.999
||
Internal Error (overlap) in noteheads.urM2neomensural: monotonic is both 
needed and unneeded (480.539,427.486)->(500.819,448.14). x=499.999 
(prev=474.029)|
Internal Error (overlap) in noteheads.urM2neomensural: Winding number 
did not return to 0 when x=499.999|
|

|Looks very much like the failures Owen was already seeing in
https://lists.gnu.org/archive/html/lilypond-devel/2020-06/msg00306.html
|

|Yet, the build succeeds.|

|Should we pay attention to that?
|

|Best,
Jean
|