I noticed a few days ago with a snapshot and also see this now when building 5.9.0 from scratch that the UDUNITS section is showing some warnings. Perhaps due to #1461?

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Task :udunits:compileJavacc
Java Compiler Compiler Version 7.0.13 (Parser Generator)
(type "javacc" with no arguments for help)
Reading from file /some/path/netcdf-java-5.9.0/udunits/src/main/javacc/StandardUnitFormat.jj . . .
Warning: Choice conflict in (...)* construct at line 562, column 5.
Expansion nested within construct and expansion following construct
have common prefixes, one of which is:
Consider using a lookahead of 2 or more for nested expansion.
Warning: Choice conflict in [...] construct at line 570, column 13.
Expansion nested within construct and expansion following construct
have common prefixes, one of which is: "."
Consider using a lookahead of 2 or more for nested expansion.
Warning: Choice conflict in [...] construct at line 594, column 5.
Expansion nested within construct and expansion following construct
have common prefixes, one of which is: "+"
Consider using a lookahead of 2 or more for nested expansion.
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