Use case

A sandoxed system script doesn't support multiple assignments (with Tuples):

def (a, b) = [1,2]
println a

Returns:

ERROR: Build step failed with exception 
org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed: 
General error during canonicalization: not supporting tuples yet

• This is working in non sandboxed mode, but not in sandboxed mode.
• Reproduced on the latest OSS LTS (2.138.3), with Groovy Plugin version 2.0 and Script Security Plugin version 1.49.

workaround

Do not use multiple assignments.

Note

It is supported in a Pipeline (as of workflow-cps 2.46, JENKINS-45575). It also works in non sandboxed mode.