[JENKINS-55001] Sandboxed System Groovy Scripts don't support multiple assignments (with Tuples)

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.

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Originally reported by pierrebtz, imported from: Sandboxed System Groovy Scripts don't support multiple assignments (with Tuples)

• status: Open
  
• priority: Major
  
• component(s): script-security-plugin
  
• resolution: Unresolved
  
• votes: 3
  
• watchers: 5
  
• imported: 2025-12-09
  

Raw content of original issue

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.