[JENKINS-61043] @Grab ignores package version if bundled in plugin

[jenkins-infra-bot]

When using @​Grab with a package that is already bundled inside a plugin, the version inside the plugin is used instead of the one defined in @​Grab.

Example to reproduce:

1. Install Blue Ocean plugin (1.22.0) on vanilla Jenkins (2.204.2) (make sure AWS Steps plugin is not installed).
2. Create a pipeline job with the following content and disabled sandbox:

@​Grab('org.yaml:snakeyaml:1.19')
import org.yaml.snakeyaml.LoaderOptions
LoaderOptions options = new LoaderOptions()
options.setAllowDuplicateKeys(false)

Result:

hudson.remoting.ProxyException: groovy.lang.MissingMethodException: No signature of method: org.yaml.snakeyaml.LoaderOptions.setAllowDuplicateKeys() is applicable for argument types: (java.lang.Boolean) values: [false]

 Without Blue Ocean plugin installed the job is able to execute the method.

---

Originally reported by terbs, imported from: @Grab ignores package version if bundled in plugin

• assignee: vjuranek
• status: Open
• priority: Major
• component(s): workflow-cps-global-lib-plugin
• resolution: Unresolved
• votes: 0
• watchers: 2
• imported: 20251212-090250

Raw content of original issue

When using @Grab with a package that is already bundled inside a plugin, the version inside the plugin is used instead of the one defined in @Grab.

Example to reproduce:

	
Install Blue Ocean plugin (1.22.0) on vanilla Jenkins (2.204.2) (make sure AWS Steps plugin is not installed).
	
Create a pipeline job with the following content and disabled sandbox:




@Grab('org.yaml:snakeyaml:1.19')
import org.yaml.snakeyaml.LoaderOptions
LoaderOptions options = new LoaderOptions()
options.setAllowDuplicateKeys(false)


Result:

hudson.remoting.ProxyException: groovy.lang.MissingMethodException: No signature of method: org.yaml.snakeyaml.LoaderOptions.setAllowDuplicateKeys() is applicable for argument types: (java.lang.Boolean) values: [false]

 Without Blue Ocean plugin installed the job is able to execute the method.