[JENKINS-45549] unable to stash in pipeline in readonly dir

the following code generates IOException:

dir($READONLY_DIR){

stash name: abc, includes:$SOMEFILE

}

running into error:

java.io.IOException: Failed to mkdirs: $READONLY_DIR@​tmp/durable-XXXXXXXX

seems stash is trying to create dir with the dir given in context here

there are workaround of this (e.g. write to a different file) but I feel this can be solved by adding a parameter to control where that tmp file is stored.

---
Originally reported by shiqiyang, imported from: unable to stash in pipeline in readonly dir

• status: Open
  
• priority: Minor
  
• component(s): workflow-basic-steps-plugin, workflow-durable-task-step-plugin
  
• resolution: Unresolved
  
• votes: 0
  
• watchers: 2
  
• imported: 20251212-090250
  

Raw content of original issue

the following code generates IOException:


dir($READONLY_DIR){

  stash name: abc, includes:$SOMEFILE

}


running into error:

java.io.IOException: Failed to mkdirs: $READONLY_DIR@tmp/durable-XXXXXXXX


seems stash is trying to create dir with the dir given in context here

there are workaround of this (e.g. write to a different file) but I feel this can be solved by adding a parameter to control where that tmp file is stored.

environment

```
jenkins 2.46.3

pipeline 2.5
```