[JENKINS-59008] Merge before build, reference is not a tree on second build

Pipeline Jenkins build with

SCM: GIT

Branches to build: refs/tags/*_${RELEASE}_feature

Additional Behaviours: Merge before build

 

first polled build is ok (change is detected and merged), see log

second build triggered by hand gets error (no change), see log

 

---
Originally reported by petekol, imported from: Merge before build, reference is not a tree on second build

• status: Open
  
• priority: Major
  
• component(s): git-plugin
  
• resolution: Unresolved
  
• votes: 0
  
• watchers: 2
  
• imported: 2025-12-02
  

Raw content of original issue

Pipeline Jenkins build with


SCM: GIT


Branches to build: refs/tags/*_${RELEASE}_feature


Additional Behaviours: Merge before build


 


first polled build is ok (change is detected and merged), see log


second build triggered by hand gets error (no change), see log


 

environment

```
2.176.2

git-plugin 2.8.0
```

4 attachments

- [Jenkinsfile](https://issues.jenkins.io/secure/attachment/48410/Jenkinsfile)
- [config.xml](https://issues.jenkins.io/secure/attachment/48383/config.xml)
- [first-good.txt](https://issues.jenkins.io/secure/attachment/48371/first-good.txt)
- [second-bad.txt](https://issues.jenkins.io/secure/attachment/48370/second-bad.txt)