Bug 929010 – portage fails with circular dependencies error, but message is empty

• Status: UNCONFIRMED
• Product: Portage Development

[Description Gasc Henri 2024-04-09 15:10:51 UTC]

When updating @world, portage 3.0.63 fails with error "circular dependencies", but the content of the error is:

```
Total: 55 packages (4 upgrades, 1 in new slot, 50 reinstalls, 47 binaries), Size of downloads: 0 KiB

 * Error: circular dependencies:




 * Note that circular dependencies can often be avoided by temporarily
 * disabling USE flags that trigger optional dependencies.
```

This error happens after setting PYTHON_TARGETS="python3_10 python3_11 python3_12" in make.conf

Reproducible: Always

Steps to Reproduce:
1. emerge -uDN @world
2.
3.
Actual Results:  
An empty error message

Expected Results:  
Portage should show the circular dependencies

I am creating a test environment like in https://wiki.gentoo.org/wiki/Chroot_for_package_testing and found this. I will attach /var/cache/binpkgs/Packages and emerge --info

[Comment 1 Gasc Henri 2024-04-09 15:13:15 UTC]

Created attachment 890070 [details]
emerge --info --verbose

[Comment 2 Gasc Henri 2024-04-09 15:16:07 UTC]

Created attachment 890071 [details]
/var/cache/binpkgs/Packages

[Comment 3 Gasc Henri 2024-04-09 15:18:01 UTC]

Created attachment 890072 [details]
emerge -uDN @world

emerge -uDN @world > temp 2>&1