Noisy warnings are printed

[PierrickVoulet]

What version of protobuf and what language are you using?

Version: 3.14.0, C implementation
Language: PHP 7.2, PHP 7.3 , PHP 7.4

What operating system (Linux, Windows, ...) and version?
Linux 64

What did you do?

Run any script that uses the library (e.g. PHPUnit tests)

What did you expect to see

No WARNING: file was already added

What did you see instead?

Several WARNING: file was already added

[witchakorn1999]

@blowmage

[gmatkowski]

Yes i have a same issue which prevents me from running tests :-(

[haberman]

I was able to reproduce this, thanks to help from @PierrickVoulet.

This warning was due to the same proto descriptor being loaded twice. I believe this was due to it being included in multiple aggregated metadata bundles.

The warning message was very unhelpful, which made it very difficult to track down the root cause. I've fixed it to include the name of the file that was being loaded a second time, and where it is being loaded from.

This change is in #8276.