LoadError: Method overwriting is not permitted during Module precompile

[singularitti]

I'm seeing a ERROR: LoadError: Method overwriting is not permitted during Module precompile. on Julia v1.10.0-beta1 when precompiling my package. It did not happen on v1.9. Is there a behavioral change that was not mentioned in NEWS.md?

[vtjnash]

It has always given a fatal error warning, so it is not a news change. But recently things got more crash-y for people that missed the warning (previously it continued so you could see all of the warnings at once, but now it just exits immediately at the first code mistake), so we made it fail more clearly, to help code authors see that more easily on CI runs.

[vtjnash]

It also is a failure on v1.9 and earlier

[singularitti]

It is. But I could load my package without error on v1.9 and earlier.

[timholy]

The package ecosystem can become completely broken by method overwriting, so this indeed should be an error. You should make the changes to your code.

[vtjnash]

It did error in v1.9 too, you just didn't read or ignored it.

[singularitti]

It did error, but I was still able to load the package.