Regression: Sized not satisfied

[alexcrichton]

A stable-to-beta crater report shows regressions related to

error[E0277]�(B: the trait bound `Self: std::marker::Sized` is not satisfied�(B 

• cfg-regex-0.0.0 (before) (after)
• lense-0.1.2 (before) (after)
• mel-0.2.1 (before) (after)
• rendarray-0.2.0-alpha.8 (before) (after)
• sprs-ldl-0.1.0 (before) (after)
• vectormath-0.1.1 (before) (after)

I'm opening an issue to ensure that we're tracking these regressions and they're either expected (so we can close), this is a dupe (so we can close), or we can fix (and then close!)

cc @rust-lang/compiler

[nikomatsakis]

This is related to #33242. We turned that warning into a hard error in #34982, which included a thorough survey of users (some of which are listed above).

[nikomatsakis]

In other words: expected. :)

[alexcrichton]

Yay! In that case I'll close this in favor of the previous discussions