Note: This is with incremental-comp turned off, and a compiler built yesterday.

Occasionally when working on Diesel's codegen crates, I'll get an error like this:

error: dlsym(0x113560e00, __rustc_derive_registrar__55df2b44c5129c66de0914ff53563457_89): symbol not found --> diesel/src/lib.rs:121:1 | 121 | extern crate diesel_derives2; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 

The only fix when this happens is to cargo clean. It randomly happens when I change some code, but not 100% of the time.