Rust compiler do not provide useful information when there are unsatisfied constraints inside CGP component wiring

[soareschen]

Currently, when there is any unsatisfied constraint inside a context-generic provider implementation, it is not shown in the error message when trying to implement a consumer trait. Due to the indirection through blanket implementations, Rust only prints an unhelpful message that the blanket implementation is not implemented without explaining why. More details about this issue is explained in the debugging chapter of CGP book.

There is not much we can do within this project to fix the issue. Instead, this has been reported to the Rust project at rust-lang/rust#134346, with a fix PR available at rust-lang/rust#134348. This serves as a tracking issue for tracking the progress of fixing this at the Rust compiler.