5ac0b2d021
Revert "Auto merge of #122140 - oli-obk:track_errors13, r=davidtwco" This reverts commit 65cd843ae06ad00123c131a431ed5304e4cd577a, reversing changes made to d255c6a57c393db6221b1ff700daea478436f1cd. reverts https://github.com/rust-lang/rust/pull/122140 It was a large regression in wall time due to trashing CPU caches
For high-level intro to how type checking works in rustc, see the type checking chapter of the rustc dev guide.