3682a06dcf
Gracefully handle loop labels missing leading `'` in different positions Fix #81192. * Account for labels when suggesting `loop` instead of `while true` * Suggest `'a` when given `a` only when appropriate * Add loop head span to hir * Tweak error for invalid `break expr` * Add more misspelled label tests * Avoid emitting redundant "unused label" lint * Parse loop labels missing a leading `'` Each commit can be reviewed in isolation.
For high-level intro to how type checking works in rustc, see the type checking chapter of the rustc dev guide.