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This is true but misleading: analogously, typechecking depends on parsing, but IDEs typically make a best effort to typecheck syntactically ill-formed programs.

• estebank 2y ago
  rustc does its best to recover, continue and provide diagnostics from later stages. But at the same time it is better to provide a single early error and mark the entire node as recovered to avoid further errors at the cost of requiring more cycles of back and forth, over the alternative of tons of useless knock down errors that drown the underlying cause of the problem. We are always on the lookout for improving in this area. Having examples of cases where we conceivably should have done better but didn't is useful. As mentioned already, the complexity here is that doing the right thing for the user requires architecting multiple separate stages of the compiler to talk to each other in way more complex ways than originally intended.