Bugs like that in a production compiler could be worrying. In a compiler for a language still being defined, not so much. Compare Rust 1.0 vs 1.71 to see how mu

Bugs like that in a production compiler could be worrying. In a compiler for a language still being defined, not so much. Compare Rust 1.0 vs 1.71 to see how much of a gulf there is between "first stable release" and "compiler of a stable language with lots of real world usage". Self hosting is also not the be-all and end-all. It is a symbolic milestone, more than anything. Achieving it is something to celebrate, but not something to hold against the language until much later on their development cycle, if at all.