julia

1ed6a9f0 - Try giving some more informative errors for various malformed input (#54458)

Try giving some more informative errors for various malformed input (#54458) I was playing with generating some code for OpaqueClosures. It's pretty easy to generate IR that will pass the verifier, but cause assertion errors in codegen. This tries to make the experience slightly nicer by turning some of them into proper error messages (thus letting the runtime discover, so that e.g. the code can be inspected at the REPL) rather than assertions.