error[E0425]: cannot find value `missing_ident` in this scope --> $DIR/default-backtrace-ice.rs:21:13 | LL | fn main() { missing_ident; } | ^^^^^^^^^^^^^ not found in this scope aborting due to `-Z treat-err-as-bug=1` stack backtrace: (end_short_backtrace) (begin_short_backtrace) (end_short_backtrace) (begin_short_backtrace) error: the compiler unexpectedly panicked. this is a bug. query stack during panic: #0 [resolver_for_lowering] getting the resolver for lowering end of query stack