error: crate `NonSnakeCase` should have a snake case name
  --> $DIR/lint-non-snake-case-crate-proc-macro.rs:3:18
   |
LL | #![crate_name = "NonSnakeCase"]
   |                  ^^^^^^^^^^^^ help: convert the identifier to snake case: `non_snake_case`
   |
note: the lint level is defined here
  --> $DIR/lint-non-snake-case-crate-proc-macro.rs:5:9
   |
LL | #![deny(non_snake_case)]
   |         ^^^^^^^^^^^^^^

error: aborting due to 1 previous error