syntax_data: {"ast_node_type":"other","tokens":[{"end":60,"kind":"keyword","start":0,"text":"Invalid"}]}
source_snippet:     Invalid { env_var: &'static str, error: ParseIntError },
context_before:     #[diag(session_apple_deployment_target_invalid)]
context_after:     #[diag(session_apple_deployment_target_too_low)]