syntax_data: {"ast_node_type":"other","tokens":[{"end":69,"kind":"keyword","start":0,"text":"IncrCompSession::InvalidBecauseOfErrors"}]}
source_snippet:             IncrCompSession::InvalidBecauseOfErrors { .. } => return,
context_before:             IncrCompSession::Active { ref session_directory, .. } => session_directory.clone(),
context_after:             _ => panic!("trying to invalidate `IncrCompSession` `{:?}`", *incr_comp_session),