syntax_data: {"ast_node_type":"other","tokens":[{"end":22,"kind":"keyword","start":0,"text":"eprintln!("}]}
source_snippet:             eprintln!(
context_before:         self.try_new_source_file(filename, src).unwrap_or_else(|OffsetOverflowError| {
context_after:                 "fatal error: rustc does not support text files larger than {} bytes",