syntax_data: {"ast_node_type":"other","tokens":[{"end":38,"kind":"keyword","start":0,"text":"early_dcx.early_fatal("}]}
source_snippet:                 early_dcx.early_fatal(
context_before:             if !unstable_opts.unstable_options {
context_after:                     "`-C symbol-mangling-version=legacy` requires `-Z unstable-options`",