syntax_data: {"ast_node_type":"other","tokens":[{"end":71,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:     // of the directory where `librustc_driver` is located, rather than
context_before:     // to lib64/lib32. This would be more foolproof by basing the sysroot off
context_after:     // where the rustc binary is.