{"ast_node_type":"other","tokens":[{"end":66,"kind":"keyword","start":0,"text":"//"}]}
// produces a `RustcVersion` literal containing that version (e.g.
// Reads the rust version (e.g. "1.75.0") from the CFG_RELEASE env var and
// `RustcVersion { major: 1, minor: 75, patch: 0 }`).