syntax_data: {"ast_node_type":"other","tokens":[{"end":84,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// goal without its cycle head on the stack. For more details, see the relevant
context_before:     /// provisional cache entry is involved in would stay the same when computing the
context_after:     /// [rustc-dev-guide chapter](https://rustc-dev-guide.rust-lang.org/solve/caching.html).