syntax_data: {"ast_node_type":"other","tokens":[{"end":67,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:     // no shared type inference going on here. I feel like it would
context_before:     // FIXME(@lcnr): Why does this use an `infcx`, there should be
context_after:     // clearer to manually construct one where necessary or to provide