syntax_data: {"ast_node_type":"other","tokens":[{"end":58,"kind":"keyword","start":0,"text":"debug_assert!(!ocx.infcx.next_trait_solver());"}]}
source_snippet:             debug_assert!(!ocx.infcx.next_trait_solver());
context_before:         |ocx, ParamEnvAnd { param_env, value: goal }| {
context_after:             let selcx = &mut SelectionContext::new(ocx.infcx);