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try_execute_query

rustc_query_impl::execution

Function try_execute_query 

Source 
fn try_execute_query<'tcx, C: QueryCache, const FLAGS: QueryFlags, const INCR: bool>(
    query: SemiDynamicQueryDispatcher<'tcx, C, FLAGS>,
    qcx: QueryCtxt<'tcx>,
    span: Span,
    key: C::Key,
    dep_node: Option<DepNode>,
) -> (C::Value, Option<DepNodeIndex>)