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Remove unnecessary param-env from lexical region resolution and fully structural relations

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This commit is contained in:
Michael Goulet
2023-12-18 21:22:39 +00:00
parent e6d6b1d92c
commit 009cd9c815
9 changed files with 28 additions and 68 deletions
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9
compiler/rustc_trait_selection/src/traits/select/mod.rs
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@@ -1226,11 +1226,7 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
if unbound_input_types
&& stack.iter().skip(1).any(|prev| {
stack.obligation.param_env == prev.obligation.param_env
&& self.match_fresh_trait_refs(
stack.fresh_trait_pred,
prev.fresh_trait_pred,
prev.obligation.param_env,
)
&& self.match_fresh_trait_refs(stack.fresh_trait_pred, prev.fresh_trait_pred)
})
{
debug!("evaluate_stack --> unbound argument, recursive --> giving up",);
@@ -2632,9 +2628,8 @@ impl<'tcx> SelectionContext<'_, 'tcx> {
&self,
previous: ty::PolyTraitPredicate<'tcx>,
current: ty::PolyTraitPredicate<'tcx>,
param_env: ty::ParamEnv<'tcx>,
) -> bool {
let mut matcher = MatchAgainstFreshVars::new(self.tcx(), param_env);
let mut matcher = MatchAgainstFreshVars::new(self.tcx());
matcher.relate(previous, current).is_ok()
}