Merge from rustc

Author: The Miri Cronjob Bot

crates/hir-ty/src/display.rs

@@ -1462,7 +1462,7 @@ fn generic_args_sans_defaults<'ga>(
                     // otherwise, if the arg is equal to the param default, hide it (unless the
                     // default is an error which can happen for the trait Self type)
                     #[allow(unstable_name_collisions)]
-                    default_parameters.get(i).is_none_or(|default_parameter| {
+                    IsNoneOr::is_none_or(default_parameters.get(i), |default_parameter| {
                         // !is_err(default_parameter.skip_binders())
                         //     &&
                         arg != &default_parameter.clone().substitute(Interner, &parameters)

crates/hir-ty/src/lib.rs

@@ -15,8 +15,10 @@ extern crate rustc_abi;
 #[cfg(not(feature = "in-rust-tree"))]
 extern crate ra_ap_rustc_abi as rustc_abi;
 
-// Use the crates.io version unconditionally until the API settles enough that we can switch to
-// using the in-tree one.
+#[cfg(feature = "in-rust-tree")]
+extern crate rustc_pattern_analysis;
+
+#[cfg(not(feature = "in-rust-tree"))]
 extern crate ra_ap_rustc_pattern_analysis as rustc_pattern_analysis;
 
 mod builder;