s/drain_filter/extract_if/ for Vec, Btree{Map,Set} and LinkedList

compiler/rustc_resolve/src/diagnostics.rs

@@ -2494,7 +2494,7 @@ fn show_candidates(
     for path_strings in [&mut accessible_path_strings, &mut inaccessible_path_strings] {
         path_strings.sort_by(|a, b| a.0.cmp(&b.0));
         let core_path_strings =
-            path_strings.drain_filter(|p| p.0.starts_with("core::")).collect::<Vec<_>>();
+            path_strings.extract_if(|p| p.0.starts_with("core::")).collect::<Vec<_>>();
         path_strings.extend(core_path_strings);
         path_strings.dedup_by(|a, b| a.0 == b.0);
     }

compiler/rustc_resolve/src/late/diagnostics.rs

@@ -496,7 +496,7 @@ impl<'a: 'ast, 'ast, 'tcx> LateResolutionVisitor<'a, '_, 'ast, 'tcx> {
         // Try to filter out intrinsics candidates, as long as we have
         // some other candidates to suggest.
         let intrinsic_candidates: Vec<_> = candidates
-            .drain_filter(|sugg| {
+            .extract_if(|sugg| {
                 let path = path_names_to_string(&sugg.path);
                 path.starts_with("core::intrinsics::") || path.starts_with("std::intrinsics::")
             })

compiler/rustc_resolve/src/lib.rs

@@ -9,7 +9,7 @@
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
 #![feature(assert_matches)]
 #![feature(box_patterns)]
-#![feature(drain_filter)]
+#![feature(extract_if)]
 #![feature(if_let_guard)]
 #![feature(iter_intersperse)]
 #![feature(let_chains)]