Auto merge of rust-lang#11976 - ehuss:fix-not_found_permutations, r=e…

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Fix flaky not_found_permutations test.

This fixes the `registry::not_found_permutations` test which would randomly fail since the order of http requests was not deterministic. The resolver can issue queries in parallel which can process requests out-of-order.

Fixes rust-lang#11975

tests/testsuite/registry.rs

@@ -3183,13 +3183,14 @@ required by package `foo v0.0.1 ([ROOT]/foo)`
 ",
         )
         .run();
-    let misses = misses.lock().unwrap();
+    let mut misses = misses.lock().unwrap();
+    misses.sort();
     assert_eq!(
         &*misses,
         &[
             "/index/a-/b-/a-b-c",
-            "/index/a_/b-/a_b-c",
             "/index/a-/b_/a-b_c",
+            "/index/a_/b-/a_b-c",
             "/index/a_/b_/a_b_c"
         ]
     );