Merging upstream version 1.68.2+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 21 insertions, 0 deletions

diff --git a/tests/ui/specialization/README.md b/tests/ui/specialization/README.md
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+This directory contains the test for incorrect usage of specialization that
+should lead to compile failure. Those tests break down into a few categories:
+
+- Feature gating
+  - [On use of the `default` keyword](specialization-feature-gate-default.rs)
+  - [On overlapping impls](specialization-feature-gate-overlap.rs)
+
+- Overlap checking with specialization enabled
+  - [Basic overlap scenarios](specialization-overlap.rs)
+    - Includes purely structural overlap
+    - Includes purely trait-based overlap
+    - Includes mix
+  - [Overlap with differing polarity](specialization-overlap-negative.rs)
+
+- [Attempt to specialize without using `default`](specialization-no-default.rs)
+
+- [Attempt to change impl polarity in a specialization](specialization-polarity.rs)
+
+- Attempt to rely on projection of a `default` type
+  - [Rely on it externally in both generic and monomorphic contexts](specialization-default-projection.rs)
+  - [Rely on it both within an impl and outside it](specialization-default-types.rs)