Rename lint

compiler/rustc_lint/src/lib.rs

@@ -325,6 +325,7 @@ fn register_builtins(store: &mut LintStore, no_interleave_lints: bool) {
     store.register_renamed("redundant_semicolon", "redundant_semicolons");
     store.register_renamed("overlapping_patterns", "overlapping_range_endpoints");
     store.register_renamed("safe_packed_borrows", "unaligned_references");
+    store.register_renamed("disjoint_capture_migration", "rust_2021_incompatible_closure_captures");
 
     // These were moved to tool lints, but rustc still sees them when compiling normally, before
     // tool lints are registered, so `check_tool_name_for_backwards_compat` doesn't work. Use

src/test/ui/closures/2229_closure_analysis/migrations/old_name.rs

@@ -0,0 +1,9 @@
+// check-pass
+
+// Ensure that the old name for `rust_2021_incompatible_closure_captures` is still
+// accepted by the compiler
+
+#![allow(disjoint_capture_migration)]
+//~^ WARN lint `disjoint_capture_migration` has been renamed
+
+fn main() {}

src/test/ui/closures/2229_closure_analysis/migrations/old_name.stderr

@@ -0,0 +1,10 @@
+warning: lint `disjoint_capture_migration` has been renamed to `rust_2021_incompatible_closure_captures`
+  --> $DIR/old_name.rs:6:10
+   |
+LL | #![allow(disjoint_capture_migration)]
+   |          ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `rust_2021_incompatible_closure_captures`
+   |
+   = note: `#[warn(renamed_and_removed_lints)]` on by default
+
+warning: 1 warning emitted
+