Add the edition guide link from the match 2024 migration lint to the error as well

3 files changed, 12 insertions, 0 deletions

diff --git a/compiler/rustc_mir_build/src/thir/pattern/mod.rs b/compiler/rustc_mir_build/src/thir/pattern/mod.rs
index 62bbb31440f..bdf243c87b6 100644
--- a/compiler/rustc_mir_build/src/thir/pattern/mod.rs
+++ b/compiler/rustc_mir_build/src/thir/pattern/mod.rs
@@ -70,6 +70,10 @@ pub(super) fn pat_from_hir<'a, 'tcx>(
         if is_hard_error {
             let mut err =
                 tcx.dcx().struct_span_err(spans, fluent::mir_build_rust_2024_incompatible_pat);
+            if let Some(info) = lint::builtin::RUST_2024_INCOMPATIBLE_PAT.future_incompatible {
+                // provide the same reference link as the lint
+                err.note(format!("for more information, see {}", info.reference));
+            }
             err.subdiagnostic(sugg);
             err.emit();
         } else {
diff --git a/tests/ui/pattern/rfc-3627-match-ergonomics-2024/migration_lint.stderr b/tests/ui/pattern/rfc-3627-match-ergonomics-2024/migration_lint.stderr
index 73b0e4b67d9..83346b9dd4a 100644
--- a/tests/ui/pattern/rfc-3627-match-ergonomics-2024/migration_lint.stderr
+++ b/tests/ui/pattern/rfc-3627-match-ergonomics-2024/migration_lint.stderr
@@ -210,6 +210,7 @@ LL |         (Some(mut x), migration_lint_macros::mixed_edition_pat!(y)) => {
    |               |
    |               requires binding by-value, but the implicit default is by-reference
    |
+   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2024/match-ergonomics.html>
    = note: this error originates in the macro `migration_lint_macros::mixed_edition_pat` (in Nightly builds, run with -Z macro-backtrace for more info)
 help: make the implied reference pattern explicit
    |
diff --git a/tests/ui/pattern/rfc-3627-match-ergonomics-2024/min_match_ergonomics_fail.stderr b/tests/ui/pattern/rfc-3627-match-ergonomics-2024/min_match_ergonomics_fail.stderr
index 38de6e34cbc..affdca1d449 100644
--- a/tests/ui/pattern/rfc-3627-match-ergonomics-2024/min_match_ergonomics_fail.stderr
+++ b/tests/ui/pattern/rfc-3627-match-ergonomics-2024/min_match_ergonomics_fail.stderr
@@ -105,6 +105,7 @@ error: this pattern relies on behavior which may change in edition 2024
 LL | test_pat_on_type![(&x,): &(&T,)];
    |                    ^ cannot implicitly match against multiple layers of reference
    |
+   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2024/match-ergonomics.html>
 help: make the implied reference pattern explicit
    |
 LL | test_pat_on_type![&(&x,): &(&T,)];
@@ -116,6 +117,7 @@ error: this pattern relies on behavior which may change in edition 2024
 LL | test_pat_on_type![(&mut x,): &(&mut T,)];
    |                    ^^^^ cannot implicitly match against multiple layers of reference
    |
+   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2024/match-ergonomics.html>
 help: make the implied reference pattern explicit
    |
 LL | test_pat_on_type![&(&mut x,): &(&mut T,)];
@@ -127,6 +129,7 @@ error: this pattern relies on behavior which may change in edition 2024
 LL | test_pat_on_type![Foo { f: &(x,) }: &Foo];
    |                            ^ cannot implicitly match against multiple layers of reference
    |
+   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2024/match-ergonomics.html>
 help: make the implied reference pattern explicit
    |
 LL | test_pat_on_type![&Foo { f: &(x,) }: &Foo];
@@ -138,6 +141,7 @@ error: this pattern relies on behavior which may change in edition 2024
 LL | test_pat_on_type![(mut x,): &(T,)];
    |                    ^^^ requires binding by-value, but the implicit default is by-reference
    |
+   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2024/match-ergonomics.html>
 help: make the implied reference pattern explicit
    |
 LL | test_pat_on_type![&(mut x,): &(T,)];
@@ -149,6 +153,7 @@ error: this pattern relies on behavior which may change in edition 2024
 LL | test_pat_on_type![(ref x,): &(T,)];
    |                    ^^^ cannot override to bind by-reference when that is the implicit default
    |
+   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2024/match-ergonomics.html>
 help: make the implied reference pattern explicit
    |
 LL | test_pat_on_type![&(ref x,): &(T,)];
@@ -160,6 +165,7 @@ error: this pattern relies on behavior which may change in edition 2024
 LL | test_pat_on_type![(ref mut x,): &mut (T,)];
    |                    ^^^^^^^ cannot override to bind by-reference when that is the implicit default
    |
+   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2024/match-ergonomics.html>
 help: make the implied reference pattern explicit
    |
 LL | test_pat_on_type![&mut (ref mut x,): &mut (T,)];
@@ -171,6 +177,7 @@ error: this pattern relies on behavior which may change in edition 2024
 LL |         (&x,) => x,
    |          ^ cannot implicitly match against multiple layers of reference
    |
+   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2024/match-ergonomics.html>
 help: make the implied reference pattern explicit
    |
 LL |         &(&x,) => x,