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-rw-r--r--compiler/rustc_lint/messages.ftl3
-rw-r--r--compiler/rustc_lint/src/early/diagnostics.rs1
-rw-r--r--compiler/rustc_lint/src/lints.rs4
-rw-r--r--compiler/rustc_lint_defs/src/builtin.rs39
-rw-r--r--compiler/rustc_lint_defs/src/lib.rs1
-rw-r--r--compiler/rustc_metadata/messages.ftl3
-rw-r--r--compiler/rustc_metadata/src/creader.rs7
-rw-r--r--compiler/rustc_metadata/src/errors.rs7
-rw-r--r--tests/ui/wasm/wasm-bindgen-broken-error.rs28
-rw-r--r--tests/ui/wasm/wasm-bindgen-broken-error.v0_1_0.stderr8
-rw-r--r--tests/ui/wasm/wasm-bindgen-broken-error.v0_2_87.stderr8
11 files changed, 55 insertions, 54 deletions
diff --git a/compiler/rustc_lint/messages.ftl b/compiler/rustc_lint/messages.ftl
index 7e64f7f002f..0c1bd08474f 100644
--- a/compiler/rustc_lint/messages.ftl
+++ b/compiler/rustc_lint/messages.ftl
@@ -974,6 +974,3 @@ lint_uses_power_alignment = repr(C) does not follow the power alignment rule. Th
 
 lint_variant_size_differences =
     enum variant is more than three times larger ({$largest} bytes) than the next largest
-
-lint_wasm_c_abi =
-    older versions of the `wasm-bindgen` crate will be incompatible with future versions of Rust; please update to `wasm-bindgen` v0.2.88
diff --git a/compiler/rustc_lint/src/early/diagnostics.rs b/compiler/rustc_lint/src/early/diagnostics.rs
index 6d73715562b..92dbc76a7b5 100644
--- a/compiler/rustc_lint/src/early/diagnostics.rs
+++ b/compiler/rustc_lint/src/early/diagnostics.rs
@@ -430,7 +430,6 @@ pub(super) fn decorate_lint(
         BuiltinLintDiag::UnusedCrateDependency { extern_crate, local_crate } => {
             lints::UnusedCrateDependency { extern_crate, local_crate }.decorate_lint(diag)
         }
-        BuiltinLintDiag::WasmCAbi => lints::WasmCAbi.decorate_lint(diag),
         BuiltinLintDiag::IllFormedAttributeInput { suggestions } => {
             lints::IllFormedAttributeInput {
                 num_suggestions: suggestions.len(),
diff --git a/compiler/rustc_lint/src/lints.rs b/compiler/rustc_lint/src/lints.rs
index 0b7d1f45f2a..3163bc8a300 100644
--- a/compiler/rustc_lint/src/lints.rs
+++ b/compiler/rustc_lint/src/lints.rs
@@ -2554,10 +2554,6 @@ pub(crate) struct UnusedCrateDependency {
 }
 
 #[derive(LintDiagnostic)]
-#[diag(lint_wasm_c_abi)]
-pub(crate) struct WasmCAbi;
-
-#[derive(LintDiagnostic)]
 #[diag(lint_ill_formed_attribute_input)]
 pub(crate) struct IllFormedAttributeInput {
     pub num_suggestions: usize,
diff --git a/compiler/rustc_lint_defs/src/builtin.rs b/compiler/rustc_lint_defs/src/builtin.rs
index 5cdd18f5ea9..8bf01adc5b5 100644
--- a/compiler/rustc_lint_defs/src/builtin.rs
+++ b/compiler/rustc_lint_defs/src/builtin.rs
@@ -144,7 +144,6 @@ declare_lint_pass! {
         UNUSED_VARIABLES,
         USELESS_DEPRECATED,
         WARNINGS,
-        WASM_C_ABI,
         // tidy-alphabetical-end
     ]
 }
@@ -4682,44 +4681,6 @@ declare_lint! {
 }
 
 declare_lint! {
-    /// The `wasm_c_abi` lint detects crate dependencies that are incompatible
-    /// with future versions of Rust that will emit spec-compliant C ABI.
-    ///
-    /// ### Example
-    ///
-    /// ```rust,ignore (needs extern crate)
-    /// #![deny(wasm_c_abi)]
-    /// ```
-    ///
-    /// This will produce:
-    ///
-    /// ```text
-    /// error: the following packages contain code that will be rejected by a future version of Rust: wasm-bindgen v0.2.87
-    ///   |
-    /// note: the lint level is defined here
-    ///  --> src/lib.rs:1:9
-    ///   |
-    /// 1 | #![deny(wasm_c_abi)]
-    ///   |         ^^^^^^^^^^
-    /// ```
-    ///
-    /// ### Explanation
-    ///
-    /// Rust has historically emitted non-spec-compliant C ABI. This has caused
-    /// incompatibilities between other compilers and Wasm targets. In a future
-    /// version of Rust this will be fixed and therefore dependencies relying
-    /// on the non-spec-compliant C ABI will stop functioning.
-    pub WASM_C_ABI,
-    Deny,
-    "detects dependencies that are incompatible with the Wasm C ABI",
-    @future_incompatible = FutureIncompatibleInfo {
-        reason: FutureIncompatibilityReason::FutureReleaseErrorReportInDeps,
-        reference: "issue #71871 <https://github.com/rust-lang/rust/issues/71871>",
-    };
-    crate_level_only
-}
-
-declare_lint! {
     /// The `uncovered_param_in_projection` lint detects a violation of one of Rust's orphan rules for
     /// foreign trait implementations that concerns the use of type parameters inside trait associated
     /// type paths ("projections") whose output may not be a local type that is mistakenly considered
diff --git a/compiler/rustc_lint_defs/src/lib.rs b/compiler/rustc_lint_defs/src/lib.rs
index 9f4c5d89d0e..3f1e98556ef 100644
--- a/compiler/rustc_lint_defs/src/lib.rs
+++ b/compiler/rustc_lint_defs/src/lib.rs
@@ -795,7 +795,6 @@ pub enum BuiltinLintDiag {
         extern_crate: Symbol,
         local_crate: Symbol,
     },
-    WasmCAbi,
     IllFormedAttributeInput {
         suggestions: Vec<String>,
     },
diff --git a/compiler/rustc_metadata/messages.ftl b/compiler/rustc_metadata/messages.ftl
index 6d7d88fa8d7..d2b5ae53185 100644
--- a/compiler/rustc_metadata/messages.ftl
+++ b/compiler/rustc_metadata/messages.ftl
@@ -290,6 +290,9 @@ metadata_unsupported_abi =
 metadata_unsupported_abi_i686 =
     ABI not supported by `#[link(kind = "raw-dylib")]` on i686
 
+metadata_wasm_c_abi =
+    older versions of the `wasm-bindgen` crate are incompatible with current versions of Rust; please update to `wasm-bindgen` v0.2.88
+
 metadata_wasm_import_form =
     wasm import module must be of the form `wasm_import_module = "string"`
 
diff --git a/compiler/rustc_metadata/src/creader.rs b/compiler/rustc_metadata/src/creader.rs
index a6db12f8932..a6cd0ecafd0 100644
--- a/compiler/rustc_metadata/src/creader.rs
+++ b/compiler/rustc_metadata/src/creader.rs
@@ -1076,12 +1076,7 @@ impl<'a, 'tcx> CrateLoader<'a, 'tcx> {
             // Make a point span rather than covering the whole file
             let span = krate.spans.inner_span.shrink_to_lo();
 
-            self.sess.psess.buffer_lint(
-                lint::builtin::WASM_C_ABI,
-                span,
-                ast::CRATE_NODE_ID,
-                BuiltinLintDiag::WasmCAbi,
-            );
+            self.sess.dcx().emit_err(errors::WasmCAbi { span });
         }
     }
 
diff --git a/compiler/rustc_metadata/src/errors.rs b/compiler/rustc_metadata/src/errors.rs
index b6c5619ec18..cefc6498f68 100644
--- a/compiler/rustc_metadata/src/errors.rs
+++ b/compiler/rustc_metadata/src/errors.rs
@@ -732,3 +732,10 @@ pub struct ImportNameTypeRaw {
     #[primary_span]
     pub span: Span,
 }
+
+#[derive(Diagnostic)]
+#[diag(metadata_wasm_c_abi)]
+pub(crate) struct WasmCAbi {
+    #[primary_span]
+    pub span: Span,
+}
diff --git a/tests/ui/wasm/wasm-bindgen-broken-error.rs b/tests/ui/wasm/wasm-bindgen-broken-error.rs
new file mode 100644
index 00000000000..d985e879803
--- /dev/null
+++ b/tests/ui/wasm/wasm-bindgen-broken-error.rs
@@ -0,0 +1,28 @@
+//@ only-wasm32
+//@ revisions: v0_1_0 v0_2_87 v0_2_88 v0_3_0 v1_0_0
+//@[v0_1_0] check-fail
+//@[v0_1_0] rustc-env:CARGO_PKG_VERSION_MAJOR=0
+//@[v0_1_0] rustc-env:CARGO_PKG_VERSION_MINOR=1
+//@[v0_1_0] rustc-env:CARGO_PKG_VERSION_PATCH=0
+//@[v0_2_87] check-fail
+//@[v0_2_87] rustc-env:CARGO_PKG_VERSION_MAJOR=0
+//@[v0_2_87] rustc-env:CARGO_PKG_VERSION_MINOR=2
+//@[v0_2_87] rustc-env:CARGO_PKG_VERSION_PATCH=87
+//@[v0_2_88] check-pass
+//@[v0_2_88] rustc-env:CARGO_PKG_VERSION_MAJOR=0
+//@[v0_2_88] rustc-env:CARGO_PKG_VERSION_MINOR=2
+//@[v0_2_88] rustc-env:CARGO_PKG_VERSION_PATCH=88
+//@[v0_3_0] check-pass
+//@[v0_3_0] rustc-env:CARGO_PKG_VERSION_MAJOR=0
+//@[v0_3_0] rustc-env:CARGO_PKG_VERSION_MINOR=3
+//@[v0_3_0] rustc-env:CARGO_PKG_VERSION_PATCH=0
+//@[v1_0_0] check-pass
+//@[v1_0_0] rustc-env:CARGO_PKG_VERSION_MAJOR=1
+//@[v1_0_0] rustc-env:CARGO_PKG_VERSION_MINOR=0
+//@[v1_0_0] rustc-env:CARGO_PKG_VERSION_PATCH=0
+
+#![crate_name = "wasm_bindgen"]
+//[v0_1_0]~^ ERROR: older versions of the `wasm-bindgen` crate
+//[v0_2_87]~^^ ERROR: older versions of the `wasm-bindgen` crate
+
+fn main() {}
diff --git a/tests/ui/wasm/wasm-bindgen-broken-error.v0_1_0.stderr b/tests/ui/wasm/wasm-bindgen-broken-error.v0_1_0.stderr
new file mode 100644
index 00000000000..e1c1ec7ef33
--- /dev/null
+++ b/tests/ui/wasm/wasm-bindgen-broken-error.v0_1_0.stderr
@@ -0,0 +1,8 @@
+error: older versions of the `wasm-bindgen` crate are incompatible with current versions of Rust; please update to `wasm-bindgen` v0.2.88
+  --> $DIR/wasm-bindgen-broken-error.rs:24:1
+   |
+LL | #![crate_name = "wasm_bindgen"]
+   | ^
+
+error: aborting due to 1 previous error
+
diff --git a/tests/ui/wasm/wasm-bindgen-broken-error.v0_2_87.stderr b/tests/ui/wasm/wasm-bindgen-broken-error.v0_2_87.stderr
new file mode 100644
index 00000000000..e1c1ec7ef33
--- /dev/null
+++ b/tests/ui/wasm/wasm-bindgen-broken-error.v0_2_87.stderr
@@ -0,0 +1,8 @@
+error: older versions of the `wasm-bindgen` crate are incompatible with current versions of Rust; please update to `wasm-bindgen` v0.2.88
+  --> $DIR/wasm-bindgen-broken-error.rs:24:1
+   |
+LL | #![crate_name = "wasm_bindgen"]
+   | ^
+
+error: aborting due to 1 previous error
+
generated by cgit-pink 1.4.1-3-g733a5 (git 2.37.1) at 2026-01-13 08:12:10 +0000