migrate: `UnknownTool` error to `SessionDiagnostic`

1 files changed, 13 insertions, 0 deletions

diff --git a/compiler/rustc_lint/src/errors.rs b/compiler/rustc_lint/src/errors.rs
new file mode 100644
index 00000000000..3f4d856a1cc
--- /dev/null
+++ b/compiler/rustc_lint/src/errors.rs
@@ -0,0 +1,13 @@
+use rustc_macros::SessionDiagnostic;
+use rustc_span::Span;
+
+#[derive(SessionDiagnostic)]
+#[error(lint::unknown_tool, code = "E0710")]
+pub struct UnknownTool {
+    #[primary_span]
+    pub span: Option<Span>,
+    pub tool_name: String,
+    pub lint_name: String,
+    #[help]
+    pub is_nightly_build: Option<()>,
+}