From 3d72138740ed8c3ec9f733ace10fd40af0ff77eb Mon Sep 17 00:00:00 2001
From: Brent Westbrook <36778786+ntBre@users.noreply.github.com>
Date: Fri, 28 Feb 2025 03:58:22 -0500
Subject: [PATCH] Check `LinterSettings::preview` for version-related syntax
 errors (#16429)

---
 crates/ruff_server/src/lint.rs | 8 +++++++-
 crates/ruff_wasm/src/lib.rs    | 8 +++++++-
 crates/ruff_wasm/tests/api.rs  | 2 +-
 3 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/crates/ruff_server/src/lint.rs b/crates/ruff_server/src/lint.rs
index 53cff99ad3..1a0a2bb597 100644
--- a/crates/ruff_server/src/lint.rs
+++ b/crates/ruff_server/src/lint.rs
@@ -172,6 +172,12 @@ pub(crate) fn check(
             )
         });
 
+    let unsupported_syntax_errors = if settings.linter.preview.is_enabled() {
+        parsed.unsupported_syntax_errors()
+    } else {
+        &[]
+    };
+
     let lsp_diagnostics = lsp_diagnostics.chain(
         show_syntax_errors
             .then(|| {
@@ -186,7 +192,7 @@ pub(crate) fn check(
                             encoding,
                         )
                     })
-                    .chain(parsed.unsupported_syntax_errors().iter().map(|error| {
+                    .chain(unsupported_syntax_errors.iter().map(|error| {
                         unsupported_syntax_error_to_lsp_diagnostic(
                             error,
                             &source_kind,
diff --git a/crates/ruff_wasm/src/lib.rs b/crates/ruff_wasm/src/lib.rs
index 9949914ac0..aa0929deed 100644
--- a/crates/ruff_wasm/src/lib.rs
+++ b/crates/ruff_wasm/src/lib.rs
@@ -205,6 +205,12 @@ impl Workspace {
 
         let source_code = locator.to_source_code();
 
+        let unsupported_syntax_errors = if self.settings.linter.preview.is_enabled() {
+            parsed.unsupported_syntax_errors()
+        } else {
+            &[]
+        };
+
         let messages: Vec<ExpandedMessage> = diagnostics
             .into_iter()
             .map(|diagnostic| {
@@ -242,7 +248,7 @@ impl Workspace {
                     fix: None,
                 }
             }))
-            .chain(parsed.unsupported_syntax_errors().iter().map(|error| {
+            .chain(unsupported_syntax_errors.iter().map(|error| {
                 let start_location = source_code.source_location(error.range.start());
                 let end_location = source_code.source_location(error.range.end());
 
diff --git a/crates/ruff_wasm/tests/api.rs b/crates/ruff_wasm/tests/api.rs
index 650791540f..4211e6fe69 100644
--- a/crates/ruff_wasm/tests/api.rs
+++ b/crates/ruff_wasm/tests/api.rs
@@ -65,7 +65,7 @@ fn syntax_error() {
 fn unsupported_syntax_error() {
     check!(
         "match 2:\n    case 1: ...",
-        r#"{}"#,
+        r#"{"preview": true}"#,
         [ExpandedMessage {
             code: None,
             message: "SyntaxError: Cannot use `match` statement on Python 3.9 (syntax was added in Python 3.10)".to_string(),