close parallel for lints

Author: SparrowLii

compiler/rustc_lint/src/late.rs

@@ -436,24 +436,32 @@ pub fn check_crate<'tcx, T: LateLintPass<'tcx> + 'tcx>(
     tcx: TyCtxt<'tcx>,
     builtin_lints: impl FnOnce() -> T + Send + DynSend,
 ) {
-    join(
-        || {
-            tcx.sess.time("crate_lints", || {
-                // Run whole crate non-incremental lints
-                late_lint_crate(tcx, builtin_lints());
-            });
-        },
-        || {
-            tcx.sess.time("module_lints", || {
-                let has_cache = tcx.query_system.on_disk_cache.as_ref().map(|cache| cache.has_cache()).unwrap_or(false);
-
-                // Run per-module lints
-                if has_cache {
-                    tcx.hir().for_each_module(|module| tcx.ensure().lint_mod(module));
-                } else {
+    let has_cache =
+        tcx.query_system.on_disk_cache.as_ref().map(|cache| cache.has_cache()).unwrap_or(false);
+
+    if has_cache {
+        tcx.sess.time("crate_lints", || {
+            // Run whole crate non-incremental lints
+            late_lint_crate(tcx, builtin_lints());
+        });
+
+        tcx.sess.time("module_lints", || {
+            // Run per-module lints
+            tcx.hir().for_each_module(|module| tcx.ensure().lint_mod(module));
+        });
+    } else {
+        join(
+            || {
+                tcx.sess.time("crate_lints", || {
+                    // Run whole crate non-incremental lints
+                    late_lint_crate(tcx, builtin_lints());
+                });
+            },
+            || {
+                tcx.sess.time("module_lints", || {
                     tcx.hir().par_for_each_module(|module| tcx.ensure().lint_mod(module));
-                }
-            });
-        },
-    );
+                });
+            },
+        );
+    }
 }