[F] Fix log sync

tests/unit/logging.rs

@@ -11,3 +11,28 @@ fn status_text_truncates_to_fixed_width() {
     assert_eq!(truncate_status("short", 8), "short");
     assert_eq!(truncate_status("very-long-status", 8), "very-lo~");
 }
+
+#[test]
+fn repo_log_context_is_inherited_by_parallel_workers() {
+    let _guard = start_repo_log("repo-a".to_string(), 0, 8);
+
+    crate::logln!("outer line");
+    crate::parallel::map(vec!["worker line"], 1, |line| {
+        crate::logln!("{line}");
+        Ok::<_, anyhow::Error>(())
+    })
+    .unwrap();
+
+    let lines = {
+        let context = current_repo_log_context().unwrap();
+        context
+            .inner
+            .lines
+            .lock()
+            .unwrap_or_else(|poisoned| poisoned.into_inner())
+            .clone()
+    };
+    finish_repo_log();
+
+    assert_eq!(lines, vec!["outer line", "worker line"]);
+}