Unbreak trunk

Summary: Somehow forgot to submit this amendment to D53689274, and submitted a version of D53788472 which was based on the amended version of D53689274 (causing it to pass CI even though it would fail in trunk).

Differential Revision: D53837926

fbshipit-source-id: 8270433c9ace0968a6035af34782e74a77baaf24

td_util/src/supertd_events.rs

@@ -65,7 +65,6 @@ pub fn init(fb: fbinit::FacebookInit) -> ScubaClientGuard {
 /// # Examples
 ///
 /// ```
-/// # use serde_json::json;
 /// # let foos_run = 10;
 /// # let bars_launched = 2;
 /// td_util::scuba!(
@@ -85,10 +84,11 @@ macro_rules! scuba {
         $($crate::scuba! { @SET_FIELD(builder, $key, $value) })*
         builder.log();
     };
-    ( @SET_FIELD ( $builder:ident, data, $value:expr ) ) => {
+    ( @SET_FIELD ( $builder:ident, data, $value:expr ) ) => {{
+        use $crate::supertd_events::serde_json::json;
         // This unwrap should only fail for map keys with invalid UTF-8.
         $builder.add("data", $crate::supertd_events::serde_json::to_string(&$value).unwrap());
-    };
+    }};
     ( @SET_FIELD ( $builder:ident, $key:ident, $value:expr ) ) => {
         $builder.add(stringify!($key), $value);
     };