fixup! Read and write users in different tasks

Author: sandhose

crates/syn2mas/src/migration.rs

@@ -226,7 +226,7 @@ async fn migrate_users(
     synapse: &mut SynapseReader<'_>,
     mut mas: MasWriter,
     count_hint: usize,
-    state: MigrationState,
+    mut state: MigrationState,
     rng: &mut impl RngCore,
 ) -> Result<(MasWriter, MigrationState), Error> {
     let start = Instant::now();
@@ -254,6 +254,14 @@ async fn migrate_users(
                     flags |= UserFlags::IS_GUEST;
                 }
 
+                state.users.insert(
+                    CompactString::new(&mas_user.username),
+                    UserInfo {
+                        mas_user_id: mas_user.user_id,
+                        flags,
+                    },
+                );
+
                 user_buffer
                     .write(&mut mas, mas_user)
                     .await