push known targets back to session restart

Author: soulomoon

ghcide/session-loader/Development/IDE/Session.hs

@@ -613,10 +613,10 @@ loadSessionWithOptions recorder SessionLoadingOptions{..} dir = do
 
           void $ modifyVar' fileToFlags $ Map.insert hieYaml this_flags_map
           void $ modifyVar' filesMap $ flip HM.union (HM.fromList (map ((,hieYaml) . fst) $ concatMap toFlagsMap all_targets))
-          key1 <- extendKnownTargets all_targets
           -- The VFS doesn't change on cradle edits, re-use the old one.
           -- Invalidate all the existing GhcSession build nodes by restarting the Shake session
           restartShakeSession VFSUnmodified "new component" [] $ do
+            key1 <- extendKnownTargets all_targets
             key2 <- invalidateShakeCache
             return [key1, key2]