Anonymous RPC GET_FILE_SIZE does not work correctly unless at least one authenticated RPC has been called first. Also RPC failures (throw error) are silent in the logs

rpc.js

@@ -1057,11 +1057,9 @@ RPC.create = function (config /*:typeof(ConfigType)*/, cb /*:(?Error, ?Function)
         }
     };
 
-    var rpc = function (
-        ctx /*:{ store: Object }*/,
-        data /*:Array<Array<any>>*/,
-        respond /*:(?string, ?Array<any>)=>void*/)
-    {
+    var rpc0 = function (ctx, data, respond) {
+        if (!Env.msgStore) { Env.msgStore = ctx.store; }
+
         if (!Array.isArray(data)) {
             return void respond('INVALID_ARG_FORMAT');
         }
@@ -1140,8 +1138,6 @@ RPC.create = function (config /*:typeof(ConfigType)*/, cb /*:(?Error, ?Function)
             Respond('E_ACCESS_DENIED');
         };
 
-        if (!Env.msgStore) { Env.msgStore = ctx.store; }
-
         var handleMessage = function (privileged) {
             if (config.logRPC) { console.log(msg[0]); }
         switch (msg[0]) {
@@ -1272,6 +1268,19 @@ RPC.create = function (config /*:typeof(ConfigType)*/, cb /*:(?Error, ?Function)
         handleMessage(session.privilege);
     };
 
+    var rpc = function (
+        ctx /*:{ store: Object }*/,
+        data /*:Array<Array<any>>*/,
+        respond /*:(?string, ?Array<any>)=>void*/)
+    {
+        try {
+            return rpc0(ctx, data, respond);
+        } catch (e) {
+            console.log("Error from RPC with data " + JSON.stringify(data));
+            console.log(e.stack);
+        }
+    };
+
     var updateLimitDaily = function () {
         updateLimits(config, undefined, function (e) {
             if (e) {