diff --git a/addons/web/static/src/js/chrome.js b/addons/web/static/src/js/chrome.js
index ffec074a975..b605f4ad4e1 100644
--- a/addons/web/static/src/js/chrome.js
+++ b/addons/web/static/src/js/chrome.js
@@ -181,7 +181,7 @@ instance.web.Dialog = instance.web.Widget.extend({
 });
 
 instance.web.CrashManager = instance.web.CallbackEnabled.extend({
-    on_rpc_error: function(error) {
+    rpc_error: function(error) {
         if (error.data.fault_code) {
             var split = ("" + error.data.fault_code).split('\n')[0].split(' -- ');
             if (split.length > 1) {
@@ -190,12 +190,12 @@ instance.web.CrashManager = instance.web.CallbackEnabled.extend({
             }
         }
         if (error.code === 200 && error.type) {
-            this.on_managed_error(error);
+            this.show_warning(error);
         } else {
-            this.on_traceback(error);
+            this.show_error(error);
         }
     },
-    on_managed_error: function(error) {
+    show_warning: function(error) {
         instance.web.dialog($('<div>' + QWeb.render('CrashManager.warning', {error: error}) + '</div>'), {
             title: "OpenERP " + _.str.capitalize(error.type),
             buttons: [
@@ -203,7 +203,7 @@ instance.web.CrashManager = instance.web.CallbackEnabled.extend({
             ]
         });
     },
-    on_traceback: function(error) {
+    show_error: function(error) {
         var self = this;
         var buttons = {};
         buttons[_t("Ok")] = function() {
@@ -219,8 +219,8 @@ instance.web.CrashManager = instance.web.CallbackEnabled.extend({
         }).open();
         dialog.$el.html(QWeb.render('CrashManager.error', {session: instance.session, error: error}));
     },
-    on_javascript_exception: function(exception) {
-        this.on_traceback({
+    show_message: function(exception) {
+        this.show_error({
             type: _t("Client Error"),
             message: exception,
             data: {debug: ""}
@@ -236,7 +236,7 @@ instance.web.Loading = instance.web.Widget.extend({
         this.blocked_ui = false;
         this.session.on("request", this, this.request_call);
         this.session.on("response", this, this.response_call);
-        this.session.on("error", this, this.response_call);
+        this.session.on("response_failed", this, this.response_call);
     },
     destroy: function() {
         this.on_rpc_event(-this.count);
@@ -957,7 +957,7 @@ instance.web.Client = instance.web.Widget.extend({
     show_common: function() {
         var self = this;
         this.crashmanager =  new instance.web.CrashManager();
-        instance.session.on_rpc_error.add(this.crashmanager.on_rpc_error);
+        instance.session.on('error', this.crashmanager, this.crashmanager.rpc_error);
         self.notification = new instance.web.Notification(this);
         self.notification.appendTo(self.$el);
         self.loading = new instance.web.Loading(self);
@@ -1007,7 +1007,7 @@ instance.web.WebClient = instance.web.Client.extend({
         var self = this;
         this._super();
         window.onerror = function (message, file, line) {
-            self.crashmanager.on_traceback({
+            self.crashmanager.show_error({
                 type: _t("Client Error"),
                 message: message,
                 data: {debug: file + ':' + line}
diff --git a/addons/web/static/src/js/corelib.js b/addons/web/static/src/js/corelib.js
index 7a9af79b4fb..b5fbacc7927 100644
--- a/addons/web/static/src/js/corelib.js
+++ b/addons/web/static/src/js/corelib.js
@@ -980,7 +980,8 @@ instance.web.JsonRPC = instance.web.CallbackEnabled.extend({
     triggers: {
         'request': 'Request sent',
         'response': 'Response received',
-        'error': 'HTTP Error response or timeout received',
+        'response_failed': 'HTTP Error response or timeout received',
+        'error': 'The received response is an JSON-RPC error',
     },
     /**
      * @constructs instance.web.JsonRPC
@@ -1336,7 +1337,7 @@ instance.web.JsonRPC = instance.web.CallbackEnabled.extend({
                 }
             },
             function(jqXHR, textStatus, errorThrown) {
-                self.trigger('error');
+                self.trigger('response_failed', jqXHR);
                 var error = {
                     code: -32098,
                     message: "XmlHttpRequestError " + errorThrown,
@@ -1348,7 +1349,7 @@ instance.web.JsonRPC = instance.web.CallbackEnabled.extend({
         deferred.fail(function() {
             deferred.fail(function(error, event) {
                 if (!event.isDefaultPrevented()) {
-                    self.on_rpc_error(error, event);
+                    self.trigger('error', error, event);
                 }
             });
         });
@@ -1434,8 +1435,6 @@ instance.web.JsonRPC = instance.web.CallbackEnabled.extend({
             return deferred;
         }
     },
-    on_rpc_error: function(error) {
-    },
     get_url: function (file) {
         return this.prefix + file;
     },
diff --git a/addons/web/static/src/js/view_form.js b/addons/web/static/src/js/view_form.js
index 2b4569eea3f..afb5e258c0b 100644
--- a/addons/web/static/src/js/view_form.js
+++ b/addons/web/static/src/js/view_form.js
@@ -615,7 +615,7 @@ instance.web.FormView = instance.web.View.extend(instance.web.form.FieldManagerM
                 return self.on_processed_onchange(response, processed);
             } catch(e) {
                 console.error(e);
-                instance.webclient.crashmanager.on_javascript_exception(e);
+                instance.webclient.crashmanager.show_message(e);
                 return $.Deferred().reject();
             }
         });
@@ -650,7 +650,7 @@ instance.web.FormView = instance.web.View.extend(instance.web.form.FieldManagerM
         return $.Deferred().resolve();
         } catch(e) {
             console.error(e);
-            instance.webclient.crashmanager.on_javascript_exception(e);
+            instance.webclient.crashmanager.show_message(e);
             return $.Deferred().reject();
         }
     },
@@ -3316,11 +3316,7 @@ instance.web.form.FieldOne2Many = instance.web.form.AbstractField.extend({
         var views = [];
         _.each(modes, function(mode) {
             if (! _.include(["list", "tree", "graph", "kanban"], mode)) {
-                try {
-                    throw new Error(_.str.sprintf("View type '%s' is not supported in One2Many.", mode));
-                } catch(e) {
-                    instance.webclient.crashmanager.on_javascript_exception(e)
-                }
+                throw new Error(_.str.sprintf("View type '%s' is not supported in One2Many.", mode));
             }
             var view = {
                 view_id: false,