[fix] #4465

frappe/__init__.py

@@ -311,6 +311,10 @@ def msgprint(msg, title=None, raise_exception=0, as_table=False, indicator=None,
 def clear_messages():
 	local.message_log = []
 
+def clear_last_message():
+	if len(local.message_log) > 0:
+		local.message_log = local.message_log[:-1]
+
 def throw(msg, exc=ValidationError, title=None):
 	"""Throw execption and show message (`msgprint`).
 

frappe/model/document.py

@@ -361,6 +361,7 @@ class Document(BaseDocument):
 				self._doc_before_save = frappe.get_doc(self.doctype, self.name)
 			except frappe.DoesNotExistError:
 				self._doc_before_save = None
+				frappe.clear_last_message()
 		return self._doc_before_save
 
 	def set_new_name(self, force=False):

frappe/public/js/frappe/form/controls/password.js

@@ -22,7 +22,7 @@ frappe.ui.form.ControlPassword = frappe.ui.form.ControlData.extend({
 	get_password_strength: function(value) {
 		var me = this;
 		frappe.call({
-			type: 'GET',
+			type: 'POST',
 			method: 'frappe.core.doctype.user.user.test_password_strength',
 			args: {
 				new_password: value || ''