diff --git a/frappe/core/doctype/user/user.py b/frappe/core/doctype/user/user.py
index d08755f9a8..1ad977547c 100644
--- a/frappe/core/doctype/user/user.py
+++ b/frappe/core/doctype/user/user.py
@@ -253,8 +253,8 @@ class User(Document):
 				self.email_new_password(new_password)
 
 		except frappe.OutgoingEmailError:
-			print(frappe.get_traceback())
-			pass # email server not set, don't send email
+			# email server not set, don't send email
+			frappe.log_error(frappe.get_traceback())
 
 	@Document.hook
 	def validate_reset_password(self):
diff --git a/frappe/public/js/frappe/list/list_settings.js b/frappe/public/js/frappe/list/list_settings.js
index 782a077a78..186a4370bc 100644
--- a/frappe/public/js/frappe/list/list_settings.js
+++ b/frappe/public/js/frappe/list/list_settings.js
@@ -375,7 +375,7 @@ export default class ListSettings {
 		let me = this;
 
 		if (me.removed_fields) {
-			me.removed_fields.concat(fields);
+			me.removed_fields = me.removed_fields.concat(fields);
 		} else {
 			me.removed_fields = fields;
 		}
diff --git a/frappe/public/js/frappe/utils/utils.js b/frappe/public/js/frappe/utils/utils.js
index a944af523d..0514576380 100644
--- a/frappe/public/js/frappe/utils/utils.js
+++ b/frappe/public/js/frappe/utils/utils.js
@@ -231,7 +231,7 @@ Object.assign(frappe.utils, {
 			if (tt && (tt.substr(0, 1)===">" || tt.substr(0, 4)===">")) {
 				part.push(t);
 			} else {
-				out.concat(part);
+				out = out.concat(part);
 				out.push(t);
 				part = [];
 			}
diff --git a/frappe/public/js/frappe/views/reports/report_view.js b/frappe/public/js/frappe/views/reports/report_view.js
index f80d59350f..2747a2723d 100644
--- a/frappe/public/js/frappe/views/reports/report_view.js
+++ b/frappe/public/js/frappe/views/reports/report_view.js
@@ -1026,7 +1026,7 @@ frappe.views.ReportView = class ReportView extends frappe.views.ListView {
 		}
 		if (!docfield || docfield.report_hide) return;
 
-		let title = __(docfield ? docfield.label : toTitle(fieldname));
+		let title = __(docfield.label);
 		if (doctype !== this.doctype) {
 			title += ` (${__(doctype)})`;
 		}
diff --git a/frappe/translate.py b/frappe/translate.py
index 292adc71c7..0367d33d3b 100644
--- a/frappe/translate.py
+++ b/frappe/translate.py
@@ -650,8 +650,6 @@ def extract_messages_from_code(code):
 		if isinstance(e, InvalidIncludePath):
 			frappe.clear_last_message()
 
-		pass
-
 	messages = []
 	pattern = r"_\(([\"']{,3})(?P<message>((?!\1).)*)\1(\s*,\s*context\s*=\s*([\"'])(?P<py_context>((?!\5).)*)\5)*(\s*,\s*(.)*?\s*(,\s*([\"'])(?P<js_context>((?!\11).)*)\11)*)*\)"
 
diff --git a/frappe/utils/backups.py b/frappe/utils/backups.py
index 3a0c337042..5197b20bd3 100644
--- a/frappe/utils/backups.py
+++ b/frappe/utils/backups.py
@@ -15,7 +15,7 @@ import click
 
 # imports - module imports
 import frappe
-from frappe import _, conf
+from frappe import conf
 from frappe.utils import get_file_size, get_url, now, now_datetime, cint
 from frappe.utils.password import get_encryption_key
 
@@ -505,7 +505,7 @@ download only after 24 hours.""" % {
 			datetime_str.strftime("%d/%m/%Y %H:%M:%S") + """ - Backup ready to be downloaded"""
 		)
 
-		frappe.sendmail(recipients=recipient_list, msg=msg, subject=subject)
+		frappe.sendmail(recipients=recipient_list, message=msg, subject=subject)
 		return recipient_list
 
 
@@ -779,7 +779,7 @@ if __name__ == "__main__":
 			db_type=db_type,
 			db_port=db_port,
 		)
-		odb.send_email("abc.sql.gz")
+		odb.send_email()
 
 	if cmd == "delete_temp_backups":
 		delete_temp_backups()
diff --git a/frappe/utils/nestedset.py b/frappe/utils/nestedset.py
index 98ad337043..2517761c45 100644
--- a/frappe/utils/nestedset.py
+++ b/frappe/utils/nestedset.py
@@ -227,7 +227,6 @@ class NestedSet(Document):
 			update_nsm(self)
 		except frappe.DoesNotExistError:
 			if self.flags.on_rollback:
-				pass
 				frappe.message_log.pop()
 			else:
 				raise