messy code is displayed with prompt occasionally

[nanaal]

jonathanslenders,

When I run prompt with below format, messy code will be displayed occasionally as below. I am not sure whether it is a bug of python-prompt-toolkit. Can you help to have a look?
Thanks a lot in advance.

Nana

^[[35;1R file size limit(MB): 50
^[[70;1R has release extension: N
^[[70;1R node name: CGF01

`class EmailValidator(Validator):
self.func = None
def validate(self, document):
if len(document.text) > 0 and document.text[-1] == "!":
return
if self.func == None:
return
tmp_val = self.func(document.text)
if len(tmp_val):
raise ValidationError(message=tmp_val,
cursor_position=len(document.text))

for key, val in self.__setMap.items():
validator = EmailValidator();
validator.func = val
text = prompt(' %s: ' %key, default='%s' %str(self.__getMapkey), validator=validator)
if len(text) > 0 and text[-1] == "!":
return True
`

[jonathanslenders]

Hi @nanaal,

This is a cursor-position-response that should have been processed, but was printed instead.
Can you please tell me which operating system and terminal application you are using?

Thanks,
Jonathan

[nanaal]

Hi @jonathanslenders ,

Below are the info of operating system and terminal application.
Please help to have a check.
Thanks a lot.

Nana

[root@yywcdr-1 ~]# cat /etc/redhat-release
Red Hat Enterprise Linux Server release 7.2 (Maipo)
[root@yywcdr-1 ~]# echo $TERM
xterm

[atherra]

I can also reproduce this fairly easily by triggering fast prompt redraws by mashing Enter on the prompt or when printing a large set of tabulated data.

root@fsrv02:/root>

root@fsrv02:/root>

root@fsrv02:/root>

^[[53;1R
root@fsrv02:/root>

Disabling cooked mode (#487) doesn't seem to change anything for me.

Testing https://github.com/jonathanslenders/python-prompt-toolkit/pull/339/files, I no longer see CPRs. I do, however, see seemingly random newlines between prompts (stdout proxying is on):

root@fsrv02:/root>
root@fsrv02:/root>
root@fsrv02:/root>

root@fsrv02:/root>

root@fsrv02:/root>


root@fsrv02:/root>

root@fsrv02:/root>

[asmeurer]

Same issue as #456. I'll need to check if that PR fixes it.

[asmeurer]

I tested the branch (it's old, so you probably have to merge with master) and it doesn't fix the problem for me. Also sometimes it prints the first prompt twice.

[atherra]

Re. https://github.com/jonathanslenders/python-prompt-toolkit/pull/339/files I tested it by cherry-picking to master.

[jonathanslenders]

Hi everyone, could you test whether this issue still happens on the 2.0 branch?
(Possibly you'll have to make a few small changes for using 2.0.) If that's still the case, it would be much easier to fix it there. Thanks!

[asmeurer]

I modified my patch in #456 to work in 2.0, and it reproduced there.