error in simulating sample.py on gem5: "AttributeError: Not allowed to set pio on 'SimObjectVector' " - gem5

I have been trying to simulate the 'simple.py' code on gem5 from the gem5 tutorial. Link of the tutorial is: http://pages.cs.wisc.edu/~david/courses/cs752/Spring2015/gem5-tutorial/part1/simple_config.html#simple-config-fig
I am getting an error saying that "AttributeError: Not allowed to set pio on 'SimObjectVector'".
Does anyone know how to resolve it?

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src/tcmalloc.cc:332] Attempt to free invalid pointer Colab

I was trying to run the following code at Colab
https://colab.research.google.com/drive/15mioeqRXUz-I7jv2Qk3-CcyqUzxU099u#scrollTo=FUs-hE1Lr7Fh
but gives me the following error
enter image description here
how to solve it ?

Vega-Embed giving build error Cannot find name 'Extract' and 'Exclude'

I created angular 6 application(Using node). In this application I used vega-embed. It is giving me compilation error.
import embed from 'vega-embed';
I also changed code in util.d.ts import stableStringify = require('json-stable-stringify') but giving following error
ERROR in node_modules/vega-lite/build/src/util.d.ts(58,41): error TS2304: Cannot find name 'Extract'.
node_modules/vega-lite/build/src/util.d.ts(73,58): error TS2304: Cannot find name 'Exclude'.
Please suggest.

Value of type 'Microsoft.TeamFoundation.VersionControl.Client.VersionControlServer' cannot be converted to 'System.Type

I'm working on a custom TFS Build workflow based on the code found in two blogs:
http://www.theringworx.com/blog/?p=494
https://lajak.wordpress.com/2011/08/30/tfs2010-retrieve-associated-workitems-to-changesets-tfs-api/
When I implement the VB.Net code within my XAML workflow, I'm currently getting the following errors on build runtime:
The build process failed validation. Details:
Validation Error: The private implementation of activity '1:
DynamicActivity' has the following validation error: Compiler
error(s) encountered processing expression "TFSService".
Value of type
'Microsoft.TeamFoundation.VersionControl.Client.VersionControlServer'
cannot be converted to 'System.Type'.
Validation Error: The private implementation of activity '1:
DynamicActivity' has the following validation error: Compiler
error(s) encountered processing expression "TFS.GetService(Of
VersionControlServer)();".
End of expression expected.
I've traced the error down to this section of code (Simplified from XAML):
TFS=Microsoft.TeamFoundation.Client.TfsTeamProjectCollectionFactory.GetTeamProjectCollectionFactory(New Uri("MyTeamsTFSServer"))
TFSService = TFS.GetService(Of VersionControlServer)()
I've tried changing the type of TFSService from both Microsoft.TeamFoundation.VersionControl.Client.VersionControlServer and System.Type without success.
From what I can tell the error is occurring in the "Of VersionControlServer".
Has anyone ever encountered this? And if so how did you resolve it?
Turns out the issue was the URL I was using, I made a typo when I was entering it in. Yay for descriptive error messages...
I found this while I was checking my authentication using the two methods:
TFS.HasAuthenticated
TFS.Authenticate();
My code blew out when I was running the Authenticate() method.

Error 22 when scanning for available WiFi-Networks using CoreWLAN

I use the following code to scan for all available WiFi-Networks:
[[CWInterface interface] scanForNetworksWithSSID:nil error:&err];
Usually I get a NSSet of Networks but sometimes I get the following error:
The operation couldn’t be completed. (com.apple.coreWLAN.error error
22.)
Error Domain=com.apple.coreWLAN.error Code=22
I haven't find anything about that error code 22. Is there a documentation or a solution for this?
Because I had another problem with CoreWlan(http://stackoverflow.com/questions/9943833/cwinterface-returning-no-data) i replaced it with Apple80211.framework.
This also is a workaround for this one...

Django raw query cursor error

The following code gives me an error
from django.db import connection
cursor = connection.cursor()
Error message:
Undefined variable from import: cursor
I have Django 1.2.5 installed. How can a resolve this issue?
Thanks
This was just a PyDev information message as Daniel pointed out. I am able to run the script without modifying anything.