python 3.5.1 shows as installed after "Error Unable to compile python 3.5.1! " and activation does not work.

[Pat Callahan]

Python 2.7.10 is installed on Ubuntu via apt.
downloaded p
p 3.5.1

 install : Python-3.5.1
  create : /usr/local/p/versions/python/3.5.1
   fetch : https://www.python.org/ftp/python/3.5.1/Python-3.5.1.tgz

configure : 3.5.1
compile : 3.5.1

Error: Unable to compile Python 3.5.1!

but then:
p 3.5.1
activate : 3.5.1

Success: Now using Python 2.7.10!

2.7.10 shows greyed out,
3.5.1 shows light text indicating it is available.
python --version
Python 2.7.10

[Andrew Fiorillo]

I'm seeing the same issue running on Arch Linux. I also tried with p 3.6.4 and p 3.7.2. It will show up in the list of installed versions but activate does not work.