[New-bugs-announce] [issue27314] Cannot install 3.5.2 with 3.6.0a1 installed

[Steve Dower]

New submission from Steve Dower:

(Originally posted as a comment to issue26631 but confirmed separately.)

For 3.5.2 and 3.6.0a2, I updated the installer for the launcher so that it is always shared between Python versions (i.e. if you install 3.6 followed by 3.5, it won't touch the launcher because there's a "newer" one there).

However, because this didn't make it into 3.6.0a1, there is actually a version conflict that breaks installation.

I've marked this a deferred blocker for now and brought in the two RMs. I believe (and will test with the RCs) that this won't recur with the latest versions. It can also be easily worked around by choosing not to install the launcher.

We haven't seen this before because there have been no supported "downgrade" scenarios (i.e. installing 3.5.0 over 3.5.1 aborts at the start, well before this error would be seen).

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assignee: steve.dower
components: Windows
messages: 268500
nosy: larry, ned.deily, paul.moore, steve.dower, tim.golden, zach.ware
priority: deferred blocker
severity: normal
stage: test needed
status: open
title: Cannot install 3.5.2 with 3.6.0a1 installed
type: behavior
versions: Python 3.5, Python 3.6

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue27314>
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