On 2016-10-11 09:38, Eric Gourgoulhon wrote:
[sagelib-7.4.rc0] sage/rings/finite_rings/integer_mod.pyx:1688:10: '_floordiv_'
already defined
It seems that this machine is running the Sage patchbot within a Sage
shell, which is not supported. Because of this, the environment variable
PIP_INSTALL is set to a wrong value, so the fix from #21441 is not applied.
In logs/install.log there is
*** ALL ENVIRONMENT VARIABLES BEFORE BUILD: ***
...
SAGE_ENV_SOURCED=4
...
This shouldn't be there. Whether you are using the patchbot or not, you
should not build Sage within a Sage shell.
Concrete suggestions:
1. Stop this patchbot
2. Rebuild Python (./sage -f python2)
3. Run the patchbot properly, see
https://wiki.sagemath.org/buildbot/details
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