Hi all,

At https://trac.sagemath.org/ticket/28664 I’m/we’re confronted with a bug where 
I’m not sure how to make progress.

Essentially, if you build Sage from source, all is well. But if you use the 
binaries provided then lattice reduction reverts to something really really 
slow by being unable to load the strategies that speed it up:

First problem:

sage:  from fpylll import *
sage: BKZ.DEFAULT_STRATEGY
'/home/malb/software/SageMath/local/share/fplll/strategieparse error - 
unpreprocessing_blpruning_parameteError: gptr == nullpoints/default.json'

This should be a filename.

But even loading from a correct path fails:

sage: from fpylll import *
load_strategies_json("/home/malb/projects/lattices/fplll/strategies/default.json")[60]
Strategy< 60, (), 1.00-1.00>

The above should read `Strategy< 60, (40), 0.29-0.50>`

Any ideas?

Cheers,
Martin

-- 

_pgp: https://keybase.io/martinralbrecht
_www: https://malb.io

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