Bug#861091: python-ltfatpy: FTBFS: TestInstfreqplot AssertionError

[Aaron M. Ucko]

Source: python-ltfatpy
Version: 1.0.8-1
Severity: important
Justification: fails to build from source

The builds of python-ltfatpy for arm64, mips64el, and ppc64el all
failed with assertion errors in TestInstfreqplot, as detailed in

https://buildd.debian.org/status/fetch.php?pkg=python-ltfatpy&arch=arm64&ver=1.0.8-1&stamp=1492853219&raw=0
https://buildd.debian.org/status/fetch.php?pkg=python-ltfatpy&arch=mips64el&ver=1.0.8-1&stamp=1492855642&raw=0
https://buildd.debian.org/status/fetch.php?pkg=python-ltfatpy&arch=ppc64el&ver=1.0.8-1&stamp=1492853314&raw=0

On arm64, I see

>           assert_allclose(out, outputs[0], rtol=2e-15, err_msg=msg)
E           AssertionError:
E           Not equal to tolerance rtol=2e-15, atol=0
E           Wrong value in output of instfreqplot with inputs {'method': 'dgt', 'display': False, 'f': array([ 0.20742711,  0.60920036,  0.07727744,  0.49253249,  0.25168163,
E                   0.24451649,  0.15068151,  0.8799212 ,  0.4495264 ,  0.57848901,
E                   0.47870028,  0.87543732,  0.42257947])}
E           (mismatch 3.296703296703299%)

The mips64el and ppc64el builds encountered worse mismatches, roughly
4.4% and 7.7% respectively.

Could you please take a look?

Thanks!

-- 
Aaron M. Ucko, KB1CJC (amu at alum.mit.edu, ucko at debian.org)
http://www.mit.edu/~amu/ | http://stuff.mit.edu/cgi/finger/?amu@monk.mit.edu