Source: python-fitsio Version: 1.1.7+dfsg-1 Severity: normal Tags: upstream patch Forwarded: https://github.com/esheldon/fitsio/pull/349
The python-fitsio testsuite fails when ran against cfitsio 4.1.0: | testCompressPreserveZeros (fitsio.test.TestReadWrite) | Test writing and reading gzip compressed image ... Warning: CFITSIO does not allow subtractive_dither_2 when using Hcompress algorithm. | Will use subtractive_dither_1 instead. | FAIL ... | ====================================================================== | FAIL: testCompressPreserveZeros (fitsio.test.TestReadWrite) | Test writing and reading gzip compressed image | ---------------------------------------------------------------------- | Traceback (most recent call last): | File "/usr/lib/python3/dist-packages/fitsio/test.py", line 1375, in testCompressPreserveZeros | assert rdata[zind[0], zind[1]] == 0.0 | AssertionError | | ---------------------------------------------------------------------- | Ran 60 tests in 1.072s A full test log is available: https://ci.debian.net/data/autopkgtest/testing/amd64/p/python-fitsio/21835539/log.gz The problem is that cfitsio 4.1.0 removed support for SUBTRACTIVE_DITHER_2 when using the HCOMPRESS algorithm, which is exactly (one of) the configuration tested in testCompressPreserveZeros. The fix is to stop testing the HCOMPRESS algorithm, a fix is available there: https://github.com/esheldon/fitsio/pull/349
