Peter Simons wrote:
> I'm getting the following test suite failure in Nix, probably because
> some Perl dependency was updated to a newer version recently:
->
-> # Failed test at t/img.t line 79.
-> # got: 'no image'
-> # expected: '12x12'
->
-> # Failed test at t/img.t line 80.
-> # got: 'no image'
-> # expected: '16x2'
-> # Looks like you failed 2 tests of 19.
-> t/img.t ........................
-> Dubious, test returned 2 (wstat 512, 0x200)
-> Failed 2/19 subtests
->
+
+ # Failed test at t/img.t line 79.
+ # got: 'no image'
+ # expected: '12x12'
+
+ # Failed test at t/img.t line 80.
+ # got: 'no image'
+ # expected: '16x2'
+ # Looks like you failed 2 tests of 19.
+ t/img.t ........................
+ Dubious, test returned 2 (wstat 512, 0x200)
+ Failed 2/19 subtests
+
> Do you have any idea how to fix this issue?
+
+>> As far as I can tell, this indicates that your ImageMagick doesn't
+>> support PDF (in Debian and its derivatives this requires `libmagickcore-extra`).
+>> Please run tests on a system with a fully-featured ImageMagick (in Debian we put
+>> `libmagickcore-extra` in the `Build-Depends-Indep` for this), or if you are testing
+>> at install time on arbitrary end-user systems, please tell me what this says on a
+>> system where the test fails:
+>>
+>> perl -MData::Dumper -MImage::Magick -e 'print Dumper([(new Image::Magick)->QueryFormat("pdf")])'
+>>
+>> If the result is `$VAR1 = [ undef ]`, then we can easily make the test skip that bit if PDFs don't work.
+>> --[[smcv]]
+
+>>> That configuration test doesn't actually work because of the way
+>>> ImageMagick processes PDFs via ghostscript, but loading a sample
+>>> PDF and probing its width does seem to work. [[done]] --[[smcv]]