What version of PDL do you have? Mine (2.025) was crashing with the segmentation fault, too, but after an upgrade to 2.084, I'm getting the following output: 
p:        PDL: Double D [4,4,4]
ndcoords: PDL: Double D [3,4,4,4]
range:    PDL: Double D [4,4,4,2,2,2]
[1 1 1 1]
q:        PDL: Double D [5,5,5,5]
ndcoords: PDL: Double D [4,5,5,5,5]
range:    PDL: Double D [5,5,5,5,2,2,1,5]
[1 1 1 1 1]

[download]
The 2, 2, 1, 5 is still there, but there are no errors.

map{substr$_->[0],$_->[1]||0,1}[\*||{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^*ARGV,3]

In reply to Re: PDL range on 4-d piddles by choroba
in thread PDL range on 4-d piddles by jo37

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