pvar must be collected if there is no variant subset

Signed-off-by: Kyle Scott <[email protected]>

snputils/snp/io/read/pgen.py

@@ -118,6 +118,7 @@ def read(
             if variant_idxs is None:
                 num_variants = file_num_variants
                 variant_idxs = np.arange(num_variants, dtype=np.uint32)
+                pvar = pvar.collect()
             else:
                 num_variants = np.size(variant_idxs)
                 variant_idxs = np.array(variant_idxs, dtype=np.uint32)