Follow-up Comment #4, bug #58206 (project groff):
Ok so a work around I used was to use tr's -d flag to remove the NULL sections
from the output from pdfinfo. As far as I know this should be available to all
systems. Another option is to use cat -v but I don't think that is POSIX
complaint.
Here is the diff
diff --git a/tmac/pdfpic.tmac b/tmac/pdfpic.tmac
index 0400c1cf..3dae30be 100644
--- a/tmac/pdfpic.tmac
+++ b/tmac/pdfpic.tmac
@@ -84,6 +84,7 @@
.\" get image dimensions
. ec @
. sy pdfinfo @$1 | \
+tr -d '\000' | \
grep "Page *size" | \
sed -e 's/Page *size: *\\([[:digit:].]*\\) *x *\\([[:digit:].]*\\).*$/\
.nr pdf-wid (p;\\1)\\n\
(file #48890)
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