patch is extracted from debian:
https://deb.debian.org/debian/pool/main/libt/libtext-wrapi18n-perl/libtext-wrapi18n-perl_0.06-10.debian.tar.xz

Description: The infinite loop occurs in Text::WrapI18N when po4a tries to report an error in the PO files.
 I could reproduce the problem in WrapI18N::wrap() and I propose the
 attached patch to WrapI18N::wrap().  (A word should be placed on the
 next line if it fits on this line, but the leading header must be taken
 into account, thus $columns -> $columns - length $header)
Origin: vendor
Bug-Debian: https://bugs.debian.org/470250
Forwarded: unknown
Author: Nicolas François <nicolas.francois@centraliens.net>
Reviewed-by: gregor herrmann <gregoa@debian.org>
Last-Update: 2019-03-21

--- a/WrapI18N.pm	2003-06-25 11:14:25.000000000 +0200
+++ b/WrapI18N.pm	2008-03-13 02:04:02.628000837 +0100
@@ -88,7 +88,7 @@ sub wrap {
 			$len = 0;
 			$text = $top2 . $text;
 			$word = ''; $wlen = 0;
-		} elsif ($wlen + $w <= $columns) {
+		} elsif ($wlen + $w <= $columns - length ($top2)) {
 			# the current word is sent to next line
 			$out .= $separator;
 			$len = 0;