[PATCH] eml: fix undefined vars on <Perl 5.28

[Eric Wong <e@80x24.org>]

Ali Alnubani <alialnu@nvidia.com> wrote:
> Hi,
> 
> I see errors similar to the following in Debian 9 (stretch) with Perl 5.24:
> """
> Use of uninitialized value in subroutine entry at /usr/lib/x86_64-linux-gnu/perl5/5.24/Encode/MIME/Header.pm line 198.

Thanks for the bug report, it looks like the default was only
applied in top-level Encode::decode() wrapper and not the
per-object ->decode callbacks which we use with find_encoding().

(separate patch coming for the t/config.t fix)

-----------8<-----------
Subject: [PATCH] eml: fix undefined vars on <Perl 5.28

Encode::MIME::Header::_decode_octets did not correctly default
to Encode::FB_DEFAULT until Encode 2.93 (perl5.git commit
0c541dc5633a341cf44b818014b58e7f8be532e9).  Provide the default
again to work with older Perls.

Reported-by: Ali Alnubani <alialnu@nvidia.com>
Link: https://public-inbox.org/meta/DM6PR12MB49106F8E3BD697B63B943A22DADB0@DM6PR12MB4910.namprd12.prod.outlook.com/
---
 lib/PublicInbox/Eml.pm | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/PublicInbox/Eml.pm b/lib/PublicInbox/Eml.pm
index 571edc5c..4d3fffc0 100644
--- a/lib/PublicInbox/Eml.pm
+++ b/lib/PublicInbox/Eml.pm
@@ -378,7 +378,9 @@ sub header_str_set {
 	header_set($self, $name, @vals);
 }
 
-sub mhdr_decode ($) { eval { $MIME_Header->decode($_[0]) } // $_[0] }
+sub mhdr_decode ($) {
+	eval { $MIME_Header->decode($_[0], Encode::FB_DEFAULT) } // $_[0];
+}
 
 sub filename {
 	my $dis = header_raw($_[0], 'Content-Disposition');