[PATCH 5/7] imapclient: disable workaround for Mail::IMAPClient 3.43+

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

These fixes are in the recently-released Mail::IMAPClient 3.43:

https://metacpan.org/source/PLOBBES/Mail-IMAPClient-3.43/Changes
---
 lib/PublicInbox/IMAPClient.pm | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/lib/PublicInbox/IMAPClient.pm b/lib/PublicInbox/IMAPClient.pm
index 33deee9e..945b10fa 100644
--- a/lib/PublicInbox/IMAPClient.pm
+++ b/lib/PublicInbox/IMAPClient.pm
@@ -4,17 +4,18 @@
 #
 # The license for this file differs from the rest of public-inbox.
 #
-# Workaround some bugs in upstream Mail::IMAPClient when
+# Workaround some bugs in upstream Mail::IMAPClient <= 3.42 when
 # compression is enabled:
 # - reference cycle: https://rt.cpan.org/Ticket/Display.html?id=132654
 # - read starvation: https://rt.cpan.org/Ticket/Display.html?id=132720
 package PublicInbox::IMAPClient;
 use strict;
 use parent 'Mail::IMAPClient';
-use Errno qw(EAGAIN);
+unless (eval('use Mail::IMAPClient 3.43')) {
+require Errno;
 
 # RFC4978 COMPRESS
-sub compress {
+*compress = sub {
     my ($self) = @_;
 
     # BUG? strict check on capability commented out for now...
@@ -101,7 +102,7 @@ sub compress {
             # I/O readiness notifications (select, poll).  Refactoring
             # callers will be needed in the unlikely case somebody wants
             # to use edge-triggered notifications (EV_CLEAR, EPOLLET).
-            $! = EAGAIN;
+            $! = Errno::EAGAIN();
             return undef;
         }
 
@@ -114,6 +115,7 @@ sub compress {
     };
 
     return $self;
-}
+};
+} # $Mail::IMAPClient::VERSION < 3.43
 
 1;