tls: epollbit: account for miscellaneous OpenSSL errors

Apparently they happen (triggered by my -imapd instance), so
bail out by closing the underlying socket rather than stopping
the event loop and daemon process.

(cherry picked from commit c51c22c349529d9c377160abcc7961a6ca7b7d5c)

1 files changed, 3 insertions, 1 deletions

diff --git a/lib/PublicInbox/TLS.pm b/lib/PublicInbox/TLS.pm
index 0f838e25..86e6331d 100644
--- a/lib/PublicInbox/TLS.pm
+++ b/lib/PublicInbox/TLS.pm
@@ -6,6 +6,7 @@ package PublicInbox::TLS;
 use strict;
 use IO::Socket::SSL;
 use PublicInbox::Syscall qw(EPOLLIN EPOLLOUT);
+use Carp qw(carp);
 
 sub err () { $SSL_ERROR }
 
@@ -13,7 +14,8 @@ sub err () { $SSL_ERROR }
 sub epollbit () {
         return EPOLLIN if $SSL_ERROR == SSL_WANT_READ;
         return EPOLLOUT if $SSL_ERROR == SSL_WANT_WRITE;
-        die "unexpected SSL error: $SSL_ERROR";
+        carp "unexpected SSL error: $SSL_ERROR";
+        undef;
 }
 
 1;