lei_to_mail: show --output on augment progress failure

Just in case it fails when there's many parallel invocations.

diff --git a/lib/PublicInbox/LeiToMail.pm b/lib/PublicInbox/LeiToMail.pm
index d42759cf71d4d372612fdbc4c79efcf270533e1d..5a220ba397354af51f23bdc9685c99ecf4181f51 100644 (file)
--- a/lib/PublicInbox/LeiToMail.pm
+++ b/lib/PublicInbox/LeiToMail.pm
@@ -796,7 +796,7 @@ sub augment_inprogress {
                                "scanning old contents of $dst for dedupe" :
                                "removing old contents of $dst")." ...\n";
        };
-       warn "E: $@" if $@;
+       warn "E: $@ ($dst)" if $@;
 }
 
 # called in top-level lei-daemon when LeiAuth is done