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-rw-r--r--lib/PublicInbox/Git.pm1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/PublicInbox/Git.pm b/lib/PublicInbox/Git.pm
index 057135ef..8426cc7d 100644
--- a/lib/PublicInbox/Git.pm
+++ b/lib/PublicInbox/Git.pm
@@ -147,6 +147,7 @@ sub _cat_async_step ($$) {
         my ($oid_hex, $type, $size) = ($1, $2, $3 + 0);
         my $bref = read_cat_in_full($self, $size);
         eval { $cb->($bref, $oid_hex, $type, $size, $arg) };
+        warn "E: $oid_hex $@\n" if $@;
 }
 
 sub cat_async_wait ($) {