It was harmless, besides wasting space and memory.
---
 lib/PublicInbox/SolverGit.pm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/PublicInbox/SolverGit.pm b/lib/PublicInbox/SolverGit.pm
index 612f495..53a6262 100644
--- a/lib/PublicInbox/SolverGit.pm
+++ b/lib/PublicInbox/SolverGit.pm
@@ -103,7 +103,7 @@ sub extract_diff ($$$$) {
 
                        push @$hdr_lines, $l;
                        $di->{hdr_lines} = $hdr_lines;
-                       print $tmp @$hdr_lines, $l or die "print(tmp): $!";
+                       print $tmp @$hdr_lines or die "print(tmp): $!";
 
                        # for debugging/diagnostics:
                        $di->{ibx} = $ibx;
-- 
EW

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