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-rw-r--r--lib/PublicInbox/Spawn.pm3
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/PublicInbox/Spawn.pm b/lib/PublicInbox/Spawn.pm
index b02d5368..727caf1c 100644
--- a/lib/PublicInbox/Spawn.pm
+++ b/lib/PublicInbox/Spawn.pm
@@ -210,7 +210,8 @@ sub spawn ($;$$) {
         }
         my $cd = $opts->{'-C'} // ''; # undef => NULL mapping doesn't work?
         my $pid = pi_fork_exec($redir, $f, $cmd, \@env, $rlim, $cd);
-        $pid < 0 ? undef : $pid;
+        die "fork_exec failed: $!\n" unless defined $pid;
+        $pid;
 }
 
 sub popen_rd {