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authorEric Wong <e@80x24.org>2022-02-17 21:02:33 +0000
committerEric Wong <e@80x24.org>2022-02-18 00:16:29 +0000
commit47ab29704c99b8eab15aec885ce704b25f960023 (patch)
treebff3509d8a9aeca5f609a36121a3c71aa0d2eee0
parenteefde9dd2265171e3ed267ff767df5db6d4644e6 (diff)
downloadpublic-inbox-47ab29704c99b8eab15aec885ce704b25f960023.tar.gz
This may help diagnose a difficult-to-reproduce test failure on NixOS.

Link: https://public-inbox/meta/20211209013743.okzgim7bbrpahks7@sourcephile.fr/
-rw-r--r--t/lei-sigpipe.t8
1 files changed, 7 insertions, 1 deletions
diff --git a/t/lei-sigpipe.t b/t/lei-sigpipe.t
index d9738b07..6b2772a6 100644
--- a/t/lei-sigpipe.t
+++ b/t/lei-sigpipe.t
@@ -27,11 +27,17 @@ EOM
                 }
 
                 lei_ok(qw(import), $f) if $imported++ == 0;
-                open my $errfh, '+>', "$ENV{HOME}/stderr.log" or xbail $!;
+                open my $errfh, '+>>', "$ENV{HOME}/stderr.log" or xbail $!;
                 my $opt = { run_mode => 0, 2 => $errfh, 1 => $w };
                 my $cmd = [qw(lei q -q -t), @$out, 'z:1..'];
                 my $tp = start_script($cmd, undef, $opt);
                 close $w;
+                vec(my $rvec = '', fileno($r), 1) = 1;
+                if (!select($rvec, undef, undef, 30)) {
+                        seek($errfh, 0, 0) or xbail $!;
+                        my $s = do { local $/; <$errfh> };
+                        xbail "lei q had no output after 30s, stderr=$s";
+                }
                 is(sysread($r, my $buf, 1), 1, 'read one byte');
                 close $r; # trigger SIGPIPE
                 $tp->join;