treewide: fix %SIG localization, harder

This fixes the occasional t/lei-sigpipe.t infinite loop
under "make check-run".

Link: http://nntp.perl.org/group/perl.perl5.porters/258784
  <CAHhgV8hPbcmkzWizp6Vijw921M5BOXixj4+zTh3nRS9vRBYk8w@mail.gmail.com>
Followup-to: b552bb9150775fe4 ("daemon+watch: fix localization of %SIG for non-signalfd users")

1 files changed, 1 insertions, 0 deletions

diff --git a/t/run.perl b/t/run.perl
index e5ee0ade..0fe6d08b 100755
--- a/t/run.perl
+++ b/t/run.perl
@@ -168,6 +168,7 @@ my $start_worker = sub {
         my $pid = fork // DIE "fork: $!";
         if ($pid == 0) {
                 close $wr if $wr;
+                $SIG{USR1} = undef; # undo parent $SIG{USR1}
                 $worker = $$;
                 while (1) {
                         my $r = sysread($rd, my $buf, UINT_SIZE);