lei: fix some warnings in tests

And then test the contents of $lei_err to ensure it doesn't
happen again.

We'll also make MboxLock emit nicer warnings without the line
number, since the line number is irrelevant to the user fixing
an mbox lock contention problem.

Finally, we'll also allow showing loud warnings via
TEST_LEI_ERR_LOUD=1

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/PublicInbox/LeiP2q.pm b/lib/PublicInbox/LeiP2q.pm
index e7ddc852..c5718603 100644
--- a/lib/PublicInbox/LeiP2q.pm
+++ b/lib/PublicInbox/LeiP2q.pm
@@ -144,7 +144,7 @@ sub do_p2q { # via wq_do
                         my $end = ($pfx =~ s/([0-9\*]+)\z//) ? $1 : '';
                         my $x = delete($lei->{qterms}->{$pfx}) or next;
                         my $star = $end =~ tr/*//d ? '*' : '';
-                        my $min_len = ($end // 0) + 0;
+                        my $min_len = ($end || 0) + 0;
 
                         # no wildcards for bool_pfx_external
                         $star = '' if $pfx =~ /\A(dfpre|dfpost|mid)\z/;