'!' could wreak havoc if exposed to a shell like bash. It seems
like a rare character for use in file/directory/mailbox names.
---
lib/PublicInbox/LeiMark.pm | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/lib/PublicInbox/LeiMark.pm b/lib/PublicInbox/LeiMark.pm
index 7a2ccf77..6d236411 100644
--- a/lib/PublicInbox/LeiMark.pm
+++ b/lib/PublicInbox/LeiMark.pm
@@ -23,7 +23,7 @@ my %ERR = (
my ($label) = @_;
length($label) >= $L_MAX and
return "`$label' too long (must be <= $L_MAX)";
- $label =~ m{\A[a-z0-9_][a-z0-9_\-\./\@\!,]*[a-z0-9]\z} ?
+ $label =~ m{\A[a-z0-9_][a-z0-9_\-\./\@,]*[a-z0-9]\z} ?
undef : "`$label' is invalid";
},
kw => sub {
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