Fix handling zero matches.

Don't try to compute log(0).

1 files changed, 4 insertions, 2 deletions

diff --git a/reselect b/reselect
index c1cdb7c..e42fd9f 100644
--- a/reselect
+++ b/reselect
@@ -26,9 +26,11 @@ sub hint_iterator {
     my ($len)    = @_;
 
     # generate fixed-length codes of sufficient length for all matches
-    my $code_len = POSIX::ceil(log($len) / log(@hintchars));
-    if ($code_len == 0) {
+    my $code_len;
+    if ($len == 0) {
         $code_len = 1;
+    } else {
+        $code_len = POSIX::ceil(log($len) / log(@hintchars));
     }
 
     my $state = 0;