From 8e991900c97a3e2d9eb4ef1f3d61441c669f4da5 Mon Sep 17 00:00:00 2001
From: Jeremy Evans <code@jeremyevans.net>
Date: Fri, 21 Sep 2012 15:20:43 -0700
Subject: [PATCH] Fix minor thread-safety issue on non-GVL ruby in
 Database#schema

---
 lib/sequel/database/query.rb | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/sequel/database/query.rb b/lib/sequel/database/query.rb
index fefc6520e4..4c4bf79d00 100644
--- a/lib/sequel/database/query.rb
+++ b/lib/sequel/database/query.rb
@@ -195,7 +195,9 @@ def schema(table, opts={})
       opts[:schema] = sch if sch && !opts.include?(:schema)
 
       Sequel.synchronize{@schemas.delete(quoted_name)} if opts[:reload]
-      return Sequel.synchronize{@schemas[quoted_name]} if @schemas[quoted_name]
+      if v = Sequel.synchronize{@schemas[quoted_name]}
+        return v
+      end
 
       cols = schema_parse_table(table_name, opts)
       raise(Error, 'schema parsing returned no columns, table probably doesn\'t exist') if cols.nil? || cols.empty?