From 2cd52f86565a3f2a041a15ff8950a53e04364be5 Mon Sep 17 00:00:00 2001
From: Rafael Fourquet <fourquet.rafael@gmail.com>
Date: Thu, 4 Apr 2019 16:45:46 +0200
Subject: [PATCH] remove useless operation

---
 base/regex.jl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/base/regex.jl b/base/regex.jl
index a19f6110a357a..00234ade2fe1a 100644
--- a/base/regex.jl
+++ b/base/regex.jl
@@ -562,7 +562,7 @@ function *(r1::Union{Regex,AbstractString,AbstractChar}, rs::Union{Regex,Abstrac
                 r.compile_options & ~mask == compile_opts ||
                 throw(ArgumentError("cannot multiply regexes: incompatible options"))
         end
-        shared &= r.compile_options & mask
+        shared &= r.compile_options
     end
     unshared = mask & ~shared
     Regex(string(unwrap_string(r1, unshared), unwrap_string.(rs, Ref(unshared))...), compile_opts | shared, match_opts)