From 32b5c017ebc6ea6ad94a7a7e67382f8dbf1ff23e Mon Sep 17 00:00:00 2001
From: Milan Bouchet-Valat <nalimilan@club.fr>
Date: Fri, 17 Jun 2016 21:04:27 +0200
Subject: [PATCH] Fix bitshift operators on Bool

Previously triggered a stack overflow due to recursive definition.
---
 base/bool.jl | 4 ++++
 test/int.jl  | 5 +++++
 2 files changed, 9 insertions(+)

diff --git a/base/bool.jl b/base/bool.jl
index cef413455db46..c867ede02515d 100644
--- a/base/bool.jl
+++ b/base/bool.jl
@@ -20,6 +20,10 @@ typemax(::Type{Bool}) = true
 (|)(x::Bool, y::Bool) = box(Bool,or_int(unbox(Bool,x),unbox(Bool,y)))
 ($)(x::Bool, y::Bool) = (x!=y)
 
+>>(x::Bool, c::Unsigned) = Int(x) >> c
+<<(x::Bool, c::Unsigned) = Int(x) << c
+>>>(x::Bool, c::Unsigned) = Int(x) >>> c
+
 signbit(x::Bool) = false
 sign(x::Bool) = x
 abs(x::Bool) = x
diff --git a/test/int.jl b/test/int.jl
index 40b79c726d2ac..cc724bac92173 100644
--- a/test/int.jl
+++ b/test/int.jl
@@ -190,3 +190,8 @@ end
 
 # issue #16700
 @test_throws MethodError 1.0 >> 8
+
+# PR #16988
+@test true << 2 === 1 << 2
+@test true >> 2 === 1 >> 2
+@test true >>> 2 === 1 >>> 2