diff --git a/.github/driver.sh b/.github/driver.sh
index 561954e7c3a..6ff189fc859 100644
--- a/.github/driver.sh
+++ b/.github/driver.sh
@@ -7,9 +7,9 @@ sysroot=$(./target/debug/clippy-driver --print sysroot)
 test "$sysroot" = "$(rustc --print sysroot)"
 
 if [[ ${OS} == "Windows" ]]; then
-  desired_sysroot=C:/tmp
+	desired_sysroot=C:/tmp
 else
-  desired_sysroot=/tmp
+	desired_sysroot=/tmp
 fi
 sysroot=$(./target/debug/clippy-driver --sysroot $desired_sysroot --print sysroot)
 test "$sysroot" = $desired_sysroot
@@ -22,20 +22,18 @@ unset CARGO_MANIFEST_DIR
 
 # Run a lint and make sure it produces the expected output. It's also expected to exit with code 1
 # FIXME: How to match the clippy invocation in compile-test.rs?
-./target/debug/clippy-driver -Dwarnings -Aunused -Zui-testing --emit metadata --crate-type bin tests/ui/double_neg.rs 2> double_neg.stderr && exit 1
-sed -e "s,tests/ui,\$DIR," -e "/= help/d" double_neg.stderr > normalized.stderr
+./target/debug/clippy-driver -Dwarnings -Aunused -Zui-testing --emit metadata --crate-type bin tests/ui/double_neg.rs 2>double_neg.stderr && exit 1
+sed -e "s,tests/ui,\$DIR," -e "/= help/d" double_neg.stderr >normalized.stderr
 diff -u normalized.stderr tests/ui/double_neg.stderr
 
-
 # make sure "clippy-driver --rustc --arg" and "rustc --arg" behave the same
-SYSROOT=`rustc --print sysroot`
+SYSROOT=$(rustc --print sysroot)
 diff -u <(LD_LIBRARY_PATH=${SYSROOT}/lib ./target/debug/clippy-driver --rustc --version --verbose) <(rustc --version --verbose)
 
-
-echo "fn main() {}" > target/driver_test.rs
+echo "fn main() {}" >target/driver_test.rs
 # we can't run 2 rustcs on the same file at the same time
-CLIPPY=`LD_LIBRARY_PATH=${SYSROOT}/lib ./target/debug/clippy-driver ./target/driver_test.rs --rustc`
-RUSTC=`rustc ./target/driver_test.rs`
+CLIPPY=$(LD_LIBRARY_PATH=${SYSROOT}/lib ./target/debug/clippy-driver ./target/driver_test.rs --rustc)
+RUSTC=$(rustc ./target/driver_test.rs)
 diff -u <($CLIPPY) <($RUSTC)
 
 # TODO: CLIPPY_CONF_DIR / CARGO_MANIFEST_DIR
diff --git a/clippy_lints/src/lib.rs b/clippy_lints/src/lib.rs
index 97358e06c63..5c3af014ee1 100644
--- a/clippy_lints/src/lib.rs
+++ b/clippy_lints/src/lib.rs
@@ -11,6 +11,7 @@
 #![feature(or_patterns)]
 #![feature(rustc_private)]
 #![feature(stmt_expr_attributes)]
+#![feature(control_flow_enum)]
 #![recursion_limit = "512"]
 #![cfg_attr(feature = "deny-warnings", deny(warnings))]
 #![allow(clippy::missing_docs_in_private_items, clippy::must_use_candidate)]
diff --git a/clippy_lints/src/redundant_clone.rs b/clippy_lints/src/redundant_clone.rs
index b4502c668dc..344ed02361d 100644
--- a/clippy_lints/src/redundant_clone.rs
+++ b/clippy_lints/src/redundant_clone.rs
@@ -18,6 +18,7 @@
 use rustc_session::{declare_lint_pass, declare_tool_lint};
 use rustc_span::source_map::{BytePos, Span};
 use std::convert::TryFrom;
+use std::ops::ControlFlow;
 
 macro_rules! unwrap_or_continue {
     ($x:expr) => {
@@ -517,7 +518,10 @@ fn visit_assign(&mut self, place: &mir::Place<'tcx>, rvalue: &mir::Rvalue<'_>, _
                 self.possible_borrower.add(borrowed.local, lhs);
             },
             other => {
-                if !ContainsRegion.visit_ty(place.ty(&self.body.local_decls, self.cx.tcx).ty) {
+                if ContainsRegion
+                    .visit_ty(place.ty(&self.body.local_decls, self.cx.tcx).ty)
+                    .is_continue()
+                {
                     return;
                 }
                 rvalue_locals(other, |rhs| {
@@ -539,7 +543,7 @@ fn visit_terminator(&mut self, terminator: &mir::Terminator<'_>, _loc: mir::Loca
             // If the call returns something with lifetimes,
             // let's conservatively assume the returned value contains lifetime of all the arguments.
             // For example, given `let y: Foo<'a> = foo(x)`, `y` is considered to be a possible borrower of `x`.
-            if !ContainsRegion.visit_ty(&self.body.local_decls[*dest].ty) {
+            if ContainsRegion.visit_ty(&self.body.local_decls[*dest].ty).is_continue() {
                 return;
             }
 
@@ -558,8 +562,8 @@ fn visit_terminator(&mut self, terminator: &mir::Terminator<'_>, _loc: mir::Loca
 struct ContainsRegion;
 
 impl TypeVisitor<'_> for ContainsRegion {
-    fn visit_region(&mut self, _: ty::Region<'_>) -> bool {
-        true
+    fn visit_region(&mut self, _: ty::Region<'_>) -> ControlFlow<()> {
+        ControlFlow::BREAK
     }
 }