1 files changed, 2 insertions, 2 deletions
diff --git a/lib/Expr/ExprPPrinter.cpp b/lib/Expr/ExprPPrinter.cpp
index ba0458ae..72544fbd 100644
--- a/lib/Expr/ExprPPrinter.cpp
+++ b/lib/Expr/ExprPPrinter.cpp
@@ -143,7 +143,7 @@ private:
     auto head = updates.head;
 
     // Special case empty list.
-    if (head.isNull()) {
+    if (!head) {
       // FIXME: We need to do something (assert, mangle, etc.) so that printing
       // distinct arrays with the same name doesn't fail.
       PC << updates.root->name;
@@ -154,7 +154,7 @@ private:
     bool openedList = false, nextShouldBreak = false;
     unsigned outerIndent = PC.pos;
     unsigned middleIndent = 0;
-    for (auto un = head; !un.isNull(); un = un->next) {
+    for (auto un = head; un; un = un->next) {
       // We are done if we hit the cache.
       std::map<const UpdateNode *, unsigned>::iterator it =
           updateBindings.find(un.get());