diff --git a/src/services/smartSelection.ts b/src/services/smartSelection.ts
index d0423ce031e57..3765c39ed7aa5 100644
--- a/src/services/smartSelection.ts
+++ b/src/services/smartSelection.ts
@@ -64,6 +64,13 @@ namespace ts.SmartSelectionRange {
                     parentNode = node;
                     break;
                 }
+
+                // If we made it to the end of the for loop, we’re done.
+                // In practice, I’ve only seen this happen at the very end
+                // of a SourceFile.
+                if (i === children.length - 1) {
+                    break outer;
+                }
             }
         }
 
diff --git a/tests/baselines/reference/smartSelection_lastBlankLine.baseline b/tests/baselines/reference/smartSelection_lastBlankLine.baseline
new file mode 100644
index 0000000000000..3cbad44aac47e
--- /dev/null
+++ b/tests/baselines/reference/smartSelection_lastBlankLine.baseline
@@ -0,0 +1,5 @@
+class C {}
+/**/
+
+
+class C {}↲
diff --git a/tests/cases/fourslash/smartSelection_lastBlankLine.ts b/tests/cases/fourslash/smartSelection_lastBlankLine.ts
new file mode 100644
index 0000000000000..2f5cc3f07fc0e
--- /dev/null
+++ b/tests/cases/fourslash/smartSelection_lastBlankLine.ts
@@ -0,0 +1,5 @@
+/// <reference path="fourslash.ts" />
+////class C {}
+/////**/
+
+verify.baselineSmartSelection();