Allow empty first parts of ConsStrings

test/mjsunit/regress/regress-5440.js

Index: test/mjsunit/regress/regress-5440.js
diff --git a/test/mjsunit/regress/regress-crbug-644631.js b/test/mjsunit/regress/regress-5440.js
similarity index 61%
copy from test/mjsunit/regress/regress-crbug-644631.js
copy to test/mjsunit/regress/regress-5440.js
index 5e649a49463791f960bc635f207c3ab69d3b2169..4182146b1a4f00e90895a8fbabab754e986b0b8c 100644
--- a/test/mjsunit/regress/regress-crbug-644631.js
+++ b/test/mjsunit/regress/regress-5440.js
@@ -4,9 +4,5 @@
 
 // Flags: --turbo --always-opt
 
-function f() {
-  new Int8Array(new ArrayBuffer(2147483648));
-}
-
-// Should not crash
-assertThrows(f, RangeError);
+// The rightmost cons string is created first, resulting in an empty left part.
+eval(" " + ("" + "try {;} catch (_) {}"));