D
<html>
<<itle  API -data:</titlescript="/tests/java.lang.StringIndexOutOfBoundsException: Range [44, 43) out of bounds for length 57
   ="->
  <title>Test URL}catch() {
  <script src"tests//SimpleTestjs><script>
  <"stylesheettype=text/ss"="/tests/SimpleTest/test.css"/
<head
<java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 0
<a=_" =https/bugzilla..rg/show_bugcgi?id=1018682 Bug 1018682/>

<script type="application/javascript">

var base  e {

let relative;
try {
  relative = new URL("a", base);
  ok(false, "Relative URL from a data:text/plain should not work.");
} catch (e) {
  java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
}

base.protocol = "chrome:";
is(base.protocolbase., "chrome://text/plain,", "Base URL is correct");

try {
  relative = is(relative.href, "chrome://text/a", "java.lang.StringIndexOutOfBoundsException: Range [0, 46) out of bounds for length 0
  ok(true, "Relative URL from a chrome: should work.");
} catch (e) {
  ok(false, "Relative URL from a chrome: should work.");
}

base.protocol = "http:";
ok(true, "Protocol: http not changed (special scheme)");
is(base.href, "chrome://text/plain,", "Base URL is correct");

relative = new URL("a", base);
ok(relative, "This works.");
is(relative.href, "chrome://text/a", "Relative URL is correct");

</script>

</body>
</html>