StackTraceElement#getFileName of EvalException/UnresolvedException does not retrieve ids from custom id generators.

Code to reproduce:
 JShell.Builder builder = JShell.builder().idGenerator(((snippet, id) -> "custom" + id));
 try (JShell jShell = builder.build()) {
     EvalException evalException = (EvalException) jShell.eval("throw new Error();").get(0).exception();
     for (StackTraceElement ste : evalException.getStackTrace()) {
         assertTrue(ste.getFileName().startsWith("custom"), "Not started with \"custom\": " + ste.getFileName());
     }
 }

Regression test: IdGeneratorTest#testIdInException.