Extend an interface with default method, existing code using that interface build with -target 1.5 will cause throwing java.lang.VerifyError with "Illegal use of nonvirtual function call".

Attached is a test case to illustrate the bug.

Build TestInterface.java + MyInterface.java.1.5(rename to MyInterface.java) with
$ cp MyInterface.java.1.5 MyInterface.java
$ javac -source 1.5 -target 1.5 TestInterface.java
$java TestInterface
foo

Now replace MyInterface with new version,

$ cp MyInterface.java.1.8 MyInterface.java
$ javac MyInterace.java
$ java TestInterface
Exception in thread "main" java.lang.VerifyError: (class: TestInterface$1, method: bar signature: ()V) Illegal use of nonvirtual function call
at TestInterface.main(TestInterface.java:3)


Note that build to target 1.6 works as expected.