FULL PRODUCT VERSION :
javac 1.8.0-ea


FULL OS VERSION :
 2013 x86_64 x86_64 x86_64 GNU/Linux

A DESCRIPTION OF THE PROBLEM :
The following piece of code crashes javac version 8, buts works fine on version 7:

class TestParamSubtype<T> {
  private T p;
  void foo(T p) {}
  public Object clone() {
    foo(p.clone());
    return null;
} }

java.lang.AssertionError: isSubClass T
at com.sun.tools.javac.code.Symbol.isSubClass(Symbol.java:329)
at com.sun.tools.javac.comp.Resolve.isProtectedAccessible(Resolve.java:433)
at com.sun.tools.javac.comp.Resolve.isAccessible(Resolve.java:389)
at com.sun.tools.javac.comp.Resolve.isAccessible(Resolve.java:359)
at com.sun.tools.javac.comp.Resolve.selectBest(Resolve.java:1361)
at com.sun.tools.javac.comp.Resolve.findMethodInScope(Resolve.java:1522)
at com.sun.tools.javac.comp.Resolve.findMethod(Resolve.java:1594)
at com.sun.tools.javac.comp.Resolve.findMethod(Resolve.java:1566)
at com.sun.tools.javac.comp.DeferredAttr$DeferredChecker$1.lookup(DeferredAttr.java:949)
...(more omitted)...
at com.sun.tools.javac.main.JavaCompiler.attribute(JavaCompiler.java:1224)
at com.sun.tools.javac.main.JavaCompiler.compile2(JavaCompiler.java:877)
at com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:836)
at com.sun.tools.javac.main.Main.compile(Main.java:518)
at com.sun.tools.javac.main.Main.compile(Main.java:376)
at com.sun.tools.javac.main.Main.compile(Main.java:365)
at com.sun.tools.javac.main.Main.compile(Main.java:356)
at com.sun.tools.javac.Main.compile(Main.java:77)
at com.sun.tools.javac.Main.main(Main.java:62)

I did not attempt further debugging.

THE PROBLEM WAS REPRODUCIBLE WITH -Xint FLAG: Did not try

THE PROBLEM WAS REPRODUCIBLE WITH -server FLAG: Did not try

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Attempt to compile:

class TestParamSubtype<T> {
  private T p;
  void foo(T p) {}
  public Object clone() {
    foo(p.clone());
    return null;
} }

EXPECTED VERSUS ACTUAL BEHAVIOR :
Result on java v7:

TestParamSubtype.java:6: error: clone() has protected access in Object
    foo(p.clone());
         ^
TestParamSubtype.java:6: error: method foo in class TestParamSubtype<T> cannot be applied to given types;
    foo(p.clone());
    ^
  required: T
  found: Object
  reason: actual argument Object cannot be converted to T by method invocation conversion
  where T is a type-variable:
    T extends Object declared in class TestParamSubtype
2 errors

Actual:

Crash
REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
class TestParamSubtype<T> {
  private T p;
  void foo(T p) {}
  public Object clone() {
    foo(p.clone());
    return null;
} }
---------- END SOURCE ----------