FULL PRODUCT VERSION :
java 8.0_151

ADDITIONAL OS VERSION INFORMATION :
ver Server 2012 R2

A DESCRIPTION OF THE PROBLEM :
if lambda expression was input to a Supplier without being cast, the error 'Internal compiler error: java.lang.UnsupportedOperationException: no glb for [public abstract class java.lang.Number' would occur.



REGRESSION. Last worked in version 8u144

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Create a child method where it takes Supplier<O> as a parameter and input a lambda expression without a cast. I used a method where the parameter was Supplier<O>...

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
For the project to build/compile and not crash.
ACTUAL -
The error 'Internal compiler error: java.lang.UnsupportedOperationException: no glb for [public abstract class java.lang.Number' was thrown thus preventing the whole project from compiling.

ERROR MESSAGES/STACK TRACES THAT OCCUR :
Internal compiler error: java.lang.UnsupportedOperationException: no glb for [public abstract class java.lang.Number

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
public < O > O run( Function< Foo, O > func ){
    if( func == null )
        return null;
    return firstNotNull( () -> func.apply( foo1 ),
                                   () -> func.apply( foo2 ) );
}

@SafeVarargs
public static final < O > O firstNotNull( Supplier< O >... funcs ){
    for( Supplier< O > func : funcs ){
        O obj = func.get();
        if( obj != null )
            return obj;
    }
    return null;
}
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
return firstNotNull( (Supplier< O >) () -> func.apply( foo1 ),
                               (Supplier< O >) () -> func.apply( foo2 ) );