FULL PRODUCT VERSION :
1.8.0_20

ADDITIONAL OS VERSION INFORMATION :
Windws 7

A DESCRIPTION OF THE PROBLEM :
public class Java8Bug {

    public Java8Bug() {
        new JPanel() {
            {
                new Runnable() {
                    @Override
                    public void run() {
                        show("test");
                    }
                }.run();
            }
        };
    }

    public void show(String string) {

    }
}

This compiled in java 7, in java 8 show(String) gets hidden, with the compiler error

error: incompatible types: String cannot be converted to boolean

REGRESSION. Last worked in version 7u10

ADDITIONAL REGRESSION INFORMATION:
1.7_09

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
compile the code

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
code compiles
ACTUAL -
compile gives error error: incompatible types: String cannot be converted to boolean

ERROR MESSAGES/STACK TRACES THAT OCCUR :
error: incompatible types: String cannot be converted to boolean

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
public class Java8Bug {

    public Java8Bug() {
        new JPanel() {
            {
                new Runnable() {
                    @Override
                    public void run() {
                        show("test");
                    }
                }.run();
            }
        };
    }

    public void show(String string) {

    }
}

---------- END SOURCE ----------