FULL PRODUCT VERSION :
java version 1.7.0-ea, build b76

ADDITIONAL OS VERSION INFORMATION :
XP ver 5.1.2600

A DESCRIPTION OF THE PROBLEM :
javac in java 1.6 as well as 1.7 b 76 allows the compilation of following:

public class A
{
  {
    if (true)
    throw new NullPointerException();
  }
  A() {
  }
}

while for the following case without the if(true), it gives error: initializer must be able to complete normally

public class A
{
  {
    throw new NullPointerException();
  }
  A() {
  }
}

This is ambiguous behaviour when we know that an intializer has to complete normally in all cases. The first case reported above hence is wrongly compiled.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Use the example class A given above to compile.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Error : initializer must be able to complete normally
ACTUAL -
no error

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
public class A
{
  {
    if (true)
    throw new NullPointerException();
  }
  A() {
  }
}
---------- END SOURCE ----------