FULL PRODUCT VERSION :
java version "1.8.0_77"
Java(TM) SE Runtime Environment (build 1.8.0_77-b03)
Java HotSpot(TM) 64-Bit Server VM (build 25.77-b03, mixed mode)


ADDITIONAL OS VERSION INFORMATION :
Darwin xxxx 14.5.0 Darwin Kernel Version 14.5.0: Mon Jan 11 18:48:35 PST 2016; root:xnu-2782.50.2~1/RELEASE_X86_64 x86_64


A DESCRIPTION OF THE PROBLEM :
Upon encountering a certain error, the Java compiler reports the error on standard output.

However, the line quoted in the error message is from the wrong file.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. Create TWO separate source files, x1.java and x2.java as shown:

========== x1.java =============
public class x1 implements x2 {
    // this is a comment in file x1
    float x = VAL;
}

========== x2.java =============
public interface x2 {
    float VAL = 1.0;
}

Note that x2.java contains an error (lossy conversion from double to float).

2. Compile the files: javac x1.java x2.java

3. Witness the following output with a line from x1.java. It should be x2.java instead:

x1.java:2: error: incompatible types: possible lossy conversion from double to float
    // this is a comment in file x1
      ^
1 error


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
x2.java:2: error: incompatible types: possible lossy conversion from double to float
    float VAL = 1.0;
                   ^
1 error
ACTUAL -
x1.java:2: error: incompatible types: possible lossy conversion from double to float
    // this is a comment in file x1
      ^
1 error

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
========== x1.java =============
public class x1 implements x2 {
    // this is a comment in file x1
    float x = VAL;
}

========== x2.java =============
public interface x2 {
    float VAL = 1.0;
}
---------- END SOURCE ----------