src/jdk.internal.clang/share/classes/jdk/internal/clang/SourceLocation.java

*** 110,116 ****
--- 110,121 ----
  
          @Override
          public int hashCode() {
              return Objects.hashCode(path) ^ line ^ column ^ offset;
          }
+ 
+         @Override
+         public String toString() {
+             return Objects.toString(path) + ":" + line + ":" + column + ":" + offset;
+         }
      }
  }