1 /*

     2  * @test /nodynamiccopyright/

     3  * @bug 8138840 8139243 8139249

     4  * @summary Compiler crashes when compiling bitwise operations with illegal operand types

     5  *          'void' is erroneously accepted as a possible operand for string concatenation

     6  * @compile/fail/ref=T8139243.out -XDrawDiagnostics T8139243.java

     7  */

     8 

     9 class T8139243 {

    10 

    11     void test(String s) {

    12         s += m(); // compile time error

    13     }

    14 

    15     void m() { }

    16 }