gcc/testsuite/gdc.test/fail_compilation/fail218.d

/*
TEST_OUTPUT:
---
fail_compilation/fail218.d(15): Error: cannot modify string literal `", "`
---
*/

// https://issues.dlang.org/show_bug.cgi?id=1788
// dmd segfaults without info
void main()
{
    string a = "abc";
    double b = 7.5;

    a ~= ", " ~= b;
}