crash.d
```
import std.stdio;
union U {
float f;
int i;
string toString ()
{
string s;
return s;
}
}
void main ()
{
U u;
writeln (u);
}
```
$ dmd crash.d
$ ./crash
std.exception.ErrnoException@/.../dmd2/linux/bin64/../../src/phobos/std/stdio.d(2776):
(Bad address)
----------------
??:? @safe int std.exception.errnoEnforce!(int,
"/.../dmd2/linux/bin64/../../src/phobos/std/stdio.d",
2776uL).errnoEnforce(int, lazy immutable(char)[]) [0x43f20a]
??:? @safe void
std.stdio.File.LockingTextWriter.put!(immutable(char)[]).put(immutable(char)[]) [0x4422a7]
??:? @safe void
std.range.primitives.doPut!(std.stdio.File.LockingTextWriter,
immutable(char)[]).doPut(ref std.stdio.File.LockingTextWriter,
ref immutable(char)[]) [0x44224b]
??:? @safe void
std.range.primitives.put!(std.stdio.File.LockingTextWriter,
immutable(char)[]).put(ref std.stdio.File.LockingTextWriter,
immutable(char)[]) [0x44222b]
??:? void
std.format.formatObject!(std.stdio.File.LockingTextWriter,
crash.U, char).formatObject(ref std.stdio.File.LockingTextWriter,
ref crash.U, ref const(std.format.FormatSpec!(char).FormatSpec))
[0x44220a]
??:? void
std.format.formatValue!(std.stdio.File.LockingTextWriter,
crash.U, char).formatValue(ref std.stdio.File.LockingTextWriter,
ref crash.U, ref const(std.format.FormatSpec!(char).FormatSpec))
[0x44219d]
??:? uint
std.format.formattedWrite!(std.stdio.File.LockingTextWriter,
char, crash.U).formattedWrite(ref
std.stdio.File.LockingTextWriter, const(char[]), crash.U)
[0x43e703]
??:? void std.stdio.File.write!(crash.U, char).write(crash.U,
char) [0x43e3f5]
??:? void std.stdio.writeln!(crash.U).writeln(crash.U) [0x43e389]
??:? _Dmain [0x43e344]
