[Issue 15274] New: typeid(this) inside of an interface contract segfaults

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=15274

          Issue ID: 15274
           Summary: typeid(this) inside of an interface contract segfaults
           Product: D
           Version: D2
          Hardware: x86_64
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: initrd.gz at gmail.com

Example code:

    interface MyFace {
        Object bar()
        out(v) {
            assert(typeid(this));
        }
    }

    class MyClass : MyFace {
        override Object bar() {
            return new MyClass();
        }
    }

    void main() {
        (new MyClass()).bar();
    }

This code causes a segfault when ran. Removing the `assert(typeid(this))` line
causes the error to go away. Putting the out contract on the class also does
not cause an error.

GDB output:

(gdb) bt
#0  0x000000000041f3d9 in invariant._d_invariant() ()
#1  0x000000000041dbd4 in test.MyFace.bar() (this=0x7fffffffdca8, 
    v=@0x7fffffffdca0: 0x7ffff7ed0020) at ./test.d:5
#2  0x000000000041dc45 in test.MyClass.bar() (this=0x7ffff7ed0000)
    at ./test.d:10
#3  0x000000000041dc80 in D main () at ./test.d:16
#4  0x000000000041f35f in rt.dmain2._d_run_main() ()
#5  0x000000000041f2ba in rt.dmain2._d_run_main() ()
#6  0x000000000041f31b in rt.dmain2._d_run_main() ()
#7  0x000000000041f2ba in rt.dmain2._d_run_main() ()
#8  0x000000000041f23a in _d_run_main ()
#9  0x000000000041dd28 in main ()

Version:

> dmd --version
DMD64 D Compiler v2.068.2
Copyright (c) 1999-2015 by Digital Mars written by Walter Bright

--