WTF: dmd 2.066 vs. dmd 2.067 really dangerous code breakage

[John Colvin via Digitalmars-d]

On Wednesday, 22 April 2015 at 11:28:44 UTC, Daniel Kozak wrote:
> This code compile fine under both versions:
>
> dmd (2.066, -debug -d):
> OK
>
> dmd (2.067, -debug -d):
> core.exception.AssertError at main.d(24): Assertion failure
> ----------------
> ./main() [0x46413f]
> ./main(_Dmain+0x86) [0x449996]
> ./main(_D2rt6dmain211_d_run_mainUiPPaPUAAaZiZ6runAllMFZ9__lambda1MFZv+0x1f) 
> [0x467d53]
> ./main(void rt.dmain2._d_run_main(int, char**, extern (C) int 
> function(char[][])*).tryExec(scope void delegate())+0x2a) 
> [0x467ca6]
> ./main(void rt.dmain2._d_run_main(int, char**, extern (C) int 
> function(char[][])*).runAll()+0x30) [0x467d0c]
> ./main(void rt.dmain2._d_run_main(int, char**, extern (C) int 
> function(char[][])*).tryExec(scope void delegate())+0x2a) 
> [0x467ca6]
> ./main(_d_run_main+0x1dc) [0x467c20]
> ./main(main+0x17) [0x464157]
> /usr/lib/libc.so.6(__libc_start_main+0xf0) [0x7f4b8d440800]

What code?