shell doesn't throw on error. Is that a regression?

[timotheecour]

The doc for std.process.shell says "If the process could not be 
started or exits with an error code, throws an exception."

However on OSX I'm having a different kind of behavior.
Isn't there a unittest to test this?
---
import std.process;
import std.stdio;

void main(){
        shell("asfasfasdfasdf");
        writeln("ok");
}
---
prints:

in dmd.2.061 - 2.059:
sh: asfasfasdfasdf: command not found
ok

in dmd.2.057:
sh: asfasfasdfasdf: command not found
std.exception.ErrnoException@std/stdio.d(418): Could not close 
pipe `asfasfasdfasdf' (Undefined error: 0)