This is not easy to try. So I need ask, maybe someone has experienced.

What happens if memory allocation fails with "new" keyword? Does it
throw an exception? throwable?

All I want is to be able to catch OutOfMemory event, and take other
steps based on that.

Currently it crashes: https://issues.dlang.org/show_bug.cgi?id=1180

On Saturday, 20 February 2016 at 14:21:28 UTC, tcak wrote:
> What happens if memory allocation fails with "new" keyword?

Be aware that memory allocation might never actually fail. It really depends on the operating system.

But if it did fail, it would throw OutOfMemoryError

http://dpldocs.info/experimental-docs/core.exception.OutOfMemoryError.html

On Sat, 20 Feb 2016 16:58:02 +0000, Adam D. Ruppe wrote:

> On Saturday, 20 February 2016 at 14:21:28 UTC, tcak wrote:
>> What happens if memory allocation fails with "new" keyword?
> 
> Be aware that memory allocation might never actually fail. It really depends on the operating system.
> 
> But if it did fail, it would throw OutOfMemoryError
> 
> http://dpldocs.info/experimental-docs/
core.exception.OutOfMemoryError.html

That should work for address space exhaustion on most any OS and configuration. Physical memory plus swap exhaustion, not so much, thanks to memory overcommitment.