First, thank you all for the explanations (sorry for the misleading title about the memoryview, should I rename it?).

> @Brian: this isn't a crash.  It is completely equivalent to pressing <ctl>D at the interactive interpreter prompt.

Not exactly, at least on Windows if I type ^Z + <enter> (which is the equivalent of ^D) the shell exits normally, while here there's an "annoying" error message (I don't say that it's important, just that that's not completely equivalent)