Linux: out# results hidden after call to println!()

[kurtlawrence]

eg

papyrus=> 5+6
papyrus [out0]: 11
papyrus=> println!("adf")
papyrus [out1]: ()
papyrus=> 8+9
papyrus [out2]: ()

might be related to #15, the out2 should be 17

[kurtlawrence]

fixed in 0441e5b

This issue was a little subtle to work out. Basically the api function dlopen will keep loaded libraries in memory to avoid continuously allocating memory. It only does not release the library when thread_local data is hanging around, and it seems println!() is something that does this. Hence to avoid not having the library not updated with a new new() call, the library is renamed and a different lib name is passed to the function. This is very annoying as it has needless fs interactions and a growing fs footprint but what can you do ¯_(ツ)_/¯

see:

• TLS destructors are not run on Library::drop resulting in illegal instruction on OS X nagisa/rust_libloading#5
• SEGFAULT sometimes occurs when testing libloading code nagisa/rust_libloading#41
• drop() not called automatically on FreeBSD/ HardenedBSD nagisa/rust_libloading#49