Chapter 55 Onwards WASM Crashes

[thatzopoulos]

When playing the WASM version of chapter 55, trying to leave the town via the staircases crashes the game. I have been implementing the tutorial and my version was working fine until implementing backtracking as well so I think it has something to do with the refactor of that code. Tested on Chrome on a Mac and Chromium on Archlinux I have the same problems for all WASM examples from 55 to the most recent although the normal compiled versions of the roguelike run fine.

[thebracket]

Thanks for letting me know! I'll see what I can do to fix the situation.

[thebracket]

Testing this: it's interesting. Running on native (Windows 10, 64-bit), the transitions happen just fine. On the WASM build, it locks up. It looks like there's a "print" leftover from some debugging that is causing the issue. The stack-trace:

Uncaught RuntimeError: unreachable
    at __rust_start_panic (wasm-function[3283]:0x1f6137)
    at rust_panic (wasm-function[2659]:0x1f353d)
    at std::panicking::rust_panic_with_hook::hdf14da40c6b51ea2 (wasm-function[1789]:0x1d4e97)
    at std::panicking::continue_panic_fmt::hf8630aaa243736ee (wasm-function[2294]:0x1ecbba)
    at rust_begin_unwind (wasm-function[3126]:0x1f5a7e)
    at core::panicking::panic_fmt::hdeb7979ab6591473 (wasm-function[2595]:0x1f2a0f)
    at core::option::expect_failed::h6c3ec3658ee2670d (wasm-function[2414]:0x1efbc2)
    at std::io::stdio::stdout::hcbcc6a8a2e793625 (wasm-function[1369]:0x1b1c5c)
    at std::io::stdio::_print::hefd4b7238a059d41 (wasm-function[747]:0x15d3d7)
    at chapter_60_caverns3::map::dungeon::level_transition::h6efe2f2377ab4936 (wasm-function[114]:0x350b9)

That makes me wonder if any print call is causing breakage (it used to work!). I'll see what I can find.

[thebracket]

I've confirmed that it's println! that breaks it in WASM. I then found out that my console::log function in RLTK had a similar problem, despite being designed to work around just that issue. So I just fixed it upstream, once the publish is finished I can push a fix for this issue.

[thatzopoulos]

Fantastic! I'll test it out on my machines once its published

[thebracket]

Ok, it's live. I can transition between levels on my two test browsers here, and the console log is properly showing entries.

[thatzopoulos]

Updated all my println! calls and upgraded rltk_rs to the newest version and can confirm it works now