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Cowsay in WebAssembly

Home Page: https://wasmer.io/syrusakbary/cowsay

License: MIT License

Rust 100.00%

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jcaesar isgasho narigo evacchi

cowsay's Issues

Unreachable code panic when run in the browser

Hi, I'm playing with @wasmer/wasi in the browser environment found out that the current version of cowsay downloaded via wapm (0.2.0) doesn't work, resulting in the below exception. Note that other packages do work using with the following code snippet. So far I only tried cowsay and "huhn/hello-wasm".

Exception from chrome:

Uncaught (in promise) RuntimeError: unreachable
at rust_panic (:wasm-function[685]:0x4d8e6)
at _ZN3std9panicking20rust_panic_with_hook17h915896130bbbef4eE (:wasm-function[202]:0x1a04b)
at _ZN3std9panicking18continue_panic_fmt17h273222db9d5894b3E (:wasm-function[720]:0x4ef61)
at rust_begin_unwind (:wasm-function[619]:0x4afb4)
at _ZN4core9panicking9panic_fmt17hade9d5174dac2b2bE (:wasm-function[249]:0x1e388)
at _ZN4core9panicking18panic_bounds_check17h55b51e817be982c8E (:wasm-function[37]:0x2e0e)
at _ZN6cowsay4main17h8d51d1f6d9e8b09aE (:wasm-function[44]:0x5c5f)
at ZN3std2rt10lang_start28$u7b$$u7b$closure$u7d$$u7d$17h269cebd620f9f473E (:wasm-function[20]:0x1bcb)
at _ZN3std10sys_common9backtrace28__rust_begin_short_backtrace17hc121d5dc89b45d51E (:wasm-function[112]:0x13fdf)
at main (:wasm-function[110]:0x13d79)
Also happens in firefox.

import * as React from 'react';

import { WASI } from "@wasmer/wasi";
import wasiBindings from "@wasmer/wasi/lib/bindings/browser";
import { WasmFs } from "@wasmer/wasmfs";

const wasmFs = new WasmFs();

const wasi = new WASI({
	args: [],
	env: {},
	bindings: {
		...wasiBindings,
		fs: wasmFs.fs
	}
});

const startWasiTask = async () => {
	const response = await fetch("./cowsay.wasm");
	const responseArrayBuffer = await response.arrayBuffer();

	const wasm_bytes = new Uint8Array(responseArrayBuffer);
	let module = await WebAssembly.compile(wasm_bytes);
	let instance = await WebAssembly.instantiate(module, {
		...wasi.getImports(module)
	});

	wasi.start(instance);

	const stdout = await wasmFs.getStdOut();
	console.log(stdout);
};
startWasiTask();

Newlines are not treated

$ echo -e a\nb\nc | cowsay
 _______ 
< a b c >
 ------- 
        \   ^__^
         \  (oo)\_______
            (__)\       )\/\
                ||----w |
                ||     ||

$ echo -e a\nb\nc | cargo run --
 _______
< a
b
c >
 -------
        \   ^__^
         \  (oo)\_______
            (__)\       )\/\
               ||----w |
                ||     ||

Might also need some extra treatment for full-width characters…

 _______________________________
< ありがとうMrロボット >
 -------------------------------
        \   ^__^
         \  (oo)\_______
            (__)\       )\/\
               ||----w |
                ||     ||

(admittedly, normal cowsay also fails on this one)

$ echo ありがとうMrロボット | cowsay
 _____________ 
< ありがとうMrロボット >
 ------------- 
        \   ^__^

`wasmer run cowsay 'what' -- --random` panics

Title^

Here's the backtrace:

thread 'main' panicked at 'internal error: entered unreachable code', /Users/syrusakbary/.cargo/registry/src/github.com-1ecc6299db9ec823/rand-0.4.6/src/jitter.rs:703:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
error: RuntimeError: unreachable
    at rust_panic (<module>[581]:0x467b5)
    at std::panicking::rust_panic_with_hook::h1c67ce6bc4eb31b7 (<module>[270]:0x1ad0c)
    at std::panicking::begin_panic_handler::{{closure}}::h749586aa4ef76f6f (<module>[590]:0x46f51)
    at std::sys_common::backtrace::__rust_end_short_backtrace::h426b71926848cb31 (<module>[589]:0x46eb9)
    at rust_begin_unwind (<module>[491]:0x41603)
    at core::panicking::panic_fmt::hf4ce15c1b219b988 (<module>[91]:0x10fa0)
    at core::panicking::panic::h8fa39a92dcc1b069 (<module>[86]:0x108a5)
    at rand::StdRng::new::hb4f63eea71fa4728 (<module>[70]:0xfacb)
    at cowsay::main::h0341b02cf26fb7f7 (<module>[34]:0x48b0)
    at std::sys_common::backtrace::__rust_begin_short_backtrace::hd209db048344c68d (<module>[13]:0x109d)
    at __main_void (<module>[93]:0x1116a)
    at _start (<module>[9]:0x6f7)
╰─▶ 1: RuntimeError: unreachable
           at rust_panic (<module>[581]:0x467b5)
           at std::panicking::rust_panic_with_hook::h1c67ce6bc4eb31b7 (<module>[270]:0x1ad0c)
           at std::panicking::begin_panic_handler::{{closure}}::h749586aa4ef76f6f (<module>[590]:0x46f51)
           at std::sys_common::backtrace::__rust_end_short_backtrace::h426b71926848cb31 (<module>[589]:0x46eb9)
           at rust_begin_unwind (<module>[491]:0x41603)
           at core::panicking::panic_fmt::hf4ce15c1b219b988 (<module>[91]:0x10fa0)
           at core::panicking::panic::h8fa39a92dcc1b069 (<module>[86]:0x108a5)
           at rand::StdRng::new::hb4f63eea71fa4728 (<module>[70]:0xfacb)
           at cowsay::main::h0341b02cf26fb7f7 (<module>[34]:0x48b0)
           at std::sys_common::backtrace::__rust_begin_short_backtrace::hd209db048344c68d (<module>[13]:0x109d)
           at __main_void (<module>[93]:0x1116a)
           at _start (<module>[9]:0x6f7)

I executed this on MacBook Pro x86

wapm-packages / cowsay Goto Github PK

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cowsay's Issues

Unreachable code panic when run in the browser

Newlines are not treated

`wasmer run cowsay 'what' -- --random` panics

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