This Week in Rust and WebAssembly 11

Feb 21, 2019

Hello and welcome to another issue of This Week in Rust and WebAssembly!

Rust is a systems language pursuing the trifecta: safety, concurrency, and speed.

WebAssembly is a stack-based virtual machine and instruction set. It is fast, safe, portable, and part of the open Web platform. By compiling to WebAssembly, we can run Rust code on the Web!

This is a weekly summary of Rust and WebAssembly’s progress and community.

Did we miss something? Tweet to us at @rustwasm or send us a pull request.

Want to get involved in Rust and WebAssembly? Join the Rust and WebAssembly working group!

News and Blog Posts from Around the Web

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Updates from rustwasm/*

New RFCs

None.

Merged RFCs

None.

console_error_panic_hook

• @fitzgen added error stacks to the message we log when a panic occurs. This works around bugs in both Safari’s and Firefox’s developer tools consoles.

js-sys

• @Pauan added convenience getters to js_sys::Reflect for getting properties keyed by u32 and f64.

Twiggy🌱

• @data-pup fixed some unused-result warnings in Twiggy’s parser.

walrus

• @alexcrichton made GC’ing unused functions, globals, etc an explicit pass in walrus. It was previously performed implicitly as part of serializing a wasm module.
• @alexcrichton implemented support for the reference types proposal and anyref in walrus.
• @fitzgen added the ability to explicitly delete various wasm constructs (functions, tables, etc) from a wasm module, rather than just implicitly delete them by making them unused and then running a GC.

wasm-bindgen

• @alexcrichton added support for Option<MyRustStruct> in parameters and return positions.
• @alexcrichton added experimental support for using anyref in wasm-bindgen.
• @fitzgen fixed a regression where DWARF debug info custom sections were always being included in the generated Wasm, even when debug info was not enabled.
• @alexcrichton added a flag to control whether the producers custom section is included in the generated wasm binary or not.
• @ctjhoa fixed some deprecation warnings around the use of ATOMICS_*_INIT instead of Atomic*::new.

wasm-snip

• @fitzgen ported wasm-snip over to using the walrus crate. This also removes the need to wasm-gc again after running wasm-snip.

web-sys

• @selaux added a missing Web IDL attribute to HTMLMediaElement so that web-sys correctly generates bindings to the srcObject property.

wee_alloc

• We released wee_alloc version 0.4.3! 🎉 Among other things, this version will work on stable Rust as soon as 1.33 is released, which is scheduled for one week from today: 2019-02-28.

Requests for Contribution

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