Rustc should emit name section for function names

[edre]

Webassembly supports a special custom section called "name" to assign names to functions and locals to aid in runtime debugging. For example, the stack traces I get in chrome should have my actual function names instead of random ids. LLVM seems to have support for this, but there is no name section emitted from rustc in either debug or release mode.

https://play.rust-lang.org/?gist=61eee1e3c108ca6db8adf709897feacc&version=nightly

[fitzgen]

It does if you enable debugging symbols:

[profile.release]
debug = true

[edre]

Why are debugging symbols not enabled by default in debug mode?

[fitzgen]

All of debug builds are semi-broken with wasm at the moment. I don't recommend using them.

[edre]

In a future where debug builds are not broken, they're supposed to come with debugging symbols, right?

[fitzgen]

Yeah, I think so.

[edre]

This issue probably doesn't need to be tracked separately then.