wasm compiling error occured behind the emcc

[vvakame]

related: emscripten-core/emscripten#5007

I tried this code:

$ source ~/work/emsdk_portable/emsdk_env.sh
$ echo "pub fn main() {}" > main.rs
$ rustc --target wasm32-unknown-emscripten main.rs

I expected to see this happen: compiled successfully.

Instead, this happened: emcc reporting errors.

Meta

rustc --version --verbose:

$ rustc --version --verbose
rustc 1.17.0-nightly (b1e31766d 2017-03-03)
binary: rustc
commit-hash: b1e31766da75b188062c59f38cd6e8544b902afd
commit-date: 2017-03-03
host: x86_64-apple-darwin
release: 1.17.0-nightly
LLVM version: 3.9

Backtrace: None.

This issue can see by emscripten-core/emscripten#5004 .
and suppressed now by emscripten-core/emscripten@93a082b .

root cause,
*.rlib pass to llvm-nm, llvm-nm reporting errors.

$ /usr/local/Cellar/llvm/3.9.1/bin/llvm-nm /Users/vvakame/.rustup/toolchains/nightly-x86_64-apple-darwin/lib/rustlib/wasm32-unknown-emscripten/lib/libstd-9a66b6a343d52844.rlib

std-9a66b6a343d52844.0.o:
         U _Unwind_Backtrace
         U _Unwind_FindEnclosingFunction
         U _Unwind_GetIPInfo
-------- T _ZN101_$LT$$RF$$u27$a$u20$$u5b$std..net..addr..SocketAddr$u5d$$u20$as$u20$std..net..addr..ToSocketAddrs$GT$15to_socket_addrs17h5114a9a05148274dE
-------- T _ZN101_$LT$std..ffi..os_str..OsString$u20$as$u20$core..convert..From$LT$collections..string..String$GT$$GT$4from17h5b6e8ea4a4507a33E
-------- T _ZN101_$LT$std..io..cursor..Cursor$LT$$RF$$u27$a$u20$mut$u20$$u5b$u8$u5d$$GT$$u20$as$u20$std..io..Write$GT$5flush17h4852463c3395cc24E

....

-------- s vtable.k
-------- s vtable.l
-------- s vtable.m
         U waitpid
         U write
/usr/local/Cellar/llvm/3.9.1/bin/llvm-nm: /Users/vvakame/.rustup/toolchains/nightly-x86_64-apple-darwin/lib/rustlib/wasm32-unknown-emscripten/lib/libstd-9a66b6a343d52844.rlib(rust.metadata.bin) The end of the file was unexpectedly encountered

#38558 same issue?

[alexcrichton]

Looks like this was fixed by emscripten-core/emscripten@93a082b, so closing.