LLVM ERROR: out of memory when building a project with cargo build --target wasm32-unknown-unknown on nightly

[udoprog]

rustc version: rustc 1.26.0-nightly (e5277c145 2018-03-28)
I have about 32G, most of which is definitely not being used.

I am able to reliably reproduce this on utf8-ranges with:

➜  utf8-ranges git:(master) cargo build --target wasm32-unknown-unknown --verbose
   Compiling utf8-ranges v1.0.0 (file:///home/udoprog/repo/utf8-ranges)
     Running `rustc --crate-name utf8_ranges src/lib.rs --crate-type lib --emit=dep-info,link -C debuginfo=2 -C metadata=90af49223e8dd833 -C extra-filename=-90af49223e8dd833 --out-dir /home/udoprog/repo/utf8-ranges/target/wasm32-unknown-unknown/debug/deps --target wasm32-unknown-unknown -C incremental=/home/udoprog/repo/utf8-ranges/target/wasm32-unknown-unknown/debug/incremental -L dependency=/home/udoprog/repo/utf8-ranges/target/wasm32-unknown-unknown/debug/deps -L dependency=/home/udoprog/repo/utf8-ranges/target/debug/deps`
LLVM ERROR: out of memory
error: Could not compile `utf8-ranges`.

Caused by:
  process didn't exit successfully: `rustc --crate-name utf8_ranges src/lib.rs --crate-type lib --emit=dep-info,link -C debuginfo=2 -C metadata=90af49223e8dd833 -C extra-filename=-90af49223e8dd833 --out-dir /home/udoprog/repo/utf8-ranges/target/wasm32-unknown-unknown/debug/deps --target wasm32-unknown-unknown -C incremental=/home/udoprog/repo/utf8-ranges/target/wasm32-unknown-unknown/debug/incremental -L dependency=/home/udoprog/repo/utf8-ranges/target/wasm32-unknown-unknown/debug/deps -L dependency=/home/udoprog/repo/utf8-ranges/target/debug/deps` (signal: 6, SIGABRT: process abort signal)

[konstin]

I have the same problem when trying to compile log v0.4.1, though only with wasm32-unknown-unknown.

rustc version: rustc 1.27.0-nightly (48fa6f9 2018-04-05)

[jD91mZM2]

I just got the same problem... Except I'm on rustc 1.25...
Although release mode works for me

$ cargo build --target wasm32-unknown-unknown
   Compiling crappy-chess-minimax v0.1.0 (file:///home/jD91mZM2/Coding/Rust/crappy-chess-minimax)
   Compiling crappy-chess-minimax-wasm v0.1.0 (file:///home/jD91mZM2/Coding/Web/jD91mZM2.github.io/crappy-chess-minimax-wasm)
LLVM ERROR: out of memory
error: Could not compile `crappy-chess-minimax-wasm`.

To learn more, run the command again with --verbose.
$ cargo build --target wasm32-unknown-unknown --release
   Compiling crappy-chess-minimax v0.1.0 (file:///home/jD91mZM2/Coding/Rust/crappy-chess-minimax)
   Compiling crappy-chess-minimax-wasm v0.1.0 (file:///home/jD91mZM2/Coding/Web/jD91mZM2.github.io/crappy-chess-minimax-wasm)
    Finished release [optimized] target(s) in 4.66 secs
cargo build --target wasm32-unknown-unknown --release  7.58s user 0.08s system 146% cpu 5.226 total
$ rustc --version
rustc 1.25.0 (84203cac6 2018-03-25)

EDIT: I can reproduce it with this project

[vitiral]

Also experiencing this related to utf8-ranges. Confirm that --release is a workaround

[alexcrichton]

I believe this has since been fixed, so closing