rustc hangs where there are lots of compilation warnings

[boblehest]

I tried to compile this and it causes rustc to freeze both on stable and nightly on my computer. Playground handles it without any issues.

Using strace shows that it's blocking on write(). Full strace output here.

Meta

Stable:

rustc 1.17.0 (56124baa9 2017-04-24)
binary: rustc
commit-hash: 56124baa9e73f28c0709e59e74783cf234a978cf
commit-date: 2017-04-24
host: x86_64-unknown-linux-gnu
release: 1.17.0
LLVM version: 3.9

Nightly:

rustc 1.19.0-nightly (e40beb3af 2017-05-11)
binary: rustc
commit-hash: e40beb3af162e676e40704854dd6547ee8d4cf60
commit-date: 2017-05-11
host: x86_64-unknown-linux-gnu
release: 1.19.0-nightly
LLVM version: 4.0

[boblehest]

I compiled this from source (same revision as the nightly I'm running), and it does not exhibit the same behavior (the test file compiles successfully.) The versions I used in the comment above were installed by rustup.

rustc 1.19.0-dev (e40beb3af 2017-05-11)
binary: rustc
commit-hash: e40beb3af162e676e40704854dd6547ee8d4cf60
commit-date: 2017-05-11
host: x86_64-unknown-linux-gnu
release: 1.19.0-dev
LLVM version: 4.0

[TimNN]

Which rustup --version were you using?

This reminds me of a rustup bug quite some time ago which occurred when telemetry was enabled.

[boblehest]

rustup 0.3.0 (7d7fed2 2016-07-14)

Interesting. The rustup package itself says version 1.2.0-6. rustup self update just gives me an error. I'll try to figure out how to fix it then, thanks. :)

Edit: Updating rustup fixed the issue. You were correct, here's the old issue: rust-lang/rustup/issues/639