[INFO] updating cached repository motecshine/hello_world
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/motecshine/hello_world
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/motecshine/hello_world" "work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/motecshine/hello_world"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/motecshine/hello_world'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/motecshine/hello_world" "work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/motecshine/hello_world"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/motecshine/hello_world'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 287eca7f17b361b21acdadabc051f55b80dc578f
[INFO] sha for GitHub repo motecshine/hello_world: 287eca7f17b361b21acdadabc051f55b80dc578f
[INFO] validating manifest of motecshine/hello_world on toolchain master#435236b8877cdb98c82eaebfb7887782277265c5
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of motecshine/hello_world on toolchain try#b5c7f157c20453dde8d47371abe73b32351b4e7f
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing motecshine/hello_world
[INFO] finished frobbing motecshine/hello_world
[INFO] frobbed toml for motecshine/hello_world written to work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/motecshine/hello_world/Cargo.toml
[INFO] started frobbing motecshine/hello_world
[INFO] finished frobbing motecshine/hello_world
[INFO] frobbed toml for motecshine/hello_world written to work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/motecshine/hello_world/Cargo.toml
[INFO] crate motecshine/hello_world already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking motecshine/hello_world against try#b5c7f157c20453dde8d47371abe73b32351b4e7f for pr-62849
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62849/worker-5/try#b5c7f157c20453dde8d47371abe73b32351b4e7f:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/motecshine/hello_world:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 9320ad940f0bc628e62c0b6e0209016e0fcc6ef19f70c155fec4cca769a05112
[INFO] running `"docker" "start" "-a" "9320ad940f0bc628e62c0b6e0209016e0fcc6ef19f70c155fec4cca769a05112"`
[INFO] [stderr]    Compiling syn v0.15.38
[INFO] [stderr]     Checking rand_chacha v0.1.1
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]    Compiling proc-macro-hack v0.5.7
[INFO] [stderr]    Compiling futures-select-macro-preview v0.3.0-alpha.16
[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.16
[INFO] [stderr]     Checking futures-executor-preview v0.3.0-alpha.16
[INFO] [stderr]     Checking futures-preview v0.3.0-alpha.16
[INFO] [stderr]     Checking learnrust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `self`
[INFO] [stderr]  --> src/fut/async_await_macro.rs:3:23
[INFO] [stderr]   |
[INFO] [stderr] 3 | use futures::future::{self, FutureExt};
[INFO] [stderr]   |                       ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Poll`, `try_join`
[INFO] [stderr]  --> src/fut/async_await_macro.rs:6:44
[INFO] [stderr]   |
[INFO] [stderr] 6 | use futures::{join, pending, poll, select, try_join, Poll};
[INFO] [stderr]   |                                            ^^^^^^^^  ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `self`
[INFO] [stderr]  --> src/fut/async_await_macro.rs:3:23
[INFO] [stderr]   |
[INFO] [stderr] 3 | use futures::future::{self, FutureExt};
[INFO] [stderr]   |                       ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Poll`, `try_join`
[INFO] [stderr]  --> src/fut/async_await_macro.rs:6:44
[INFO] [stderr]   |
[INFO] [stderr] 6 | use futures::{join, pending, poll, select, try_join, Poll};
[INFO] [stderr]   |                                            ^^^^^^^^  ^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 33.95s
[INFO] running `"docker" "inspect" "9320ad940f0bc628e62c0b6e0209016e0fcc6ef19f70c155fec4cca769a05112"`
[INFO] running `"docker" "rm" "-f" "9320ad940f0bc628e62c0b6e0209016e0fcc6ef19f70c155fec4cca769a05112"`
[INFO] [stdout] 9320ad940f0bc628e62c0b6e0209016e0fcc6ef19f70c155fec4cca769a05112