[INFO] updating cached repository ithinkthisisarc/PoTsai
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ithinkthisisarc/PoTsai
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ithinkthisisarc/PoTsai" "work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/ithinkthisisarc/PoTsai"`
[INFO] [stderr] Cloning into 'work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/ithinkthisisarc/PoTsai'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ithinkthisisarc/PoTsai" "work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/ithinkthisisarc/PoTsai"`
[INFO] [stderr] Cloning into 'work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/ithinkthisisarc/PoTsai'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] db6d707ff3e2e8bd9d341c07486f555ef11051ab
[INFO] sha for GitHub repo ithinkthisisarc/PoTsai: db6d707ff3e2e8bd9d341c07486f555ef11051ab
[INFO] validating manifest of ithinkthisisarc/PoTsai on toolchain master#452087b4bf18cece2d52d7cd8c9147195e5404bf
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of ithinkthisisarc/PoTsai on toolchain try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing ithinkthisisarc/PoTsai
[INFO] finished frobbing ithinkthisisarc/PoTsai
[INFO] frobbed toml for ithinkthisisarc/PoTsai written to work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/ithinkthisisarc/PoTsai/Cargo.toml
[INFO] started frobbing ithinkthisisarc/PoTsai
[INFO] finished frobbing ithinkthisisarc/PoTsai
[INFO] frobbed toml for ithinkthisisarc/PoTsai written to work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/ithinkthisisarc/PoTsai/Cargo.toml
[INFO] crate ithinkthisisarc/PoTsai already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking ithinkthisisarc/PoTsai against master#452087b4bf18cece2d52d7cd8c9147195e5404bf for pr-63247
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63247/worker-3/master#452087b4bf18cece2d52d7cd8c9147195e5404bf:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/ithinkthisisarc/PoTsai:/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" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] f6f148b1d9e7230d3d18df7d898b849c471b68b9395e48a805275b4a9122a4d6
[INFO] running `"docker" "start" "-a" "f6f148b1d9e7230d3d18df7d898b849c471b68b9395e48a805275b4a9122a4d6"`
[INFO] [stderr]     Checking tokio-service v0.1.0
[INFO] [stderr]     Checking relay v0.1.1
[INFO] [stderr]     Checking want v0.0.4
[INFO] [stderr]     Checking tokio-threadpool v0.1.14
[INFO] [stderr]     Checking tokio-codec v0.1.1
[INFO] [stderr]     Checking tokio-reactor v0.1.9
[INFO] [stderr]     Checking tokio-uds v0.2.5
[INFO] [stderr]     Checking tokio-tcp v0.1.3
[INFO] [stderr]     Checking tokio-udp v0.1.3
[INFO] [stderr]     Checking tokio-fs v0.1.6
[INFO] [stderr]     Checking tokio v0.1.19
[INFO] [stderr]     Checking tokio-core v0.1.17
[INFO] [stderr]     Checking tokio-proto v0.1.1
[INFO] [stderr]     Checking hyper v0.11.27
[INFO] [stderr]     Checking potsai v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `barrier`
[INFO] [stderr]   --> src/main.rs:92:7
[INFO] [stderr]    |
[INFO] [stderr] 92 |   let barrier = Arc::new(Barrier::new(amnt as usize));
[INFO] [stderr]    |       ^^^^^^^ help: consider prefixing with an underscore: `_barrier`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:73:7
[INFO] [stderr]    |
[INFO] [stderr] 73 |   let mut uri: String;
[INFO] [stderr]    |       ----^^^
[INFO] [stderr]    |       |
[INFO] [stderr]    |       help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `barrier`
[INFO] [stderr]   --> src/main.rs:92:7
[INFO] [stderr]    |
[INFO] [stderr] 92 |   let barrier = Arc::new(Barrier::new(amnt as usize));
[INFO] [stderr]    |       ^^^^^^^ help: consider prefixing with an underscore: `_barrier`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:73:7
[INFO] [stderr]    |
[INFO] [stderr] 73 |   let mut uri: String;
[INFO] [stderr]    |       ----^^^
[INFO] [stderr]    |       |
[INFO] [stderr]    |       help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 16.35s
[INFO] running `"docker" "inspect" "f6f148b1d9e7230d3d18df7d898b849c471b68b9395e48a805275b4a9122a4d6"`
[INFO] running `"docker" "rm" "-f" "f6f148b1d9e7230d3d18df7d898b849c471b68b9395e48a805275b4a9122a4d6"`
[INFO] [stdout] f6f148b1d9e7230d3d18df7d898b849c471b68b9395e48a805275b4a9122a4d6