[INFO] updating cached repository amitkumaar/trpl
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/amitkumaar/trpl
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/amitkumaar/trpl" "work/ex/beta-1.38-1/sources/1.37.0/gh/amitkumaar/trpl"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/amitkumaar/trpl'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/amitkumaar/trpl" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/amitkumaar/trpl"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/amitkumaar/trpl'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 6fe8dab4297f0d664d75a34472a6ef4c234a00f1
[INFO] sha for GitHub repo amitkumaar/trpl: 6fe8dab4297f0d664d75a34472a6ef4c234a00f1
[INFO] validating manifest of amitkumaar/trpl on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of amitkumaar/trpl on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing amitkumaar/trpl
[INFO] finished frobbing amitkumaar/trpl
[INFO] frobbed toml for amitkumaar/trpl written to work/ex/beta-1.38-1/sources/1.37.0/gh/amitkumaar/trpl/Cargo.toml
[INFO] started frobbing amitkumaar/trpl
[INFO] finished frobbing amitkumaar/trpl
[INFO] frobbed toml for amitkumaar/trpl written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/amitkumaar/trpl/Cargo.toml
[INFO] crate amitkumaar/trpl already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing amitkumaar/trpl against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/amitkumaar/trpl:/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=warn" "-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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] c393f64fbbd73d1a7169aaad576252907eb4ec630395807003604373d122e986
[INFO] running `"docker" "start" "-a" "c393f64fbbd73d1a7169aaad576252907eb4ec630395807003604373d122e986"`
[INFO] [stderr]    Compiling trpl v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::sync::Arc`
[INFO] [stderr]  --> src/main.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::sync::Arc;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cell::Cell`
[INFO] [stderr]  --> src/main.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::cell::Cell;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/main.rs:50:6
[INFO] [stderr]    |
[INFO] [stderr] 50 | let (x,_) = tuple;
[INFO] [stderr]    |      ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.68s
[INFO] running `"docker" "inspect" "c393f64fbbd73d1a7169aaad576252907eb4ec630395807003604373d122e986"`
[INFO] running `"docker" "rm" "-f" "c393f64fbbd73d1a7169aaad576252907eb4ec630395807003604373d122e986"`
[INFO] [stdout] c393f64fbbd73d1a7169aaad576252907eb4ec630395807003604373d122e986
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/amitkumaar/trpl:/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=warn" "-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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 4cbc0f2510d54b71d9b37e2cb0809f292527c8ff26210fe421519f9a5a0f9bd3
[INFO] running `"docker" "start" "-a" "4cbc0f2510d54b71d9b37e2cb0809f292527c8ff26210fe421519f9a5a0f9bd3"`
[INFO] [stderr]    Compiling trpl v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::sync::Arc`
[INFO] [stderr]  --> src/main.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::sync::Arc;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cell::Cell`
[INFO] [stderr]  --> src/main.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::cell::Cell;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/main.rs:50:6
[INFO] [stderr]    |
[INFO] [stderr] 50 | let (x,_) = tuple;
[INFO] [stderr]    |      ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.43s
[INFO] running `"docker" "inspect" "4cbc0f2510d54b71d9b37e2cb0809f292527c8ff26210fe421519f9a5a0f9bd3"`
[INFO] running `"docker" "rm" "-f" "4cbc0f2510d54b71d9b37e2cb0809f292527c8ff26210fe421519f9a5a0f9bd3"`
[INFO] [stdout] 4cbc0f2510d54b71d9b37e2cb0809f292527c8ff26210fe421519f9a5a0f9bd3
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/amitkumaar/trpl:/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=warn" "-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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 39300e6e8d038470b4b9466b5b1e566e546f6c987456153f4c43d980ae5ff78f
[INFO] running `"docker" "start" "-a" "39300e6e8d038470b4b9466b5b1e566e546f6c987456153f4c43d980ae5ff78f"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/trpl-63f9908d6c345a0e
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "39300e6e8d038470b4b9466b5b1e566e546f6c987456153f4c43d980ae5ff78f"`
[INFO] running `"docker" "rm" "-f" "39300e6e8d038470b4b9466b5b1e566e546f6c987456153f4c43d980ae5ff78f"`
[INFO] [stdout] 39300e6e8d038470b4b9466b5b1e566e546f6c987456153f4c43d980ae5ff78f