[INFO] updating cached repository akritrime/lambda_compiler
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/akritrime/lambda_compiler
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/akritrime/lambda_compiler" "work/ex/beta-1.38-1/sources/1.37.0/gh/akritrime/lambda_compiler"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/akritrime/lambda_compiler'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/akritrime/lambda_compiler" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/akritrime/lambda_compiler"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/akritrime/lambda_compiler'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 514f872e4f9896f225ef9df3e00649850d4d2a02
[INFO] sha for GitHub repo akritrime/lambda_compiler: 514f872e4f9896f225ef9df3e00649850d4d2a02
[INFO] validating manifest of akritrime/lambda_compiler 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 akritrime/lambda_compiler 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 akritrime/lambda_compiler
[INFO] finished frobbing akritrime/lambda_compiler
[INFO] frobbed toml for akritrime/lambda_compiler written to work/ex/beta-1.38-1/sources/1.37.0/gh/akritrime/lambda_compiler/Cargo.toml
[INFO] started frobbing akritrime/lambda_compiler
[INFO] finished frobbing akritrime/lambda_compiler
[INFO] frobbed toml for akritrime/lambda_compiler written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/akritrime/lambda_compiler/Cargo.toml
[INFO] crate akritrime/lambda_compiler 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 akritrime/lambda_compiler 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-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/akritrime/lambda_compiler:/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] a71d945870a8195c814593db3d85d1d02ccf709b71318afef8a78f3ace9f8aea
[INFO] running `"docker" "start" "-a" "a71d945870a8195c814593db3d85d1d02ccf709b71318afef8a78f3ace9f8aea"`
[INFO] [stderr]    Compiling lambda_compiler v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:154:21
[INFO] [stderr]     |
[INFO] [stderr] 154 |                 let mut name = match tokens.next() {
[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 1.03s
[INFO] running `"docker" "inspect" "a71d945870a8195c814593db3d85d1d02ccf709b71318afef8a78f3ace9f8aea"`
[INFO] running `"docker" "rm" "-f" "a71d945870a8195c814593db3d85d1d02ccf709b71318afef8a78f3ace9f8aea"`
[INFO] [stdout] a71d945870a8195c814593db3d85d1d02ccf709b71318afef8a78f3ace9f8aea
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/akritrime/lambda_compiler:/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] e4caed03df6a326977ccefcd804cbed3908aefdaac1154b2e2d0d0b440e16360
[INFO] running `"docker" "start" "-a" "e4caed03df6a326977ccefcd804cbed3908aefdaac1154b2e2d0d0b440e16360"`
[INFO] [stderr]    Compiling lambda_compiler v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:154:21
[INFO] [stderr]     |
[INFO] [stderr] 154 |                 let mut name = match tokens.next() {
[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 0.79s
[INFO] running `"docker" "inspect" "e4caed03df6a326977ccefcd804cbed3908aefdaac1154b2e2d0d0b440e16360"`
[INFO] running `"docker" "rm" "-f" "e4caed03df6a326977ccefcd804cbed3908aefdaac1154b2e2d0d0b440e16360"`
[INFO] [stdout] e4caed03df6a326977ccefcd804cbed3908aefdaac1154b2e2d0d0b440e16360
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/akritrime/lambda_compiler:/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] 10bd2adce6c97253d4ab4a0a970f7fd1d6c7f3f1d6f1a98ac0e27a369247d6ea
[INFO] running `"docker" "start" "-a" "10bd2adce6c97253d4ab4a0a970f7fd1d6c7f3f1d6f1a98ac0e27a369247d6ea"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/lambda_compiler-99a39ee8cfa30030
[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" "10bd2adce6c97253d4ab4a0a970f7fd1d6c7f3f1d6f1a98ac0e27a369247d6ea"`
[INFO] running `"docker" "rm" "-f" "10bd2adce6c97253d4ab4a0a970f7fd1d6c7f3f1d6f1a98ac0e27a369247d6ea"`
[INFO] [stdout] 10bd2adce6c97253d4ab4a0a970f7fd1d6c7f3f1d6f1a98ac0e27a369247d6ea