[INFO] updating cached repository sejr/core-interpreter
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/sejr/core-interpreter
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/sejr/core-interpreter" "work/ex/beta-1.37-6/sources/1.36.0/gh/sejr/core-interpreter"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/sejr/core-interpreter'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/sejr/core-interpreter" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/sejr/core-interpreter"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/sejr/core-interpreter'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 64c00c6dba34face0a27e389ac2cd2e2b4bc4976
[INFO] sha for GitHub repo sejr/core-interpreter: 64c00c6dba34face0a27e389ac2cd2e2b4bc4976
[INFO] validating manifest of sejr/core-interpreter on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of sejr/core-interpreter on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing sejr/core-interpreter
[INFO] finished frobbing sejr/core-interpreter
[INFO] frobbed toml for sejr/core-interpreter written to work/ex/beta-1.37-6/sources/1.36.0/gh/sejr/core-interpreter/Cargo.toml
[INFO] started frobbing sejr/core-interpreter
[INFO] finished frobbing sejr/core-interpreter
[INFO] frobbed toml for sejr/core-interpreter written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/sejr/core-interpreter/Cargo.toml
[INFO] crate sejr/core-interpreter already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing sejr/core-interpreter against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/sejr/core-interpreter:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 33557e6e4e41f97141c37aec32e99ede3186a42938b65233ffa45de324423845
[INFO] running `"docker" "start" "-a" "33557e6e4e41f97141c37aec32e99ede3186a42938b65233ffa45de324423845"`
[INFO] [stderr]    Compiling core v0.4.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused arithmetic operation that must be used
[INFO] [stderr]    --> src/tokenizer.rs:309:9
[INFO] [stderr]     |
[INFO] [stderr] 309 |         i + 1;
[INFO] [stderr]     |         ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.42s
[INFO] running `"docker" "inspect" "33557e6e4e41f97141c37aec32e99ede3186a42938b65233ffa45de324423845"`
[INFO] running `"docker" "rm" "-f" "33557e6e4e41f97141c37aec32e99ede3186a42938b65233ffa45de324423845"`
[INFO] [stdout] 33557e6e4e41f97141c37aec32e99ede3186a42938b65233ffa45de324423845
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/sejr/core-interpreter:/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] a2dfceb83070e47998d53d1c6f05305d0131a2be5f3b8be0050e1a4255706eaf
[INFO] running `"docker" "start" "-a" "a2dfceb83070e47998d53d1c6f05305d0131a2be5f3b8be0050e1a4255706eaf"`
[INFO] [stderr]    Compiling core v0.4.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused arithmetic operation that must be used
[INFO] [stderr]    --> src/tokenizer.rs:309:9
[INFO] [stderr]     |
[INFO] [stderr] 309 |         i + 1;
[INFO] [stderr]     |         ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.32s
[INFO] running `"docker" "inspect" "a2dfceb83070e47998d53d1c6f05305d0131a2be5f3b8be0050e1a4255706eaf"`
[INFO] running `"docker" "rm" "-f" "a2dfceb83070e47998d53d1c6f05305d0131a2be5f3b8be0050e1a4255706eaf"`
[INFO] [stdout] a2dfceb83070e47998d53d1c6f05305d0131a2be5f3b8be0050e1a4255706eaf
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/sejr/core-interpreter:/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] 753c234a8db88d57edbc9b987ea86acc47c6159a820d88e18ee51cd20b7bf4d7
[INFO] running `"docker" "start" "-a" "753c234a8db88d57edbc9b987ea86acc47c6159a820d88e18ee51cd20b7bf4d7"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/core-9656d47b97bec84a
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tokenizer::test::correctly_verifies_argument_count ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "753c234a8db88d57edbc9b987ea86acc47c6159a820d88e18ee51cd20b7bf4d7"`
[INFO] running `"docker" "rm" "-f" "753c234a8db88d57edbc9b987ea86acc47c6159a820d88e18ee51cd20b7bf4d7"`
[INFO] [stdout] 753c234a8db88d57edbc9b987ea86acc47c6159a820d88e18ee51cd20b7bf4d7