[INFO] crate pylauncher 0.1.1 is already in cache
[INFO] extracting crate pylauncher 0.1.1 into work/ex/beta-1.37-6/sources/1.36.0/reg/pylauncher/0.1.1
[INFO] extracting crate pylauncher 0.1.1 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/pylauncher/0.1.1
[INFO] validating manifest of pylauncher-0.1.1 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 pylauncher-0.1.1 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 pylauncher-0.1.1
[INFO] finished frobbing pylauncher-0.1.1
[INFO] frobbed toml for pylauncher-0.1.1 written to work/ex/beta-1.37-6/sources/1.36.0/reg/pylauncher/0.1.1/Cargo.toml
[INFO] started frobbing pylauncher-0.1.1
[INFO] finished frobbing pylauncher-0.1.1
[INFO] frobbed toml for pylauncher-0.1.1 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/pylauncher/0.1.1/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 pylauncher-0.1.1 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-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/pylauncher/0.1.1:/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] 0493b68ecea916de23162cd7cffa5c13fc08d1761041526a2d2597f224d41c7a
[INFO] running `"docker" "start" "-a" "0493b68ecea916de23162cd7cffa5c13fc08d1761041526a2d2597f224d41c7a"`
[INFO] [stderr]    Compiling dbg v1.0.4
[INFO] [stderr]    Compiling errno v0.2.4
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling exec v0.3.1
[INFO] [stderr]    Compiling pylauncher v0.1.1 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/specs.rs:21:21
[INFO] [stderr]    |
[INFO] [stderr] 21 |                 let mut n = number;
[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 4.14s
[INFO] running `"docker" "inspect" "0493b68ecea916de23162cd7cffa5c13fc08d1761041526a2d2597f224d41c7a"`
[INFO] running `"docker" "rm" "-f" "0493b68ecea916de23162cd7cffa5c13fc08d1761041526a2d2597f224d41c7a"`
[INFO] [stdout] 0493b68ecea916de23162cd7cffa5c13fc08d1761041526a2d2597f224d41c7a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/pylauncher/0.1.1:/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] 41ebda6b0a6fa5816877f4a05204f76b4ed011816a8b85d40c89e878b3543f68
[INFO] running `"docker" "start" "-a" "41ebda6b0a6fa5816877f4a05204f76b4ed011816a8b85d40c89e878b3543f68"`
[INFO] [stderr]    Compiling pylauncher v0.1.1 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/specs.rs:21:21
[INFO] [stderr]    |
[INFO] [stderr] 21 |                 let mut n = number;
[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 0.94s
[INFO] running `"docker" "inspect" "41ebda6b0a6fa5816877f4a05204f76b4ed011816a8b85d40c89e878b3543f68"`
[INFO] running `"docker" "rm" "-f" "41ebda6b0a6fa5816877f4a05204f76b4ed011816a8b85d40c89e878b3543f68"`
[INFO] [stdout] 41ebda6b0a6fa5816877f4a05204f76b4ed011816a8b85d40c89e878b3543f68
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/pylauncher/0.1.1:/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] 3a9bd21999f989c10155f768cf2006677228e718192e1c2a06289c15442875f8
[INFO] running `"docker" "start" "-a" "3a9bd21999f989c10155f768cf2006677228e718192e1c2a06289c15442875f8"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/py-a1a1b812cc79fed9
[INFO] [stdout] 
[INFO] [stdout] running 8 tests
[INFO] [stdout] test specs::tests::test_parse_spec_part_number ... ok
[INFO] [stdout] test specs::tests::test_parse_spec_minor ... ok
[INFO] [stdout] test specs::tests::test_parse_spec_part_number_dot ... ok
[INFO] [stdout] test specs::tests::test_parse_spec_major ... ok
[INFO] [stdout] test specs::tests::test_parse_spec_trailing_dot ... ok
[INFO] [stdout] test specs::tests::test_parse_spec_part_only_dot ... ok
[INFO] [stdout] test specs::tests::test_parse_spec_wrong_dash ... ok
[INFO] [stdout] test specs::tests::test_parse_spec_trailing_garbage ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 8 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "3a9bd21999f989c10155f768cf2006677228e718192e1c2a06289c15442875f8"`
[INFO] running `"docker" "rm" "-f" "3a9bd21999f989c10155f768cf2006677228e718192e1c2a06289c15442875f8"`
[INFO] [stdout] 3a9bd21999f989c10155f768cf2006677228e718192e1c2a06289c15442875f8