[INFO] updating cached repository alexcrichton/l4c
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/alexcrichton/l4c
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/alexcrichton/l4c" "work/ex/beta-1.37-6/sources/1.36.0/gh/alexcrichton/l4c"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/alexcrichton/l4c'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/alexcrichton/l4c" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/alexcrichton/l4c"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/alexcrichton/l4c'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e64e1719de50462c82b5175ec9053346ad80c9f4
[INFO] sha for GitHub repo alexcrichton/l4c: e64e1719de50462c82b5175ec9053346ad80c9f4
[INFO] validating manifest of alexcrichton/l4c 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 alexcrichton/l4c 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 alexcrichton/l4c
[INFO] removed workspace from alexcrichton/l4c
[INFO] finished frobbing alexcrichton/l4c
[INFO] frobbed toml for alexcrichton/l4c written to work/ex/beta-1.37-6/sources/1.36.0/gh/alexcrichton/l4c/Cargo.toml
[INFO] started frobbing alexcrichton/l4c
[INFO] removed workspace from alexcrichton/l4c
[INFO] finished frobbing alexcrichton/l4c
[INFO] frobbed toml for alexcrichton/l4c written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/alexcrichton/l4c/Cargo.toml
[INFO] crate alexcrichton/l4c 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] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/alexcrichton/l4c/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 alexcrichton/l4c 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/gh/alexcrichton/l4c:/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] adf127da66640fb0f574818cc22bb9cbebc41fce7299c48be888254f3c197c71
[INFO] running `"docker" "start" "-a" "adf127da66640fb0f574818cc22bb9cbebc41fce7299c48be888254f3c197c71"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling bit-vec v0.5.1
[INFO] [stderr]    Compiling env_logger v0.5.13
[INFO] [stderr]    Compiling l4c v0.0.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `Display`
[INFO] [stderr]  --> src/front/pp.rs:1:16
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::fmt::{Display, Write};
[INFO] [stderr]   |                ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 22.27s
[INFO] running `"docker" "inspect" "adf127da66640fb0f574818cc22bb9cbebc41fce7299c48be888254f3c197c71"`
[INFO] running `"docker" "rm" "-f" "adf127da66640fb0f574818cc22bb9cbebc41fce7299c48be888254f3c197c71"`
[INFO] [stdout] adf127da66640fb0f574818cc22bb9cbebc41fce7299c48be888254f3c197c71
[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/gh/alexcrichton/l4c:/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] 48fbf840d54b9057f7936cd6ddeb85e97e1d12b3a0e969e88975136c4a899ce7
[INFO] running `"docker" "start" "-a" "48fbf840d54b9057f7936cd6ddeb85e97e1d12b3a0e969e88975136c4a899ce7"`
[INFO] [stderr]    Compiling l4c v0.0.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `Display`
[INFO] [stderr]  --> src/front/pp.rs:1:16
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::fmt::{Display, Write};
[INFO] [stderr]   |                ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.42s
[INFO] running `"docker" "inspect" "48fbf840d54b9057f7936cd6ddeb85e97e1d12b3a0e969e88975136c4a899ce7"`
[INFO] running `"docker" "rm" "-f" "48fbf840d54b9057f7936cd6ddeb85e97e1d12b3a0e969e88975136c4a899ce7"`
[INFO] [stdout] 48fbf840d54b9057f7936cd6ddeb85e97e1d12b3a0e969e88975136c4a899ce7
[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/gh/alexcrichton/l4c:/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] 522802a305c2543e7a5bef7920e584db8205cd4caafe08850912eb57f6ff2fc6
[INFO] running `"docker" "start" "-a" "522802a305c2543e7a5bef7920e584db8205cd4caafe08850912eb57f6ff2fc6"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/l4c-c4fef5da2a12fb61
[INFO] [stdout] 
[INFO] [stdout] running 9 tests
[INFO] [stdout] test back::arch::test_stack_alignment ... ok
[INFO] [stdout] test back::spill::tests::test_sort_works1 ... ok
[INFO] [stdout] test back::spill::tests::test_sort_works2 ... ok
[INFO] [stdout] test back::alloc::tests::test_resolve ... ok
[INFO] [stdout] test middle::opt::arith::test_log2 ... ok
[INFO] [stdout] test utils::graph::test_basic ... ok
[INFO] [stdout] test middle::opt::arith::test_pow2 ... ok
[INFO] [stdout] test utils::graph::test_same_id_fail ... ok
[INFO] [stdout] test utils::graph::test_random_id_fail ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 9 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "522802a305c2543e7a5bef7920e584db8205cd4caafe08850912eb57f6ff2fc6"`
[INFO] running `"docker" "rm" "-f" "522802a305c2543e7a5bef7920e584db8205cd4caafe08850912eb57f6ff2fc6"`
[INFO] [stdout] 522802a305c2543e7a5bef7920e584db8205cd4caafe08850912eb57f6ff2fc6