[INFO] cloning repository https://github.com/kazcw/rustc-bug51796
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kazcw/rustc-bug51796" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkazcw%2Frustc-bug51796", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkazcw%2Frustc-bug51796'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8ecd8ae2eba81eef780d9ea46c0bc54d991e3323
[INFO] checking kazcw/rustc-bug51796 against master#836c31742687ba4e2f857b5b698e1e9e6b67619c for pr-81789
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkazcw%2Frustc-bug51796" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kazcw/rustc-bug51796 on toolchain 836c31742687ba4e2f857b5b698e1e9e6b67619c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kazcw/rustc-bug51796
[INFO] finished tweaking git repo https://github.com/kazcw/rustc-bug51796
[INFO] tweaked toml for git repo https://github.com/kazcw/rustc-bug51796 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/kazcw/rustc-bug51796 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: /workspace/builds/worker-7/source/c/Cargo.toml: the cargo feature `rename-dependency` has been stabilized in the 1.31 release and is no longer necessary to be listed in the manifest
[INFO] [stderr]   See https://doc.rust-lang.org/nightly/cargo/reference/specifying-dependencies.html#renaming-dependencies-in-cargotoml for more information about using this feature.
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ef85db68d91916000df8364c3675fa446fd8a1d92efd310d26f61209443e2b76
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "ef85db68d91916000df8364c3675fa446fd8a1d92efd310d26f61209443e2b76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ef85db68d91916000df8364c3675fa446fd8a1d92efd310d26f61209443e2b76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef85db68d91916000df8364c3675fa446fd8a1d92efd310d26f61209443e2b76", kill_on_drop: false }`
[INFO] [stdout] ef85db68d91916000df8364c3675fa446fd8a1d92efd310d26f61209443e2b76
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 5844c0946ee0695401f3ac1952909cb09df60bf7a8ac8ef19bb85264760c9667
[INFO] running `Command { std: "docker" "start" "-a" "5844c0946ee0695401f3ac1952909cb09df60bf7a8ac8ef19bb85264760c9667", kill_on_drop: false }`
[INFO] [stderr] warning: /opt/rustwide/workdir/c/Cargo.toml: the cargo feature `rename-dependency` has been stabilized in the 1.31 release and is no longer necessary to be listed in the manifest
[INFO] [stderr]   See https://doc.rust-lang.org/nightly/cargo/reference/specifying-dependencies.html#renaming-dependencies-in-cargotoml for more information about using this feature.
[INFO] [stderr]     Checking a v0.1.0 (/opt/rustwide/workdir/a)
[INFO] [stderr]     Checking b v0.1.0 (/opt/rustwide/workdir/b)
[INFO] [stderr]     Checking c v0.1.0 (/opt/rustwide/workdir/c)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.75s
[INFO] running `Command { std: "docker" "inspect" "5844c0946ee0695401f3ac1952909cb09df60bf7a8ac8ef19bb85264760c9667", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5844c0946ee0695401f3ac1952909cb09df60bf7a8ac8ef19bb85264760c9667", kill_on_drop: false }`
[INFO] [stdout] 5844c0946ee0695401f3ac1952909cb09df60bf7a8ac8ef19bb85264760c9667