[INFO] fetching crate backtrace 0.3.55...
[INFO] checking backtrace-0.3.55 against master#39b841dfe36f90a7cd111e7f0c55f32594f6e578 for pr-77035
[INFO] extracting crate backtrace 0.3.55 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate backtrace 0.3.55 on toolchain 39b841dfe36f90a7cd111e7f0c55f32594f6e578
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+39b841dfe36f90a7cd111e7f0c55f32594f6e578" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate backtrace 0.3.55
[INFO] removed 0 missing examples
[INFO] removed 1 missing tests
[INFO] finished tweaking crates.io crate backtrace 0.3.55
[INFO] tweaked toml for crates.io crate backtrace 0.3.55 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate crates.io crate backtrace 0.3.55 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+39b841dfe36f90a7cd111e7f0c55f32594f6e578" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+39b841dfe36f90a7cd111e7f0c55f32594f6e578" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 53ae6fdf9e59986a32e87ed83ce4200745b8f1f08ec08c0372f2670092f7c112
[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" "53ae6fdf9e59986a32e87ed83ce4200745b8f1f08ec08c0372f2670092f7c112", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "53ae6fdf9e59986a32e87ed83ce4200745b8f1f08ec08c0372f2670092f7c112", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "53ae6fdf9e59986a32e87ed83ce4200745b8f1f08ec08c0372f2670092f7c112", kill_on_drop: false }`
[INFO] [stdout] 53ae6fdf9e59986a32e87ed83ce4200745b8f1f08ec08c0372f2670092f7c112
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+39b841dfe36f90a7cd111e7f0c55f32594f6e578" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f3db7472ba61f31bc1c31c7f6f645d52cacbbaea2cc01655fbc85b332069a561
[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" "f3db7472ba61f31bc1c31c7f6f645d52cacbbaea2cc01655fbc85b332069a561", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking libloading v0.6.5
[INFO] [stderr]    Compiling miniz_oxide v0.4.3
[INFO] [stderr]     Checking backtrace v0.3.55 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.60s
[INFO] running `Command { std: "docker" "inspect" "f3db7472ba61f31bc1c31c7f6f645d52cacbbaea2cc01655fbc85b332069a561", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f3db7472ba61f31bc1c31c7f6f645d52cacbbaea2cc01655fbc85b332069a561", kill_on_drop: false }`
[INFO] [stdout] f3db7472ba61f31bc1c31c7f6f645d52cacbbaea2cc01655fbc85b332069a561