[INFO] fetching crate cargo-call-stack 0.1.5...
[INFO] checking cargo-call-stack-0.1.5 against beta for pr-78714
[INFO] extracting crate cargo-call-stack 0.1.5 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate cargo-call-stack 0.1.5 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cargo-call-stack 0.1.5
[INFO] finished tweaking crates.io crate cargo-call-stack 0.1.5
[INFO] tweaked toml for crates.io crate cargo-call-stack 0.1.5 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate cargo-call-stack 0.1.5 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", 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] a0a1c71dda424a2d4e7be6366fd7954e0e7bf146d4843303e944e4eaeb7751d2
[INFO] running `Command { std: "docker" "start" "-a" "a0a1c71dda424a2d4e7be6366fd7954e0e7bf146d4843303e944e4eaeb7751d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a0a1c71dda424a2d4e7be6366fd7954e0e7bf146d4843303e944e4eaeb7751d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a0a1c71dda424a2d4e7be6366fd7954e0e7bf146d4843303e944e4eaeb7751d2", kill_on_drop: false }`
[INFO] [stdout] a0a1c71dda424a2d4e7be6366fd7954e0e7bf146d4843303e944e4eaeb7751d2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b556e4d93d102304832b623218ea1b7ef34a2fc76902cefc8c59828ea18d87bf
[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" "b556e4d93d102304832b623218ea1b7ef34a2fc76902cefc8c59828ea18d87bf", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.65
[INFO] [stderr]    Compiling proc-macro2 v1.0.6
[INFO] [stderr]    Compiling syn v1.0.8
[INFO] [stderr]    Compiling cc v1.0.47
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling serde v1.0.102
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling ryu v1.0.2
[INFO] [stderr]     Checking unicode-width v0.1.6
[INFO] [stderr]     Checking nodrop v0.1.14
[INFO] [stderr]     Checking static_assertions v0.3.4
[INFO] [stderr]     Checking zero v0.1.2
[INFO] [stderr]     Checking regex-syntax v0.6.12
[INFO] [stderr]     Checking quick-error v1.2.2
[INFO] [stderr]     Checking same-file v1.0.5
[INFO] [stderr]     Checking termcolor v1.0.5
[INFO] [stderr]     Checking leb128 v0.2.4
[INFO] [stderr]    Compiling nom v5.0.1
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking xmas-elf v0.6.2
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]     Checking walkdir v2.2.9
[INFO] [stderr]    Compiling lexical-core v0.4.6
[INFO] [stderr]     Checking aho-corasick v0.7.6
[INFO] [stderr]     Checking ar v0.6.2
[INFO] [stderr]    Compiling backtrace-sys v0.1.32
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]     Checking filetime v0.2.8
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking backtrace v0.3.40
[INFO] [stderr]     Checking regex v1.3.1
[INFO] [stderr]     Checking env_logger v0.6.2
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]     Checking toml v0.4.10
[INFO] [stderr]    Compiling serde_derive v1.0.102
[INFO] [stderr]     Checking failure v0.1.6
[INFO] [stderr]     Checking rustc-cfg v0.4.0
[INFO] [stderr]     Checking cargo-project v0.2.3
[INFO] [stderr]     Checking stack-sizes v0.4.0
[INFO] [stderr]     Checking cargo-call-stack v0.1.5 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 55.93s
[INFO] running `Command { std: "docker" "inspect" "b556e4d93d102304832b623218ea1b7ef34a2fc76902cefc8c59828ea18d87bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b556e4d93d102304832b623218ea1b7ef34a2fc76902cefc8c59828ea18d87bf", kill_on_drop: false }`
[INFO] [stdout] b556e4d93d102304832b623218ea1b7ef34a2fc76902cefc8c59828ea18d87bf