[INFO] fetching crate backtrack 0.3.0...
[INFO] checking backtrack-0.3.0 against master#bca37a20bd376ce3fd138e7cdee7fe704e0f8814 for pr-139493-3
[INFO] extracting crate backtrack 0.3.0 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate backtrack 0.3.0
[INFO] finished tweaking crates.io crate backtrack 0.3.0
[INFO] tweaked toml for crates.io crate backtrack 0.3.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate backtrack 0.3.0 on toolchain bca37a20bd376ce3fd138e7cdee7fe704e0f8814
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate backtrack 0.3.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded half v1.7.1
[INFO] [stderr]   Downloaded semver v1.0.3
[INFO] [stderr]   Downloaded criterion v0.3.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e469494fd1fa30f79aa098789e50ed348d9313dab4278dbdac1d78ca271e4c4d
[INFO] running `Command { std: "docker" "start" "-a" "e469494fd1fa30f79aa098789e50ed348d9313dab4278dbdac1d78ca271e4c4d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e469494fd1fa30f79aa098789e50ed348d9313dab4278dbdac1d78ca271e4c4d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e469494fd1fa30f79aa098789e50ed348d9313dab4278dbdac1d78ca271e4c4d", kill_on_drop: false }`
[INFO] [stdout] e469494fd1fa30f79aa098789e50ed348d9313dab4278dbdac1d78ca271e4c4d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "RUSTDOCFLAGS=--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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ad4bc3161379e9b86f7010d22a463c9b6f867a9602066e9248174e16c372fecb
[INFO] running `Command { std: "docker" "start" "-a" "ad4bc3161379e9b86f7010d22a463c9b6f867a9602066e9248174e16c372fecb", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver v1.0.3
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.5
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]     Checking plotters-backend v0.3.2
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking half v1.7.1
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking itertools v0.10.1
[INFO] [stderr]     Checking backtrack v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking serde_cbor v0.11.1
[INFO] [stderr]     Checking serde_json v1.0.64
[INFO] [stderr]     Checking plotters-svg v0.3.1
[INFO] [stderr]     Checking plotters v0.3.1
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]     Checking crossbeam-channel v0.5.1
[INFO] [stderr]     Checking bstr v0.2.16
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]    Compiling cast v0.2.7
[INFO] [stderr]     Checking crossbeam-deque v0.8.0
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking rayon-core v1.9.1
[INFO] [stderr]     Checking csv v1.1.6
[INFO] [stderr]     Checking criterion-plot v0.4.3
[INFO] [stderr]     Checking rayon v1.5.1
[INFO] [stderr]     Checking criterion v0.3.4
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 12.94s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: criterion v0.3.4
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 5`
[INFO] running `Command { std: "docker" "inspect" "ad4bc3161379e9b86f7010d22a463c9b6f867a9602066e9248174e16c372fecb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad4bc3161379e9b86f7010d22a463c9b6f867a9602066e9248174e16c372fecb", kill_on_drop: false }`
[INFO] [stdout] ad4bc3161379e9b86f7010d22a463c9b6f867a9602066e9248174e16c372fecb