[INFO] fetching crate pretty_trace 0.5.12...
[INFO] checking pretty_trace-0.5.12 against try#8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346 for pr-86194
[INFO] extracting crate pretty_trace 0.5.12 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate pretty_trace 0.5.12 on toolchain 8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate pretty_trace 0.5.12
[INFO] finished tweaking crates.io crate pretty_trace 0.5.12
[INFO] tweaked toml for crates.io crate pretty_trace 0.5.12 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate pretty_trace 0.5.12 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "+8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 83bfeecef9a15c42edcf827216d6ad619aac5b5c3980530983bb86de4fe861a1
[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" "83bfeecef9a15c42edcf827216d6ad619aac5b5c3980530983bb86de4fe861a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "83bfeecef9a15c42edcf827216d6ad619aac5b5c3980530983bb86de4fe861a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "83bfeecef9a15c42edcf827216d6ad619aac5b5c3980530983bb86de4fe861a1", kill_on_drop: false }`
[INFO] [stdout] 83bfeecef9a15c42edcf827216d6ad619aac5b5c3980530983bb86de4fe861a1
[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" "+8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e994787f6b5106018eca2ab228ba3fc3162cbd70c031b6a1be82dcf07e4fb794
[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" "e994787f6b5106018eca2ab228ba3fc3162cbd70c031b6a1be82dcf07e4fb794", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.95
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.5
[INFO] [stderr]    Compiling crc32fast v1.2.1
[INFO] [stderr]     Checking uuid v0.8.2
[INFO] [stderr]     Checking superslice v1.0.0
[INFO] [stderr]     Checking permutation v0.2.5
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]     Checking smallvec v1.6.1
[INFO] [stderr]    Compiling symbolic-demangle v8.1.0
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking stats_utils v0.1.2
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling indexmap v1.6.2
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]    Compiling lz4-sys v1.9.2
[INFO] [stderr]     Checking instant v0.1.9
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]    Compiling cpp_demangle v0.3.2
[INFO] [stderr]     Checking itertools v0.10.0
[INFO] [stderr]     Checking lock_api v0.4.4
[INFO] [stderr]    Compiling anyhow v1.0.40
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking vector_utils v0.1.3
[INFO] [stderr]     Checking object v0.25.2
[INFO] [stderr]     Checking debugid v0.7.2
[INFO] [stderr]     Checking string_utils v0.1.2
[INFO] [stderr]     Checking crossbeam-channel v0.5.1
[INFO] [stderr]     Checking crossbeam-deque v0.8.0
[INFO] [stderr]    Compiling petgraph v0.5.1
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking memmap v0.7.0
[INFO] [stderr]     Checking parking_lot_core v0.8.3
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking flate2 v1.0.20
[INFO] [stderr]     Checking nix v0.20.0
[INFO] [stderr]     Checking nix v0.19.1
[INFO] [stderr]    Compiling which v4.1.0
[INFO] [stderr]     Checking symbolic-common v8.1.0
[INFO] [stderr]    Compiling rand_core v0.6.2
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling prost-build v0.7.0
[INFO] [stderr]    Compiling rand_chacha v0.3.0
[INFO] [stderr]     Checking rand v0.8.3
[INFO] [stderr]     Checking backtrace v0.3.60
[INFO] [stderr]     Checking tempfile v3.2.0
[INFO] [stderr]    Compiling prost-derive v0.7.0
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]    Compiling thiserror-impl v1.0.25
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking thiserror v1.0.25
[INFO] [stderr]    Compiling prost v0.7.0
[INFO] [stderr]    Compiling prost-types v0.7.0
[INFO] [stderr]     Checking serde v1.0.126
[INFO] [stderr]    Compiling pprof v0.4.3
[INFO] [stderr]     Checking lz4 v1.23.2
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking io_utils v0.2.10
[INFO] [stderr]     Checking tables v0.1.3
[INFO] [stderr]     Checking pretty_trace v0.5.12 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `whitelist`
[INFO] [stdout]    --> src/lib.rs:588:5
[INFO] [stdout]     |
[INFO] [stdout] 588 |     pub whitelist: Vec<String>, // tracebacks are grepped for these
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `hcount`
[INFO] [stdout]    --> src/lib.rs:589:5
[INFO] [stdout]     |
[INFO] [stdout] 589 |     pub hcount: usize,          // number of tracebacks to gather
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `whitelist`
[INFO] [stdout]    --> src/lib.rs:588:5
[INFO] [stdout]     |
[INFO] [stdout] 588 |     pub whitelist: Vec<String>, // tracebacks are grepped for these
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `hcount`
[INFO] [stdout]    --> src/lib.rs:589:5
[INFO] [stdout]     |
[INFO] [stdout] 589 |     pub hcount: usize,          // number of tracebacks to gather
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 46.76s
[INFO] running `Command { std: "docker" "inspect" "e994787f6b5106018eca2ab228ba3fc3162cbd70c031b6a1be82dcf07e4fb794", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e994787f6b5106018eca2ab228ba3fc3162cbd70c031b6a1be82dcf07e4fb794", kill_on_drop: false }`
[INFO] [stdout] e994787f6b5106018eca2ab228ba3fc3162cbd70c031b6a1be82dcf07e4fb794