[INFO] fetching crate pretty_trace 0.5.15...
[INFO] checking pretty_trace-0.5.15 against master#dfd7b8d03fb93d0e03147d28b3be6d93260fa94d for pr-87050
[INFO] extracting crate pretty_trace 0.5.15 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate pretty_trace 0.5.15 on toolchain dfd7b8d03fb93d0e03147d28b3be6d93260fa94d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate pretty_trace 0.5.15
[INFO] finished tweaking crates.io crate pretty_trace 0.5.15
[INFO] tweaked toml for crates.io crate pretty_trace 0.5.15 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate crates.io crate pretty_trace 0.5.15 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 620e6e5bb8423896ae2220dba596bde5626f4a5a6b8a7fc516640f4e57fea842
[INFO] running `Command { std: "docker" "start" "-a" "620e6e5bb8423896ae2220dba596bde5626f4a5a6b8a7fc516640f4e57fea842", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "620e6e5bb8423896ae2220dba596bde5626f4a5a6b8a7fc516640f4e57fea842", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "620e6e5bb8423896ae2220dba596bde5626f4a5a6b8a7fc516640f4e57fea842", kill_on_drop: false }`
[INFO] [stdout] 620e6e5bb8423896ae2220dba596bde5626f4a5a6b8a7fc516640f4e57fea842
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f3e4264ca6d8bf6c86e3bd312bd1b6696b564cf349ec2da8a37bbd46007ec982
[INFO] running `Command { std: "docker" "start" "-a" "f3e4264ca6d8bf6c86e3bd312bd1b6696b564cf349ec2da8a37bbd46007ec982", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling hashbrown v0.11.2
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling bytes v1.0.1
[INFO] [stderr]    Compiling fixedbitset v0.2.0
[INFO] [stderr]    Compiling multimap v0.8.3
[INFO] [stderr]     Checking permutation v0.2.5
[INFO] [stderr]     Checking superslice v1.0.0
[INFO] [stderr]    Compiling cpp_demangle v0.3.3
[INFO] [stderr]    Compiling symbolic-demangle v8.3.0
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]     Checking stats_utils v0.1.2
[INFO] [stderr]    Compiling lz4-sys v1.9.2
[INFO] [stderr]    Compiling backtrace v0.3.60
[INFO] [stderr]     Checking instant v0.1.9
[INFO] [stderr]     Checking debugid v0.7.2
[INFO] [stderr]     Checking lock_api v0.4.4
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]     Checking crc32fast v1.2.1
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking memmap v0.7.0
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking nix v0.20.0
[INFO] [stderr]     Checking nix v0.21.0
[INFO] [stderr]    Compiling itertools v0.9.0
[INFO] [stderr]     Checking parking_lot_core v0.8.3
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking vector_utils v0.1.3
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[INFO] [stderr]     Checking flate2 v1.0.20
[INFO] [stderr]     Checking rayon-core v1.9.1
[INFO] [stderr]     Checking symbolic-common v8.3.0
[INFO] [stderr]     Checking string_utils v0.1.2
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]     Checking rayon v1.5.1
[INFO] [stderr]    Compiling petgraph v0.5.1
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking object v0.25.3
[INFO] [stderr]     Checking tempfile v3.2.0
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]    Compiling which v4.1.0
[INFO] [stderr]    Compiling prost-build v0.7.0
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling prost-derive v0.7.0
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]    Compiling thiserror-impl v1.0.26
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking thiserror v1.0.26
[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 v0.5.15 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `whitelist`
[INFO] [stdout]    --> src/lib.rs:599:5
[INFO] [stdout]     |
[INFO] [stdout] 599 |     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:600:5
[INFO] [stdout]     |
[INFO] [stdout] 600 |     pub hcount: usize,          // number of tracebacks to gather
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `whitelist`
[INFO] [stdout]    --> src/lib.rs:599:5
[INFO] [stdout]     |
[INFO] [stdout] 599 |     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:600:5
[INFO] [stdout]     |
[INFO] [stdout] 600 |     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: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 37.56s
[INFO] running `Command { std: "docker" "inspect" "f3e4264ca6d8bf6c86e3bd312bd1b6696b564cf349ec2da8a37bbd46007ec982", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f3e4264ca6d8bf6c86e3bd312bd1b6696b564cf349ec2da8a37bbd46007ec982", kill_on_drop: false }`
[INFO] [stdout] f3e4264ca6d8bf6c86e3bd312bd1b6696b564cf349ec2da8a37bbd46007ec982