[INFO] fetching crate tower 0.4.8...
[INFO] checking tower-0.4.8 against try#a7a572ce3edd6d476191fbfe92c9c1986e009b34 for pr-87190-3
[INFO] extracting crate tower 0.4.8 into /workspace/builds/worker-108/source
[INFO] validating manifest of crates.io crate tower 0.4.8 on toolchain a7a572ce3edd6d476191fbfe92c9c1986e009b34
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tower 0.4.8
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate tower 0.4.8
[INFO] tweaked toml for crates.io crate tower 0.4.8 written to /workspace/builds/worker-108/source/Cargo.toml
[INFO] crate crates.io crate tower 0.4.8 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded hdrhistogram v6.3.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-108/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-108/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" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f886c7c101b00a2e1499c4f41d2614d631c19154d6b0d29c708cf8b0d8420793
[INFO] running `Command { std: "docker" "start" "-a" "f886c7c101b00a2e1499c4f41d2614d631c19154d6b0d29c708cf8b0d8420793", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f886c7c101b00a2e1499c4f41d2614d631c19154d6b0d29c708cf8b0d8420793", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f886c7c101b00a2e1499c4f41d2614d631c19154d6b0d29c708cf8b0d8420793", kill_on_drop: false }`
[INFO] [stdout] f886c7c101b00a2e1499c4f41d2614d631c19154d6b0d29c708cf8b0d8420793
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-108/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-108/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" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 19b23443726a36703976b9512d8a54a244b86c7ed3dbf4a4b08a277197a3ba91
[INFO] running `Command { std: "docker" "start" "-a" "19b23443726a36703976b9512d8a54a244b86c7ed3dbf4a4b08a277197a3ba91", kill_on_drop: false }`
[INFO] [stderr] Copying to /tmp/fixit
[INFO] [stderr] Running `cargo fix --edition`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] note: Switching to Edition 2021 will enable the use of the version 2 feature resolver in Cargo.
[INFO] [stderr] This may cause some dependencies to be built with fewer features enabled than previously.
[INFO] [stderr] More information about the resolver changes may be found at https://doc.rust-lang.org/nightly/edition-guide/rust-2021/default-cargo-resolver.html
[INFO] [stderr] When building the following dependencies, the given features will no longer be used:
[INFO] [stderr] 
[INFO] [stderr]   log v0.4.14: std
[INFO] [stderr]   tracing-core v0.1.18: default
[INFO] [stderr] 
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]    Compiling libc v0.2.95
[INFO] [stderr]    Compiling futures-core v0.3.15
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling futures-task v0.3.15
[INFO] [stderr]    Compiling futures-channel v0.3.15
[INFO] [stderr]     Checking futures-sink v0.3.15
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]     Checking slab v0.4.3
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]    Compiling crc32fast v1.2.1
[INFO] [stderr]     Checking futures-io v0.3.15
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]     Checking tower-layer v0.3.1
[INFO] [stderr]     Checking tower-service v0.3.1
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling futures-macro v0.3.15
[INFO] [stderr]    Compiling futures-util v0.3.15
[INFO] [stderr]    Compiling tokio v1.6.1
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]     Checking tracing-core v0.1.18
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking crossbeam-utils v0.6.6
[INFO] [stderr]     Checking base64 v0.10.1
[INFO] [stderr]     Checking sharded-slab v0.1.1
[INFO] [stderr]     Checking thread_local v1.1.3
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking http v0.2.4
[INFO] [stderr]    Compiling nom v4.2.3
[INFO] [stderr]     Checking crossbeam-channel v0.3.9
[INFO] [stderr]     Checking tracing-log v0.1.2
[INFO] [stderr]     Checking matchers v0.0.1
[INFO] [stderr]     Checking getrandom v0.1.16
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking flate2 v1.0.20
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking hdrhistogram v6.3.4
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking quickcheck v0.9.2
[INFO] [stderr]     Checking tracing-serde v0.1.2
[INFO] [stderr]    Compiling tokio-macros v1.2.0
[INFO] [stderr]    Compiling tracing-attributes v0.1.15
[INFO] [stderr]    Compiling pin-project-internal v1.0.7
[INFO] [stderr]    Compiling async-stream-impl v0.3.2
[INFO] [stderr]     Checking async-stream v0.3.2
[INFO] [stderr]     Checking tokio-stream v0.1.6
[INFO] [stderr]     Checking tracing v0.1.26
[INFO] [stderr]     Checking pin-project v1.0.7
[INFO] [stderr]     Checking tracing-subscriber v0.2.18
[INFO] [stderr]     Checking tower v0.4.8 (/tmp/fixit)
[INFO] [stderr]    Migrating src/lib.rs from 2018 edition to 2021
[INFO] [stderr]     Checking tokio-test v0.4.2
[INFO] [stderr]     Checking futures-executor v0.3.15
[INFO] [stderr]     Checking tower-test v0.4.0
[INFO] [stderr]     Checking futures v0.3.15
[INFO] [stderr]    Migrating tests/hedge/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/buffer/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/load_shed/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/limit/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/ready_cache/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/util/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/balance/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/support.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/spawn_ready/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/retry/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/builder.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/steer/main.rs from 2018 edition to 2021
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 25.76s
[INFO] [stderr] Running `cargo check` to verify 2021
[INFO] [stderr]     Checking tower v0.4.8 (/tmp/fixit)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.87s
[INFO] running `Command { std: "docker" "inspect" "19b23443726a36703976b9512d8a54a244b86c7ed3dbf4a4b08a277197a3ba91", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "19b23443726a36703976b9512d8a54a244b86c7ed3dbf4a4b08a277197a3ba91", kill_on_drop: false }`
[INFO] [stdout] 19b23443726a36703976b9512d8a54a244b86c7ed3dbf4a4b08a277197a3ba91