[INFO] fetching crate servlin 0.4.3...
[INFO] checking servlin-0.4.3 against master#f167efad2f51088d86180ee89177b3d7c9e7c2f5 for pr-129543
[INFO] extracting crate servlin 0.4.3 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate servlin 0.4.3 on toolchain f167efad2f51088d86180ee89177b3d7c9e7c2f5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate servlin 0.4.3
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate servlin 0.4.3
[INFO] tweaked toml for crates.io crate servlin 0.4.3 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate servlin 0.4.3 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" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded temp-file v0.1.7
[INFO] [stderr]   Downloaded safina-threadpool v0.2.4
[INFO] [stderr]   Downloaded safina-sync v0.2.4
[INFO] [stderr]   Downloaded safe-regex-macro v0.2.5
[INFO] [stderr]   Downloaded safe-regex v0.2.5
[INFO] [stderr]   Downloaded safina-timer v0.1.11
[INFO] [stderr]   Downloaded safina-executor v0.3.3
[INFO] [stderr]   Downloaded temp-dir v0.1.11
[INFO] [stderr]   Downloaded include_dir v0.7.3
[INFO] [stderr]   Downloaded async-channel v2.1.1
[INFO] [stderr]   Downloaded event-listener v4.0.0
[INFO] [stderr]   Downloaded futures-lite v2.1.0
[INFO] [stderr]   Downloaded safe-regex-compiler v0.2.5
[INFO] [stderr]   Downloaded async-lock v3.2.0
[INFO] [stderr]   Downloaded async-task v4.5.0
[INFO] [stderr]   Downloaded blocking v1.5.1
[INFO] [stderr]   Downloaded fixed-buffer v0.5.0
[INFO] [stderr]   Downloaded safe-quote v1.0.15
[INFO] [stderr]   Downloaded crossbeam-utils v0.8.17
[INFO] [stderr]   Downloaded include_dir_macros v0.7.3
[INFO] [stderr]   Downloaded permit v0.2.1
[INFO] [stderr]   Downloaded safe-proc-macro2 v1.0.67
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 979d4076bdbd87767900830e4d0af8686d8e5a88d088c06f2067161827e82e74
[INFO] running `Command { std: "docker" "start" "-a" "979d4076bdbd87767900830e4d0af8686d8e5a88d088c06f2067161827e82e74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "979d4076bdbd87767900830e4d0af8686d8e5a88d088c06f2067161827e82e74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "979d4076bdbd87767900830e4d0af8686d8e5a88d088c06f2067161827e82e74", kill_on_drop: false }`
[INFO] [stdout] 979d4076bdbd87767900830e4d0af8686d8e5a88d088c06f2067161827e82e74
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f4c047d717fe6c2576cba064efc777e42570a6abef9131bcd23d228c34095907
[INFO] running `Command { std: "docker" "start" "-a" "f4c047d717fe6c2576cba064efc777e42570a6abef9131bcd23d228c34095907", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.8.17
[INFO] [stderr]    Compiling futures-core v0.3.29
[INFO] [stderr]     Checking futures-io v0.3.29
[INFO] [stderr]    Compiling safe-proc-macro2 v1.0.67
[INFO] [stderr]    Compiling polling v2.8.0
[INFO] [stderr]     Checking waker-fn v1.1.1
[INFO] [stderr]     Checking tracing v0.1.40
[INFO] [stderr]     Checking io-lifetimes v1.0.11
[INFO] [stderr]     Checking getrandom v0.2.11
[INFO] [stderr]    Compiling async-io v1.13.0
[INFO] [stderr]     Checking piper v0.2.1
[INFO] [stderr]     Checking log v0.4.20
[INFO] [stderr]     Checking async-task v4.5.0
[INFO] [stderr]     Checking rustix v0.37.27
[INFO] [stderr]     Checking futures-lite v2.1.0
[INFO] [stderr]     Checking futures-lite v1.13.0
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]    Compiling async-fs v1.6.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]     Checking safina-threadpool v0.2.4
[INFO] [stderr]     Checking concurrent-queue v2.4.0
[INFO] [stderr]     Checking safina-sync v0.2.4
[INFO] [stderr]     Checking safina-timer v0.1.11
[INFO] [stderr]     Checking fixed-buffer v0.5.0
[INFO] [stderr]    Compiling safe-quote v1.0.15
[INFO] [stderr]     Checking safina-executor v0.3.3
[INFO] [stderr]     Checking event-listener v4.0.0
[INFO] [stderr]     Checking permit v0.2.1
[INFO] [stderr]     Checking temp-file v0.1.7
[INFO] [stderr]     Checking temp-dir v0.1.11
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking event-listener-strategy v0.4.0
[INFO] [stderr]    Compiling safe-regex-compiler v0.2.5
[INFO] [stderr]     Checking async-lock v3.2.0
[INFO] [stderr]     Checking async-channel v2.1.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]    Compiling safe-regex-macro v0.2.5
[INFO] [stderr]     Checking blocking v1.5.1
[INFO] [stderr]     Checking safe-regex v0.2.5
[INFO] [stderr]     Checking async-net v1.8.0
[INFO] [stderr]     Checking servlin v0.4.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/log/log_file_writer.rs:137:26
[INFO] [stdout]     |
[INFO] [stdout] 137 | pub struct LogFileWriter(Sender<LogEvent>);
[INFO] [stdout]     |            ------------- ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |            |
[INFO] [stdout]     |            field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider removing this field
[INFO] [stdout]     = note: `LogFileWriter` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/log/log_file_writer.rs:137:26
[INFO] [stdout]     |
[INFO] [stdout] 137 | pub struct LogFileWriter(Sender<LogEvent>);
[INFO] [stdout]     |            ------------- ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |            |
[INFO] [stdout]     |            field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider removing this field
[INFO] [stdout]     = note: `LogFileWriter` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 14.91s
[INFO] running `Command { std: "docker" "inspect" "f4c047d717fe6c2576cba064efc777e42570a6abef9131bcd23d228c34095907", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f4c047d717fe6c2576cba064efc777e42570a6abef9131bcd23d228c34095907", kill_on_drop: false }`
[INFO] [stdout] f4c047d717fe6c2576cba064efc777e42570a6abef9131bcd23d228c34095907