[INFO] fetching crate postoffice 0.0.26...
[INFO] checking postoffice-0.0.26 against try#8de4b308b608cded0ebccf658a0fc719bce87d4e for pr-89056
[INFO] extracting crate postoffice 0.0.26 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate postoffice 0.0.26 on toolchain 8de4b308b608cded0ebccf658a0fc719bce87d4e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate postoffice 0.0.26
[INFO] finished tweaking crates.io crate postoffice 0.0.26
[INFO] tweaked toml for crates.io crate postoffice 0.0.26 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate crates.io crate postoffice 0.0.26 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded universal-hash v0.3.0
[INFO] [stderr]   Downloaded zeroize v1.1.0
[INFO] [stderr]   Downloaded polyval v0.3.3
[INFO] [stderr]   Downloaded pin-project-internal v0.4.23
[INFO] [stderr]   Downloaded aead v0.2.0
[INFO] [stderr]   Downloaded aes-soft v0.3.3
[INFO] [stderr]   Downloaded block-cipher-trait v0.6.2
[INFO] [stderr]   Downloaded aes v0.3.2
[INFO] [stderr]   Downloaded once_cell v1.4.1
[INFO] [stderr]   Downloaded pin-project v0.4.23
[INFO] [stderr]   Downloaded ghash v0.2.3
[INFO] [stderr]   Downloaded generic-array v0.12.3
[INFO] [stderr]   Downloaded sha2 v0.8.1
[INFO] [stderr]   Downloaded subtle v2.2.2
[INFO] [stderr]   Downloaded aesni v0.6.0
[INFO] [stderr]   Downloaded miow v0.3.5
[INFO] [stderr]   Downloaded ntapi v0.3.4
[INFO] [stderr]   Downloaded aes-gcm v0.3.0
[INFO] [stderr]   Downloaded mio v0.7.0
[INFO] [stderr]   Downloaded json v0.12.1
[INFO] [stderr]   Downloaded socket2 v0.3.12
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b70d2a6984ca1bb8b3472d3e7d831d730eaabb685d64acb29d9917e917221a27
[INFO] running `Command { std: "docker" "start" "-a" "b70d2a6984ca1bb8b3472d3e7d831d730eaabb685d64acb29d9917e917221a27", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b70d2a6984ca1bb8b3472d3e7d831d730eaabb685d64acb29d9917e917221a27", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b70d2a6984ca1bb8b3472d3e7d831d730eaabb685d64acb29d9917e917221a27", kill_on_drop: false }`
[INFO] [stdout] b70d2a6984ca1bb8b3472d3e7d831d730eaabb685d64acb29d9917e917221a27
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] eeaef5a24e4bcf105fa13f3ff0f4dd1b405d280aa4bf3fcd8148fdb24ff7159c
[INFO] running `Command { std: "docker" "start" "-a" "eeaef5a24e4bcf105fa13f3ff0f4dd1b405d280aa4bf3fcd8148fdb24ff7159c", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.39
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]     Checking futures-core v0.3.5
[INFO] [stderr]    Compiling proc-macro-hack v0.5.18
[INFO] [stderr]     Checking subtle v2.2.2
[INFO] [stderr]     Checking futures-io v0.3.5
[INFO] [stderr]     Checking zeroize v1.1.0
[INFO] [stderr]     Checking md5 v0.7.0
[INFO] [stderr]     Checking json v0.12.1
[INFO] [stderr]     Checking futures-task v0.3.5
[INFO] [stderr]     Checking c2-chacha v0.2.3
[INFO] [stderr]    Compiling proc-macro2 v1.0.19
[INFO] [stderr]     Checking log v0.4.11
[INFO] [stderr]     Checking generic-array v0.12.3
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking futures-channel v0.3.5
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking block-cipher-trait v0.6.2
[INFO] [stderr]     Checking digest v0.8.1
[INFO] [stderr]     Checking crypto-mac v0.7.0
[INFO] [stderr]     Checking aead v0.2.0
[INFO] [stderr]     Checking universal-hash v0.3.0
[INFO] [stderr]     Checking polyval v0.3.3
[INFO] [stderr]     Checking hmac v0.7.1
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking mio v0.7.0
[INFO] [stderr]     Checking ghash v0.2.3
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking aes-soft v0.3.3
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]     Checking sha2 v0.8.1
[INFO] [stderr]     Checking aes v0.3.2
[INFO] [stderr]     Checking aes-gcm v0.3.0
[INFO] [stderr]    Compiling pin-project-internal v0.4.23
[INFO] [stderr]    Compiling futures-macro v0.3.5
[INFO] [stderr]     Checking pin-project v0.4.23
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking futures-executor v0.3.5
[INFO] [stderr]     Checking futures v0.3.5
[INFO] [stderr]     Checking postoffice v0.0.26 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `close_collector`
[INFO] [stdout]   --> src/main.rs:34:4
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn close_collector(){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `writer_thread`
[INFO] [stdout]   --> src/main.rs:50:4
[INFO] [stdout]    |
[INFO] [stdout] 50 | fn writer_thread(start_from:i32){
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `close_collector`
[INFO] [stdout]   --> src/main.rs:34:4
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn close_collector(){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `writer_thread`
[INFO] [stdout]   --> src/main.rs:50:4
[INFO] [stdout]    |
[INFO] [stdout] 50 | fn writer_thread(start_from:i32){
[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 26.51s
[INFO] running `Command { std: "docker" "inspect" "eeaef5a24e4bcf105fa13f3ff0f4dd1b405d280aa4bf3fcd8148fdb24ff7159c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eeaef5a24e4bcf105fa13f3ff0f4dd1b405d280aa4bf3fcd8148fdb24ff7159c", kill_on_drop: false }`
[INFO] [stdout] eeaef5a24e4bcf105fa13f3ff0f4dd1b405d280aa4bf3fcd8148fdb24ff7159c