[INFO] fetching crate send_slack 0.1.0...
[INFO] testing send_slack-0.1.0 against try#b83b707f97d809763b7861afa7638871f3339a33 for pr-145838-1
[INFO] extracting crate send_slack 0.1.0 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate send_slack 0.1.0
[INFO] finished tweaking crates.io crate send_slack 0.1.0
[INFO] tweaked toml for crates.io crate send_slack 0.1.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate send_slack 0.1.0 on toolchain b83b707f97d809763b7861afa7638871f3339a33
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "generate-lockfile" "--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]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 1 package to latest compatible version
[INFO] [stderr]       Adding urlencoding v1.3.3 (available: v2.1.3)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3841340221d22d538113e78c6090664697646727433fe6e0c4011ffa1f6133a1
[INFO] running `Command { std: "docker" "start" "-a" "3841340221d22d538113e78c6090664697646727433fe6e0c4011ffa1f6133a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3841340221d22d538113e78c6090664697646727433fe6e0c4011ffa1f6133a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3841340221d22d538113e78c6090664697646727433fe6e0c4011ffa1f6133a1", kill_on_drop: false }`
[INFO] [stdout] 3841340221d22d538113e78c6090664697646727433fe6e0c4011ffa1f6133a1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c4ec1ca9a73fa4d76defc72b89b05c6753e4c9903ec06632103010a1c1d19a9c
[INFO] running `Command { std: "docker" "start" "-a" "c4ec1ca9a73fa4d76defc72b89b05c6753e4c9903ec06632103010a1c1d19a9c", kill_on_drop: false }`
[INFO] [stderr]    Compiling urlencoding v1.3.3
[INFO] [stderr]    Compiling send_slack v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0433]: failed to resolve: could not find `windows` in `os`
[INFO] [stdout]  --> src/lib.rs:2:14
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::os::windows::process::CommandExt;
[INFO] [stdout]   |              ^^^^^^^ could not find `windows` in `os`
[INFO] [stdout]   |
[INFO] [stdout] note: found an item that was configured out
[INFO] [stdout]  --> /rustc/b83b707f97d809763b7861afa7638871f3339a33/library/std/src/os/mod.rs:56:5
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item is gated here
[INFO] [stdout] note: found an item that was configured out
[INFO] [stdout]  --> /rustc/b83b707f97d809763b7861afa7638871f3339a33/library/std/src/os/mod.rs:120:10
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item is gated here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `creation_flags` found for struct `Command` in the current scope
[INFO] [stdout]   --> src/lib.rs:11:54
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let _res = std::process::Command::new("cmd.exe").creation_flags(CREATE_NO_WINDOW).args(&["/C", &cmd]).output().expect("failed to exec...
[INFO] [stdout]    |                                                      ^^^^^^^^^^^^^^ method not found in `Command`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0433, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0433`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `send_slack` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "c4ec1ca9a73fa4d76defc72b89b05c6753e4c9903ec06632103010a1c1d19a9c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c4ec1ca9a73fa4d76defc72b89b05c6753e4c9903ec06632103010a1c1d19a9c", kill_on_drop: false }`
[INFO] [stdout] c4ec1ca9a73fa4d76defc72b89b05c6753e4c9903ec06632103010a1c1d19a9c