[INFO] fetching crate ncomm 0.3.0...
[INFO] checking ncomm-0.3.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate ncomm 0.3.0 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate ncomm 0.3.0 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ncomm 0.3.0
[INFO] finished tweaking crates.io crate ncomm 0.3.0
[INFO] tweaked toml for crates.io crate ncomm 0.3.0 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 30 packages
[INFO] [stderr]       Adding cfg_aliases v0.1.1 (latest: v0.2.0)
[INFO] [stderr]       Adding radium v0.7.0 (latest: v1.1.0)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding wyz v0.5.1 (latest: v0.6.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ctrlc v3.4.4
[INFO] [stderr]   Downloaded packed_struct v0.10.1
[INFO] [stderr]   Downloaded packed_struct_codegen v0.10.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3959c51db76eda20d30dcc37a2b53d94a407e8d63062582b15415110e7a31252
[INFO] running `Command { std: "docker" "start" "-a" "3959c51db76eda20d30dcc37a2b53d94a407e8d63062582b15415110e7a31252", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3959c51db76eda20d30dcc37a2b53d94a407e8d63062582b15415110e7a31252", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3959c51db76eda20d30dcc37a2b53d94a407e8d63062582b15415110e7a31252", kill_on_drop: false }`
[INFO] [stdout] 3959c51db76eda20d30dcc37a2b53d94a407e8d63062582b15415110e7a31252
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e28681f3d8beb37da4b9416238617d0a8beff965e9156b47ce8af40a14c20f7e
[INFO] running `Command { std: "docker" "start" "-a" "e28681f3d8beb37da4b9416238617d0a8beff965e9156b47ce8af40a14c20f7e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling nix v0.28.0
[INFO] [stderr]     Checking ctrlc v3.4.4
[INFO] [stderr]     Checking ncomm v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Ord` is imported redundantly
[INFO] [stdout]  --> src/executor/node_wrapper.rs:8:16
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::cmp::{Ord, Ordering};
[INFO] [stdout]   |                ^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:144:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Ord` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Ord` is imported redundantly
[INFO] [stdout]  --> src/executor/node_wrapper.rs:8:16
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::cmp::{Ord, Ordering};
[INFO] [stdout]   |                ^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:144:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Ord` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.66s
[INFO] running `Command { std: "docker" "inspect" "e28681f3d8beb37da4b9416238617d0a8beff965e9156b47ce8af40a14c20f7e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e28681f3d8beb37da4b9416238617d0a8beff965e9156b47ce8af40a14c20f7e", kill_on_drop: false }`
[INFO] [stdout] e28681f3d8beb37da4b9416238617d0a8beff965e9156b47ce8af40a14c20f7e
[INFO] checking ncomm-0.3.0 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate ncomm 0.3.0 into /workspace/builds/worker-1-tc2/source
[INFO] validating manifest of crates.io crate ncomm 0.3.0 on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ncomm 0.3.0
[INFO] finished tweaking crates.io crate ncomm 0.3.0
[INFO] tweaked toml for crates.io crate ncomm 0.3.0 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 30 packages
[INFO] [stderr]       Adding cfg_aliases v0.1.1 (latest: v0.2.0)
[INFO] [stderr]       Adding radium v0.7.0 (latest: v1.1.0)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding wyz v0.5.1 (latest: v0.6.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1a020c104e4b56e73f5bf920c10b840c4cc4ea51e2c7e4ded5b0f804645f74df
[INFO] running `Command { std: "docker" "start" "-a" "1a020c104e4b56e73f5bf920c10b840c4cc4ea51e2c7e4ded5b0f804645f74df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1a020c104e4b56e73f5bf920c10b840c4cc4ea51e2c7e4ded5b0f804645f74df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1a020c104e4b56e73f5bf920c10b840c4cc4ea51e2c7e4ded5b0f804645f74df", kill_on_drop: false }`
[INFO] [stdout] 1a020c104e4b56e73f5bf920c10b840c4cc4ea51e2c7e4ded5b0f804645f74df
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5cb680677bfe82285b3f650029e8c79ba208926f2d319493f5deb9356658acaa
[INFO] running `Command { std: "docker" "start" "-a" "5cb680677bfe82285b3f650029e8c79ba208926f2d319493f5deb9356658acaa", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling nix v0.28.0
[INFO] [stderr]     Checking ctrlc v3.4.4
[INFO] [stderr]     Checking ncomm v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Ord` is imported redundantly
[INFO] [stdout]  --> src/executor/node_wrapper.rs:8:16
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::cmp::{Ord, Ordering};
[INFO] [stdout]   |                ^^^
[INFO] [stdout]  --> /rustc/2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2/library/std/src/prelude/mod.rs:144:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Ord` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Ord` is imported redundantly
[INFO] [stdout]  --> src/executor/node_wrapper.rs:8:16
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::cmp::{Ord, Ordering};
[INFO] [stdout]   |                ^^^
[INFO] [stdout]  --> /rustc/2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2/library/std/src/prelude/mod.rs:144:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Ord` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.70s
[INFO] running `Command { std: "docker" "inspect" "5cb680677bfe82285b3f650029e8c79ba208926f2d319493f5deb9356658acaa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5cb680677bfe82285b3f650029e8c79ba208926f2d319493f5deb9356658acaa", kill_on_drop: false }`
[INFO] [stdout] 5cb680677bfe82285b3f650029e8c79ba208926f2d319493f5deb9356658acaa