[INFO] fetching crate lawn-protocol 0.3.0...
[INFO] checking lawn-protocol-0.3.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate lawn-protocol 0.3.0 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate lawn-protocol 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 lawn-protocol 0.3.0
[INFO] finished tweaking crates.io crate lawn-protocol 0.3.0
[INFO] tweaked toml for crates.io crate lawn-protocol 0.3.0 written to /workspace/builds/worker-0-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 bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding half v1.8.3 (latest: v2.4.0)
[INFO] [stderr]       Adding num-derive v0.3.3 (latest: v0.4.2)
[INFO] [stderr]       Adding object v0.32.2 (latest: v0.34.0)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[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] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr] `license` should be used if the package license can be expressed with a standard SPDX expression.
[INFO] [stderr] `license-file` should be used if the package uses a non-standard license.
[INFO] [stderr] See https://doc.rust-lang.org/cargo/reference/manifest.html#the-license-and-license-file-fields for more information.
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded lawn-constants v0.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 2ba14bdeee66e7e4f67321d78bc9ac652767e77e50cf96a9ab6d9b9fc071a942
[INFO] running `Command { std: "docker" "start" "-a" "2ba14bdeee66e7e4f67321d78bc9ac652767e77e50cf96a9ab6d9b9fc071a942", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2ba14bdeee66e7e4f67321d78bc9ac652767e77e50cf96a9ab6d9b9fc071a942", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2ba14bdeee66e7e4f67321d78bc9ac652767e77e50cf96a9ab6d9b9fc071a942", kill_on_drop: false }`
[INFO] [stdout] 2ba14bdeee66e7e4f67321d78bc9ac652767e77e50cf96a9ab6d9b9fc071a942
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 1a9a7add285f1af4f1d09503470c4e637838ebe44f9b51d40f54bf1b9aa084df
[INFO] running `Command { std: "docker" "start" "-a" "1a9a7add285f1af4f1d09503470c4e637838ebe44f9b51d40f54bf1b9aa084df", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr] `license` should be used if the package license can be expressed with a standard SPDX expression.
[INFO] [stderr] `license-file` should be used if the package uses a non-standard license.
[INFO] [stderr] See https://doc.rust-lang.org/cargo/reference/manifest.html#the-license-and-license-file-fields for more information.
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]    Compiling num-derive v0.3.3
[INFO] [stderr]     Checking lawn-constants v0.3.0
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]     Checking serde v1.0.197
[INFO] [stderr]     Checking serde_cbor v0.11.2
[INFO] [stderr]     Checking bytes v1.6.0
[INFO] [stderr]     Checking lawn-protocol v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated items `ID_MASK`, `first_id`, and `next_id` are never used
[INFO] [stdout]   --> src/config/mod.rs:13:11
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl Config {
[INFO] [stdout]    | ----------- associated items in this implementation
[INFO] [stdout] 13 |     const ID_MASK: u32 = 0x7fffffff;
[INFO] [stdout]    |           ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 25 |     pub(crate) fn first_id(&self) -> u32 {
[INFO] [stdout]    |                   ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 34 |     pub(crate) fn next_id(&self, id: u32) -> u32 {
[INFO] [stdout]    |                   ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `ID_MASK`, `first_id`, and `next_id` are never used
[INFO] [stdout]   --> src/config/mod.rs:13:11
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl Config {
[INFO] [stdout]    | ----------- associated items in this implementation
[INFO] [stdout] 13 |     const ID_MASK: u32 = 0x7fffffff;
[INFO] [stdout]    |           ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 25 |     pub(crate) fn first_id(&self) -> u32 {
[INFO] [stdout]    |                   ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 34 |     pub(crate) fn next_id(&self, id: u32) -> u32 {
[INFO] [stdout]    |                   ^^^^^^^
[INFO] [stdout]    |
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 14.57s
[INFO] running `Command { std: "docker" "inspect" "1a9a7add285f1af4f1d09503470c4e637838ebe44f9b51d40f54bf1b9aa084df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1a9a7add285f1af4f1d09503470c4e637838ebe44f9b51d40f54bf1b9aa084df", kill_on_drop: false }`
[INFO] [stdout] 1a9a7add285f1af4f1d09503470c4e637838ebe44f9b51d40f54bf1b9aa084df
[INFO] checking lawn-protocol-0.3.0 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate lawn-protocol 0.3.0 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate lawn-protocol 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 lawn-protocol 0.3.0
[INFO] finished tweaking crates.io crate lawn-protocol 0.3.0
[INFO] tweaked toml for crates.io crate lawn-protocol 0.3.0 written to /workspace/builds/worker-0-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]      Locking 30 packages
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding half v1.8.3 (latest: v2.4.0)
[INFO] [stderr]       Adding num-derive v0.3.3 (latest: v0.4.2)
[INFO] [stderr]       Adding object v0.32.2 (latest: v0.34.0)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[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] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr] `license` should be used if the package license can be expressed with a standard SPDX expression.
[INFO] [stderr] `license-file` should be used if the package uses a non-standard license.
[INFO] [stderr] See https://doc.rust-lang.org/cargo/reference/manifest.html#the-license-and-license-file-fields for more information.
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] b504ba4f24043f24b8ba673cf3398c66bf8d3ff84a7b5ec6a8a1416e7c9d70eb
[INFO] running `Command { std: "docker" "start" "-a" "b504ba4f24043f24b8ba673cf3398c66bf8d3ff84a7b5ec6a8a1416e7c9d70eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b504ba4f24043f24b8ba673cf3398c66bf8d3ff84a7b5ec6a8a1416e7c9d70eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b504ba4f24043f24b8ba673cf3398c66bf8d3ff84a7b5ec6a8a1416e7c9d70eb", kill_on_drop: false }`
[INFO] [stdout] b504ba4f24043f24b8ba673cf3398c66bf8d3ff84a7b5ec6a8a1416e7c9d70eb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 78df5d8cce596eff76ec28fe22d8e13cb18e0f3c9f13d5fe4eb878092a09a0e3
[INFO] running `Command { std: "docker" "start" "-a" "78df5d8cce596eff76ec28fe22d8e13cb18e0f3c9f13d5fe4eb878092a09a0e3", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr] `license` should be used if the package license can be expressed with a standard SPDX expression.
[INFO] [stderr] `license-file` should be used if the package uses a non-standard license.
[INFO] [stderr] See https://doc.rust-lang.org/cargo/reference/manifest.html#the-license-and-license-file-fields for more information.
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]    Compiling num-derive v0.3.3
[INFO] [stderr]     Checking lawn-constants v0.3.0
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]     Checking serde v1.0.197
[INFO] [stderr]     Checking serde_cbor v0.11.2
[INFO] [stderr]     Checking bytes v1.6.0
[INFO] [stderr]     Checking lawn-protocol v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated items `ID_MASK`, `first_id`, and `next_id` are never used
[INFO] [stdout]   --> src/config/mod.rs:13:11
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl Config {
[INFO] [stdout]    | ----------- associated items in this implementation
[INFO] [stdout] 13 |     const ID_MASK: u32 = 0x7fffffff;
[INFO] [stdout]    |           ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 25 |     pub(crate) fn first_id(&self) -> u32 {
[INFO] [stdout]    |                   ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 34 |     pub(crate) fn next_id(&self, id: u32) -> u32 {
[INFO] [stdout]    |                   ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `ID_MASK`, `first_id`, and `next_id` are never used
[INFO] [stdout]   --> src/config/mod.rs:13:11
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl Config {
[INFO] [stdout]    | ----------- associated items in this implementation
[INFO] [stdout] 13 |     const ID_MASK: u32 = 0x7fffffff;
[INFO] [stdout]    |           ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 25 |     pub(crate) fn first_id(&self) -> u32 {
[INFO] [stdout]    |                   ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 34 |     pub(crate) fn next_id(&self, id: u32) -> u32 {
[INFO] [stdout]    |                   ^^^^^^^
[INFO] [stdout]    |
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 14.02s
[INFO] running `Command { std: "docker" "inspect" "78df5d8cce596eff76ec28fe22d8e13cb18e0f3c9f13d5fe4eb878092a09a0e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "78df5d8cce596eff76ec28fe22d8e13cb18e0f3c9f13d5fe4eb878092a09a0e3", kill_on_drop: false }`
[INFO] [stdout] 78df5d8cce596eff76ec28fe22d8e13cb18e0f3c9f13d5fe4eb878092a09a0e3