[INFO] fetching crate ddgg 0.10.1...
[INFO] checking ddgg-0.10.1 against master#22572d0994593197593e2a1b7b18d720a9a349a7 for pr-126452-1
[INFO] extracting crate ddgg 0.10.1 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate ddgg 0.10.1 on toolchain 22572d0994593197593e2a1b7b18d720a9a349a7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ddgg 0.10.1
[INFO] finished tweaking crates.io crate ddgg 0.10.1
[INFO] tweaked toml for crates.io crate ddgg 0.10.1 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" "+22572d0994593197593e2a1b7b18d720a9a349a7" "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 16 packages to latest compatible versions
[INFO] [stderr]       Adding heck v0.4.1 (latest: v0.5.0)
[INFO] [stderr]       Adding snafu v0.7.5 (latest: v0.8.4)
[INFO] [stderr]       Adding snafu-derive v0.7.5 (latest: v0.8.4)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.77)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b16e843bca86b7316df603a6aefa19a291910b3c26acaa3f1dfed7c437f26c7c
[INFO] running `Command { std: "docker" "start" "-a" "b16e843bca86b7316df603a6aefa19a291910b3c26acaa3f1dfed7c437f26c7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b16e843bca86b7316df603a6aefa19a291910b3c26acaa3f1dfed7c437f26c7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b16e843bca86b7316df603a6aefa19a291910b3c26acaa3f1dfed7c437f26c7c", kill_on_drop: false }`
[INFO] [stdout] b16e843bca86b7316df603a6aefa19a291910b3c26acaa3f1dfed7c437f26c7c
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4dd48a14f1aee68a4d3d0ec359b2f53d3c5221e5a249d5662c772af6f9ec24b1
[INFO] running `Command { std: "docker" "start" "-a" "4dd48a14f1aee68a4d3d0ec359b2f53d3c5221e5a249d5662c772af6f9ec24b1", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.209
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]    Compiling syn v2.0.77
[INFO] [stderr]    Compiling snafu-derive v0.7.5
[INFO] [stderr]     Checking snafu v0.7.5
[INFO] [stderr]    Compiling serde_derive v1.0.209
[INFO] [stderr]     Checking serde_json v1.0.127
[INFO] [stderr]     Checking ddgg v0.10.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `vec_ref` is never used
[INFO] [stdout]    --> src/gen_vec.rs:299:19
[INFO] [stdout]     |
[INFO] [stdout] 127 | impl<T> GenVec<T> {
[INFO] [stdout]     | ----------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 299 |     pub(crate) fn vec_ref(&self) -> &Vec<Element<T>> {
[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: method `vec_ref` is never used
[INFO] [stdout]    --> src/gen_vec.rs:299:19
[INFO] [stdout]     |
[INFO] [stdout] 127 | impl<T> GenVec<T> {
[INFO] [stdout]     | ----------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 299 |     pub(crate) fn vec_ref(&self) -> &Vec<Element<T>> {
[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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.10s
[INFO] running `Command { std: "docker" "inspect" "4dd48a14f1aee68a4d3d0ec359b2f53d3c5221e5a249d5662c772af6f9ec24b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4dd48a14f1aee68a4d3d0ec359b2f53d3c5221e5a249d5662c772af6f9ec24b1", kill_on_drop: false }`
[INFO] [stdout] 4dd48a14f1aee68a4d3d0ec359b2f53d3c5221e5a249d5662c772af6f9ec24b1
[INFO] checking ddgg-0.10.1 against try#6289438dbad80b1a0029c66dd3f6abf57c2c51be for pr-126452-1
[INFO] extracting crate ddgg 0.10.1 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate ddgg 0.10.1 on toolchain 6289438dbad80b1a0029c66dd3f6abf57c2c51be
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ddgg 0.10.1
[INFO] finished tweaking crates.io crate ddgg 0.10.1
[INFO] tweaked toml for crates.io crate ddgg 0.10.1 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" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "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 16 packages to latest compatible versions
[INFO] [stderr]       Adding heck v0.4.1 (latest: v0.5.0)
[INFO] [stderr]       Adding snafu v0.7.5 (latest: v0.8.4)
[INFO] [stderr]       Adding snafu-derive v0.7.5 (latest: v0.8.4)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.77)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "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-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c85235dd34644b940028035bb3e5a8d0350e4081837938aef6aa9e91c8078eea
[INFO] running `Command { std: "docker" "start" "-a" "c85235dd34644b940028035bb3e5a8d0350e4081837938aef6aa9e91c8078eea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c85235dd34644b940028035bb3e5a8d0350e4081837938aef6aa9e91c8078eea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c85235dd34644b940028035bb3e5a8d0350e4081837938aef6aa9e91c8078eea", kill_on_drop: false }`
[INFO] [stdout] c85235dd34644b940028035bb3e5a8d0350e4081837938aef6aa9e91c8078eea
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1969f760f381a5852eb595f77ab92fa50963533286ff8cb4517b7db7a1734a9b
[INFO] running `Command { std: "docker" "start" "-a" "1969f760f381a5852eb595f77ab92fa50963533286ff8cb4517b7db7a1734a9b", kill_on_drop: false }`
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]    Compiling serde v1.0.209
[INFO] [stderr]    Compiling syn v2.0.77
[INFO] [stderr]    Compiling snafu-derive v0.7.5
[INFO] [stderr]     Checking snafu v0.7.5
[INFO] [stderr]    Compiling serde_derive v1.0.209
[INFO] [stderr]     Checking serde_json v1.0.127
[INFO] [stderr]     Checking ddgg v0.10.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `vec_ref` is never used
[INFO] [stdout]    --> src/gen_vec.rs:299:19
[INFO] [stdout]     |
[INFO] [stdout] 127 | impl<T> GenVec<T> {
[INFO] [stdout]     | ----------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 299 |     pub(crate) fn vec_ref(&self) -> &Vec<Element<T>> {
[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: method `vec_ref` is never used
[INFO] [stdout]    --> src/gen_vec.rs:299:19
[INFO] [stdout]     |
[INFO] [stdout] 127 | impl<T> GenVec<T> {
[INFO] [stdout]     | ----------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 299 |     pub(crate) fn vec_ref(&self) -> &Vec<Element<T>> {
[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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 10.99s
[INFO] running `Command { std: "docker" "inspect" "1969f760f381a5852eb595f77ab92fa50963533286ff8cb4517b7db7a1734a9b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1969f760f381a5852eb595f77ab92fa50963533286ff8cb4517b7db7a1734a9b", kill_on_drop: false }`
[INFO] [stdout] 1969f760f381a5852eb595f77ab92fa50963533286ff8cb4517b7db7a1734a9b