[INFO] fetching crate better_btree 0.2.6...
[INFO] checking better_btree-0.2.6 against master#22572d0994593197593e2a1b7b18d720a9a349a7 for pr-126452-1
[INFO] extracting crate better_btree 0.2.6 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate better_btree 0.2.6 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 better_btree 0.2.6
[INFO] finished tweaking crates.io crate better_btree 0.2.6
[INFO] tweaked toml for crates.io crate better_btree 0.2.6 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] 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] 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] a9cca0ea5d7e0f55c1ca695f218978c7062ef7701f60767a6587c6c69dca478b
[INFO] running `Command { std: "docker" "start" "-a" "a9cca0ea5d7e0f55c1ca695f218978c7062ef7701f60767a6587c6c69dca478b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a9cca0ea5d7e0f55c1ca695f218978c7062ef7701f60767a6587c6c69dca478b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a9cca0ea5d7e0f55c1ca695f218978c7062ef7701f60767a6587c6c69dca478b", kill_on_drop: false }`
[INFO] [stdout] a9cca0ea5d7e0f55c1ca695f218978c7062ef7701f60767a6587c6c69dca478b
[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] f066c6dffc86066374f302b8d51706ecfafc574f492aeb7a29d0c0279ca985c1
[INFO] running `Command { std: "docker" "start" "-a" "f066c6dffc86066374f302b8d51706ecfafc574f492aeb7a29d0c0279ca985c1", kill_on_drop: false }`
[INFO] [stderr]     Checking better_btree v0.2.6 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `deref_mut` is never used
[INFO] [stdout]    --> src/node_ref.rs:243:9
[INFO] [stdout]     |
[INFO] [stdout] 237 | impl<'a, K, V> NodeRef<K, V, marker::Owned, marker::LeafNode> {
[INFO] [stdout]     | ------------------------------------------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 243 |     pub fn deref_mut(&mut self) -> &'a mut LeafNode<K, V> {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `deref_mut` is never used
[INFO] [stdout]    --> src/node_ref.rs:255:9
[INFO] [stdout]     |
[INFO] [stdout] 249 | impl<'a, K, V> NodeRef<K, V, marker::Owned, marker::InternalNode> {
[INFO] [stdout]     | ----------------------------------------------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 255 |     pub fn deref_mut(&mut self) -> &'a mut InternalNode<K, V> {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `deref_mut` is never used
[INFO] [stdout]    --> src/node_ref.rs:243:9
[INFO] [stdout]     |
[INFO] [stdout] 237 | impl<'a, K, V> NodeRef<K, V, marker::Owned, marker::LeafNode> {
[INFO] [stdout]     | ------------------------------------------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 243 |     pub fn deref_mut(&mut self) -> &'a mut LeafNode<K, V> {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `deref` is never used
[INFO] [stdout]    --> src/node_ref.rs:276:9
[INFO] [stdout]     |
[INFO] [stdout] 275 | impl<'a, K, V> NodeRef<K, V, marker::Mut<'a>, marker::LeafNode> {
[INFO] [stdout]     | --------------------------------------------------------------- method in this implementation
[INFO] [stdout] 276 |     pub fn deref(&self) -> &'a LeafNode<K, V> {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `deref_mut` is never used
[INFO] [stdout]    --> src/node_ref.rs:255:9
[INFO] [stdout]     |
[INFO] [stdout] 249 | impl<'a, K, V> NodeRef<K, V, marker::Owned, marker::InternalNode> {
[INFO] [stdout]     | ----------------------------------------------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 255 |     pub fn deref_mut(&mut self) -> &'a mut InternalNode<K, V> {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `deref` is never used
[INFO] [stdout]    --> src/node_ref.rs:288:9
[INFO] [stdout]     |
[INFO] [stdout] 287 | impl<'a, K, V> NodeRef<K, V, marker::Mut<'a>, marker::InternalNode> {
[INFO] [stdout]     | ------------------------------------------------------------------- method in this implementation
[INFO] [stdout] 288 |     pub fn deref(&self) -> &'a InternalNode<K, V> {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `deref` is never used
[INFO] [stdout]    --> src/node_ref.rs:276:9
[INFO] [stdout]     |
[INFO] [stdout] 275 | impl<'a, K, V> NodeRef<K, V, marker::Mut<'a>, marker::LeafNode> {
[INFO] [stdout]     | --------------------------------------------------------------- method in this implementation
[INFO] [stdout] 276 |     pub fn deref(&self) -> &'a LeafNode<K, V> {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `deref` is never used
[INFO] [stdout]    --> src/node_ref.rs:288:9
[INFO] [stdout]     |
[INFO] [stdout] 287 | impl<'a, K, V> NodeRef<K, V, marker::Mut<'a>, marker::InternalNode> {
[INFO] [stdout]     | ------------------------------------------------------------------- method in this implementation
[INFO] [stdout] 288 |     pub fn deref(&self) -> &'a InternalNode<K, V> {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.12s
[INFO] running `Command { std: "docker" "inspect" "f066c6dffc86066374f302b8d51706ecfafc574f492aeb7a29d0c0279ca985c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f066c6dffc86066374f302b8d51706ecfafc574f492aeb7a29d0c0279ca985c1", kill_on_drop: false }`
[INFO] [stdout] f066c6dffc86066374f302b8d51706ecfafc574f492aeb7a29d0c0279ca985c1
[INFO] checking better_btree-0.2.6 against try#6289438dbad80b1a0029c66dd3f6abf57c2c51be for pr-126452-1
[INFO] extracting crate better_btree 0.2.6 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate better_btree 0.2.6 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 better_btree 0.2.6
[INFO] finished tweaking crates.io crate better_btree 0.2.6
[INFO] tweaked toml for crates.io crate better_btree 0.2.6 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] 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] 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] 975bc8d80db7c026de53d33fcd00c136935bfe165e7b2793ccc66b0082182baa
[INFO] running `Command { std: "docker" "start" "-a" "975bc8d80db7c026de53d33fcd00c136935bfe165e7b2793ccc66b0082182baa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "975bc8d80db7c026de53d33fcd00c136935bfe165e7b2793ccc66b0082182baa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "975bc8d80db7c026de53d33fcd00c136935bfe165e7b2793ccc66b0082182baa", kill_on_drop: false }`
[INFO] [stdout] 975bc8d80db7c026de53d33fcd00c136935bfe165e7b2793ccc66b0082182baa
[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] a4622d0e389ea85cad6ce819dfd45f1d209f20bd2cd02f0d948e04f1bb19253a
[INFO] running `Command { std: "docker" "start" "-a" "a4622d0e389ea85cad6ce819dfd45f1d209f20bd2cd02f0d948e04f1bb19253a", kill_on_drop: false }`
[INFO] [stderr]     Checking better_btree v0.2.6 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `deref_mut` is never used
[INFO] [stdout]    --> src/node_ref.rs:243:9
[INFO] [stdout]     |
[INFO] [stdout] 237 | impl<'a, K, V> NodeRef<K, V, marker::Owned, marker::LeafNode> {
[INFO] [stdout]     | ------------------------------------------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 243 |     pub fn deref_mut(&mut self) -> &'a mut LeafNode<K, V> {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `deref_mut` is never used
[INFO] [stdout]    --> src/node_ref.rs:255:9
[INFO] [stdout]     |
[INFO] [stdout] 249 | impl<'a, K, V> NodeRef<K, V, marker::Owned, marker::InternalNode> {
[INFO] [stdout]     | ----------------------------------------------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 255 |     pub fn deref_mut(&mut self) -> &'a mut InternalNode<K, V> {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `deref` is never used
[INFO] [stdout]    --> src/node_ref.rs:276:9
[INFO] [stdout]     |
[INFO] [stdout] 275 | impl<'a, K, V> NodeRef<K, V, marker::Mut<'a>, marker::LeafNode> {
[INFO] [stdout]     | --------------------------------------------------------------- method in this implementation
[INFO] [stdout] 276 |     pub fn deref(&self) -> &'a LeafNode<K, V> {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `deref` is never used
[INFO] [stdout]    --> src/node_ref.rs:288:9
[INFO] [stdout]     |
[INFO] [stdout] 287 | impl<'a, K, V> NodeRef<K, V, marker::Mut<'a>, marker::InternalNode> {
[INFO] [stdout]     | ------------------------------------------------------------------- method in this implementation
[INFO] [stdout] 288 |     pub fn deref(&self) -> &'a InternalNode<K, V> {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `deref_mut` is never used
[INFO] [stdout]    --> src/node_ref.rs:243:9
[INFO] [stdout]     |
[INFO] [stdout] 237 | impl<'a, K, V> NodeRef<K, V, marker::Owned, marker::LeafNode> {
[INFO] [stdout]     | ------------------------------------------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 243 |     pub fn deref_mut(&mut self) -> &'a mut LeafNode<K, V> {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `deref_mut` is never used
[INFO] [stdout]    --> src/node_ref.rs:255:9
[INFO] [stdout]     |
[INFO] [stdout] 249 | impl<'a, K, V> NodeRef<K, V, marker::Owned, marker::InternalNode> {
[INFO] [stdout]     | ----------------------------------------------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 255 |     pub fn deref_mut(&mut self) -> &'a mut InternalNode<K, V> {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `deref` is never used
[INFO] [stdout]    --> src/node_ref.rs:276:9
[INFO] [stdout]     |
[INFO] [stdout] 275 | impl<'a, K, V> NodeRef<K, V, marker::Mut<'a>, marker::LeafNode> {
[INFO] [stdout]     | --------------------------------------------------------------- method in this implementation
[INFO] [stdout] 276 |     pub fn deref(&self) -> &'a LeafNode<K, V> {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `deref` is never used
[INFO] [stdout]    --> src/node_ref.rs:288:9
[INFO] [stdout]     |
[INFO] [stdout] 287 | impl<'a, K, V> NodeRef<K, V, marker::Mut<'a>, marker::InternalNode> {
[INFO] [stdout]     | ------------------------------------------------------------------- method in this implementation
[INFO] [stdout] 288 |     pub fn deref(&self) -> &'a InternalNode<K, V> {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.13s
[INFO] running `Command { std: "docker" "inspect" "a4622d0e389ea85cad6ce819dfd45f1d209f20bd2cd02f0d948e04f1bb19253a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a4622d0e389ea85cad6ce819dfd45f1d209f20bd2cd02f0d948e04f1bb19253a", kill_on_drop: false }`
[INFO] [stdout] a4622d0e389ea85cad6ce819dfd45f1d209f20bd2cd02f0d948e04f1bb19253a