[INFO] fetching crate trivial-kernel 0.9.0...
[INFO] checking trivial-kernel-0.9.0 against master#642c19bfc3a5c1de985bf5d0cc8207ac9d22708a for pr-148577
[INFO] extracting crate trivial-kernel 0.9.0 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate trivial-kernel 0.9.0
[INFO] finished tweaking crates.io crate trivial-kernel 0.9.0
[INFO] tweaked toml for crates.io crate trivial-kernel 0.9.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate trivial-kernel 0.9.0 on toolchain 642c19bfc3a5c1de985bf5d0cc8207ac9d22708a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "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" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 1 package to latest compatible version
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded mmb-types v0.3.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 64c2dbf72cd9a34e3e9732dd146bed8f6653b2c9073b386084f56d2322bb2ac1
[INFO] running `Command { std: "docker" "start" "-a" "64c2dbf72cd9a34e3e9732dd146bed8f6653b2c9073b386084f56d2322bb2ac1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "64c2dbf72cd9a34e3e9732dd146bed8f6653b2c9073b386084f56d2322bb2ac1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "64c2dbf72cd9a34e3e9732dd146bed8f6653b2c9073b386084f56d2322bb2ac1", kill_on_drop: false }`
[INFO] [stdout] 64c2dbf72cd9a34e3e9732dd146bed8f6653b2c9073b386084f56d2322bb2ac1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b702f585b906e23a33fa2208a273409eb751b6ca64a8ca4c1b0bdd9e4ede6dbd
[INFO] running `Command { std: "docker" "start" "-a" "b702f585b906e23a33fa2208a273409eb751b6ca64a8ca4c1b0bdd9e4ede6dbd", kill_on_drop: false }`
[INFO] [stderr]     Checking mmb-types v0.3.1
[INFO] [stderr]     Checking trivial-kernel v0.9.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `1` is never read
[INFO] [stdout]   --> src/context/store.rs:74:54
[INFO] [stdout]    |
[INFO] [stdout] 74 | pub struct DisplayPackedPtr<'a, S: Store>(PackedPtr, &'a S);
[INFO] [stdout]    |            ---------------- field in this struct     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/context/store.rs:289:20
[INFO] [stdout]     |
[INFO] [stdout] 289 |     fn get_element(&self, ptr: Ptr) -> Option<ElementRef<Self::Var>>;
[INFO] [stdout]     |                    ^^^^^                      ^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                    |
[INFO] [stdout]     |                    the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 289 |     fn get_element(&self, ptr: Ptr) -> Option<ElementRef<'_, Self::Var>>;
[INFO] [stdout]     |                                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/context/store.rs:412:20
[INFO] [stdout]     |
[INFO] [stdout] 412 |     fn get_element(&self, ptr: Ptr) -> Option<ElementRef<Self::Var>> {
[INFO] [stdout]     |                    ^^^^^                      ^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                    |
[INFO] [stdout]     |                    the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 412 |     fn get_element(&self, ptr: Ptr) -> Option<ElementRef<'_, Self::Var>> {
[INFO] [stdout]     |                                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `1` is never read
[INFO] [stdout]   --> src/context/store.rs:74:54
[INFO] [stdout]    |
[INFO] [stdout] 74 | pub struct DisplayPackedPtr<'a, S: Store>(PackedPtr, &'a S);
[INFO] [stdout]    |            ---------------- field in this struct     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/context/store.rs:289:20
[INFO] [stdout]     |
[INFO] [stdout] 289 |     fn get_element(&self, ptr: Ptr) -> Option<ElementRef<Self::Var>>;
[INFO] [stdout]     |                    ^^^^^                      ^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                    |
[INFO] [stdout]     |                    the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 289 |     fn get_element(&self, ptr: Ptr) -> Option<ElementRef<'_, Self::Var>>;
[INFO] [stdout]     |                                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/context/store.rs:412:20
[INFO] [stdout]     |
[INFO] [stdout] 412 |     fn get_element(&self, ptr: Ptr) -> Option<ElementRef<Self::Var>> {
[INFO] [stdout]     |                    ^^^^^                      ^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                    |
[INFO] [stdout]     |                    the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 412 |     fn get_element(&self, ptr: Ptr) -> Option<ElementRef<'_, Self::Var>> {
[INFO] [stdout]     |                                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.20s
[INFO] running `Command { std: "docker" "inspect" "b702f585b906e23a33fa2208a273409eb751b6ca64a8ca4c1b0bdd9e4ede6dbd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b702f585b906e23a33fa2208a273409eb751b6ca64a8ca4c1b0bdd9e4ede6dbd", kill_on_drop: false }`
[INFO] [stdout] b702f585b906e23a33fa2208a273409eb751b6ca64a8ca4c1b0bdd9e4ede6dbd