[INFO] fetching crate rf-core 0.6.0...
[INFO] building rf-core-0.6.0 against master#ad85bc524b1ad696e42061ad8338d382dffbdbe5 for pr-146237-1
[INFO] extracting crate rf-core 0.6.0 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate rf-core 0.6.0
[INFO] finished tweaking crates.io crate rf-core 0.6.0
[INFO] tweaked toml for crates.io crate rf-core 0.6.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate rf-core 0.6.0 on toolchain ad85bc524b1ad696e42061ad8338d382dffbdbe5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "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" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 21 packages to latest compatible versions
[INFO] [stderr]       Adding rand v0.8.5 (available: v0.9.2)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6555ffe9542fe4a9eab73bc9e27c786b98ec7328aa190ed223d5de40583cf595
[INFO] running `Command { std: "docker" "start" "-a" "6555ffe9542fe4a9eab73bc9e27c786b98ec7328aa190ed223d5de40583cf595", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6555ffe9542fe4a9eab73bc9e27c786b98ec7328aa190ed223d5de40583cf595", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6555ffe9542fe4a9eab73bc9e27c786b98ec7328aa190ed223d5de40583cf595", kill_on_drop: false }`
[INFO] [stdout] 6555ffe9542fe4a9eab73bc9e27c786b98ec7328aa190ed223d5de40583cf595
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 73ef1919dfa54465329c26a14c017d74f20ee0b3da1c4ca8341ff3aee58f7e6a
[INFO] running `Command { std: "docker" "start" "-a" "73ef1919dfa54465329c26a14c017d74f20ee0b3da1c4ca8341ff3aee58f7e6a", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.101
[INFO] [stderr]    Compiling libc v0.2.176
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]    Compiling getrandom v0.2.16
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling rf-core v0.6.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lang.rs:158:10
[INFO] [stdout]     |
[INFO] [stdout] 158 |         |mut vm| {
[INFO] [stdout]     |          ----^^
[INFO] [stdout]     |          |
[INFO] [stdout]     |          help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `stack` and `is_folding` are never used
[INFO] [stdout]   --> src/vm/vm_status.rs:58:12
[INFO] [stdout]    |
[INFO] [stdout] 19 | impl VMStatus {
[INFO] [stdout]    | ------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 58 |     pub fn stack(&self) -> &VecDeque<(Path, i32, Option<i32>)> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 67 |     pub fn is_folding(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.28s
[INFO] running `Command { std: "docker" "inspect" "73ef1919dfa54465329c26a14c017d74f20ee0b3da1c4ca8341ff3aee58f7e6a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "73ef1919dfa54465329c26a14c017d74f20ee0b3da1c4ca8341ff3aee58f7e6a", kill_on_drop: false }`
[INFO] [stdout] 73ef1919dfa54465329c26a14c017d74f20ee0b3da1c4ca8341ff3aee58f7e6a
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b4bfd7bef15b47e74fffec04ec750d58a2bdd9ca13a30f901d037e25796303a0
[INFO] running `Command { std: "docker" "start" "-a" "b4bfd7bef15b47e74fffec04ec750d58a2bdd9ca13a30f901d037e25796303a0", kill_on_drop: false }`
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lang.rs:158:10
[INFO] [stdout]     |
[INFO] [stdout] 158 |         |mut vm| {
[INFO] [stdout]     |          ----^^
[INFO] [stdout]     |          |
[INFO] [stdout]     |          help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `stack` and `is_folding` are never used
[INFO] [stdout]   --> src/vm/vm_status.rs:58:12
[INFO] [stdout]    |
[INFO] [stdout] 19 | impl VMStatus {
[INFO] [stdout]    | ------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 58 |     pub fn stack(&self) -> &VecDeque<(Path, i32, Option<i32>)> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 67 |     pub fn is_folding(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rf-core v0.6.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around closure body
[INFO] [stdout]    --> tests/by_round/mod.rs:101:20
[INFO] [stdout]     |
[INFO] [stdout] 101 |             |a, b| (a + b),
[INFO] [stdout]     |                    ^     ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 101 -             |a, b| (a + b),
[INFO] [stdout] 101 +             |a, b| a + b,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around closure body
[INFO] [stdout]    --> tests/by_round/mod.rs:196:20
[INFO] [stdout]     |
[INFO] [stdout] 196 |             |a, b| (a + b),
[INFO] [stdout]     |                    ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 196 -             |a, b| (a + b),
[INFO] [stdout] 196 +             |a, b| a + b,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around closure body
[INFO] [stdout]   --> tests/gradient/mod.rs:50:29
[INFO] [stdout]    |
[INFO] [stdout] 50 |                 .filter(|n| (n > &0 && n < &6))
[INFO] [stdout]    |                             ^                ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 50 -                 .filter(|n| (n > &0 && n < &6))
[INFO] [stdout] 50 +                 .filter(|n| n > &0 && n < &6)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vm`
[INFO] [stdout]   --> tests/by_equivalence/mod.rs:31:14
[INFO] [stdout]    |
[INFO] [stdout] 31 |             |vm| 0,
[INFO] [stdout]    |              ^^ help: if this is intentional, prefix it with an underscore: `_vm`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vm`
[INFO] [stdout]    --> tests/by_equivalence/mod.rs:113:14
[INFO] [stdout]     |
[INFO] [stdout] 113 |             |vm| 0,
[INFO] [stdout]     |              ^^ help: if this is intentional, prefix it with an underscore: `_vm`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vm`
[INFO] [stdout]   --> tests/by_round/mod.rs:48:54
[INFO] [stdout]    |
[INFO] [stdout] 48 |     let result = round(&mut init_with_ctx(context), |vm| 10);
[INFO] [stdout]    |                                                      ^^ help: if this is intentional, prefix it with an underscore: `_vm`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vm1`
[INFO] [stdout]    --> tests/by_round/mod.rs:129:14
[INFO] [stdout]     |
[INFO] [stdout] 129 |             |vm1| 0,
[INFO] [stdout]     |              ^^^ help: if this is intentional, prefix it with an underscore: `_vm1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vm1`
[INFO] [stdout]    --> tests/by_round/mod.rs:139:14
[INFO] [stdout]     |
[INFO] [stdout] 139 |             |vm1| 0,
[INFO] [stdout]     |              ^^^ help: if this is intentional, prefix it with an underscore: `_vm1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vm3`
[INFO] [stdout]    --> tests/by_round/mod.rs:140:32
[INFO] [stdout]     |
[INFO] [stdout] 140 |             |vm2, _| rep(vm2, |vm3| 0, |vm4, _| expr_2(vm4)),
[INFO] [stdout]     |                                ^^^ help: if this is intentional, prefix it with an underscore: `_vm3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vm1`
[INFO] [stdout]    --> tests/by_round/mod.rs:234:67
[INFO] [stdout]     |
[INFO] [stdout] 234 |     let result = round(&mut init_with_ctx(context), |vm| nbr(vm, |vm1| 7));
[INFO] [stdout]     |                                                                   ^^^ help: if this is intentional, prefix it with an underscore: `_vm1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vm`
[INFO] [stdout]    --> tests/by_round/mod.rs:274:47
[INFO] [stdout]     |
[INFO] [stdout] 274 |     let program = |vm: &mut RoundVM| rep(vm, |vm| 9, |vm1, a| a * 2);
[INFO] [stdout]     |                                               ^^ help: if this is intentional, prefix it with an underscore: `_vm`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vm1`
[INFO] [stdout]    --> tests/by_round/mod.rs:274:55
[INFO] [stdout]     |
[INFO] [stdout] 274 |     let program = |vm: &mut RoundVM| rep(vm, |vm| 9, |vm1, a| a * 2);
[INFO] [stdout]     |                                                       ^^^ help: if this is intentional, prefix it with an underscore: `_vm1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `self_id` is never read
[INFO] [stdout]    --> tests/utils/mod.rs:137:9
[INFO] [stdout]     |
[INFO] [stdout] 136 | pub struct DeviceState {
[INFO] [stdout]     |            ----------- field in this struct
[INFO] [stdout] 137 |     pub self_id: i32,
[INFO] [stdout]     |         ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `DeviceState` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `devices` is never read
[INFO] [stdout]    --> tests/utils/mod.rs:151:9
[INFO] [stdout]     |
[INFO] [stdout] 150 | pub struct Topology {
[INFO] [stdout]     |            -------- field in this struct
[INFO] [stdout] 151 |     pub devices: Vec<i32>,
[INFO] [stdout]     |         ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Topology` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lang.rs:158:10
[INFO] [stdout]     |
[INFO] [stdout] 158 |         |mut vm| {
[INFO] [stdout]     |          ----^^
[INFO] [stdout]     |          |
[INFO] [stdout]     |          help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `status`
[INFO] [stdout]    --> src/vm/round_vm.rs:378:13
[INFO] [stdout]     |
[INFO] [stdout] 378 |         let status = VMStatus::new();
[INFO] [stdout]     |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_status`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vm`
[INFO] [stdout]    --> src/vm/round_vm.rs:383:13
[INFO] [stdout]     |
[INFO] [stdout] 383 |     fn expr(vm: &mut RoundVM) -> i32 {
[INFO] [stdout]     |             ^^ help: if this is intentional, prefix it with an underscore: `_vm`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vm`
[INFO] [stdout]    --> src/vm/round_vm.rs:454:34
[INFO] [stdout]     |
[INFO] [stdout] 454 |         let result = vm.isolate(|vm| 5 * 3);
[INFO] [stdout]     |                                  ^^ help: if this is intentional, prefix it with an underscore: `_vm`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `stack` is never used
[INFO] [stdout]   --> src/vm/vm_status.rs:58:12
[INFO] [stdout]    |
[INFO] [stdout] 19 | impl VMStatus {
[INFO] [stdout]    | ------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 58 |     pub fn stack(&self) -> &VecDeque<(Path, i32, Option<i32>)> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.69s
[INFO] running `Command { std: "docker" "inspect" "b4bfd7bef15b47e74fffec04ec750d58a2bdd9ca13a30f901d037e25796303a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b4bfd7bef15b47e74fffec04ec750d58a2bdd9ca13a30f901d037e25796303a0", kill_on_drop: false }`
[INFO] [stdout] b4bfd7bef15b47e74fffec04ec750d58a2bdd9ca13a30f901d037e25796303a0