[INFO] fetching crate ethereum-trie-memory 0.5.0... [INFO] testing ethereum-trie-memory-0.5.0 against 1.59.0 for beta-1.60-1 [INFO] extracting crate ethereum-trie-memory 0.5.0 into /workspace/builds/worker-1/source [INFO] validating manifest of crates.io crate ethereum-trie-memory 0.5.0 on toolchain 1.59.0 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking crates.io crate ethereum-trie-memory 0.5.0 [INFO] finished tweaking crates.io crate ethereum-trie-memory 0.5.0 [INFO] tweaked toml for crates.io crate ethereum-trie-memory 0.5.0 written to /workspace/builds/worker-1/source/Cargo.toml [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }` [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 2e2f685f2d61a8d8891041da6f62fa4a0928a3cdd7ce51ef0747ff5acb020d2b [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "2e2f685f2d61a8d8891041da6f62fa4a0928a3cdd7ce51ef0747ff5acb020d2b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "2e2f685f2d61a8d8891041da6f62fa4a0928a3cdd7ce51ef0747ff5acb020d2b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "2e2f685f2d61a8d8891041da6f62fa4a0928a3cdd7ce51ef0747ff5acb020d2b", kill_on_drop: false }` [INFO] [stdout] 2e2f685f2d61a8d8891041da6f62fa4a0928a3cdd7ce51ef0747ff5acb020d2b [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] 31ddb98f0b89e29e362fb26b4e33025bea5eaf623c35fab435219d76906609b1 [INFO] running `Command { std: "docker" "start" "-a" "31ddb98f0b89e29e362fb26b4e33025bea5eaf623c35fab435219d76906609b1", kill_on_drop: false }` [INFO] [stderr] Compiling ethereum-trie-memory v0.5.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused `#[macro_use]` import [INFO] [stdout] --> src/lib.rs:2:1 [INFO] [stdout] | [INFO] [stdout] 2 | #[macro_use] [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `DatabaseHandle` [INFO] [stdout] --> src/memory.rs:2:12 [INFO] [stdout] | [INFO] [stdout] 2 | use trie::{DatabaseHandle, Change, insert, delete, build, get, EMPTY_TRIE_HASH}; [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `Rlp` [INFO] [stdout] --> src/mutable.rs:3:17 [INFO] [stdout] | [INFO] [stdout] 3 | use rlp::{self, Rlp}; [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `trie::merkle::MerkleNode` [INFO] [stdout] --> src/cache.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use trie::merkle::MerkleNode; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `rlp::Rlp` [INFO] [stdout] --> src/cache.rs:3:5 [INFO] [stdout] | [INFO] [stdout] 3 | use rlp::Rlp; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/cache.rs:97:13 [INFO] [stdout] | [INFO] [stdout] 97 | let mut map = self.map.borrow_mut(); [INFO] [stdout] | ----^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/cache.rs:105:13 [INFO] [stdout] | [INFO] [stdout] 105 | let mut map = self.map.borrow_mut(); [INFO] [stdout] | ----^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 7 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 1.87s [INFO] running `Command { std: "docker" "inspect" "31ddb98f0b89e29e362fb26b4e33025bea5eaf623c35fab435219d76906609b1", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "31ddb98f0b89e29e362fb26b4e33025bea5eaf623c35fab435219d76906609b1", kill_on_drop: false }` [INFO] [stdout] 31ddb98f0b89e29e362fb26b4e33025bea5eaf623c35fab435219d76906609b1 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] bf01ac3266f3270e2658c225c4a902db31a324d8b711f4ccf97192ab2aec9aaa [INFO] running `Command { std: "docker" "start" "-a" "bf01ac3266f3270e2658c225c4a902db31a324d8b711f4ccf97192ab2aec9aaa", kill_on_drop: false }` [INFO] [stderr] Compiling ethereum-trie-memory v0.5.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused `#[macro_use]` import [INFO] [stdout] --> src/lib.rs:2:1 [INFO] [stdout] | [INFO] [stdout] 2 | #[macro_use] [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `DatabaseHandle` [INFO] [stdout] --> src/memory.rs:2:12 [INFO] [stdout] | [INFO] [stdout] 2 | use trie::{DatabaseHandle, Change, insert, delete, build, get, EMPTY_TRIE_HASH}; [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `Rlp` [INFO] [stdout] --> src/mutable.rs:3:17 [INFO] [stdout] | [INFO] [stdout] 3 | use rlp::{self, Rlp}; [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `trie::merkle::MerkleNode` [INFO] [stdout] --> src/cache.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use trie::merkle::MerkleNode; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `rlp::Rlp` [INFO] [stdout] --> src/cache.rs:3:5 [INFO] [stdout] | [INFO] [stdout] 3 | use rlp::Rlp; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/cache.rs:97:13 [INFO] [stdout] | [INFO] [stdout] 97 | let mut map = self.map.borrow_mut(); [INFO] [stdout] | ----^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/cache.rs:105:13 [INFO] [stdout] | [INFO] [stdout] 105 | let mut map = self.map.borrow_mut(); [INFO] [stdout] | ----^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 7 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `#[macro_use]` import [INFO] [stdout] --> src/lib.rs:2:1 [INFO] [stdout] | [INFO] [stdout] 2 | #[macro_use] [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `DatabaseHandle` [INFO] [stdout] --> src/memory.rs:2:12 [INFO] [stdout] | [INFO] [stdout] 2 | use trie::{DatabaseHandle, Change, insert, delete, build, get, EMPTY_TRIE_HASH}; [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `trie::merkle::MerkleNode` [INFO] [stdout] --> src/memory.rs:97:9 [INFO] [stdout] | [INFO] [stdout] 97 | use trie::merkle::MerkleNode; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `rlp::Rlp` [INFO] [stdout] --> src/memory.rs:98:9 [INFO] [stdout] | [INFO] [stdout] 98 | use rlp::Rlp; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::cell::UnsafeCell` [INFO] [stdout] --> src/memory.rs:102:9 [INFO] [stdout] | [INFO] [stdout] 102 | use std::cell::UnsafeCell; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `hexutil::read_hex` [INFO] [stdout] --> src/memory.rs:104:9 [INFO] [stdout] | [INFO] [stdout] 104 | use hexutil::read_hex; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `Rlp` [INFO] [stdout] --> src/mutable.rs:3:17 [INFO] [stdout] | [INFO] [stdout] 3 | use rlp::{self, Rlp}; [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `trie::merkle::MerkleNode` [INFO] [stdout] --> src/cache.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use trie::merkle::MerkleNode; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `rlp::Rlp` [INFO] [stdout] --> src/cache.rs:3:5 [INFO] [stdout] | [INFO] [stdout] 3 | use rlp::Rlp; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `value` [INFO] [stdout] --> src/memory.rs:134:19 [INFO] [stdout] | [INFO] [stdout] 134 | for (key, value) in &map { [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_value` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/cache.rs:97:13 [INFO] [stdout] | [INFO] [stdout] 97 | let mut map = self.map.borrow_mut(); [INFO] [stdout] | ----^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/cache.rs:105:13 [INFO] [stdout] | [INFO] [stdout] 105 | let mut map = self.map.borrow_mut(); [INFO] [stdout] | ----^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/memory.rs:116:13 [INFO] [stdout] | [INFO] [stdout] 116 | let mut btrie = MemoryTrieMut::build(&map); [INFO] [stdout] | ----^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 13 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 1.82s [INFO] running `Command { std: "docker" "inspect" "bf01ac3266f3270e2658c225c4a902db31a324d8b711f4ccf97192ab2aec9aaa", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "bf01ac3266f3270e2658c225c4a902db31a324d8b711f4ccf97192ab2aec9aaa", kill_on_drop: false }` [INFO] [stdout] bf01ac3266f3270e2658c225c4a902db31a324d8b711f4ccf97192ab2aec9aaa [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen", kill_on_drop: false }` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] 662a3949c7f10cf1a3b1b98259a733a49bd938a9d3617857da9c3aee00af57f7 [INFO] running `Command { std: "docker" "start" "-a" "662a3949c7f10cf1a3b1b98259a733a49bd938a9d3617857da9c3aee00af57f7", kill_on_drop: false }` [INFO] [stderr] warning: unused `#[macro_use]` import [INFO] [stderr] --> src/lib.rs:2:1 [INFO] [stderr] | [INFO] [stderr] 2 | #[macro_use] [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_imports)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused import: `DatabaseHandle` [INFO] [stderr] --> src/memory.rs:2:12 [INFO] [stderr] | [INFO] [stderr] 2 | use trie::{DatabaseHandle, Change, insert, delete, build, get, EMPTY_TRIE_HASH}; [INFO] [stderr] | ^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `Rlp` [INFO] [stderr] --> src/mutable.rs:3:17 [INFO] [stderr] | [INFO] [stderr] 3 | use rlp::{self, Rlp}; [INFO] [stderr] | ^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `trie::merkle::MerkleNode` [INFO] [stderr] --> src/cache.rs:1:5 [INFO] [stderr] | [INFO] [stderr] 1 | use trie::merkle::MerkleNode; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `rlp::Rlp` [INFO] [stderr] --> src/cache.rs:3:5 [INFO] [stderr] | [INFO] [stderr] 3 | use rlp::Rlp; [INFO] [stderr] | ^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/cache.rs:97:13 [INFO] [stderr] | [INFO] [stderr] 97 | let mut map = self.map.borrow_mut(); [INFO] [stderr] | ----^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_mut)]` on by default [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/cache.rs:105:13 [INFO] [stderr] | [INFO] [stderr] 105 | let mut map = self.map.borrow_mut(); [INFO] [stderr] | ----^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: unused import: `trie::merkle::MerkleNode` [INFO] [stderr] --> src/memory.rs:97:9 [INFO] [stderr] | [INFO] [stderr] 97 | use trie::merkle::MerkleNode; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `rlp::Rlp` [INFO] [stderr] --> src/memory.rs:98:9 [INFO] [stderr] | [INFO] [stderr] 98 | use rlp::Rlp; [INFO] [stderr] | ^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `std::cell::UnsafeCell` [INFO] [stderr] --> src/memory.rs:102:9 [INFO] [stderr] | [INFO] [stderr] 102 | use std::cell::UnsafeCell; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `hexutil::read_hex` [INFO] [stderr] --> src/memory.rs:104:9 [INFO] [stderr] | [INFO] [stderr] 104 | use hexutil::read_hex; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused variable: `value` [INFO] [stderr] --> src/memory.rs:134:19 [INFO] [stderr] | [INFO] [stderr] 134 | for (key, value) in &map { [INFO] [stderr] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_value` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/memory.rs:116:13 [INFO] [stderr] | [INFO] [stderr] 116 | let mut btrie = MemoryTrieMut::build(&map); [INFO] [stderr] | ----^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: `ethereum-trie-memory` (lib) generated 7 warnings [INFO] [stderr] warning: `ethereum-trie-memory` (lib test) generated 13 warnings (7 duplicates) [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.03s [INFO] [stdout] [INFO] [stderr] Running unittests (/opt/rustwide/target/debug/deps/trie_memory-4325dd9951706ee8) [INFO] [stdout] running 2 tests [INFO] [stdout] test memory::tests::trie_two_keys ... ok [INFO] [stderr] Doc-tests trie_memory [INFO] [stdout] test memory::tests::trie_middle_leaf ... ok [INFO] [stdout] [INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.04s [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] running `Command { std: "docker" "inspect" "662a3949c7f10cf1a3b1b98259a733a49bd938a9d3617857da9c3aee00af57f7", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "662a3949c7f10cf1a3b1b98259a733a49bd938a9d3617857da9c3aee00af57f7", kill_on_drop: false }` [INFO] [stdout] 662a3949c7f10cf1a3b1b98259a733a49bd938a9d3617857da9c3aee00af57f7