[INFO] fetching crate idheap 0.0.1...
[INFO] testing idheap-0.0.1 against try#b83b707f97d809763b7861afa7638871f3339a33 for pr-145838-1
[INFO] extracting crate idheap 0.0.1 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate idheap 0.0.1
[INFO] finished tweaking crates.io crate idheap 0.0.1
[INFO] tweaked toml for crates.io crate idheap 0.0.1 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate idheap 0.0.1 on toolchain b83b707f97d809763b7861afa7638871f3339a33
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "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" "+b83b707f97d809763b7861afa7638871f3339a33" "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" "+b83b707f97d809763b7861afa7638871f3339a33" "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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 90eb3304d8e9594203e966e4572d6f51c3215c4474df3a8b38e526c2bb3946f9
[INFO] running `Command { std: "docker" "start" "-a" "90eb3304d8e9594203e966e4572d6f51c3215c4474df3a8b38e526c2bb3946f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "90eb3304d8e9594203e966e4572d6f51c3215c4474df3a8b38e526c2bb3946f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90eb3304d8e9594203e966e4572d6f51c3215c4474df3a8b38e526c2bb3946f9", kill_on_drop: false }`
[INFO] [stdout] 90eb3304d8e9594203e966e4572d6f51c3215c4474df3a8b38e526c2bb3946f9
[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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a284dee6303601a34846f060cba6b4e3082796fc11c3eb521cb9b9e7001735a1
[INFO] running `Command { std: "docker" "start" "-a" "a284dee6303601a34846f060cba6b4e3082796fc11c3eb521cb9b9e7001735a1", kill_on_drop: false }`
[INFO] [stderr]    Compiling idheap v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:510:11
[INFO] [stdout]     |
[INFO] [stdout] 510 |       let mut newblock = mkblock(id, id);
[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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.38s
[INFO] running `Command { std: "docker" "inspect" "a284dee6303601a34846f060cba6b4e3082796fc11c3eb521cb9b9e7001735a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a284dee6303601a34846f060cba6b4e3082796fc11c3eb521cb9b9e7001735a1", kill_on_drop: false }`
[INFO] [stdout] a284dee6303601a34846f060cba6b4e3082796fc11c3eb521cb9b9e7001735a1
[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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4bcb069c744fe52171ad4897353f42dd6b0cd2bc2fc6a88eaedd546323f35af5
[INFO] running `Command { std: "docker" "start" "-a" "4bcb069c744fe52171ad4897353f42dd6b0cd2bc2fc6a88eaedd546323f35af5", kill_on_drop: false }`
[INFO] [stderr]    Compiling idheap v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:510:11
[INFO] [stdout]     |
[INFO] [stdout] 510 |       let mut newblock = mkblock(id, id);
[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: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:510:11
[INFO] [stdout]     |
[INFO] [stdout] 510 |       let mut newblock = mkblock(id, id);
[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] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.80s
[INFO] running `Command { std: "docker" "inspect" "4bcb069c744fe52171ad4897353f42dd6b0cd2bc2fc6a88eaedd546323f35af5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4bcb069c744fe52171ad4897353f42dd6b0cd2bc2fc6a88eaedd546323f35af5", kill_on_drop: false }`
[INFO] [stdout] 4bcb069c744fe52171ad4897353f42dd6b0cd2bc2fc6a88eaedd546323f35af5
[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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] c28447aa8ce994d8a85647e8228062270f228cfa7989090b0d8c3f89aca91cb7
[INFO] running `Command { std: "docker" "start" "-a" "c28447aa8ce994d8a85647e8228062270f228cfa7989090b0d8c3f89aca91cb7", kill_on_drop: false }`
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:510:11
[INFO] [stderr]     |
[INFO] [stderr] 510 |       let mut newblock = mkblock(id, id);
[INFO] [stderr]     |           ----^^^^^^^^
[INFO] [stderr]     |           |
[INFO] [stderr]     |           help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `idheap` (lib) generated 1 warning (run `cargo fix --lib -p idheap` to apply 1 suggestion)
[INFO] [stderr] warning: `idheap` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/idheap-0683da8a770e74e0)
[INFO] [stdout] running 15 tests
[INFO] [stdout] test tests::alloc_id_head ... ok
[INFO] [stdout] test tests::alloc_one ... ok
[INFO] [stdout] test tests::alloc_id_tail ... ok
[INFO] [stdout] test tests::deserialize_serialize ... ok
[INFO] [stdout] test tests::from_slice ... ok
[INFO] [stdout] test tests::from_strlist_fail ... ok
[INFO] [stdout] test tests::alloc_id_split ... ok
[INFO] [stdout] test tests::just_init ... ok
[INFO] [stdout] test tests::merge_front_and_back_add_tail ... ok
[INFO] [stdout] test tests::merge_front_and_back_add_head ... ok
[INFO] [stdout] test tests::single_id ... ok
[INFO] [stdout] test tests::send_to_thread ... ok
[INFO] [stdout] test tests::from_slice_fail ... ok
[INFO] [stdout] test tests::from_strlist ... ok
[INFO] [stdout] test tests::return_new_first_block ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 15 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests idheap
[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" "c28447aa8ce994d8a85647e8228062270f228cfa7989090b0d8c3f89aca91cb7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c28447aa8ce994d8a85647e8228062270f228cfa7989090b0d8c3f89aca91cb7", kill_on_drop: false }`
[INFO] [stdout] c28447aa8ce994d8a85647e8228062270f228cfa7989090b0d8c3f89aca91cb7