[INFO] fetching crate tender 0.1.1...
[INFO] testing tender-0.1.1 against master#552a959051cebf8f88a8f558399baf733bec9ce0 for pr-136932
[INFO] extracting crate tender 0.1.1 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate tender 0.1.1 on toolchain 552a959051cebf8f88a8f558399baf733bec9ce0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+552a959051cebf8f88a8f558399baf733bec9ce0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tender 0.1.1
[INFO] finished tweaking crates.io crate tender 0.1.1
[INFO] tweaked toml for crates.io crate tender 0.1.1 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+552a959051cebf8f88a8f558399baf733bec9ce0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 43 packages to latest compatible versions
[INFO] [stderr]       Adding env_logger v0.9.3 (available: v0.11.6)
[INFO] [stderr]       Adding fastrand v1.9.0 (available: v2.3.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+552a959051cebf8f88a8f558399baf733bec9ce0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded watch v0.2.3
[INFO] [stderr]   Downloaded sync-wait-group v0.1.1
[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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+552a959051cebf8f88a8f558399baf733bec9ce0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 305ee72ab5c9402b402d007340f2c43f4ac0f830fcbc8c49b3e53b49b8873917
[INFO] running `Command { std: "docker" "start" "-a" "305ee72ab5c9402b402d007340f2c43f4ac0f830fcbc8c49b3e53b49b8873917", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "305ee72ab5c9402b402d007340f2c43f4ac0f830fcbc8c49b3e53b49b8873917", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "305ee72ab5c9402b402d007340f2c43f4ac0f830fcbc8c49b3e53b49b8873917", kill_on_drop: false }`
[INFO] [stdout] 305ee72ab5c9402b402d007340f2c43f4ac0f830fcbc8c49b3e53b49b8873917
[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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+552a959051cebf8f88a8f558399baf733bec9ce0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f95010ba1ed4f680f4365f798860acb1988ee53ec3b7bcf99ce2a9dd57ad72dc
[INFO] running `Command { std: "docker" "start" "-a" "f95010ba1ed4f680f4365f798860acb1988ee53ec3b7bcf99ce2a9dd57ad72dc", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.4.0
[INFO] [stderr]    Compiling libc v0.2.169
[INFO] [stderr]    Compiling parking_lot_core v0.9.10
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling scopeguard v1.2.0
[INFO] [stderr]    Compiling smallvec v1.13.2
[INFO] [stderr]    Compiling crossbeam-utils v0.8.21
[INFO] [stderr]    Compiling byteorder v1.5.0
[INFO] [stderr]    Compiling fastrand v1.9.0
[INFO] [stderr]    Compiling log v0.4.25
[INFO] [stderr]    Compiling fxhash v0.2.1
[INFO] [stderr]    Compiling lock_api v0.4.12
[INFO] [stderr]    Compiling crossbeam-channel v0.5.14
[INFO] [stderr]    Compiling parking_lot v0.12.3
[INFO] [stderr]    Compiling watch v0.2.3
[INFO] [stderr]    Compiling sync-wait-group v0.1.1
[INFO] [stderr]    Compiling tender v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/core/observer.rs:17:16
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub fn run(mut self) {
[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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.28s
[INFO] running `Command { std: "docker" "inspect" "f95010ba1ed4f680f4365f798860acb1988ee53ec3b7bcf99ce2a9dd57ad72dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f95010ba1ed4f680f4365f798860acb1988ee53ec3b7bcf99ce2a9dd57ad72dc", kill_on_drop: false }`
[INFO] [stdout] f95010ba1ed4f680f4365f798860acb1988ee53ec3b7bcf99ce2a9dd57ad72dc
[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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+552a959051cebf8f88a8f558399baf733bec9ce0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0836f292b8122b11ecbdb5a3d1ec50d6e22fe604c97c63a38087849fea2f55c6
[INFO] running `Command { std: "docker" "start" "-a" "0836f292b8122b11ecbdb5a3d1ec50d6e22fe604c97c63a38087849fea2f55c6", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.7.4
[INFO] [stderr]    Compiling regex-syntax v0.8.5
[INFO] [stderr]    Compiling log v0.4.25
[INFO] [stderr]    Compiling humantime v2.1.0
[INFO] [stderr]    Compiling termcolor v1.4.1
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling tender v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/core/observer.rs:17:16
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub fn run(mut self) {
[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] [stderr]    Compiling aho-corasick v1.1.3
[INFO] [stderr]    Compiling regex-automata v0.4.9
[INFO] [stderr]    Compiling regex v1.11.1
[INFO] [stderr]    Compiling env_logger v0.9.3
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/core/observer.rs:17:16
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub fn run(mut self) {
[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] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 8.44s
[INFO] running `Command { std: "docker" "inspect" "0836f292b8122b11ecbdb5a3d1ec50d6e22fe604c97c63a38087849fea2f55c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0836f292b8122b11ecbdb5a3d1ec50d6e22fe604c97c63a38087849fea2f55c6", kill_on_drop: false }`
[INFO] [stdout] 0836f292b8122b11ecbdb5a3d1ec50d6e22fe604c97c63a38087849fea2f55c6
[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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+552a959051cebf8f88a8f558399baf733bec9ce0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 43f904b0b18d4cdd932fec33023945db0795967336ecd692b836c6fd1cdab14b
[INFO] running `Command { std: "docker" "start" "-a" "43f904b0b18d4cdd932fec33023945db0795967336ecd692b836c6fd1cdab14b", kill_on_drop: false }`
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/core/observer.rs:17:16
[INFO] [stderr]    |
[INFO] [stderr] 17 |     pub fn run(mut self) {
[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: `tender` (lib) generated 1 warning (run `cargo fix --lib -p tender` to apply 1 suggestion)
[INFO] [stderr] warning: `tender` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/tender-308cd88ec7a5f556)
[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] [stderr]      Running tests/fixtures.rs (/opt/rustwide/target/debug/deps/fixtures-08f14d44e2d58b3b)
[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] [stderr]      Running tests/group_election.rs (/opt/rustwide/target/debug/deps/group_election-84b4f82bc4476b08)
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test test_election_with_initial_candidate ... ok
[INFO] [stdout] test test_move_leader ... ok
[INFO] [stdout] test test_election_with_quorum ... ok
[INFO] [stdout] test test_election_with_observer ... ok
[INFO] [stdout] test test_election ... ok
[INFO] [stdout] test test_step_up_and_down ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 10.03s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/single_node.rs (/opt/rustwide/target/debug/deps/single_node-08f3aff8b5fb9b08)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test test_single_node ... ok
[INFO] [stdout] test test_single_node_as_observer ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 3.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests tender
[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" "43f904b0b18d4cdd932fec33023945db0795967336ecd692b836c6fd1cdab14b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "43f904b0b18d4cdd932fec33023945db0795967336ecd692b836c6fd1cdab14b", kill_on_drop: false }`
[INFO] [stdout] 43f904b0b18d4cdd932fec33023945db0795967336ecd692b836c6fd1cdab14b