[INFO] fetching crate concread 0.2.6...
[INFO] checking concread-0.2.6 against master#c919f490bbcd2b29b74016101f7ec71aaa24bdbb for pr-79073
[INFO] extracting crate concread 0.2.6 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate concread 0.2.6 on toolchain c919f490bbcd2b29b74016101f7ec71aaa24bdbb
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c919f490bbcd2b29b74016101f7ec71aaa24bdbb" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate concread 0.2.6
[INFO] finished tweaking crates.io crate concread 0.2.6
[INFO] tweaked toml for crates.io crate concread 0.2.6 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate concread 0.2.6 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c919f490bbcd2b29b74016101f7ec71aaa24bdbb" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+c919f490bbcd2b29b74016101f7ec71aaa24bdbb" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 18fe961ceb7d899b862f4aff744f105d6f8ee2ee0fd5f63f0068ad893b51329c
[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" "18fe961ceb7d899b862f4aff744f105d6f8ee2ee0fd5f63f0068ad893b51329c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "18fe961ceb7d899b862f4aff744f105d6f8ee2ee0fd5f63f0068ad893b51329c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "18fe961ceb7d899b862f4aff744f105d6f8ee2ee0fd5f63f0068ad893b51329c", kill_on_drop: false }`
[INFO] [stdout] 18fe961ceb7d899b862f4aff744f105d6f8ee2ee0fd5f63f0068ad893b51329c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+c919f490bbcd2b29b74016101f7ec71aaa24bdbb" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 32f80881f3a8d77b7d2ab30c107950cc0780f65aad08628dcb2c97227763e044
[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" "32f80881f3a8d77b7d2ab30c107950cc0780f65aad08628dcb2c97227763e044", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling proc-macro-hack v0.5.18
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]    Compiling proc-macro2 v1.0.20
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]     Checking instant v0.1.6
[INFO] [stderr]    Compiling syn v1.0.40
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling memoffset v0.5.5
[INFO] [stderr]    Compiling num-bigint v0.3.0
[INFO] [stderr]    Compiling num-iter v0.1.41
[INFO] [stderr]    Compiling num-rational v0.3.0
[INFO] [stderr]     Checking lock_api v0.4.1
[INFO] [stderr]     Checking crossbeam-utils v0.7.2
[INFO] [stderr]     Checking parking_lot_core v0.8.0
[INFO] [stderr]     Checking parking_lot v0.11.0
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking crossbeam-epoch v0.8.2
[INFO] [stderr]     Checking crossbeam-queue v0.2.3
[INFO] [stderr]     Checking crossbeam-channel v0.4.4
[INFO] [stderr]    Compiling standback v0.2.10
[INFO] [stderr]    Compiling time v0.2.17
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking crossbeam v0.7.3
[INFO] [stderr]    Compiling const-random-macro v0.1.8
[INFO] [stderr]     Checking num-complex v0.3.0
[INFO] [stderr]     Checking const-random v0.1.8
[INFO] [stderr]     Checking ahash v0.4.4
[INFO] [stderr]     Checking num v0.3.0
[INFO] [stderr]     Checking concread v0.2.6 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling time-macros-impl v0.1.1
[INFO] [stderr]     Checking time-macros v0.1.0
[INFO] [stdout] warning: associated function is never used: `tree_density`
[INFO] [stdout]    --> src/bptree/cursor.rs:479:19
[INFO] [stdout]     |
[INFO] [stdout] 479 |     pub(crate) fn tree_density(&self) -> (usize, usize) {
[INFO] [stdout]     |                   ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_branch`
[INFO] [stdout]    --> src/bptree/node.rs:267:19
[INFO] [stdout]     |
[INFO] [stdout] 267 |     pub(crate) fn is_branch(&self) -> bool {
[INFO] [stdout]     |                   ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_count`
[INFO] [stdout]    --> src/bptree/node.rs:830:8
[INFO] [stdout]     |
[INFO] [stdout] 830 |     fn set_count(&mut self, c: usize) {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_txid`
[INFO] [stdout]    --> src/bptree/mod.rs:286:19
[INFO] [stdout]     |
[INFO] [stdout] 286 |     pub(crate) fn get_txid(&self) -> u64 {
[INFO] [stdout]     |                   ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_txid`
[INFO] [stdout]    --> src/bptree/mod.rs:456:19
[INFO] [stdout]     |
[INFO] [stdout] 456 |     pub(crate) fn get_txid(&self) -> u64 {
[INFO] [stdout]     |                   ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test_bptree2_map_basic_concurrency_small`
[INFO] [stdout]    --> src/bptree/mod.rs:789:8
[INFO] [stdout]     |
[INFO] [stdout] 789 |     fn test_bptree2_map_basic_concurrency_small() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `tree_density`
[INFO] [stdout]    --> src/hashmap/cursor.rs:426:19
[INFO] [stdout]     |
[INFO] [stdout] 426 |     pub(crate) fn tree_density(&self) -> (usize, usize, usize) {
[INFO] [stdout]     |                   ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_branch`
[INFO] [stdout]    --> src/hashmap/node.rs:300:19
[INFO] [stdout]     |
[INFO] [stdout] 300 |     pub(crate) fn is_branch(&self) -> bool {
[INFO] [stdout]     |                   ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_slots`
[INFO] [stdout]    --> src/hashmap/node.rs:968:8
[INFO] [stdout]     |
[INFO] [stdout] 968 |     fn set_slots(&mut self, c: usize) {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 42.04s
[INFO] running `Command { std: "docker" "inspect" "32f80881f3a8d77b7d2ab30c107950cc0780f65aad08628dcb2c97227763e044", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "32f80881f3a8d77b7d2ab30c107950cc0780f65aad08628dcb2c97227763e044", kill_on_drop: false }`
[INFO] [stdout] 32f80881f3a8d77b7d2ab30c107950cc0780f65aad08628dcb2c97227763e044