[INFO] fetching crate caves 0.2.1...
[INFO] testing caves-0.2.1 against try#8262275854dc0e5381c9d42d56257d94932c5a87 for pr-90799
[INFO] extracting crate caves 0.2.1 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate caves 0.2.1 on toolchain 8262275854dc0e5381c9d42d56257d94932c5a87
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate caves 0.2.1
[INFO] finished tweaking crates.io crate caves 0.2.1
[INFO] tweaked toml for crates.io crate caves 0.2.1 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded predicates v2.1.0
[INFO] [stderr]   Downloaded predicates-tree v1.0.4
[INFO] [stderr]   Downloaded assert_fs v1.0.6
[INFO] [stderr]   Downloaded globwalk v0.8.1
[INFO] [stderr]   Downloaded nix v0.20.2
[INFO] [stderr]   Downloaded globset v0.4.8
[INFO] [stderr]   Downloaded thread_local v1.1.3
[INFO] [stderr]   Downloaded rocksdb v0.15.0
[INFO] [stderr]   Downloaded ignore v0.4.18
[INFO] [stderr]   Downloaded termtree v0.2.3
[INFO] [stderr]   Downloaded predicates v1.0.8
[INFO] [stderr]   Downloaded atomicwrites v0.3.0
[INFO] [stderr]   Downloaded librocksdb-sys v6.20.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] eb3925d0ef770c6c59b0f252158a68b6cd85dcdbb6ee2ffa3b3f3fa8eaaf0c18
[INFO] running `Command { std: "docker" "start" "-a" "eb3925d0ef770c6c59b0f252158a68b6cd85dcdbb6ee2ffa3b3f3fa8eaaf0c18", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "eb3925d0ef770c6c59b0f252158a68b6cd85dcdbb6ee2ffa3b3f3fa8eaaf0c18", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eb3925d0ef770c6c59b0f252158a68b6cd85dcdbb6ee2ffa3b3f3fa8eaaf0c18", kill_on_drop: false }`
[INFO] [stdout] eb3925d0ef770c6c59b0f252158a68b6cd85dcdbb6ee2ffa3b3f3fa8eaaf0c18
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6963622687baee3682ab027fdf7664db297209093ef0250468c7fcd91fa86648
[INFO] running `Command { std: "docker" "start" "-a" "6963622687baee3682ab027fdf7664db297209093ef0250468c7fcd91fa86648", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.108
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling syn v1.0.82
[INFO] [stderr]    Compiling anyhow v1.0.51
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]    Compiling nix v0.20.2
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.4
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]    Compiling tempfile v3.2.0
[INFO] [stderr]    Compiling atomicwrites v0.3.0
[INFO] [stderr]    Compiling thiserror v1.0.30
[INFO] [stderr]    Compiling caves v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 14.17s
[INFO] running `Command { std: "docker" "inspect" "6963622687baee3682ab027fdf7664db297209093ef0250468c7fcd91fa86648", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6963622687baee3682ab027fdf7664db297209093ef0250468c7fcd91fa86648", kill_on_drop: false }`
[INFO] [stdout] 6963622687baee3682ab027fdf7664db297209093ef0250468c7fcd91fa86648
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0f160f429fbbf459385a5e5b4cc8275014c214721a63356b0d20abae8eed63cb
[INFO] running `Command { std: "docker" "start" "-a" "0f160f429fbbf459385a5e5b4cc8275014c214721a63356b0d20abae8eed63cb", kill_on_drop: false }`
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling once_cell v1.8.0
[INFO] [stderr]    Compiling predicates-core v1.0.2
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling termtree v0.2.3
[INFO] [stderr]    Compiling difflib v0.4.0
[INFO] [stderr]    Compiling difference v2.0.0
[INFO] [stderr]    Compiling normalize-line-endings v0.3.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling bstr v0.2.17
[INFO] [stderr]    Compiling predicates-tree v1.0.4
[INFO] [stderr]    Compiling itertools v0.10.1
[INFO] [stderr]    Compiling thread_local v1.1.3
[INFO] [stderr]    Compiling globset v0.4.8
[INFO] [stderr]    Compiling ignore v0.4.18
[INFO] [stderr]    Compiling float-cmp v0.8.0
[INFO] [stderr]    Compiling predicates v1.0.8
[INFO] [stderr]    Compiling predicates v2.1.0
[INFO] [stderr]    Compiling globwalk v0.8.1
[INFO] [stderr]    Compiling assert_fs v1.0.6
[INFO] [stderr]    Compiling caves v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 7.42s
[INFO] running `Command { std: "docker" "inspect" "0f160f429fbbf459385a5e5b4cc8275014c214721a63356b0d20abae8eed63cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f160f429fbbf459385a5e5b4cc8275014c214721a63356b0d20abae8eed63cb", kill_on_drop: false }`
[INFO] [stdout] 0f160f429fbbf459385a5e5b4cc8275014c214721a63356b0d20abae8eed63cb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 58ef0c8665959cdbf6f93ce61b6ab333822f219aaad7614c57c437552b135ac9
[INFO] running `Command { std: "docker" "start" "-a" "58ef0c8665959cdbf6f93ce61b6ab333822f219aaad7614c57c437552b135ac9", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/caves-f6dcc24c5b3d6279)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test tests::test_memory_backend_simple ... ok
[INFO] [stdout] test tests::test_file_backend_errors ... ok
[INFO] [stderr]    Doc-tests caves
[INFO] [stdout] test tests::test_file_backend_simple ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.44s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - Cave (line 83) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.53s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "58ef0c8665959cdbf6f93ce61b6ab333822f219aaad7614c57c437552b135ac9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "58ef0c8665959cdbf6f93ce61b6ab333822f219aaad7614c57c437552b135ac9", kill_on_drop: false }`
[INFO] [stdout] 58ef0c8665959cdbf6f93ce61b6ab333822f219aaad7614c57c437552b135ac9