[INFO] fetching crate stack-buf 0.1.6...
[INFO] testing stack-buf-0.1.6 against 1.55.0 for beta-1.56-1
[INFO] extracting crate stack-buf 0.1.6 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate stack-buf 0.1.6 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate stack-buf 0.1.6
[INFO] finished tweaking crates.io crate stack-buf 0.1.6
[INFO] tweaked toml for crates.io crate stack-buf 0.1.6 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 83b6e628fcc9872e8e4fb72b4b6905269db408a8df817077a492e01263b37815
[INFO] running `Command { std: "docker" "start" "-a" "83b6e628fcc9872e8e4fb72b4b6905269db408a8df817077a492e01263b37815", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "83b6e628fcc9872e8e4fb72b4b6905269db408a8df817077a492e01263b37815", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "83b6e628fcc9872e8e4fb72b4b6905269db408a8df817077a492e01263b37815", kill_on_drop: false }`
[INFO] [stdout] 83b6e628fcc9872e8e4fb72b4b6905269db408a8df817077a492e01263b37815
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 34253f60c2095c74c8413880620939b7cd124dc5d59e8b62991a1c6c46c57208
[INFO] running `Command { std: "docker" "start" "-a" "34253f60c2095c74c8413880620939b7cd124dc5d59e8b62991a1c6c46c57208", kill_on_drop: false }`
[INFO] [stderr]    Compiling stack-buf v0.1.6 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.82s
[INFO] running `Command { std: "docker" "inspect" "34253f60c2095c74c8413880620939b7cd124dc5d59e8b62991a1c6c46c57208", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "34253f60c2095c74c8413880620939b7cd124dc5d59e8b62991a1c6c46c57208", kill_on_drop: false }`
[INFO] [stdout] 34253f60c2095c74c8413880620939b7cd124dc5d59e8b62991a1c6c46c57208
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a9c197fe2ada87ced8cec170bf736378336a87cf80cdaf425dd9dbd9030d0620
[INFO] running `Command { std: "docker" "start" "-a" "a9c197fe2ada87ced8cec170bf736378336a87cf80cdaf425dd9dbd9030d0620", kill_on_drop: false }`
[INFO] [stderr]    Compiling stack-buf v0.1.6 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.47s
[INFO] running `Command { std: "docker" "inspect" "a9c197fe2ada87ced8cec170bf736378336a87cf80cdaf425dd9dbd9030d0620", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a9c197fe2ada87ced8cec170bf736378336a87cf80cdaf425dd9dbd9030d0620", kill_on_drop: false }`
[INFO] [stdout] a9c197fe2ada87ced8cec170bf736378336a87cf80cdaf425dd9dbd9030d0620
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 8586376c09c68090b6127353d13e51e46a5ff171c509c3a908138cebccf09c6d
[INFO] running `Command { std: "docker" "start" "-a" "8586376c09c68090b6127353d13e51e46a5ff171c509c3a908138cebccf09c6d", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.10s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/stack_buf-4ebfb18e02349e17)
[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]    Doc-tests stack-buf
[INFO] [stdout] 
[INFO] [stdout] running 29 tests
[INFO] [stdout] test src/vec.rs - vec::StackVec<T, N>::from_elem (line 701) ... ok
[INFO] [stdout] test src/vec.rs - vec::StackVec<T, N>::clear (line 373) ... ok
[INFO] [stdout] test src/vec.rs - vec::StackVec<T, N>::insert (line 396) ... ok
[INFO] [stdout] test src/vec.rs - vec::&'a StackVec<T, N> (line 1111) ... ok
[INFO] [stdout] test src/vec.rs - vec::StackVec<T, N> (line 1155) ... ok
[INFO] [stdout] test src/vec.rs - vec::StackVec<T, N>::retain (line 591) ... ok
[INFO] [stdout] test src/vec.rs - vec::StackVec<T, N>::capacity (line 221) ... ok
[INFO] [stdout] test src/vec.rs - vec::StackVec<T, N>::swap_remove (line 481) ... ok
[INFO] [stdout] test src/vec.rs - vec::StackVec<T, N>::remaining_capacity (line 236) ... ok
[INFO] [stdout] test src/vec.rs - vec::StackVec<T, N>::drain (line 531) ... ok
[INFO] [stdout] test src/vec.rs - vec::&'a mut StackVec<T, N> (line 1132) ... ok
[INFO] [stdout] test src/vec.rs - stack_vec (line 1340) ... ok
[INFO] [stdout] test src/vec.rs - stack_vec (line 1310) ... ok
[INFO] [stdout] test src/vec.rs - stack_vec (line 1324) ... ok
[INFO] [stdout] test src/vec.rs - vec::StackVec<T, N>::remove (line 438) ... ok
[INFO] [stdout] test src/vec.rs - vec::StackVec<T, N>::is_empty (line 188) ... ok
[INFO] [stdout] test src/vec.rs - vec::StackVec<T, N>::extend_from_slice (line 754) ... ok
[INFO] [stdout] test src/vec.rs - vec::StackVec<T, N>::push_elem (line 722) ... ok
[INFO] [stdout] test src/vec.rs - vec::StackVec<T, N>::copy_from_slice (line 827) ... ok
[INFO] [stdout] test src/vec.rs - vec::StackVec<T, N>::pop (line 314) ... ok
[INFO] [stdout] test src/vec.rs - vec::StackVec<T, N> (line 861) ... ok
[INFO] [stdout] test src/vec.rs - vec::StackVec<T, N>::truncate (line 343) ... ok
[INFO] [stdout] test src/vec.rs - vec::StackVec<T, N>::len (line 172) ... ok
[INFO] [stdout] test src/vec.rs - vec::StackVec<T, N>::dedup_by_key (line 673) ... ok
[INFO] [stdout] test src/vec.rs - vec::StackVec<T, N>::is_full (line 204) ... ok
[INFO] [stdout] test src/vec.rs - vec::StackVec<T, N>::resize (line 788) ... ok
[INFO] [stdout] test src/vec.rs - vec::StackVec<T, N>::new (line 150) ... ok
[INFO] [stdout] test src/vec.rs - vec::StackVec<T, N>::dedup_by (line 626) ... ok
[INFO] [stdout] test src/vec.rs - vec::StackVec<T, N>::push (line 294) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 29 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.89s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "8586376c09c68090b6127353d13e51e46a5ff171c509c3a908138cebccf09c6d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8586376c09c68090b6127353d13e51e46a5ff171c509c3a908138cebccf09c6d", kill_on_drop: false }`
[INFO] [stdout] 8586376c09c68090b6127353d13e51e46a5ff171c509c3a908138cebccf09c6d