[INFO] fetching crate mrkl 0.0.4...
[INFO] testing mrkl-0.0.4 against 1.55.0 for beta-1.56-1
[INFO] extracting crate mrkl 0.0.4 into /workspace/builds/worker-21/source
[INFO] validating manifest of crates.io crate mrkl 0.0.4 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 mrkl 0.0.4
[INFO] finished tweaking crates.io crate mrkl 0.0.4
[INFO] tweaked toml for crates.io crate mrkl 0.0.4 written to /workspace/builds/worker-21/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded digest-hash v0.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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] 3cbfdf23976a53fcfc025c9be153d562944cd5cab4927de74155e0c772716583
[INFO] running `Command { std: "docker" "start" "-a" "3cbfdf23976a53fcfc025c9be153d562944cd5cab4927de74155e0c772716583", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3cbfdf23976a53fcfc025c9be153d562944cd5cab4927de74155e0c772716583", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3cbfdf23976a53fcfc025c9be153d562944cd5cab4927de74155e0c772716583", kill_on_drop: false }`
[INFO] [stdout] 3cbfdf23976a53fcfc025c9be153d562944cd5cab4927de74155e0c772716583
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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] a9f9d199417aed2e75aca5d64ee44c89efba72c65d027a0569e54a14897580dc
[INFO] running `Command { std: "docker" "start" "-a" "a9f9d199417aed2e75aca5d64ee44c89efba72c65d027a0569e54a14897580dc", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling libc v0.2.101
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling generic-array v0.12.4
[INFO] [stderr]    Compiling digest v0.8.1
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]    Compiling digest-hash v0.3.0
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling mrkl v0.0.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 23s
[INFO] running `Command { std: "docker" "inspect" "a9f9d199417aed2e75aca5d64ee44c89efba72c65d027a0569e54a14897580dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a9f9d199417aed2e75aca5d64ee44c89efba72c65d027a0569e54a14897580dc", kill_on_drop: false }`
[INFO] [stdout] a9f9d199417aed2e75aca5d64ee44c89efba72c65d027a0569e54a14897580dc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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] 14bef10db2b16a5af860523039f09c1ef7a25c0c67230e1bf3f039890f4ed2f0
[INFO] running `Command { std: "docker" "start" "-a" "14bef10db2b16a5af860523039f09c1ef7a25c0c67230e1bf3f039890f4ed2f0", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde_json v1.0.67
[INFO] [stderr]    Compiling fake-simd v0.1.2
[INFO] [stderr]    Compiling block-buffer v0.7.3
[INFO] [stderr]    Compiling sha2 v0.8.2
[INFO] [stderr]    Compiling mrkl v0.0.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 4.66s
[INFO] running `Command { std: "docker" "inspect" "14bef10db2b16a5af860523039f09c1ef7a25c0c67230e1bf3f039890f4ed2f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "14bef10db2b16a5af860523039f09c1ef7a25c0c67230e1bf3f039890f4ed2f0", kill_on_drop: false }`
[INFO] [stdout] 14bef10db2b16a5af860523039f09c1ef7a25c0c67230e1bf3f039890f4ed2f0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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] 28d0a670130cb12d96101ab0f8df41fe6df8a83bfa125a801620fd343d658510
[INFO] running `Command { std: "docker" "start" "-a" "28d0a670130cb12d96101ab0f8df41fe6df8a83bfa125a801620fd343d658510", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.25s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/mrkl-be7ac110cd7e18dd)
[INFO] [stdout] 
[INFO] [stdout] running 31 tests
[INFO] [stdout] test digest::tests::endian_digest_with_custom_node_hasher ... ok
[INFO] [stdout] test digest::tests::byte_digest_with_custom_node_hasher ... ok
[INFO] [stdout] test digest::tests::hash_byte_input ... ok
[INFO] [stdout] test digest::tests::hash_endian_input ... ok
[INFO] [stdout] test leaf::tests::no_data_is_cloneable ... ok
[INFO] [stdout] test leaf::tests::owned_is_always_cloneable ... ok
[INFO] [stdout] test leaf::tests::result_of_extract_with_is_cloneable ... ok
[INFO] [stdout] test tree::builder::tests::builder_leaf_extract_with_closure ... ok
[INFO] [stdout] test tree::builder::tests::builder_leaf_extract_with_plain_fn ... ok
[INFO] [stdout] test tree::builder::tests::builder_no_data_fixed_size_array ... ok
[INFO] [stdout] test tree::builder::tests::builder_over_nonstatic_slice ... ok
[INFO] [stdout] test tree::builder::tests::builder_with_owned_leaves ... ok
[INFO] [stdout] test tree::builder::tests::cant_make_full_from_empty ... ok
[INFO] [stdout] test tree::builder::tests::collect_children_for_arbitrary_arity_tree ... ok
[INFO] [stdout] test tree::builder::tests::complete_tree_from_empty ... ok
[INFO] [stdout] test tree::builder::tests::complete_tree_is_subgraph_of_its_math_definition ... ok
[INFO] [stdout] test tree::builder::tests::complete_tree_using_leaf_extract_closure ... ok
[INFO] [stdout] test tree::builder::tests::complete_tree_with_no_leaf_data ... ok
[INFO] [stdout] test tree::builder::tests::complete_tree_using_leaf_extract_with ... ok
[INFO] [stdout] test tree::builder::tests::complete_tree_with_owned_leaf_data ... ok
[INFO] [stdout] test tree::builder::tests::full_tree_is_full ... ok
[INFO] [stdout] test tree::builder::tests::stack_trees ... ok
[INFO] [stdout] test tree::builder::tests::two_leaves_make_a_tree ... ok
[INFO] [stdout] test tree::parallel::tests::cant_make_full_from_empty ... ok
[INFO] [stdout] test tree::parallel::tests::complete_tree_from_empty ... ok
[INFO] [stdout] test tree::builder::tests::child_out_of_range - should panic ... ok
[INFO] [stdout] test tree::parallel::tests::complete_leaf ... ok
[INFO] [stdout] test tree::parallel::tests::complete_tree_is_subgraph_of_its_math_definition ... ok
[INFO] [stdout] test tree::parallel::tests::complete_tree ... ok
[INFO] [stdout] test tree::parallel::tests::collect_nodes_for_arbitrary_arity_tree ... ok
[INFO] [stdout] test tree::parallel::tests::full_tree_is_full ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 31 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.51s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/test-serialization.rs (/opt/rustwide/target/debug/deps/test_serialization-8aa20daa983a3562)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stderr]    Doc-tests mrkl
[INFO] [stdout] test serialize ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.05s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test src/tree/builder.rs - tree::builder::Builder<D, L>::full_tree_from (line 358) ... ok
[INFO] [stdout] test src/tree/builder.rs - tree::builder::Builder<D, leaf::NoData<In>>::new (line 90) ... ok
[INFO] [stdout] test src/tree/builder.rs - tree::builder::Builder<D, L>::complete_tree_from (line 255) ... ok
[INFO] [stdout] test src/tree/parallel.rs - tree::parallel (line 23) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 3.83s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "28d0a670130cb12d96101ab0f8df41fe6df8a83bfa125a801620fd343d658510", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "28d0a670130cb12d96101ab0f8df41fe6df8a83bfa125a801620fd343d658510", kill_on_drop: false }`
[INFO] [stdout] 28d0a670130cb12d96101ab0f8df41fe6df8a83bfa125a801620fd343d658510