[INFO] crate merkle-tree-stream 0.10.0 is already in cache
[INFO] extracting crate merkle-tree-stream 0.10.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/merkle-tree-stream/0.10.0
[INFO] extracting crate merkle-tree-stream 0.10.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/merkle-tree-stream/0.10.0
[INFO] validating manifest of merkle-tree-stream-0.10.0 on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of merkle-tree-stream-0.10.0 on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing merkle-tree-stream-0.10.0
[INFO] finished frobbing merkle-tree-stream-0.10.0
[INFO] frobbed toml for merkle-tree-stream-0.10.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/merkle-tree-stream/0.10.0/Cargo.toml
[INFO] started frobbing merkle-tree-stream-0.10.0
[INFO] finished frobbing merkle-tree-stream-0.10.0
[INFO] frobbed toml for merkle-tree-stream-0.10.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/merkle-tree-stream/0.10.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing merkle-tree-stream-0.10.0 against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/merkle-tree-stream/0.10.0:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 8e570d6b6de909e20e89a7faeacb5bc6b5944fe9237fec766d361f31a47d3aa7
[INFO] running `"docker" "start" "-a" "8e570d6b6de909e20e89a7faeacb5bc6b5944fe9237fec766d361f31a47d3aa7"`
[INFO] [stderr]    Compiling flat-tree v4.1.0
[INFO] [stderr]    Compiling merkle-tree-stream v0.10.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.56s
[INFO] running `"docker" "inspect" "8e570d6b6de909e20e89a7faeacb5bc6b5944fe9237fec766d361f31a47d3aa7"`
[INFO] running `"docker" "rm" "-f" "8e570d6b6de909e20e89a7faeacb5bc6b5944fe9237fec766d361f31a47d3aa7"`
[INFO] [stdout] 8e570d6b6de909e20e89a7faeacb5bc6b5944fe9237fec766d361f31a47d3aa7
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/merkle-tree-stream/0.10.0:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 9ee64ee8ff7454926b589caafb690e82f16a8bbaf3ca431ba818b8400ec0b5fb
[INFO] running `"docker" "start" "-a" "9ee64ee8ff7454926b589caafb690e82f16a8bbaf3ca431ba818b8400ec0b5fb"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling merkle-tree-stream v0.10.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> tests/lib.rs:127:38
[INFO] [stderr]     |
[INFO] [stderr] 127 | fn all_children(index: usize) -> Box<Iterator<Item = usize>> {
[INFO] [stderr]     |                                      ^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = usize>`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.34s
[INFO] running `"docker" "inspect" "9ee64ee8ff7454926b589caafb690e82f16a8bbaf3ca431ba818b8400ec0b5fb"`
[INFO] running `"docker" "rm" "-f" "9ee64ee8ff7454926b589caafb690e82f16a8bbaf3ca431ba818b8400ec0b5fb"`
[INFO] [stdout] 9ee64ee8ff7454926b589caafb690e82f16a8bbaf3ca431ba818b8400ec0b5fb
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/merkle-tree-stream/0.10.0:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 3aee8e1a97a8282e258ed18fd8a539138c0e12717762c1d509204db7c52f4d7c
[INFO] running `"docker" "start" "-a" "3aee8e1a97a8282e258ed18fd8a539138c0e12717762c1d509204db7c52f4d7c"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/merkle_tree_stream-093eea7a96264c2e
[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
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/lib-628eaf5e9963888d
[INFO] [stdout] 
[INFO] [stdout] running 9 tests
[INFO] [stdout] test mts_more_nodes ... ok
[INFO] [stdout] test mts_one_node ... ok
[INFO] [stdout] test contains_all_data_in_correct_order ... ok
[INFO] [stdout] test roots_are_subset_of_nodes ... ok
[INFO] [stdout] test all_nodes_are_reachable_from_roots ... ok
[INFO] [stdout] test hashes_change_when_data_is_changed ... ok
[INFO] [stdout] test mts_is_deterministic ... ok
[INFO] [stdout] test all_leaves_contain_data ... ok
[INFO] [stdout] test roots_have_no_parent ... ok
[INFO] [stderr]    Doc-tests merkle-tree-stream
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 9 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs -  (line 5) ... ok
[INFO] [stdout] test src/lib.rs - MerkleTreeStream (line 106) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "3aee8e1a97a8282e258ed18fd8a539138c0e12717762c1d509204db7c52f4d7c"`
[INFO] running `"docker" "rm" "-f" "3aee8e1a97a8282e258ed18fd8a539138c0e12717762c1d509204db7c52f4d7c"`
[INFO] [stdout] 3aee8e1a97a8282e258ed18fd8a539138c0e12717762c1d509204db7c52f4d7c