[INFO] cloning repository https://github.com/shuternay/random-tree-generators
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/shuternay/random-tree-generators" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshuternay%2Frandom-tree-generators", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshuternay%2Frandom-tree-generators'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 26945cf908feaedc1982e52e31e9b170f96e305a
[INFO] testing shuternay/random-tree-generators against try#17092ad00ed8fe1e7f81a7e38238ff70779034b1 for pr-140985
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshuternay%2Frandom-tree-generators" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/shuternay/random-tree-generators on toolchain 17092ad00ed8fe1e7f81a7e38238ff70779034b1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+17092ad00ed8fe1e7f81a7e38238ff70779034b1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/shuternay/random-tree-generators
[INFO] finished tweaking git repo https://github.com/shuternay/random-tree-generators
[INFO] tweaked toml for git repo https://github.com/shuternay/random-tree-generators written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/shuternay/random-tree-generators already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+17092ad00ed8fe1e7f81a7e38238ff70779034b1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+17092ad00ed8fe1e7f81a7e38238ff70779034b1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c416fd21fc5da4cb1aa635698a394b7df77f70771f5c7fcea489032933f295fb
[INFO] running `Command { std: "docker" "start" "-a" "c416fd21fc5da4cb1aa635698a394b7df77f70771f5c7fcea489032933f295fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c416fd21fc5da4cb1aa635698a394b7df77f70771f5c7fcea489032933f295fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c416fd21fc5da4cb1aa635698a394b7df77f70771f5c7fcea489032933f295fb", kill_on_drop: false }`
[INFO] [stdout] c416fd21fc5da4cb1aa635698a394b7df77f70771f5c7fcea489032933f295fb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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" "RUSTDOCFLAGS=--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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+17092ad00ed8fe1e7f81a7e38238ff70779034b1" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2ea57143d11ae8c745dd5d06deb92ccb0bace9c1c34d7acefa1b3995b2ee30f2
[INFO] running `Command { std: "docker" "start" "-a" "2ea57143d11ae8c745dd5d06deb92ccb0bace9c1c34d7acefa1b3995b2ee30f2", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]    Compiling const_fn v0.4.3
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling rayon-core v1.9.0
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]    Compiling serde_json v1.0.59
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling syn v1.0.50
[INFO] [stderr]    Compiling itoa v0.4.6
[INFO] [stderr]    Compiling unicode-width v0.1.8
[INFO] [stderr]    Compiling serde_derive v1.0.117
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling itertools v0.9.0
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling half v1.6.0
[INFO] [stderr]    Compiling regex-syntax v0.6.21
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling walkdir v2.3.1
[INFO] [stderr]    Compiling csv-core v0.1.10
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling crossbeam-utils v0.8.0
[INFO] [stderr]    Compiling memoffset v0.5.6
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling regex-automata v0.1.9
[INFO] [stderr]    Compiling rayon v1.5.0
[INFO] [stderr]    Compiling oorandom v11.1.3
[INFO] [stderr]    Compiling bit-vec v0.6.2
[INFO] [stderr]    Compiling cast v0.2.3
[INFO] [stderr]    Compiling bit-set v0.5.2
[INFO] [stderr]    Compiling regex v1.4.2
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.0
[INFO] [stderr]    Compiling crossbeam-channel v0.5.0
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling crossbeam-deque v0.8.0
[INFO] [stderr]    Compiling criterion-plot v0.4.3
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling plotters v0.2.15
[INFO] [stderr]    Compiling bstr v0.2.14
[INFO] [stderr]    Compiling serde_cbor v0.11.1
[INFO] [stderr]    Compiling csv v1.1.4
[INFO] [stderr]    Compiling tinytemplate v1.1.0
[INFO] [stderr]    Compiling criterion v0.3.3
[INFO] [stderr]    Compiling random-tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `prufer_encode` is never used
[INFO] [stdout]    --> src/lib.rs:123:4
[INFO] [stdout]     |
[INFO] [stdout] 123 | fn prufer_encode(n: usize, tree: &Vec<(usize, usize)>) -> Vec<usize> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 24.49s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: criterion v0.3.3
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "2ea57143d11ae8c745dd5d06deb92ccb0bace9c1c34d7acefa1b3995b2ee30f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2ea57143d11ae8c745dd5d06deb92ccb0bace9c1c34d7acefa1b3995b2ee30f2", kill_on_drop: false }`
[INFO] [stdout] 2ea57143d11ae8c745dd5d06deb92ccb0bace9c1c34d7acefa1b3995b2ee30f2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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" "RUSTDOCFLAGS=--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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+17092ad00ed8fe1e7f81a7e38238ff70779034b1" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2971b51339d336d80c3a894288909f1eae4382d8b025fd1b7887734031f58b57
[INFO] running `Command { std: "docker" "start" "-a" "2971b51339d336d80c3a894288909f1eae4382d8b025fd1b7887734031f58b57", kill_on_drop: false }`
[INFO] [stderr]    Compiling random-tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `prufer_encode` is never used
[INFO] [stdout]    --> src/lib.rs:123:4
[INFO] [stdout]     |
[INFO] [stdout] 123 | fn prufer_encode(n: usize, tree: &Vec<(usize, usize)>) -> Vec<usize> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.78s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: criterion v0.3.3
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "2971b51339d336d80c3a894288909f1eae4382d8b025fd1b7887734031f58b57", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2971b51339d336d80c3a894288909f1eae4382d8b025fd1b7887734031f58b57", kill_on_drop: false }`
[INFO] [stdout] 2971b51339d336d80c3a894288909f1eae4382d8b025fd1b7887734031f58b57
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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" "RUSTDOCFLAGS=--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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+17092ad00ed8fe1e7f81a7e38238ff70779034b1" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 3019c09b9d859b443d218f912e02603494c790e88aa18ef6c07398e4800e54fb
[INFO] running `Command { std: "docker" "start" "-a" "3019c09b9d859b443d218f912e02603494c790e88aa18ef6c07398e4800e54fb", kill_on_drop: false }`
[INFO] [stderr] warning: function `prufer_encode` is never used
[INFO] [stderr]    --> src/lib.rs:123:4
[INFO] [stderr]     |
[INFO] [stderr] 123 | fn prufer_encode(n: usize, tree: &Vec<(usize, usize)>) -> Vec<usize> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `random-tree` (lib) generated 1 warning
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: criterion v0.3.3
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/random_tree-113052aa97cd4459)
[INFO] [stdout] 
[INFO] [stdout] running 11 tests
[INFO] [stdout] test tests::test_encode_decode_fast_prufer_ps07 ... ok
[INFO] [stdout] test tests::test_fast_decode_ww09 ... ok
[INFO] [stdout] test tests::test_fast_decode_ps_07 ... ok
[INFO] [stdout] test tests::test_naive_prufer ... ok
[INFO] [stdout] test tests::test_encode_decode_fast_prufer_www09 ... ok
[INFO] [stdout] test tests::test_fast_prufer_ps07_generator has been running for over 60 seconds
[INFO] [stdout] test tests::test_fast_prufer_www09_generator has been running for over 60 seconds
[INFO] [stdout] test tests::test_mapping_generator has been running for over 60 seconds
[INFO] [stdout] test tests::test_naive_prufer_generator has been running for over 60 seconds
[INFO] [stdout] test tests::test_walk_generator has been running for over 60 seconds
[INFO] [stdout] test tests::test_walk_reformulation_generator has been running for over 60 seconds
[INFO] [stdout] test tests::test_fast_prufer_www09_generator ... ok
[INFO] [stdout] test tests::test_fast_prufer_ps07_generator ... ok
[INFO] [stdout] test tests::test_naive_prufer_generator ... ok
[INFO] [stdout] test tests::test_walk_reformulation_generator ... ok
[INFO] [stdout] test tests::test_mapping_generator ... ok
[INFO] [stdout] test tests::test_walk_generator ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 11 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 492.47s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests random_tree
[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] running `Command { std: "docker" "inspect" "3019c09b9d859b443d218f912e02603494c790e88aa18ef6c07398e4800e54fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3019c09b9d859b443d218f912e02603494c790e88aa18ef6c07398e4800e54fb", kill_on_drop: false }`
[INFO] [stdout] 3019c09b9d859b443d218f912e02603494c790e88aa18ef6c07398e4800e54fb