[INFO] fetching crate hashtree 0.3.1...
[INFO] testing hashtree-0.3.1 against 1.59.0 for beta-1.60-1
[INFO] extracting crate hashtree 0.3.1 into /workspace/builds/worker-15/source
[INFO] validating manifest of crates.io crate hashtree 0.3.1 on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate hashtree 0.3.1
[INFO] finished tweaking crates.io crate hashtree 0.3.1
[INFO] tweaked toml for crates.io crate hashtree 0.3.1 written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded sha2 v0.10.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7b409430a2d3fc14e39f7f0a2a9aae22356c7087642393fdce765f8a6e4229d4
[INFO] running `Command { std: "docker" "start" "-a" "7b409430a2d3fc14e39f7f0a2a9aae22356c7087642393fdce765f8a6e4229d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7b409430a2d3fc14e39f7f0a2a9aae22356c7087642393fdce765f8a6e4229d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b409430a2d3fc14e39f7f0a2a9aae22356c7087642393fdce765f8a6e4229d4", kill_on_drop: false }`
[INFO] [stdout] 7b409430a2d3fc14e39f7f0a2a9aae22356c7087642393fdce765f8a6e4229d4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0df4b885d4eb859dc93a5e0a84befb7e34d79d98efc1a9dcaa5839932659b6e5
[INFO] running `Command { std: "docker" "start" "-a" "0df4b885d4eb859dc93a5e0a84befb7e34d79d98efc1a9dcaa5839932659b6e5", kill_on_drop: false }`
[INFO] [stderr]    Compiling generic-array v0.14.5
[INFO] [stderr]    Compiling block-buffer v0.10.2
[INFO] [stderr]    Compiling crypto-common v0.1.3
[INFO] [stderr]    Compiling digest v0.10.3
[INFO] [stderr]    Compiling sha2 v0.10.2
[INFO] [stderr]    Compiling hashtree v0.3.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]    --> src/lib.rs:184:39
[INFO] [stdout]     |
[INFO] [stdout] 184 |     pub fn insert<R: Read>(&mut self, data: &mut R) {
[INFO] [stdout]     |                                       ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.56s
[INFO] running `Command { std: "docker" "inspect" "0df4b885d4eb859dc93a5e0a84befb7e34d79d98efc1a9dcaa5839932659b6e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0df4b885d4eb859dc93a5e0a84befb7e34d79d98efc1a9dcaa5839932659b6e5", kill_on_drop: false }`
[INFO] [stdout] 0df4b885d4eb859dc93a5e0a84befb7e34d79d98efc1a9dcaa5839932659b6e5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 540afeca7c91bf259f5fbc42d82ba54b83b2212c1c72d07dc71de57557e08e62
[INFO] running `Command { std: "docker" "start" "-a" "540afeca7c91bf259f5fbc42d82ba54b83b2212c1c72d07dc71de57557e08e62", kill_on_drop: false }`
[INFO] [stderr]    Compiling hex-literal v0.3.4
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]    --> src/lib.rs:184:39
[INFO] [stdout]     |
[INFO] [stdout] 184 |     pub fn insert<R: Read>(&mut self, data: &mut R) {
[INFO] [stdout]     |                                       ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling hashtree v0.3.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]    --> src/lib.rs:184:39
[INFO] [stdout]     |
[INFO] [stdout] 184 |     pub fn insert<R: Read>(&mut self, data: &mut R) {
[INFO] [stdout]     |                                       ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.01s
[INFO] running `Command { std: "docker" "inspect" "540afeca7c91bf259f5fbc42d82ba54b83b2212c1c72d07dc71de57557e08e62", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "540afeca7c91bf259f5fbc42d82ba54b83b2212c1c72d07dc71de57557e08e62", kill_on_drop: false }`
[INFO] [stdout] 540afeca7c91bf259f5fbc42d82ba54b83b2212c1c72d07dc71de57557e08e62
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] badf39d0b197b7a43134a0c9e03ec5cba8d66ed78c0b1041535334686f2fa45f
[INFO] running `Command { std: "docker" "start" "-a" "badf39d0b197b7a43134a0c9e03ec5cba8d66ed78c0b1041535334686f2fa45f", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `data`
[INFO] [stderr]    --> src/lib.rs:184:39
[INFO] [stderr]     |
[INFO] [stderr] 184 |     pub fn insert<R: Read>(&mut self, data: &mut R) {
[INFO] [stderr]     |                                       ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `hashtree` (lib) generated 1 warning
[INFO] [stderr] warning: `hashtree` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/hashtree-cad72bc09f50a2c2)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test tests::one_byte_test ... ok
[INFO] [stdout] test tests::four_k_test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests hashtree
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test src/lib.rs - HashTree::is_empty (line 198) ... ok
[INFO] [stdout] test src/lib.rs - HashTree::new (line 71) ... ok
[INFO] [stdout] test src/lib.rs - HashTree::create (line 96) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.33s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "badf39d0b197b7a43134a0c9e03ec5cba8d66ed78c0b1041535334686f2fa45f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "badf39d0b197b7a43134a0c9e03ec5cba8d66ed78c0b1041535334686f2fa45f", kill_on_drop: false }`
[INFO] [stdout] badf39d0b197b7a43134a0c9e03ec5cba8d66ed78c0b1041535334686f2fa45f