[INFO] fetching crate git-stack 0.2.8...
[INFO] checking git-stack-0.2.8 against try#8de4b308b608cded0ebccf658a0fc719bce87d4e for pr-89056
[INFO] extracting crate git-stack 0.2.8 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate git-stack 0.2.8 on toolchain 8de4b308b608cded0ebccf658a0fc719bce87d4e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate git-stack 0.2.8
[INFO] finished tweaking crates.io crate git-stack 0.2.8
[INFO] tweaked toml for crates.io crate git-stack 0.2.8 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate crates.io crate git-stack 0.2.8 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded assert_cmd v1.0.8
[INFO] [stderr]   Downloaded git-config-env v0.1.1
[INFO] [stderr]   Downloaded predicates v2.0.2
[INFO] [stderr]   Downloaded clap-verbosity-flag v0.3.2
[INFO] [stderr]   Downloaded assert_fs v1.0.4
[INFO] [stderr]   Downloaded git-fixture v0.1.0
[INFO] [stderr]   Downloaded git2 v0.13.21
[INFO] [stderr]   Downloaded proc-exit v1.0.2
[INFO] [stderr]   Downloaded libgit2-sys v0.12.22+1.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cff7df9e0860c46da0851b67287da6784ce75b0f79c1599d3bae1dc7e098f154
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "cff7df9e0860c46da0851b67287da6784ce75b0f79c1599d3bae1dc7e098f154", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cff7df9e0860c46da0851b67287da6784ce75b0f79c1599d3bae1dc7e098f154", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cff7df9e0860c46da0851b67287da6784ce75b0f79c1599d3bae1dc7e098f154", kill_on_drop: false }`
[INFO] [stdout] cff7df9e0860c46da0851b67287da6784ce75b0f79c1599d3bae1dc7e098f154
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "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" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9f999b8429e517d29d1e7f8cc786ff60cf85a499feb753f0d61032925be8a243
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "9f999b8429e517d29d1e7f8cc786ff60cf85a499feb753f0d61032925be8a243", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.75
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]    Compiling radium v0.5.3
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking wyz v0.2.0
[INFO] [stderr]     Checking funty v1.1.0
[INFO] [stderr]     Checking tap v1.0.1
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]     Checking gimli v0.25.0
[INFO] [stderr]    Compiling eyre v0.6.5
[INFO] [stderr]     Checking itoa v0.4.8
[INFO] [stderr]     Checking rustc-demangle v0.1.21
[INFO] [stderr]     Checking indenter v0.3.3
[INFO] [stderr]     Checking proc-exit v1.0.2
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking difflib v0.4.0
[INFO] [stderr]     Checking maplit v1.0.2
[INFO] [stderr]     Checking yansi v0.5.0
[INFO] [stderr]    Compiling schemars v0.8.3
[INFO] [stderr]     Checking dtoa v0.4.8
[INFO] [stderr]     Checking dyn-clone v1.0.4
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling nom v6.1.2
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]     Checking tinyvec v1.3.1
[INFO] [stderr]     Checking thread_local v1.1.3
[INFO] [stderr]     Checking predicates-tree v1.0.3
[INFO] [stderr]     Checking itertools v0.10.1
[INFO] [stderr]    Compiling libc v0.2.101
[INFO] [stderr]     Checking crossbeam-utils v0.8.5
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking object v0.26.2
[INFO] [stderr]     Checking env_logger v0.9.0
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking uuid v0.8.2
[INFO] [stderr]    Compiling jobserver v0.1.24
[INFO] [stderr]     Checking bitvec v0.19.5
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking lexical-core v0.7.6
[INFO] [stderr]    Compiling cc v1.0.70
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]     Checking unicode-normalization v0.1.19
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking predicates v2.0.2
[INFO] [stderr]     Checking addr2line v0.16.0
[INFO] [stderr]     Checking tempfile v3.2.0
[INFO] [stderr]    Compiling libz-sys v1.1.3
[INFO] [stderr]    Compiling backtrace v0.3.61
[INFO] [stderr]    Compiling libgit2-sys v0.12.22+1.1.0
[INFO] [stderr]     Checking idna v0.2.3
[INFO] [stderr]     Checking os_type v2.3.0
[INFO] [stderr]     Checking url v2.2.2
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling serde_derive_internals v0.25.0
[INFO] [stderr]     Checking git2 v0.13.21
[INFO] [stderr]     Checking git-config-env v0.1.1
[INFO] [stderr]    Compiling structopt-derive v0.4.16
[INFO] [stderr]    Compiling schemars_derive v0.8.3
[INFO] [stderr]    Compiling derive_more v0.99.16
[INFO] [stderr]     Checking structopt v0.3.23
[INFO] [stderr]     Checking clap-verbosity-flag v0.3.2
[INFO] [stderr]     Checking bstr v0.2.16
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stderr]     Checking serde_json v1.0.67
[INFO] [stderr]     Checking serde_yaml v0.8.20
[INFO] [stderr]     Checking globset v0.4.8
[INFO] [stderr]     Checking assert_cmd v1.0.8
[INFO] [stderr]     Checking human-panic v1.0.3
[INFO] [stderr]     Checking ignore v0.4.18
[INFO] [stderr]     Checking git-stack v0.2.8 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking globwalk v0.8.1
[INFO] [stderr]     Checking assert_fs v1.0.4
[INFO] [stderr]     Checking git-fixture v0.1.0
[INFO] [stdout] warning: field is never read: `error`
[INFO] [stdout]    --> src/bin/git-branch-backup/main.rs:156:5
[INFO] [stdout]     |
[INFO] [stdout] 156 |     error: yansi::Style,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `warn`
[INFO] [stdout]    --> src/bin/git-branch-backup/main.rs:157:5
[INFO] [stdout]     |
[INFO] [stdout] 157 |     warn: yansi::Style,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `hint`
[INFO] [stdout]    --> src/bin/git-branch-backup/main.rs:160:5
[INFO] [stdout]     |
[INFO] [stdout] 160 |     hint: yansi::Style,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `error`
[INFO] [stdout]    --> src/bin/git-branch-backup/main.rs:156:5
[INFO] [stdout]     |
[INFO] [stdout] 156 |     error: yansi::Style,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `warn`
[INFO] [stdout]    --> src/bin/git-branch-backup/main.rs:157:5
[INFO] [stdout]     |
[INFO] [stdout] 157 |     warn: yansi::Style,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `hint`
[INFO] [stdout]    --> src/bin/git-branch-backup/main.rs:160:5
[INFO] [stdout]     |
[INFO] [stdout] 160 |     hint: yansi::Style,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 53.78s
[INFO] running `Command { std: "docker" "inspect" "9f999b8429e517d29d1e7f8cc786ff60cf85a499feb753f0d61032925be8a243", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9f999b8429e517d29d1e7f8cc786ff60cf85a499feb753f0d61032925be8a243", kill_on_drop: false }`
[INFO] [stdout] 9f999b8429e517d29d1e7f8cc786ff60cf85a499feb753f0d61032925be8a243