[INFO] cloning repository https://github.com/nikomatsakis/skill-tree
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nikomatsakis/skill-tree" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnikomatsakis%2Fskill-tree", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnikomatsakis%2Fskill-tree'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d486693b750bacd7fa58ad1743e2f8c6bcba6cee
[INFO] checking nikomatsakis/skill-tree against try#4a04890980766cc79878135f5ade8c0c4321e943 for pr-65819
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnikomatsakis%2Fskill-tree" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nikomatsakis/skill-tree on toolchain 4a04890980766cc79878135f5ade8c0c4321e943
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/nikomatsakis/skill-tree
[INFO] finished tweaking git repo https://github.com/nikomatsakis/skill-tree
[INFO] tweaked toml for git repo https://github.com/nikomatsakis/skill-tree written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/nikomatsakis/skill-tree already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "fetch" "--locked" "--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 elasticlunr-rs v2.3.9
[INFO] [stderr]   Downloaded toml-query_derive v0.9.2
[INFO] [stderr]   Downloaded svg v0.5.12
[INFO] [stderr]   Downloaded staticfile v0.5.0
[INFO] [stderr]   Downloaded is-match v0.1.0
[INFO] [stderr]   Downloaded pulldown-cmark v0.6.1
[INFO] [stderr]   Downloaded gitignore v1.0.6
[INFO] [stderr]   Downloaded toml-query v0.9.2
[INFO] [stderr]   Downloaded mdbook v0.3.7
[INFO] [stderr]   Downloaded pulldown-cmark v0.7.1
[INFO] [stderr]   Downloaded toml_edit v0.1.5
[INFO] [stderr]   Downloaded pulldown-cmark-to-cmark v4.0.2
[INFO] [stderr]   Downloaded htmlescape v0.3.1
[INFO] [stderr]   Downloaded fehler v1.0.0-alpha.2
[INFO] [stderr]   Downloaded fehler-macros v1.0.0-alpha.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0d0af7f713f0a478142344754b83592a8a3ac538075dbe7028aec31d6b81ff15
[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" "0d0af7f713f0a478142344754b83592a8a3ac538075dbe7028aec31d6b81ff15", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0d0af7f713f0a478142344754b83592a8a3ac538075dbe7028aec31d6b81ff15", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d0af7f713f0a478142344754b83592a8a3ac538075dbe7028aec31d6b81ff15", kill_on_drop: false }`
[INFO] [stdout] 0d0af7f713f0a478142344754b83592a8a3ac538075dbe7028aec31d6b81ff15
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 34fc13e1ffbbdd383475a93dca6d7ac59a47b748728f673d6311c5eaf082369d
[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" "34fc13e1ffbbdd383475a93dca6d7ac59a47b748728f673d6311c5eaf082369d", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling syn v0.15.36
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling serde_json v1.0.55
[INFO] [stderr]    Compiling siphasher v0.3.3
[INFO] [stderr]     Checking smallvec v1.4.0
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling itoa v0.4.5
[INFO] [stderr]     Checking new_debug_unreachable v1.0.4
[INFO] [stderr]     Checking mac v0.1.1
[INFO] [stderr]     Checking precomputed-hash v0.1.1
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking safemem v0.3.3
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking htmlescape v0.3.1
[INFO] [stderr]     Checking svg v0.5.12
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]    Compiling pulldown-cmark v0.6.1
[INFO] [stderr]     Checking termcolor v1.1.0
[INFO] [stderr]    Compiling pulldown-cmark v0.7.1
[INFO] [stderr]     Checking is-match v0.1.0
[INFO] [stderr]     Checking strum v0.18.0
[INFO] [stderr]     Checking ascii v0.9.3
[INFO] [stderr]     Checking shlex v0.1.1
[INFO] [stderr]     Checking open v1.4.0
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]    Compiling error-chain v0.12.2
[INFO] [stderr]     Checking futf v0.1.4
[INFO] [stderr]     Checking phf_shared v0.8.0
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand_jitter v0.1.4
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]     Checking unicode-normalization v0.1.12
[INFO] [stderr]     Checking gitignore v1.0.6
[INFO] [stderr]    Compiling serde v1.0.111
[INFO] [stderr]     Checking walkdir v2.3.1
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]     Checking toml v0.5.1
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking phf v0.8.0
[INFO] [stderr]     Checking string_cache v0.8.0
[INFO] [stderr]     Checking base64 v0.9.3
[INFO] [stderr]     Checking tendril v0.4.1
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]     Checking aho-corasick v0.7.10
[INFO] [stderr]     Checking combine v3.8.1
[INFO] [stderr]     Checking digest v0.8.1
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]     Checking mime v0.2.6
[INFO] [stderr]    Compiling syn v1.0.14
[INFO] [stderr]    Compiling phf v0.7.24
[INFO] [stderr]     Checking sha-1 v0.8.2
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling quote v0.6.12
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]     Checking idna v0.2.0
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking net2 v0.2.34
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking backtrace v0.3.48
[INFO] [stderr]     Checking inotify-sys v0.1.3
[INFO] [stderr]     Checking filetime v0.2.10
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking regex v1.3.9
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking pulldown-cmark-to-cmark v4.0.2
[INFO] [stderr]     Checking mio v0.6.22
[INFO] [stderr]     Checking url v1.7.2
[INFO] [stderr]     Checking inotify v0.7.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand_pcg v0.2.1
[INFO] [stderr]     Checking url v2.1.1
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]     Checking chrono v0.4.11
[INFO] [stderr]     Checking hyper v0.10.16
[INFO] [stderr]     Checking mio-extras v2.0.6
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]     Checking notify v4.0.15
[INFO] [stderr]     Checking env_logger v0.6.2
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]    Compiling phf_codegen v0.7.24
[INFO] [stderr]    Compiling mime_guess v1.8.8
[INFO] [stderr]     Checking ws v0.9.1
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]    Compiling phf_generator v0.8.0
[INFO] [stderr]    Compiling phf_codegen v0.8.0
[INFO] [stderr]    Compiling string_cache_codegen v0.5.1
[INFO] [stderr]     Checking iron v0.6.1
[INFO] [stderr]     Checking toml_edit v0.1.5
[INFO] [stderr]     Checking mount v0.4.0
[INFO] [stderr]     Checking staticfile v0.5.0
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling pest_generator v2.1.3
[INFO] [stderr]    Compiling darling_core v0.8.6
[INFO] [stderr]    Compiling rustversion v1.0.2
[INFO] [stderr]    Compiling fehler-macros v1.0.0-alpha.2
[INFO] [stderr]    Compiling html5ever v0.25.1
[INFO] [stderr]    Compiling strum_macros v0.18.0
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling serde_derive v1.0.92
[INFO] [stderr]     Checking handlebars v3.1.0
[INFO] [stderr]    Compiling proc-macro-error v0.4.9
[INFO] [stderr]    Compiling proc-macro-error-attr v0.4.9
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]    Compiling darling_macro v0.8.6
[INFO] [stderr]    Compiling structopt-derive v0.4.4
[INFO] [stderr]     Checking fehler v1.0.0-alpha.2
[INFO] [stderr]    Compiling darling v0.8.6
[INFO] [stderr]    Compiling toml-query_derive v0.9.2
[INFO] [stderr]     Checking structopt v0.3.11
[INFO] [stderr]     Checking toml-query v0.9.2
[INFO] [stderr]    Compiling markup5ever v0.10.0
[INFO] [stderr]     Checking skill-tree v2.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking elasticlunr-rs v2.3.9
[INFO] [stderr]     Checking xml5ever v0.16.1
[INFO] [stderr]     Checking markup5ever_rcdom v0.1.0
[INFO] [stderr]     Checking ammonia v3.1.0
[INFO] [stderr]     Checking mdbook v0.3.7
[INFO] [stderr]     Checking mdbook-skill-tree v2.0.0 (/opt/rustwide/workdir/mdbook-skill-tree)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2m 06s
[INFO] running `Command { std: "docker" "inspect" "34fc13e1ffbbdd383475a93dca6d7ac59a47b748728f673d6311c5eaf082369d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "34fc13e1ffbbdd383475a93dca6d7ac59a47b748728f673d6311c5eaf082369d", kill_on_drop: false }`
[INFO] [stdout] 34fc13e1ffbbdd383475a93dca6d7ac59a47b748728f673d6311c5eaf082369d