[INFO] updating cached repository collabook/core
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/collabook/core
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/collabook/core" "work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/collabook/core"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/collabook/core'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/collabook/core" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/collabook/core"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/collabook/core'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 6bfee3de1eb815caafcbb8f5a70fbf8cd90a4152
[INFO] sha for GitHub repo collabook/core: 6bfee3de1eb815caafcbb8f5a70fbf8cd90a4152
[INFO] validating manifest of collabook/core on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of collabook/core on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing collabook/core
[INFO] finished frobbing collabook/core
[INFO] frobbed toml for collabook/core written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/collabook/core/Cargo.toml
[INFO] started frobbing collabook/core
[INFO] finished frobbing collabook/core
[INFO] frobbed toml for collabook/core written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/collabook/core/Cargo.toml
[INFO] crate collabook/core already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking collabook/core against try#266783e4e09e4e9d5307c1c8e695659c58bbcac7 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-4/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/collabook/core:/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=forbid" "-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" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 837d6ab35b121e6bac4e5bf371363df3c7b1e24dedcc397b9184d1a9f934f69c
[INFO] running `"docker" "start" "-a" "837d6ab35b121e6bac4e5bf371363df3c7b1e24dedcc397b9184d1a9f934f69c"`
[INFO] [stderr]    Compiling either v1.5.0
[INFO] [stderr]    Compiling ascii v0.7.1
[INFO] [stderr]    Compiling encoding_rs v0.8.14
[INFO] [stderr]     Checking wkhtmltox-sys v0.1.2
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling libz-sys v1.0.25
[INFO] [stderr]    Compiling libssh2-sys v0.2.11
[INFO] [stderr]    Compiling curl-sys v0.4.16
[INFO] [stderr]    Compiling libgit2-sys v0.7.11
[INFO] [stderr]     Checking app_dirs v1.2.1
[INFO] [stderr]     Checking itertools v0.7.11
[INFO] [stderr]    Compiling serde v1.0.84
[INFO] [stderr]     Checking hostname v0.1.5
[INFO] [stderr]     Checking rand v0.5.5
[INFO] [stderr]     Checking socket2 v0.3.8
[INFO] [stderr]     Checking signal-hook v0.1.7
[INFO] [stderr]     Checking rand v0.4.5
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_os v0.1.1
[INFO] [stderr]     Checking crossbeam-epoch v0.7.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.28
[INFO] [stderr]     Checking tokio-timer v0.2.8
[INFO] [stderr]    Compiling memchr v2.1.2
[INFO] [stderr]     Checking miniz-sys v0.1.11
[INFO] [stderr]     Checking brotli-sys v0.3.2
[INFO] [stderr]     Checking url v1.7.2
[INFO] [stderr]     Checking openssl-sys v0.9.40
[INFO] [stderr]    Compiling native-tls v0.2.2
[INFO] [stderr]     Checking mio v0.6.16
[INFO] [stderr]     Checking futures-cpupool v0.1.8
[INFO] [stderr]     Checking resolv-conf v0.6.2
[INFO] [stderr]    Compiling syn v0.15.24
[INFO] [stderr]    Compiling backtrace v0.3.13
[INFO] [stderr]     Checking flate2 v1.0.6
[INFO] [stderr]     Checking tempdir v0.3.7
[INFO] [stderr]     Checking crossbeam-deque v0.6.3
[INFO] [stderr]     Checking brotli2 v0.3.2
[INFO] [stderr]     Checking thread-id v2.0.0
[INFO] [stderr]    Compiling rand_pcg v0.1.1
[INFO] [stderr]     Checking http v0.1.14
[INFO] [stderr]    Compiling combine v3.0.0-beta.1
[INFO] [stderr]    Compiling nom v4.1.1
[INFO] [stderr]     Checking openssl v0.10.16
[INFO] [stderr]     Checking uuid v0.7.1
[INFO] [stderr]     Checking cookie v0.11.0
[INFO] [stderr]     Checking serde_urlencoded v0.5.4
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]     Checking wkhtmltopdf v0.3.0
[INFO] [stderr]     Checking tokio-codec v0.1.1
[INFO] [stderr]    Compiling rand v0.6.4
[INFO] [stderr]     Checking h2 v0.1.14
[INFO] [stderr]     Checking env_logger v0.5.13
[INFO] [stderr]     Checking crossbeam-channel v0.3.6
[INFO] [stderr]     Checking tokio-reactor v0.1.8
[INFO] [stderr]     Checking tokio-udp v0.1.3
[INFO] [stderr]     Checking tokio-tcp v0.1.3
[INFO] [stderr]     Checking tokio-uds v0.2.5
[INFO] [stderr]     Checking tokio-signal v0.2.7
[INFO] [stderr]     Checking tokio-threadpool v0.1.10
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]    Compiling phf_codegen v0.7.24
[INFO] [stderr]    Compiling synstructure v0.10.1
[INFO] [stderr]    Compiling mime_guess v2.0.0-alpha.6
[INFO] [stderr]    Compiling serde_json v1.0.34
[INFO] [stderr]     Checking tokio-fs v0.1.5
[INFO] [stderr]     Checking tokio v0.1.14
[INFO] [stderr]     Checking hyper v0.12.20
[INFO] [stderr]     Checking hyper-tls v0.3.1
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]    Compiling actix_derive v0.3.2
[INFO] [stderr]    Compiling v_escape_derive v0.2.1
[INFO] [stderr]    Compiling serde_derive v1.0.84
[INFO] [stderr]     Checking reqwest v0.9.8
[INFO] [stderr]     Checking failure v0.1.5
[INFO] [stderr]     Checking v_escape v0.3.2
[INFO] [stderr]     Checking trust-dns-proto v0.6.1
[INFO] [stderr]     Checking trust-dns-proto v0.5.0
[INFO] [stderr]     Checking v_htmlescape v0.3.2
[INFO] [stderr]    Compiling graphql-parser v0.2.0
[INFO] [stderr]     Checking trust-dns-resolver v0.10.2
[INFO] [stderr]     Checking actix v0.7.9
[INFO] [stderr]     Checking actix-net v0.2.6
[INFO] [stderr]    Compiling graphql_client_codegen v0.6.0
[INFO] [stderr]     Checking actix-web v0.7.18
[INFO] [stderr]     Checking git2 v0.8.0
[INFO] [stderr]    Compiling graphql_query_derive v0.6.0
[INFO] [stderr]     Checking graphql_client v0.6.0
[INFO] [stderr]     Checking core v0.3.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/book.rs:101:13
[INFO] [stderr]     |
[INFO] [stderr] 101 |         let mut content: Option<String>;
[INFO] [stderr]     |             ----^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/book.rs:101:13
[INFO] [stderr]     |
[INFO] [stderr] 101 |         let mut content: Option<String>;
[INFO] [stderr]     |             ----^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3m 59s
[INFO] running `"docker" "inspect" "837d6ab35b121e6bac4e5bf371363df3c7b1e24dedcc397b9184d1a9f934f69c"`
[INFO] running `"docker" "rm" "-f" "837d6ab35b121e6bac4e5bf371363df3c7b1e24dedcc397b9184d1a9f934f69c"`
[INFO] [stdout] 837d6ab35b121e6bac4e5bf371363df3c7b1e24dedcc397b9184d1a9f934f69c