[INFO] updating cached repository Givup/rust_cards
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Givup/rust_cards
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Givup/rust_cards" "work/ex/beta-1.38-1/sources/1.37.0/gh/Givup/rust_cards"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/Givup/rust_cards'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Givup/rust_cards" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Givup/rust_cards"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Givup/rust_cards'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a6d4bef1eaaedb28667fba36273a812bd1db3ff4
[INFO] sha for GitHub repo Givup/rust_cards: a6d4bef1eaaedb28667fba36273a812bd1db3ff4
[INFO] validating manifest of Givup/rust_cards on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of Givup/rust_cards on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing Givup/rust_cards
[INFO] finished frobbing Givup/rust_cards
[INFO] frobbed toml for Givup/rust_cards written to work/ex/beta-1.38-1/sources/1.37.0/gh/Givup/rust_cards/Cargo.toml
[INFO] started frobbing Givup/rust_cards
[INFO] finished frobbing Givup/rust_cards
[INFO] frobbed toml for Givup/rust_cards written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Givup/rust_cards/Cargo.toml
[INFO] crate Givup/rust_cards already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Updating git repository `https://github.com/Givup/rust_networking`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/Givup/rust_cards/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Updating git repository `https://github.com/Givup/rust_networking`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Updating git repository `https://github.com/Givup/rust_networking`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing Givup/rust_cards against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Givup/rust_cards:/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=warn" "-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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 44c3ae58d575a76674336e02b9cf4f52c423188d4449f034bca841f22a70344e
[INFO] running `"docker" "start" "-a" "44c3ae58d575a76674336e02b9cf4f52c423188d4449f034bca841f22a70344e"`
[INFO] [stderr]    Compiling proc-macro2 v1.0.1
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.3
[INFO] [stderr]    Compiling ryu v1.0.0
[INFO] [stderr]    Compiling serde v1.0.99
[INFO] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling itoa v0.4.4
[INFO] [stderr]    Compiling json v0.11.15
[INFO] [stderr]    Compiling pool_barrier v0.1.1
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling rand v0.5.6
[INFO] [stderr]    Compiling serde_derive v1.0.99
[INFO] [stderr]    Compiling serde_json v1.0.40
[INFO] [stderr]    Compiling rust_networking v0.1.0 (https://github.com/Givup/rust_networking#910c2ba8)
[INFO] [stderr]    Compiling rust_cards v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error: expected identifier, found keyword `return`
[INFO] [stderr]    --> src/client/mod.rs:132:8
[INFO] [stderr]     |
[INFO] [stderr] 132 |                 return;
[INFO] [stderr]     |                 ^^^^^^ expected identifier, found keyword
[INFO] [stderr] help: you can escape reserved keywords to use them as identifiers
[INFO] [stderr]     |
[INFO] [stderr] 132 |                 r#return;
[INFO] [stderr]     |                 ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/thread_pool.rs:8:16
[INFO] [stderr]   |
[INFO] [stderr] 8 | type Job = Box<FnBox + Send + 'static>;
[INFO] [stderr]   |                ^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnBox + Send + 'static`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `deck::Deck`
[INFO] [stderr]   --> src/server/mod.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 | use deck::Deck;
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no function or associated item named `return` found for type `client::request_builder::RequestBuilder` in the current scope
[INFO] [stderr]    --> src/client/mod.rs:132:8
[INFO] [stderr]     |
[INFO] [stderr] 132 |                 return;
[INFO] [stderr]     |                 ^^^^^^ function or associated item not found in `client::request_builder::RequestBuilder`
[INFO] [stderr]     | 
[INFO] [stderr]    ::: src/client/request_builder.rs:3:1
[INFO] [stderr]     |
[INFO] [stderr] 3   | pub struct RequestBuilder;
[INFO] [stderr]     | -------------------------- function or associated item `return` not found for this
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no function or associated item named `new` found for type `client::request_builder::RequestBuilderExit` in the current scope
[INFO] [stderr]   --> src/client/request_builder.rs:16:29
[INFO] [stderr]    |
[INFO] [stderr] 16 |         RequestBuilderExit::new()
[INFO] [stderr]    |                             ^^^ function or associated item not found in `client::request_builder::RequestBuilderExit`
[INFO] [stderr] ...
[INFO] [stderr] 21 | pub struct RequestBuilderExit;
[INFO] [stderr]    | ------------------------------ function or associated item `new` not found for this
[INFO] [stderr]    |
[INFO] [stderr]    = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stderr]    = note: the following trait defines an item `new`, perhaps you need to implement it:
[INFO] [stderr]            candidate #1: `rand::distributions::uniform::UniformSampler`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0599`.
[INFO] [stderr] error: Could not compile `rust_cards`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "44c3ae58d575a76674336e02b9cf4f52c423188d4449f034bca841f22a70344e"`
[INFO] running `"docker" "rm" "-f" "44c3ae58d575a76674336e02b9cf4f52c423188d4449f034bca841f22a70344e"`
[INFO] [stdout] 44c3ae58d575a76674336e02b9cf4f52c423188d4449f034bca841f22a70344e