[INFO] updating cached repository zrneely/6.857-hw2
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/zrneely/6.857-hw2
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/zrneely/6.857-hw2" "work/ex/beta-1.38-1/sources/1.37.0/gh/zrneely/6.857-hw2"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/zrneely/6.857-hw2'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/zrneely/6.857-hw2" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/zrneely/6.857-hw2"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/zrneely/6.857-hw2'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 58180d9c93c896bd13c47b096d6b762e5be27e75
[INFO] sha for GitHub repo zrneely/6.857-hw2: 58180d9c93c896bd13c47b096d6b762e5be27e75
[INFO] validating manifest of zrneely/6.857-hw2 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 zrneely/6.857-hw2 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 zrneely/6.857-hw2
[INFO] finished frobbing zrneely/6.857-hw2
[INFO] frobbed toml for zrneely/6.857-hw2 written to work/ex/beta-1.38-1/sources/1.37.0/gh/zrneely/6.857-hw2/Cargo.toml
[INFO] started frobbing zrneely/6.857-hw2
[INFO] finished frobbing zrneely/6.857-hw2
[INFO] frobbed toml for zrneely/6.857-hw2 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/zrneely/6.857-hw2/Cargo.toml
[INFO] crate zrneely/6.857-hw2 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] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/zrneely/6.857-hw2/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[INFO] the lockfile is outdated, regenerating it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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 zrneely/6.857-hw2 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-2/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/zrneely/6.857-hw2:/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] dcca5603275432fa1e61fcf971c5f2b71013fd27cbdad5a04a425517226ca095
[INFO] running `"docker" "start" "-a" "dcca5603275432fa1e61fcf971c5f2b71013fd27cbdad5a04a425517226ca095"`
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling arrayvec v0.4.11
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling getrandom v0.1.9
[INFO] [stderr]    Compiling smallvec v0.6.10
[INFO] [stderr]    Compiling futures v0.1.28
[INFO] [stderr]    Compiling gcc v0.3.55
[INFO] [stderr]    Compiling ppv-lite86 v0.2.5
[INFO] [stderr]    Compiling itoa v0.4.4
[INFO] [stderr]    Compiling httparse v1.3.4
[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]    Compiling crossbeam-utils v0.6.6
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand_jitter v0.1.4
[INFO] [stderr]    Compiling memoffset v0.5.1
[INFO] [stderr]    Compiling hyper v0.12.33
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling iovec v0.1.2
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling num_cpus v1.10.1
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling time v0.1.42
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling c2-chacha v0.2.2
[INFO] [stderr]    Compiling crossbeam-queue v0.1.2
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling rand_core v0.5.0
[INFO] [stderr]    Compiling mio v0.6.19
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]    Compiling rand v0.3.23
[INFO] [stderr]    Compiling tokio-executor v0.1.8
[INFO] [stderr]    Compiling tokio-sync v0.1.6
[INFO] [stderr]    Compiling futures-cpupool v0.1.8
[INFO] [stderr]    Compiling want v0.2.0
[INFO] [stderr]    Compiling rand_chacha v0.2.1
[INFO] [stderr]    Compiling tokio-io v0.1.12
[INFO] [stderr]    Compiling http v0.1.18
[INFO] [stderr]    Compiling string v0.2.1
[INFO] [stderr]    Compiling tokio-buf v0.1.1
[INFO] [stderr]    Compiling crossbeam-epoch v0.7.2
[INFO] [stderr]    Compiling tokio-current-thread v0.1.6
[INFO] [stderr]    Compiling tokio-timer v0.2.11
[INFO] [stderr]    Compiling rand v0.7.0
[INFO] [stderr]    Compiling parking_lot_core v0.4.0
[INFO] [stderr]    Compiling crossbeam-deque v0.7.1
[INFO] [stderr]    Compiling parking_lot v0.7.1
[INFO] [stderr]    Compiling tokio-threadpool v0.1.15
[INFO] [stderr]    Compiling tokio-reactor v0.1.9
[INFO] [stderr]    Compiling tokio-tcp v0.1.3
[INFO] [stderr]    Compiling tokio v0.1.22
[INFO] [stderr]    Compiling http-body v0.1.0
[INFO] [stderr]    Compiling h2 v0.1.26
[INFO] [stderr]    Compiling 857miner v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0432]: unresolved imports `rand::distributions::IndependentSample`, `rand::distributions::Range`
[INFO] [stderr]  --> src/worker.rs:2:27
[INFO] [stderr]   |
[INFO] [stderr] 2 | use rand::distributions::{IndependentSample, Range};
[INFO] [stderr]   |                           ^^^^^^^^^^^^^^^^^  ^^^^^ no `Range` in `distributions`
[INFO] [stderr]   |                           |
[INFO] [stderr]   |                           no `IndependentSample` in `distributions`
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `rand::XorShiftRng`
[INFO] [stderr]  --> src/worker.rs:3:42
[INFO] [stderr]   |
[INFO] [stderr] 3 | use rand::{thread_rng, Rng, SeedableRng, XorShiftRng};
[INFO] [stderr]   |                                          ^^^^^^^^^^^ no `XorShiftRng` in the root
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find value `Ok` in crate `hyper`
[INFO] [stderr]    --> src/main.rs:183:42
[INFO] [stderr]     |
[INFO] [stderr] 183 |         assert_eq!(result.status, hyper::Ok);
[INFO] [stderr]     |                                          ^^ not found in `hyper`
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]     |
[INFO] [stderr] 11  | use std::prelude::v1::Ok;
[INFO] [stderr]     |
[INFO] [stderr] 11  | use std::result::Result::Ok;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find value `Ok` in crate `hyper`
[INFO] [stderr]    --> src/main.rs:200:42
[INFO] [stderr]     |
[INFO] [stderr] 200 |         assert_eq!(result.status, hyper::Ok);
[INFO] [stderr]     |                                          ^^ not found in `hyper`
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]     |
[INFO] [stderr] 11  | use std::prelude::v1::Ok;
[INFO] [stderr]     |
[INFO] [stderr] 11  | use std::result::Result::Ok;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error[E0603]: struct `Body` is private
[INFO] [stderr]   --> src/main.rs:14:21
[INFO] [stderr]    |
[INFO] [stderr] 14 | use hyper::client::{Body, Client};
[INFO] [stderr]    |                     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Rng`, `SeedableRng`
[INFO] [stderr]  --> src/worker.rs:3:24
[INFO] [stderr]   |
[INFO] [stderr] 3 | use rand::{thread_rng, Rng, SeedableRng, XorShiftRng};
[INFO] [stderr]   |                        ^^^  ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]    --> src/main.rs:180:35
[INFO] [stderr]     |
[INFO] [stderr] 180 |                              .get(&format!("{}/next", NODE_URL))
[INFO] [stderr]     |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected struct `hyper::Uri`, found reference
[INFO] [stderr]     |
[INFO] [stderr]     = note: expected type `hyper::Uri`
[INFO] [stderr]                found type `&std::string::String`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `send` found for type `hyper::client::ResponseFuture` in the current scope
[INFO] [stderr]    --> src/main.rs:181:31
[INFO] [stderr]     |
[INFO] [stderr] 181 |                              .send()
[INFO] [stderr]     |                               ^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]    --> src/main.rs:197:18
[INFO] [stderr]     |
[INFO] [stderr] 197 |             .get("http://6857coin.csail.mit.edu:8080/block/169740d5c4711f3cbbde6b9bfbbe8b3d236879d849d1c137660fce9e7884cae7")
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected struct `hyper::Uri`, found reference
[INFO] [stderr]     |
[INFO] [stderr]     = note: expected type `hyper::Uri`
[INFO] [stderr]                found type `&'static str`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `send` found for type `hyper::client::ResponseFuture` in the current scope
[INFO] [stderr]    --> src/main.rs:198:14
[INFO] [stderr]     |
[INFO] [stderr] 198 |             .send()
[INFO] [stderr]     |              ^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `post` found for type `hyper::Client<hyper::client::HttpConnector>` in the current scope
[INFO] [stderr]    --> src/main.rs:222:31
[INFO] [stderr]     |
[INFO] [stderr] 222 |                              .post(&format!("{}/add", NODE_URL))
[INFO] [stderr]     |                               ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::Read`
[INFO] [stderr]   --> src/main.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 22 | use std::io::Read;
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 10 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0308, E0425, E0432, E0599, E0603.
[INFO] [stderr] For more information about an error, try `rustc --explain E0308`.
[INFO] [stderr] error: Could not compile `857miner`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "dcca5603275432fa1e61fcf971c5f2b71013fd27cbdad5a04a425517226ca095"`
[INFO] running `"docker" "rm" "-f" "dcca5603275432fa1e61fcf971c5f2b71013fd27cbdad5a04a425517226ca095"`
[INFO] [stdout] dcca5603275432fa1e61fcf971c5f2b71013fd27cbdad5a04a425517226ca095