[INFO] updating cached repository https://github.com/pop-os/buildchain
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] cb48b2fd146e659c502814fa2cd70fdfd105d034
[INFO] checking pop-os/buildchain against master#b61e69433951e31f7bd746e22f516a48ad41623b for prs-64470-and-65389
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpop-os%2Fbuildchain" "/workspace/builds/worker-3/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/pop-os/buildchain on toolchain b61e69433951e31f7bd746e22f516a48ad41623b
[INFO] running `"/workspace/cargo-home/bin/cargo" "+b61e69433951e31f7bd746e22f516a48ad41623b" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/pop-os/buildchain
[INFO] finished tweaking git repo https://github.com/pop-os/buildchain
[INFO] tweaked toml for git repo https://github.com/pop-os/buildchain written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/pop-os/buildchain already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+b61e69433951e31f7bd746e22f516a48ad41623b" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+b61e69433951e31f7bd746e22f516a48ad41623b" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 75dc51d7838d3bc386ac3094f6d9d32b88a4137984fffe44643ab1778bb2896d
[INFO] running `"docker" "start" "-a" "75dc51d7838d3bc386ac3094f6d9d32b88a4137984fffe44643ab1778bb2896d"`
[INFO] [stderr]    Compiling cc v1.0.41
[INFO] [stderr]    Compiling serde v1.0.99
[INFO] [stderr]     Checking indexmap v1.1.0
[INFO] [stderr]     Checking index-fixed v0.3.0
[INFO] [stderr]     Checking plain v0.2.3
[INFO] [stderr]     Checking base32 v0.4.0
[INFO] [stderr]     Checking miniz_oxide v0.3.2
[INFO] [stderr]     Checking tokio-executor v0.1.8
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]    Compiling unicase v2.4.0
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]     Checking regex v1.2.1
[INFO] [stderr]    Compiling synstructure v0.10.2
[INFO] [stderr]     Checking sha2 v0.8.0
[INFO] [stderr]     Checking sodalite v0.3.0
[INFO] [stderr]     Checking tokio-reactor v0.1.9
[INFO] [stderr]     Checking tokio-threadpool v0.1.15
[INFO] [stderr]     Checking tokio-current-thread v0.1.6
[INFO] [stderr]     Checking tokio-timer v0.2.11
[INFO] [stderr]    Compiling mime_guess v2.0.1
[INFO] [stderr]     Checking h2 v0.1.26
[INFO] [stderr]     Checking tempdir v0.3.7
[INFO] [stderr]     Checking flate2 v1.0.11
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]     Checking tokio-tcp v0.1.3
[INFO] [stderr]    Compiling openssl-sys v0.9.49
[INFO] [stderr]    Compiling backtrace-sys v0.1.31
[INFO] [stderr]     Checking tokio v0.1.22
[INFO] [stderr]    Compiling openssl v0.10.24
[INFO] [stderr]    Compiling native-tls v0.2.3
[INFO] [stderr]     Checking backtrace v0.3.35
[INFO] [stderr]     Checking error-chain v0.12.1
[INFO] [stderr]     Checking failure v0.1.5
[INFO] [stderr]     Checking publicsuffix v1.5.3
[INFO] [stderr]     Checking hyper v0.12.33
[INFO] [stderr]    Compiling serde_derive v1.0.99
[INFO] [stderr]     Checking hyper-tls v0.3.2
[INFO] [stderr]     Checking serde_json v1.0.40
[INFO] [stderr]     Checking serde_urlencoded v0.5.5
[INFO] [stderr]     Checking cookie_store v0.7.0
[INFO] [stderr]     Checking lxd v0.1.8
[INFO] [stderr]     Checking reqwest v0.9.20
[INFO] [stderr]     Checking buildchain v0.4.10 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `Rng`
[INFO] [stderr]    --> src/store.rs:254:16
[INFO] [stderr]     |
[INFO] [stderr] 254 |     use rand::{Rng, OsRng};
[INFO] [stderr]     |                ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'rand::OsRng': import with rand::rngs::OsRng instead
[INFO] [stderr]    --> src/store.rs:254:21
[INFO] [stderr]     |
[INFO] [stderr] 254 |     use rand::{Rng, OsRng};
[INFO] [stderr]     |                     ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'rand::OsRng': import with rand::rngs::OsRng instead
[INFO] [stderr]    --> src/store.rs:317:27
[INFO] [stderr]     |
[INFO] [stderr] 317 |             let mut rng = OsRng::new().unwrap();
[INFO] [stderr]     |                           ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'rand::OsRng': import with rand::rngs::OsRng instead
[INFO] [stderr]    --> src/store.rs:361:27
[INFO] [stderr]     |
[INFO] [stderr] 361 |             let mut rng = OsRng::new().unwrap();
[INFO] [stderr]     |                           ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'rand::OsRng': import with rand::rngs::OsRng instead
[INFO] [stderr]    --> src/store.rs:395:27
[INFO] [stderr]     |
[INFO] [stderr] 395 |             let mut rng = OsRng::new().unwrap();
[INFO] [stderr]     |                           ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'rand::OsRng': import with rand::rngs::OsRng instead
[INFO] [stderr]    --> src/store.rs:431:27
[INFO] [stderr]     |
[INFO] [stderr] 431 |             let mut rng = OsRng::new().unwrap();
[INFO] [stderr]     |                           ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `digest`
[INFO] [stderr]    --> src/download.rs:122:20
[INFO] [stderr]     |
[INFO] [stderr] 122 |         for (file, digest) in manifest.files.iter() {
[INFO] [stderr]     |                    ^^^^^^ help: consider prefixing with an underscore: `_digest`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `fill_bytes` found for type `rand::OsRng` in the current scope
[INFO] [stderr]    --> src/store.rs:318:17
[INFO] [stderr]     |
[INFO] [stderr] 318 |             rng.fill_bytes(&mut content);
[INFO] [stderr]     |                 ^^^^^^^^^^ method not found in `rand::OsRng`
[INFO] [stderr]     |
[INFO] [stderr]     = help: items from traits can only be used if the trait is in scope
[INFO] [stderr]     = note: the following trait is implemented but not in scope, perhaps add a `use` for it:
[INFO] [stderr]             `use rand::RngCore;`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `fill_bytes` found for type `rand::OsRng` in the current scope
[INFO] [stderr]    --> src/store.rs:362:17
[INFO] [stderr]     |
[INFO] [stderr] 362 |             rng.fill_bytes(&mut content);
[INFO] [stderr]     |                 ^^^^^^^^^^ method not found in `rand::OsRng`
[INFO] [stderr]     |
[INFO] [stderr]     = help: items from traits can only be used if the trait is in scope
[INFO] [stderr]     = note: the following trait is implemented but not in scope, perhaps add a `use` for it:
[INFO] [stderr]             `use rand::RngCore;`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `fill_bytes` found for type `rand::OsRng` in the current scope
[INFO] [stderr]    --> src/store.rs:396:17
[INFO] [stderr]     |
[INFO] [stderr] 396 |             rng.fill_bytes(&mut block);
[INFO] [stderr]     |                 ^^^^^^^^^^ method not found in `rand::OsRng`
[INFO] [stderr]     |
[INFO] [stderr]     = help: items from traits can only be used if the trait is in scope
[INFO] [stderr]     = note: the following trait is implemented but not in scope, perhaps add a `use` for it:
[INFO] [stderr]             `use rand::RngCore;`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `fill_bytes` found for type `rand::OsRng` in the current scope
[INFO] [stderr]    --> src/store.rs:432:17
[INFO] [stderr]     |
[INFO] [stderr] 432 |             rng.fill_bytes(&mut block);
[INFO] [stderr]     |                 ^^^^^^^^^^ method not found in `rand::OsRng`
[INFO] [stderr]     |
[INFO] [stderr]     = help: items from traits can only be used if the trait is in scope
[INFO] [stderr]     = note: the following trait is implemented but not in scope, perhaps add a `use` for it:
[INFO] [stderr]             `use rand::RngCore;`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 4 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0599`.
[INFO] [stderr] error: could not compile `buildchain`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: field is never used: `signature`
[INFO] [stderr]  --> src/block.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     signature: [u8; 64],
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `public_key`
[INFO] [stderr]   --> src/block.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     public_key: [u8; 32],
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `previous_signature`
[INFO] [stderr]   --> src/block.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     previous_signature: [u8; 64],
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `counter`
[INFO] [stderr]   --> src/block.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     counter: [u8; 8],
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `timestamp`
[INFO] [stderr]   --> src/block.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     timestamp: [u8; 8],
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/store.rs:229:9
[INFO] [stderr]     |
[INFO] [stderr] 229 |         create_dir_if_needed(&pb);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/store.rs:231:9
[INFO] [stderr]     |
[INFO] [stderr] 231 |         create_dir_if_needed(&pb);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "75dc51d7838d3bc386ac3094f6d9d32b88a4137984fffe44643ab1778bb2896d"`
[INFO] running `"docker" "rm" "-f" "75dc51d7838d3bc386ac3094f6d9d32b88a4137984fffe44643ab1778bb2896d"`
[INFO] [stdout] 75dc51d7838d3bc386ac3094f6d9d32b88a4137984fffe44643ab1778bb2896d