[INFO] updating cached repository https://github.com/richardbrodie/mercury
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/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] f0ae094a094cfabe1c87c3a1b4a259c0f2629aff
[INFO] testing richardbrodie/mercury against beta-2019-09-28 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Frichardbrodie%2Fmercury" "work/builds/worker-6/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/richardbrodie/mercury on toolchain beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/richardbrodie/mercury
[INFO] finished tweaking git repo https://github.com/richardbrodie/mercury
[INFO] tweaked toml for git repo https://github.com/richardbrodie/mercury written to work/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/richardbrodie/mercury already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-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" "+beta-2019-09-28" "build" "--frozen"`
[INFO] [stdout] 3ed09fb63b1c2b6b82d74c8e6ac94207ba10c538a3368971802e20d4643fec2c
[INFO] running `"docker" "start" "-a" "3ed09fb63b1c2b6b82d74c8e6ac94207ba10c538a3368971802e20d4643fec2c"`
[INFO] [stderr]    Compiling dirs v1.0.4
[INFO] [stderr]    Compiling serde_yaml v0.8.7
[INFO] [stderr]    Compiling syn v0.15.15
[INFO] [stderr]    Compiling pretty_env_logger v0.2.4
[INFO] [stderr]    Compiling synstructure v0.10.1
[INFO] [stderr]    Compiling serde_derive v1.0.80
[INFO] [stderr]    Compiling failure_derive v0.1.3
[INFO] [stderr]    Compiling failure v0.1.3
[INFO] [stderr]    Compiling dotenv v0.13.0
[INFO] [stderr]    Compiling mercury v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `File`
[INFO] [stderr]  --> src/types.rs:3:21
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::fs::{self, File};
[INFO] [stderr]   |                     ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Feed`
[INFO] [stderr]  --> src/types.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub struct Feed {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Item`
[INFO] [stderr]   --> src/types.rs:10:1
[INFO] [stderr]    |
[INFO] [stderr] 10 | pub struct Item {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/types.rs:29:13
[INFO] [stderr]    |
[INFO] [stderr] 29 |             fs::create_dir(&self.feed_path);
[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]     Finished dev [unoptimized + debuginfo] target(s) in 29.33s
[INFO] running `"docker" "inspect" "3ed09fb63b1c2b6b82d74c8e6ac94207ba10c538a3368971802e20d4643fec2c"`
[INFO] running `"docker" "rm" "-f" "3ed09fb63b1c2b6b82d74c8e6ac94207ba10c538a3368971802e20d4643fec2c"`
[INFO] [stdout] 3ed09fb63b1c2b6b82d74c8e6ac94207ba10c538a3368971802e20d4643fec2c
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-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" "+beta-2019-09-28" "test" "--frozen" "--no-run"`
[INFO] [stdout] 9f5af24a5a6319cdf4c0724fe8935603b2848c498a2038e44c4619f037e2842a
[INFO] running `"docker" "start" "-a" "9f5af24a5a6319cdf4c0724fe8935603b2848c498a2038e44c4619f037e2842a"`
[INFO] [stderr]    Compiling mercury v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `File`
[INFO] [stderr]  --> src/types.rs:3:21
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::fs::{self, File};
[INFO] [stderr]   |                     ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Feed`
[INFO] [stderr]  --> src/types.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub struct Feed {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Item`
[INFO] [stderr]   --> src/types.rs:10:1
[INFO] [stderr]    |
[INFO] [stderr] 10 | pub struct Item {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/types.rs:29:13
[INFO] [stderr]    |
[INFO] [stderr] 29 |             fs::create_dir(&self.feed_path);
[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]     Finished dev [unoptimized + debuginfo] target(s) in 1.51s
[INFO] running `"docker" "inspect" "9f5af24a5a6319cdf4c0724fe8935603b2848c498a2038e44c4619f037e2842a"`
[INFO] running `"docker" "rm" "-f" "9f5af24a5a6319cdf4c0724fe8935603b2848c498a2038e44c4619f037e2842a"`
[INFO] [stdout] 9f5af24a5a6319cdf4c0724fe8935603b2848c498a2038e44c4619f037e2842a
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-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" "+beta-2019-09-28" "test" "--frozen"`
[INFO] [stdout] cf2548b8b5ef860a41dd0e3cbc220a7317deba26423621d1d55cccddbfd4552d
[INFO] running `"docker" "start" "-a" "cf2548b8b5ef860a41dd0e3cbc220a7317deba26423621d1d55cccddbfd4552d"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/mercury-33c17f6d3019ccd6
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "cf2548b8b5ef860a41dd0e3cbc220a7317deba26423621d1d55cccddbfd4552d"`
[INFO] running `"docker" "rm" "-f" "cf2548b8b5ef860a41dd0e3cbc220a7317deba26423621d1d55cccddbfd4552d"`
[INFO] [stdout] cf2548b8b5ef860a41dd0e3cbc220a7317deba26423621d1d55cccddbfd4552d