[INFO] updating cached repository https://github.com/XDMAN500/Rust-RomanNumerals
[INFO] running `Command { std: "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", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 88eb1d2a1dbe778b320b7a4595a44ae19b600d2f
[INFO] testing XDMAN500/Rust-RomanNumerals against beta-2020-07-24 for beta-1.46-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FXDMAN500%2FRust-RomanNumerals" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/XDMAN500/Rust-RomanNumerals on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/XDMAN500/Rust-RomanNumerals
[INFO] finished tweaking git repo https://github.com/XDMAN500/Rust-RomanNumerals
[INFO] tweaked toml for git repo https://github.com/XDMAN500/Rust-RomanNumerals written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/XDMAN500/Rust-RomanNumerals already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "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_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b7e0a44091d0cc1f1b11a1e81980c1d7ec41c292fc4e09e7771827e44e6f6bf6
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "b7e0a44091d0cc1f1b11a1e81980c1d7ec41c292fc4e09e7771827e44e6f6bf6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b7e0a44091d0cc1f1b11a1e81980c1d7ec41c292fc4e09e7771827e44e6f6bf6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b7e0a44091d0cc1f1b11a1e81980c1d7ec41c292fc4e09e7771827e44e6f6bf6", kill_on_drop: false }`
[INFO] [stdout] b7e0a44091d0cc1f1b11a1e81980c1d7ec41c292fc4e09e7771827e44e6f6bf6
[INFO] running `Command { std: "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=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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 353b0533690fe59cd5e456dcf8031727890e939d5a9a4a588e854f963d605b4b
[INFO] running `Command { std: "docker" "start" "-a" "353b0533690fe59cd5e456dcf8031727890e939d5a9a4a588e854f963d605b4b", kill_on_drop: false }`
[INFO] [stderr]    Compiling roman-numerals v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `from_decimal`
[INFO] [stdout]   --> src/roman_numerals.rs:24:6
[INFO] [stdout]    |
[INFO] [stdout] 24 |         fn from_decimal<'a>(num: i32) -> Option<&'a RomanDigit> {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.74s
[INFO] running `Command { std: "docker" "inspect" "353b0533690fe59cd5e456dcf8031727890e939d5a9a4a588e854f963d605b4b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "353b0533690fe59cd5e456dcf8031727890e939d5a9a4a588e854f963d605b4b", kill_on_drop: false }`
[INFO] [stdout] 353b0533690fe59cd5e456dcf8031727890e939d5a9a4a588e854f963d605b4b
[INFO] running `Command { std: "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=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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 10d3f97bf94661b9aa1ff864d437291a3026b7a70f9cd949453717fdc73ac56e
[INFO] running `Command { std: "docker" "start" "-a" "10d3f97bf94661b9aa1ff864d437291a3026b7a70f9cd949453717fdc73ac56e", kill_on_drop: false }`
[INFO] [stderr]    Compiling roman-numerals v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `from_decimal`
[INFO] [stdout]   --> src/roman_numerals.rs:24:6
[INFO] [stdout]    |
[INFO] [stdout] 24 |         fn from_decimal<'a>(num: i32) -> Option<&'a RomanDigit> {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.70s
[INFO] running `Command { std: "docker" "inspect" "10d3f97bf94661b9aa1ff864d437291a3026b7a70f9cd949453717fdc73ac56e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "10d3f97bf94661b9aa1ff864d437291a3026b7a70f9cd949453717fdc73ac56e", kill_on_drop: false }`
[INFO] [stdout] 10d3f97bf94661b9aa1ff864d437291a3026b7a70f9cd949453717fdc73ac56e
[INFO] running `Command { std: "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=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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] e44dd7d2e3d53d38b58f8ae0d82320a12fe040fb4d48d3a4ffea2addbc34a94d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "e44dd7d2e3d53d38b58f8ae0d82320a12fe040fb4d48d3a4ffea2addbc34a94d", kill_on_drop: false }`
[INFO] [stderr] warning: associated function is never used: `from_decimal`
[INFO] [stderr]   --> src/roman_numerals.rs:24:6
[INFO] [stderr]    |
[INFO] [stderr] 24 |         fn from_decimal<'a>(num: i32) -> Option<&'a RomanDigit> {
[INFO] [stderr]    |            ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/roman_numerals-dda489f4e5345b59
[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 `Command { std: "docker" "inspect" "e44dd7d2e3d53d38b58f8ae0d82320a12fe040fb4d48d3a4ffea2addbc34a94d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e44dd7d2e3d53d38b58f8ae0d82320a12fe040fb4d48d3a4ffea2addbc34a94d", kill_on_drop: false }`
[INFO] [stdout] e44dd7d2e3d53d38b58f8ae0d82320a12fe040fb4d48d3a4ffea2addbc34a94d