[INFO] cloning repository https://github.com/mattrayner/learning-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mattrayner/learning-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmattrayner%2Flearning-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmattrayner%2Flearning-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 76a51d5948e6b4b3829eb649b52bf0496266591f
[INFO] testing mattrayner/learning-rust against beta-2021-01-01 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmattrayner%2Flearning-rust" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mattrayner/learning-rust on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mattrayner/learning-rust
[INFO] finished tweaking git repo https://github.com/mattrayner/learning-rust
[INFO] tweaked toml for git repo https://github.com/mattrayner/learning-rust written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/mattrayner/learning-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded fuchsia-zircon v0.3.3
[INFO] [stderr]   Downloaded rand v0.4.2
[INFO] [stderr]   Downloaded bitflags v1.0.1
[INFO] [stderr]   Downloaded fuchsia-zircon-sys v0.3.3
[INFO] [stderr]   Downloaded winapi v0.3.4
[INFO] [stderr]   Downloaded libc v0.2.38
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 39fde53405f9a536f2c8b1e44e3b486b1f662e7499a701fc14be16b45705acfb
[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" "39fde53405f9a536f2c8b1e44e3b486b1f662e7499a701fc14be16b45705acfb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "39fde53405f9a536f2c8b1e44e3b486b1f662e7499a701fc14be16b45705acfb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39fde53405f9a536f2c8b1e44e3b486b1f662e7499a701fc14be16b45705acfb", kill_on_drop: false }`
[INFO] [stdout] 39fde53405f9a536f2c8b1e44e3b486b1f662e7499a701fc14be16b45705acfb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 65b5003c0178b0aa135af631ca0cb2956b870ea45dfce9b6edbdfc395a59ffeb
[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" "65b5003c0178b0aa135af631ca0cb2956b870ea45dfce9b6edbdfc395a59ffeb", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.38
[INFO] [stderr]    Compiling rand v0.4.2
[INFO] [stderr]    Compiling learning-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/control_flow.rs:65:6
[INFO] [stdout]    |
[INFO] [stdout] 65 |     1...999 => "unknown", // A range with three dots is INCLUSIVE of the right hand side
[INFO] [stdout]    |      ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]  --> src/data_structures/pattern_matching.rs:8:10
[INFO] [stdout]   |
[INFO] [stdout] 8 |     z @ 9...11 => "lots",
[INFO] [stdout]   |          ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/traits.rs:147:21
[INFO] [stdout]     |
[INFO] [stdout] 147 | fn print_it_too(z: &Printable) {
[INFO] [stdout]     |                     ^^^^^^^^^ help: use `dyn`: `dyn Printable`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/traits.rs:190:16
[INFO] [stdout]     |
[INFO] [stdout] 190 |   let shapes:[&Shape; 4] = [
[INFO] [stdout]     |                ^^^^^ help: use `dyn`: `dyn Shape`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.05s
[INFO] running `Command { std: "docker" "inspect" "65b5003c0178b0aa135af631ca0cb2956b870ea45dfce9b6edbdfc395a59ffeb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "65b5003c0178b0aa135af631ca0cb2956b870ea45dfce9b6edbdfc395a59ffeb", kill_on_drop: false }`
[INFO] [stdout] 65b5003c0178b0aa135af631ca0cb2956b870ea45dfce9b6edbdfc395a59ffeb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 244696f1090a008ed8b3b15598cdefd6d399a9d883c394b53f2f7eefb2e474b8
[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" "244696f1090a008ed8b3b15598cdefd6d399a9d883c394b53f2f7eefb2e474b8", kill_on_drop: false }`
[INFO] [stderr]    Compiling learning-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/control_flow.rs:65:6
[INFO] [stdout]    |
[INFO] [stdout] 65 |     1...999 => "unknown", // A range with three dots is INCLUSIVE of the right hand side
[INFO] [stdout]    |      ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]  --> src/data_structures/pattern_matching.rs:8:10
[INFO] [stdout]   |
[INFO] [stdout] 8 |     z @ 9...11 => "lots",
[INFO] [stdout]   |          ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/traits.rs:147:21
[INFO] [stdout]     |
[INFO] [stdout] 147 | fn print_it_too(z: &Printable) {
[INFO] [stdout]     |                     ^^^^^^^^^ help: use `dyn`: `dyn Printable`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/traits.rs:190:16
[INFO] [stdout]     |
[INFO] [stdout] 190 |   let shapes:[&Shape; 4] = [
[INFO] [stdout]     |                ^^^^^ help: use `dyn`: `dyn Shape`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.42s
[INFO] running `Command { std: "docker" "inspect" "244696f1090a008ed8b3b15598cdefd6d399a9d883c394b53f2f7eefb2e474b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "244696f1090a008ed8b3b15598cdefd6d399a9d883c394b53f2f7eefb2e474b8", kill_on_drop: false }`
[INFO] [stdout] 244696f1090a008ed8b3b15598cdefd6d399a9d883c394b53f2f7eefb2e474b8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 05df2ec45d4bd094aa298fa1b8b92b61908c5ff6a427ecade62d28b12dc00ce7
[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" "05df2ec45d4bd094aa298fa1b8b92b61908c5ff6a427ecade62d28b12dc00ce7", kill_on_drop: false }`
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]   --> src/control_flow.rs:65:6
[INFO] [stderr]    |
[INFO] [stderr] 65 |     1...999 => "unknown", // A range with three dots is INCLUSIVE of the right hand side
[INFO] [stderr]    |      ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]  --> src/data_structures/pattern_matching.rs:8:10
[INFO] [stderr]   |
[INFO] [stderr] 8 |     z @ 9...11 => "lots",
[INFO] [stderr]   |          ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/traits.rs:147:21
[INFO] [stderr]     |
[INFO] [stderr] 147 | fn print_it_too(z: &Printable) {
[INFO] [stderr]     |                     ^^^^^^^^^ help: use `dyn`: `dyn Printable`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/traits.rs:190:16
[INFO] [stderr]     |
[INFO] [stderr] 190 |   let shapes:[&Shape; 4] = [
[INFO] [stderr]     |                ^^^^^ help: use `dyn`: `dyn Shape`
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/learning_rust-f11837cdecfe402f
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "05df2ec45d4bd094aa298fa1b8b92b61908c5ff6a427ecade62d28b12dc00ce7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05df2ec45d4bd094aa298fa1b8b92b61908c5ff6a427ecade62d28b12dc00ce7", kill_on_drop: false }`
[INFO] [stdout] 05df2ec45d4bd094aa298fa1b8b92b61908c5ff6a427ecade62d28b12dc00ce7