[INFO] cloning repository https://github.com/Spoonbender/rust-intro-demos
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Spoonbender/rust-intro-demos" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSpoonbender%2Frust-intro-demos", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSpoonbender%2Frust-intro-demos'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7c2c50f1bdf7a50fc484ac7d9f4e74240f24bdd2
[INFO] testing Spoonbender/rust-intro-demos against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSpoonbender%2Frust-intro-demos" "/workspace/builds/worker-13/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Spoonbender/rust-intro-demos on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Spoonbender/rust-intro-demos
[INFO] finished tweaking git repo https://github.com/Spoonbender/rust-intro-demos
[INFO] tweaked toml for git repo https://github.com/Spoonbender/rust-intro-demos written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/Spoonbender/rust-intro-demos already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", 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] 2058f67fe6532e4f58c88ba261ff57eaf03503e2e8378a133f04da5f789ef7ff
[INFO] running `Command { std: "docker" "start" "-a" "2058f67fe6532e4f58c88ba261ff57eaf03503e2e8378a133f04da5f789ef7ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2058f67fe6532e4f58c88ba261ff57eaf03503e2e8378a133f04da5f789ef7ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2058f67fe6532e4f58c88ba261ff57eaf03503e2e8378a133f04da5f789ef7ff", kill_on_drop: false }`
[INFO] [stdout] 2058f67fe6532e4f58c88ba261ff57eaf03503e2e8378a133f04da5f789ef7ff
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7a19fa436255e33fe4821352ccf7fbe1b153a4c060dab41767444ab1ec6fb697
[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" "7a19fa436255e33fe4821352ccf7fbe1b153a4c060dab41767444ab1ec6fb697", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.86
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling time v0.1.43
[INFO] [stderr]    Compiling rand_core v0.6.2
[INFO] [stderr]    Compiling rand_chacha v0.3.0
[INFO] [stderr]    Compiling rand v0.8.3
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling rust-intro-demos v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 18.43s
[INFO] running `Command { std: "docker" "inspect" "7a19fa436255e33fe4821352ccf7fbe1b153a4c060dab41767444ab1ec6fb697", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a19fa436255e33fe4821352ccf7fbe1b153a4c060dab41767444ab1ec6fb697", kill_on_drop: false }`
[INFO] [stdout] 7a19fa436255e33fe4821352ccf7fbe1b153a4c060dab41767444ab1ec6fb697
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "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] a3ccaeac03e0d892645a679f3ac660f10d6cfa27971823b5d20a5e5bb868cd61
[INFO] running `Command { std: "docker" "start" "-a" "a3ccaeac03e0d892645a679f3ac660f10d6cfa27971823b5d20a5e5bb868cd61", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-intro-demos v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `ops::DerefMut`
[INFO] [stdout]  --> examples/shared_state.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     ops::DerefMut,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main2`
[INFO] [stdout]   --> examples/shared_state.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn main2() {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `do_something2`
[INFO] [stdout]   --> examples/errors.rs:23:4
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn do_something2(file_name: &str) -> Result<()> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `do_something3`
[INFO] [stdout]   --> examples/errors.rs:29:4
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn do_something3(file_name: &str) -> Result<()> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 5.01s
[INFO] running `Command { std: "docker" "inspect" "a3ccaeac03e0d892645a679f3ac660f10d6cfa27971823b5d20a5e5bb868cd61", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a3ccaeac03e0d892645a679f3ac660f10d6cfa27971823b5d20a5e5bb868cd61", kill_on_drop: false }`
[INFO] [stdout] a3ccaeac03e0d892645a679f3ac660f10d6cfa27971823b5d20a5e5bb868cd61
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", 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] 0e14c5b1e366f919f5c7452b8fdda8895af78aa3704dfcbd7ef9485d94320218
[INFO] running `Command { std: "docker" "start" "-a" "0e14c5b1e366f919f5c7452b8fdda8895af78aa3704dfcbd7ef9485d94320218", kill_on_drop: false }`
[INFO] [stderr] warning: function is never used: `do_something2`
[INFO] [stderr]   --> examples/errors.rs:23:4
[INFO] [stderr]    |
[INFO] [stderr] 23 | fn do_something2(file_name: &str) -> Result<()> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `do_something3`
[INFO] [stderr]   --> examples/errors.rs:29:4
[INFO] [stderr]    |
[INFO] [stderr] 29 | fn do_something3(file_name: &str) -> Result<()> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `ops::DerefMut`
[INFO] [stderr]  --> examples/shared_state.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 |     ops::DerefMut,
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `main2`
[INFO] [stderr]   --> examples/shared_state.rs:26:4
[INFO] [stderr]    |
[INFO] [stderr] 26 | fn main2() {
[INFO] [stderr]    |    ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `rust-intro-demos` (example "errors") generated 2 warnings
[INFO] [stderr] warning: `rust-intro-demos` (example "shared_state") generated 2 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rust_intro_demos-bae3c30a2b627f42)
[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" "0e14c5b1e366f919f5c7452b8fdda8895af78aa3704dfcbd7ef9485d94320218", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e14c5b1e366f919f5c7452b8fdda8895af78aa3704dfcbd7ef9485d94320218", kill_on_drop: false }`
[INFO] [stdout] 0e14c5b1e366f919f5c7452b8fdda8895af78aa3704dfcbd7ef9485d94320218