[INFO] cloning repository https://github.com/xvxx/vial-todo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/xvxx/vial-todo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxvxx%2Fvial-todo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxvxx%2Fvial-todo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0ec7cc06b5c1feee1bd72f77d6861cc47288e32a
[INFO] testing xvxx/vial-todo against try#722e1797249a965b6335aebd65d777f917e498f1 for pr-91031
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxvxx%2Fvial-todo" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/xvxx/vial-todo on toolchain 722e1797249a965b6335aebd65d777f917e498f1
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/xvxx/vial-todo
[INFO] finished tweaking git repo https://github.com/xvxx/vial-todo
[INFO] tweaked toml for git repo https://github.com/xvxx/vial-todo written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/xvxx/vial-todo already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ron v0.2.2
[INFO] [stderr]   Downloaded libc-strftime v0.2.0
[INFO] [stderr]   Downloaded vial v0.1.0
[INFO] [stderr]   Downloaded rustbreak v2.0.0-rc3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "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] 1f8892bc0069107162c42f74767497d6cf6f5c369834766b06f396e7c62efa9b
[INFO] running `Command { std: "docker" "start" "-a" "1f8892bc0069107162c42f74767497d6cf6f5c369834766b06f396e7c62efa9b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1f8892bc0069107162c42f74767497d6cf6f5c369834766b06f396e7c62efa9b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f8892bc0069107162c42f74767497d6cf6f5c369834766b06f396e7c62efa9b", kill_on_drop: false }`
[INFO] [stdout] 1f8892bc0069107162c42f74767497d6cf6f5c369834766b06f396e7c62efa9b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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=forbid" "-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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7cd78e061d7a3117cd043e220520976efa86619b0d8c38b3cdc7dc141a5f4b7f
[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" "7cd78e061d7a3117cd043e220520976efa86619b0d8c38b3cdc7dc141a5f4b7f", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.30
[INFO] [stderr]    Compiling serde v1.0.111
[INFO] [stderr]    Compiling vial v0.1.0
[INFO] [stderr]    Compiling percent-encoding v2.1.0
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling backtrace v0.3.48
[INFO] [stderr]    Compiling libc-strftime v0.2.0
[INFO] [stderr]    Compiling threadpool v1.8.1
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling serde_derive v1.0.111
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling failure v0.1.8
[INFO] [stderr]    Compiling ron v0.2.2
[INFO] [stderr]    Compiling rustbreak v2.0.0-rc3
[INFO] [stderr]    Compiling vial-todo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `pop`
[INFO] [stdout]   --> src/db.rs:36:12
[INFO] [stdout]    |
[INFO] [stdout] 36 |     pub fn pop(&self) -> Option<String> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/db.rs:52:21
[INFO] [stdout]    |
[INFO] [stdout] 52 |                     mem::replace(&mut db[id], todo);
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 43.71s
[INFO] running `Command { std: "docker" "inspect" "7cd78e061d7a3117cd043e220520976efa86619b0d8c38b3cdc7dc141a5f4b7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7cd78e061d7a3117cd043e220520976efa86619b0d8c38b3cdc7dc141a5f4b7f", kill_on_drop: false }`
[INFO] [stdout] 7cd78e061d7a3117cd043e220520976efa86619b0d8c38b3cdc7dc141a5f4b7f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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=forbid" "-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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "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] 8da6cfdfa7ba345a4367b1357c7046260db2bfc2c78beabdf5b0ff1b4454d4f1
[INFO] running `Command { std: "docker" "start" "-a" "8da6cfdfa7ba345a4367b1357c7046260db2bfc2c78beabdf5b0ff1b4454d4f1", kill_on_drop: false }`
[INFO] [stderr]    Compiling vial-todo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `pop`
[INFO] [stdout]   --> src/db.rs:36:12
[INFO] [stdout]    |
[INFO] [stdout] 36 |     pub fn pop(&self) -> Option<String> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/db.rs:52:21
[INFO] [stdout]    |
[INFO] [stdout] 52 |                     mem::replace(&mut db[id], todo);
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.98s
[INFO] running `Command { std: "docker" "inspect" "8da6cfdfa7ba345a4367b1357c7046260db2bfc2c78beabdf5b0ff1b4454d4f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8da6cfdfa7ba345a4367b1357c7046260db2bfc2c78beabdf5b0ff1b4454d4f1", kill_on_drop: false }`
[INFO] [stdout] 8da6cfdfa7ba345a4367b1357c7046260db2bfc2c78beabdf5b0ff1b4454d4f1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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=forbid" "-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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] f9309ab23bc7402737c4142e635e9e3bb6afc4e9cba6f13e911eec7d8e424ae7
[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" "f9309ab23bc7402737c4142e635e9e3bb6afc4e9cba6f13e911eec7d8e424ae7", kill_on_drop: false }`
[INFO] [stderr] warning: associated function is never used: `pop`
[INFO] [stderr]   --> src/db.rs:36:12
[INFO] [stderr]    |
[INFO] [stderr] 36 |     pub fn pop(&self) -> Option<String> {
[INFO] [stderr]    |            ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stderr]   --> src/db.rs:52:21
[INFO] [stderr]    |
[INFO] [stderr] 52 |                     mem::replace(&mut db[id], todo);
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stderr] 
[INFO] [stderr] warning: `vial-todo` (bin "vial-todo" test) generated 2 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/vial_todo-73af6b718d95ba90)
[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" "f9309ab23bc7402737c4142e635e9e3bb6afc4e9cba6f13e911eec7d8e424ae7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f9309ab23bc7402737c4142e635e9e3bb6afc4e9cba6f13e911eec7d8e424ae7", kill_on_drop: false }`
[INFO] [stdout] f9309ab23bc7402737c4142e635e9e3bb6afc4e9cba6f13e911eec7d8e424ae7