[INFO] cloning repository https://github.com/Lucerna-Lang/Lucerna
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Lucerna-Lang/Lucerna" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLucerna-Lang%2FLucerna", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLucerna-Lang%2FLucerna'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c84f2ef65c3fdb6b9a5ecdd6d5ff07ca56091560
[INFO] testing Lucerna-Lang/Lucerna against 1.59.0 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLucerna-Lang%2FLucerna" "/workspace/builds/worker-11/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Lucerna-Lang/Lucerna on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Lucerna-Lang/Lucerna
[INFO] finished tweaking git repo https://github.com/Lucerna-Lang/Lucerna
[INFO] tweaked toml for git repo https://github.com/Lucerna-Lang/Lucerna written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 446143edb2ef97f1a7fe5c5fc324b17db785429b446a65a2f3720ff52d4bbf17
[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" "446143edb2ef97f1a7fe5c5fc324b17db785429b446a65a2f3720ff52d4bbf17", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "446143edb2ef97f1a7fe5c5fc324b17db785429b446a65a2f3720ff52d4bbf17", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "446143edb2ef97f1a7fe5c5fc324b17db785429b446a65a2f3720ff52d4bbf17", kill_on_drop: false }`
[INFO] [stdout] 446143edb2ef97f1a7fe5c5fc324b17db785429b446a65a2f3720ff52d4bbf17
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2a5971ba4b67a3b8f39461b87e0e6c102c0e254925b63d0d0554cf24eb66912f
[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" "2a5971ba4b67a3b8f39461b87e0e6c102c0e254925b63d0d0554cf24eb66912f", kill_on_drop: false }`
[INFO] [stderr]    Compiling futures-task v0.3.21
[INFO] [stderr]    Compiling futures-util v0.3.21
[INFO] [stderr]    Compiling futures-io v0.3.21
[INFO] [stderr]    Compiling structures v5.0.0 (/opt/rustwide/workdir/Structures)
[INFO] [stderr]    Compiling num_cpus v1.13.1
[INFO] [stderr]    Compiling tracing v0.1.31
[INFO] [stderr]    Compiling serde_urlencoded v0.7.1
[INFO] [stderr]    Compiling winres v0.1.12
[INFO] [stdout] warning: value assigned to `found` is never read
[INFO] [stdout]   --> Structures/src/tokenizer.rs:75:13
[INFO] [stdout]    |
[INFO] [stdout] 75 |     let mut found = None;
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `exit_val`
[INFO] [stdout]  --> Structures/src/structs/bridge/env.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     exit_val: Option<String>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `remove`
[INFO] [stdout]   --> Structures/src/structs/bridge/table.rs:21:12
[INFO] [stdout]    |
[INFO] [stdout] 21 |     pub fn remove(&mut self, k: String) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `data`
[INFO] [stdout]  --> Structures/src/structs/bridge/statement.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     pub(super) data: Option<String>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> Structures/src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(allocator_api)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `structures` due to 2 previous errors; 4 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "2a5971ba4b67a3b8f39461b87e0e6c102c0e254925b63d0d0554cf24eb66912f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a5971ba4b67a3b8f39461b87e0e6c102c0e254925b63d0d0554cf24eb66912f", kill_on_drop: false }`
[INFO] [stdout] 2a5971ba4b67a3b8f39461b87e0e6c102c0e254925b63d0d0554cf24eb66912f