[INFO] fetching crate const_env--value 0.1.2...
[INFO] checking const_env--value-0.1.2 against beta for pr-78714
[INFO] extracting crate const_env--value 0.1.2 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate const_env--value 0.1.2 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate const_env--value 0.1.2
[INFO] finished tweaking crates.io crate const_env--value 0.1.2
[INFO] tweaked toml for crates.io crate const_env--value 0.1.2 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate const_env--value 0.1.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded const_env_impl--value v0.1.2
[INFO] [stderr]   Downloaded compiletest_rs v0.5.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 36cce4fcce54cd7b9bf7298eaa1f8ccf7356e3ac0a3e9254467adabb2cf53484
[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" "36cce4fcce54cd7b9bf7298eaa1f8ccf7356e3ac0a3e9254467adabb2cf53484", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "36cce4fcce54cd7b9bf7298eaa1f8ccf7356e3ac0a3e9254467adabb2cf53484", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "36cce4fcce54cd7b9bf7298eaa1f8ccf7356e3ac0a3e9254467adabb2cf53484", kill_on_drop: false }`
[INFO] [stdout] 36cce4fcce54cd7b9bf7298eaa1f8ccf7356e3ac0a3e9254467adabb2cf53484
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ad931380f67dd88e3b86219503059e4a27ba738c1fcd2919ca6fc947e1e159a7
[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" "ad931380f67dd88e3b86219503059e4a27ba738c1fcd2919ca6fc947e1e159a7", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.35
[INFO] [stderr]    Compiling serde v1.0.114
[INFO] [stderr]    Compiling compiletest_rs v0.5.0
[INFO] [stderr]     Checking proc-macro2 v1.0.19
[INFO] [stderr]     Checking dirs-sys v0.3.5
[INFO] [stderr]     Checking filetime v0.2.10
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking term v0.6.1
[INFO] [stderr]     Checking quote v1.0.7
[INFO] [stderr]     Checking tester v0.7.0
[INFO] [stderr]     Checking const_env_impl--value v0.1.2
[INFO] [stderr]     Checking const_env--value v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling serde_derive v1.0.114
[INFO] [stderr]     Checking serde_json v1.0.56
[INFO] [stderr]     Checking rustfix v0.5.1
[INFO] [stdout] error: proc macro panicked
[INFO] [stdout]  --> examples/value.rs:6:24
[INFO] [stdout]   |
[INFO] [stdout] 6 | const SMOKE_U32: u32 = value_from_env!("SMOKE_U32": u32);
[INFO] [stdout]   |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: message: no value available for environment variable 'SMOKE_U32'
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `const_env--value`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "ad931380f67dd88e3b86219503059e4a27ba738c1fcd2919ca6fc947e1e159a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad931380f67dd88e3b86219503059e4a27ba738c1fcd2919ca6fc947e1e159a7", kill_on_drop: false }`
[INFO] [stdout] ad931380f67dd88e3b86219503059e4a27ba738c1fcd2919ca6fc947e1e159a7