[INFO] cloning repository https://github.com/Baidicoot/modular_vm
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Baidicoot/modular_vm" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBaidicoot%2Fmodular_vm", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBaidicoot%2Fmodular_vm'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bf5118d6974f55416a92f28f6dacc3b4a67054f1
[INFO] testing Baidicoot/modular_vm against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBaidicoot%2Fmodular_vm" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Baidicoot/modular_vm 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/Baidicoot/modular_vm
[INFO] finished tweaking git repo https://github.com/Baidicoot/modular_vm
[INFO] tweaked toml for git repo https://github.com/Baidicoot/modular_vm written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/Baidicoot/modular_vm 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] [stderr] warning: unused manifest key: package.categorys
[INFO] [stderr] warning: unused manifest key: package.license_file
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] 6ff6245425cf497cdb48b55da86e2c1762c3a20c63a3ecc7dc253f419aad898d
[INFO] running `Command { std: "docker" "start" "-a" "6ff6245425cf497cdb48b55da86e2c1762c3a20c63a3ecc7dc253f419aad898d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6ff6245425cf497cdb48b55da86e2c1762c3a20c63a3ecc7dc253f419aad898d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6ff6245425cf497cdb48b55da86e2c1762c3a20c63a3ecc7dc253f419aad898d", kill_on_drop: false }`
[INFO] [stdout] 6ff6245425cf497cdb48b55da86e2c1762c3a20c63a3ecc7dc253f419aad898d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] accdbf3efff32633bc6b34462f845bb4bf88b3db4e4bf2d741a38cd674720a82
[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" "accdbf3efff32633bc6b34462f845bb4bf88b3db4e4bf2d741a38cd674720a82", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: package.categorys
[INFO] [stderr] warning: unused manifest key: package.license_file
[INFO] [stderr]    Compiling modVM v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: crate `modVM` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `mod_vm`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/bin/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(duration_as_u128)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `modVM` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "accdbf3efff32633bc6b34462f845bb4bf88b3db4e4bf2d741a38cd674720a82", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "accdbf3efff32633bc6b34462f845bb4bf88b3db4e4bf2d741a38cd674720a82", kill_on_drop: false }`
[INFO] [stdout] accdbf3efff32633bc6b34462f845bb4bf88b3db4e4bf2d741a38cd674720a82