[INFO] updating cached repository https://github.com/kylegalloway/blog_os
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 1f691e93dc7bc6b0a8e8f7d4e169d82a53312530
[INFO] checking kylegalloway/blog_os against try#d7b51666469c792a8a3f40849607739bae1e705e for pr-71665
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkylegalloway%2Fblog_os" "/workspace/builds/worker-14/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kylegalloway/blog_os on toolchain d7b51666469c792a8a3f40849607739bae1e705e
[INFO] running `"/workspace/cargo-home/bin/cargo" "+d7b51666469c792a8a3f40849607739bae1e705e" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/kylegalloway/blog_os
[INFO] finished tweaking git repo https://github.com/kylegalloway/blog_os
[INFO] tweaked toml for git repo https://github.com/kylegalloway/blog_os written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/kylegalloway/blog_os already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+d7b51666469c792a8a3f40849607739bae1e705e" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+d7b51666469c792a8a3f40849607739bae1e705e" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f28a648e7b99bf8cb241fc47a0acaafc364e5c58de61f7b8f04ac8a36b2bda75
[INFO] running `"docker" "start" "-a" "f28a648e7b99bf8cb241fc47a0acaafc364e5c58de61f7b8f04ac8a36b2bda75"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling unicode-width v0.1.5
[INFO] [stderr]    Compiling remove_dir_all v0.5.1
[INFO] [stderr]     Checking volatile v0.2.5
[INFO] [stderr]     Checking x86_64 v0.2.14
[INFO] [stderr]     Checking array-init v0.0.4
[INFO] [stderr]     Checking array-init v0.0.3
[INFO] [stderr]     Checking lazy_static v1.2.0
[INFO] [stderr]     Checking uart_16550 v0.1.0
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling raw-cpuid v6.1.0
[INFO] [stderr]    Compiling getopts v0.2.18
[INFO] [stderr]    Compiling pulldown-cmark v0.0.3
[INFO] [stderr]    Compiling tempdir v0.3.7
[INFO] [stderr]    Compiling skeptic v0.5.0
[INFO] [stderr]    Compiling fixedvec v0.2.3
[INFO] [stderr]     Checking x86_64 v0.4.1
[INFO] [stderr]     Checking bootloader v0.3.12
[INFO] [stderr]     Checking blog_os v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: the item `Box` is imported redundantly
[INFO] [stderr]    --> src/vga_buffer.rs:208:13
[INFO] [stderr]     |
[INFO] [stderr] 208 |         use std::boxed::Box;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 22.53s
[INFO] running `"docker" "inspect" "f28a648e7b99bf8cb241fc47a0acaafc364e5c58de61f7b8f04ac8a36b2bda75"`
[INFO] running `"docker" "rm" "-f" "f28a648e7b99bf8cb241fc47a0acaafc364e5c58de61f7b8f04ac8a36b2bda75"`
[INFO] [stdout] f28a648e7b99bf8cb241fc47a0acaafc364e5c58de61f7b8f04ac8a36b2bda75