[INFO] updating cached repository https://github.com/ceckenrode/lol-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] 8aa1afbc8e6df04437530f3338c65a182dc85c2a
[INFO] checking ceckenrode/lol-os against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fceckenrode%2Flol-os" "/workspace/builds/worker-11/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ceckenrode/lol-os on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/ceckenrode/lol-os
[INFO] finished tweaking git repo https://github.com/ceckenrode/lol-os
[INFO] tweaked toml for git repo https://github.com/ceckenrode/lol-os written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/ceckenrode/lol-os already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"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" "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" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "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] f468543ad3aacb2894a79e452d182c00c46548a3d594e6c811be8e096c0562e9
[INFO] running `"docker" "start" "-a" "f468543ad3aacb2894a79e452d182c00c46548a3d594e6c811be8e096c0562e9"`
[INFO] [stderr]    Compiling remove_dir_all v0.5.1
[INFO] [stderr]     Checking nodrop v0.1.13
[INFO] [stderr]     Checking os_bootinfo v0.2.1
[INFO] [stderr]     Checking usize_conversions v0.2.0
[INFO] [stderr]     Checking bitflags v1.0.4
[INFO] [stderr]     Checking ux v0.1.3
[INFO] [stderr]     Checking zero v0.1.2
[INFO] [stderr]     Checking font8x8 v0.2.4
[INFO] [stderr]    Compiling getopts v0.2.18
[INFO] [stderr]     Checking array-init v0.0.4
[INFO] [stderr]    Compiling libc v0.2.51
[INFO] [stderr]     Checking xmas-elf v0.6.2
[INFO] [stderr]    Compiling pulldown-cmark v0.0.3
[INFO] [stderr]    Compiling rand v0.4.6
[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 v0.3.6
[INFO] [stderr]     Checking bootloader v0.4.0
[INFO] [stderr]     Checking lol_os v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0152]: found duplicate lang item `panic_impl`
[INFO] [stderr]  --> src/main.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | / fn panic(_info: &PanicInfo) -> ! {
[INFO] [stderr] 8 | |     loop {}
[INFO] [stderr] 9 | | }
[INFO] [stderr]   | |_^
[INFO] [stderr]   |
[INFO] [stderr]   = note: the lang item is first defined in crate `std` (which `test` depends on)
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0152`.
[INFO] [stderr] error: could not compile `lol_os`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "f468543ad3aacb2894a79e452d182c00c46548a3d594e6c811be8e096c0562e9"`
[INFO] running `"docker" "rm" "-f" "f468543ad3aacb2894a79e452d182c00c46548a3d594e6c811be8e096c0562e9"`
[INFO] [stdout] f468543ad3aacb2894a79e452d182c00c46548a3d594e6c811be8e096c0562e9