[INFO] fetching crate libremarkable 0.3.2...
[INFO] checking libremarkable-0.3.2 against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] extracting crate libremarkable 0.3.2 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate libremarkable 0.3.2 on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate libremarkable 0.3.2
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate libremarkable 0.3.2
[INFO] tweaked toml for crates.io crate libremarkable 0.3.2 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"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" "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" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "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] 05f8bac7bf379c0719985426684f501d9ccc8e1ebdc6005b50c0797376a0e587
[INFO] running `"docker" "start" "-a" "05f8bac7bf379c0719985426684f501d9ccc8e1ebdc6005b50c0797376a0e587"`
[INFO] [stderr]     Checking atomic v0.4.5
[INFO] [stderr]     Checking ioctl-gen v0.1.1
[INFO] [stderr]     Checking aabb-quadtree v0.1.0
[INFO] [stderr]     Checking redhook v0.1.2
[INFO] [stderr]    Compiling zstd-sys v1.4.13+zstd.1.4.3
[INFO] [stderr]    Compiling lua52-sys v0.1.2
[INFO] [stderr]     Checking ordered-float v0.5.2
[INFO] [stderr]     Checking epoll v3.1.1
[INFO] [stderr]     Checking png v0.11.0
[INFO] [stderr]     Checking mmap v0.1.1
[INFO] [stderr]     Checking tiny_http v0.6.2
[INFO] [stderr]     Checking stopwatch v0.0.7
[INFO] [stderr]     Checking evdev v0.10.1
[INFO] [stderr]     Checking rusttype v0.4.3
[INFO] [stderr]     Checking image v0.18.0
[INFO] [stderr]     Checking hlua v0.4.1
[INFO] [stderr]     Checking zstd-safe v1.4.13+zstd.1.4.3
[INFO] [stderr]     Checking zstd v0.4.28+zstd.1.4.3
[INFO] [stderr]     Checking libremarkable v0.3.2 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0635]: unknown feature `const_size_of`
[INFO] [stderr]  --> src/lib.rs:2:12
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(const_size_of)]
[INFO] [stderr]   |            ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0635`.
[INFO] [stderr] error: could not compile `libremarkable`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0635]: unknown feature `const_size_of`
[INFO] [stderr]  --> src/lib.rs:2:12
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(const_size_of)]
[INFO] [stderr]   |            ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0635`.
[INFO] [stderr] error: could not compile `libremarkable`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "05f8bac7bf379c0719985426684f501d9ccc8e1ebdc6005b50c0797376a0e587"`
[INFO] running `"docker" "rm" "-f" "05f8bac7bf379c0719985426684f501d9ccc8e1ebdc6005b50c0797376a0e587"`
[INFO] [stdout] 05f8bac7bf379c0719985426684f501d9ccc8e1ebdc6005b50c0797376a0e587