[INFO] crate linux 0.0.1 is already in cache
[INFO] testing linux-0.0.1 against 1.44.0 for beta-1.45-1
[INFO] extracting crate linux 0.0.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate linux 0.0.1 on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate linux 0.0.1
[INFO] finished tweaking crates.io crate linux 0.0.1
[INFO] tweaked toml for crates.io crate linux 0.0.1 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "build" "--frozen"`
[INFO] [stdout] d856aca177a79f0b9c76d6bc2496b06c4eff01905d71333bd23c0f79ea1a69ef
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "d856aca177a79f0b9c76d6bc2496b06c4eff01905d71333bd23c0f79ea1a69ef"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling linux-macros v0.0.1
[INFO] [stderr]    Compiling linux v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr] error: cannot find attribute `structural_match` in this scope
[INFO] [stderr]   --> src/util/error.rs:49:3
[INFO] [stderr]    |
[INFO] [stderr] 49 | #[structural_match]
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(asm, structural_match, read_initializer)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'asm': the syntax of asm! will change soon, use llvm_asm! to avoid breakage
[INFO] [stderr]   --> src/syscall/raw/x86_64.rs:70:9
[INFO] [stderr]    |
[INFO] [stderr] 70 |         asm!("syscall" : "={rax}"(ret)
[INFO] [stderr]    |         ^^^ help: replace the use of the deprecated item: `llvm_asm`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'asm': the syntax of asm! will change soon, use llvm_asm! to avoid breakage
[INFO] [stderr]   --> src/syscall/raw/x86_64.rs:80:9
[INFO] [stderr]    |
[INFO] [stderr] 80 |         asm!("syscall" : "={rax}"(ret)
[INFO] [stderr]    |         ^^^ help: replace the use of the deprecated item: `llvm_asm`
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'asm': the syntax of asm! will change soon, use llvm_asm! to avoid breakage
[INFO] [stderr]   --> src/syscall/raw/x86_64.rs:90:9
[INFO] [stderr]    |
[INFO] [stderr] 90 |         asm!("syscall" : "={rax}"(ret)
[INFO] [stderr]    |         ^^^ help: replace the use of the deprecated item: `llvm_asm`
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'asm': the syntax of asm! will change soon, use llvm_asm! to avoid breakage
[INFO] [stderr]    --> src/syscall/raw/x86_64.rs:100:9
[INFO] [stderr]     |
[INFO] [stderr] 100 |         asm!("syscall" : "={rax}"(ret)
[INFO] [stderr]     |         ^^^ help: replace the use of the deprecated item: `llvm_asm`
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'asm': the syntax of asm! will change soon, use llvm_asm! to avoid breakage
[INFO] [stderr]    --> src/syscall/raw/x86_64.rs:110:9
[INFO] [stderr]     |
[INFO] [stderr] 110 |         asm!("syscall" : "={rax}"(ret)
[INFO] [stderr]     |         ^^^ help: replace the use of the deprecated item: `llvm_asm`
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'asm': the syntax of asm! will change soon, use llvm_asm! to avoid breakage
[INFO] [stderr]    --> src/syscall/raw/x86_64.rs:121:9
[INFO] [stderr]     |
[INFO] [stderr] 121 |         asm!("syscall" : "={rax}"(ret)
[INFO] [stderr]     |         ^^^ help: replace the use of the deprecated item: `llvm_asm`
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'asm': the syntax of asm! will change soon, use llvm_asm! to avoid breakage
[INFO] [stderr]    --> src/syscall/raw/x86_64.rs:133:9
[INFO] [stderr]     |
[INFO] [stderr] 133 |         asm!("syscall" : "={rax}"(ret)
[INFO] [stderr]     |         ^^^ help: replace the use of the deprecated item: `llvm_asm`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors; 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: could not compile `linux`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "d856aca177a79f0b9c76d6bc2496b06c4eff01905d71333bd23c0f79ea1a69ef"`
[INFO] running `"docker" "rm" "-f" "d856aca177a79f0b9c76d6bc2496b06c4eff01905d71333bd23c0f79ea1a69ef"`
[INFO] [stdout] d856aca177a79f0b9c76d6bc2496b06c4eff01905d71333bd23c0f79ea1a69ef