[INFO] fetching crate backtrace-rust 0.1.0...
[INFO] testing backtrace-rust-0.1.0 against 1.44.0 for beta-1.45-1
[INFO] extracting crate backtrace-rust 0.1.0 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate backtrace-rust 0.1.0 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 backtrace-rust 0.1.0
[INFO] finished tweaking crates.io crate backtrace-rust 0.1.0
[INFO] tweaked toml for crates.io crate backtrace-rust 0.1.0 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate crates.io crate backtrace-rust 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "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-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7ac2f2f26fdcde07608f2f2597593f25d18cf8626bcd864167f1ca0eea5ca482
[INFO] running `"docker" "start" "-a" "7ac2f2f26fdcde07608f2f2597593f25d18cf8626bcd864167f1ca0eea5ca482"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling target-lexicon v0.10.0
[INFO] [stderr]    Compiling wasmparser v0.54.0
[INFO] [stderr]    Compiling fallible-iterator v0.2.0
[INFO] [stderr]    Compiling stable_deref_trait v1.1.1
[INFO] [stderr]    Compiling parity-wasm v0.41.0
[INFO] [stderr]    Compiling uuid v0.8.1
[INFO] [stderr]    Compiling cpp_demangle v0.2.16
[INFO] [stderr]    Compiling memmap v0.7.0
[INFO] [stderr]    Compiling flate2 v1.0.14
[INFO] [stderr]    Compiling gimli v0.21.0
[INFO] [stderr]    Compiling object v0.19.0
[INFO] [stderr]    Compiling scroll_derive v0.10.1
[INFO] [stderr]    Compiling scroll v0.10.1
[INFO] [stderr]    Compiling goblin v0.1.3
[INFO] [stderr]    Compiling addr2line v0.12.1
[INFO] [stderr]    Compiling object v0.17.0
[INFO] [stderr]    Compiling backtrace-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(asm)]
[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/register.rs:60:9
[INFO] [stderr]    |
[INFO] [stderr] 60 |         asm!("" : "={rsp}"(rsp) : : : "intel")
[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/register.rs:72:9
[INFO] [stderr]    |
[INFO] [stderr] 72 |         asm!("call 1f\n1: pop rax" : "={rax}"(rip) : : : "intel")
[INFO] [stderr]    |         ^^^ help: replace the use of the deprecated item: `llvm_asm`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error; 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: could not compile `backtrace-rust`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "7ac2f2f26fdcde07608f2f2597593f25d18cf8626bcd864167f1ca0eea5ca482"`
[INFO] running `"docker" "rm" "-f" "7ac2f2f26fdcde07608f2f2597593f25d18cf8626bcd864167f1ca0eea5ca482"`
[INFO] [stdout] 7ac2f2f26fdcde07608f2f2597593f25d18cf8626bcd864167f1ca0eea5ca482