[INFO] crate ramp 0.5.7 is already in cache
[INFO] testing ramp-0.5.7 against 1.44.0 for beta-1.45-1
[INFO] extracting crate ramp 0.5.7 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate ramp 0.5.7 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 ramp 0.5.7
[INFO] finished tweaking crates.io crate ramp 0.5.7
[INFO] tweaked toml for crates.io crate ramp 0.5.7 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate ramp 0.5.7 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] 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=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] f7d580da4a46fe22419f7f213f3c32e73bd9b923195c3e530106c16ec436959a
[INFO] running `"docker" "start" "-a" "f7d580da4a46fe22419f7f213f3c32e73bd9b923195c3e530106c16ec436959a"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling libc v0.2.29
[INFO] [stderr]    Compiling num-traits v0.1.40
[INFO] [stderr]    Compiling rustc-cfg v0.2.0
[INFO] [stderr]    Compiling cc v1.0.17
[INFO] [stderr]    Compiling rand_core v0.2.1
[INFO] [stderr]    Compiling ieee754 v0.2.2
[INFO] [stderr]    Compiling hamming v0.1.3
[INFO] [stderr]    Compiling rand v0.3.16
[INFO] [stderr]    Compiling rand v0.5.4
[INFO] [stderr]    Compiling num-integer v0.1.35
[INFO] [stderr]    Compiling num-bigint v0.1.40
[INFO] [stderr]    Compiling ramp v0.5.7 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]   --> src/lib.rs:18:1
[INFO] [stderr]    |
[INFO] [stderr] 18 | #![feature(core_intrinsics, asm, allocator_api)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]   --> src/lib.rs:19:1
[INFO] [stderr]    |
[INFO] [stderr] 19 | #![feature(step_trait, ptr_internals, raw_vec_internals)]
[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/ll/limb.rs:438:17
[INFO] [stderr]     |
[INFO] [stderr] 438 |                 asm!("mulq $3"
[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/ll/limb.rs:522:17
[INFO] [stderr]     |
[INFO] [stderr] 522 |                 asm!("addq $4, $0
[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/ll/limb.rs:582:17
[INFO] [stderr]     |
[INFO] [stderr] 582 |                 asm!("subq $4, $0
[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/ll/limb.rs:649:17
[INFO] [stderr]     |
[INFO] [stderr] 649 |                 asm!("divq $4"
[INFO] [stderr]     |                 ^^^ help: replace the use of the deprecated item: `llvm_asm`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no function or associated item named `dangling` found for struct `std::ptr::Unique<_>` in the current scope
[INFO] [stderr]     --> src/int.rs:3624:26
[INFO] [stderr]      |
[INFO] [stderr] 3624 |             ptr: Unique::dangling(),
[INFO] [stderr]      |                          ^^^^^^^^ function or associated item not found in `std::ptr::Unique<_>`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors; 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0554, E0599.
[INFO] [stderr] For more information about an error, try `rustc --explain E0554`.
[INFO] [stderr] error: could not compile `ramp`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "f7d580da4a46fe22419f7f213f3c32e73bd9b923195c3e530106c16ec436959a"`
[INFO] running `"docker" "rm" "-f" "f7d580da4a46fe22419f7f213f3c32e73bd9b923195c3e530106c16ec436959a"`
[INFO] [stdout] f7d580da4a46fe22419f7f213f3c32e73bd9b923195c3e530106c16ec436959a