[INFO] fetching crate x86 0.37.0...
[INFO] checking x86-0.37.0 against master#4fa76a4a7742bb9c1febe33019f5a9e7e4839a65 for pr-83744
[INFO] extracting crate x86 0.37.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate x86 0.37.0 on toolchain 4fa76a4a7742bb9c1febe33019f5a9e7e4839a65
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate x86 0.37.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate x86 0.37.0
[INFO] tweaked toml for crates.io crate x86 0.37.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] da32711b4858733b5c89c0dee8dfee37fecde01e3579519c4197b9a7a79705ed
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "da32711b4858733b5c89c0dee8dfee37fecde01e3579519c4197b9a7a79705ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "da32711b4858733b5c89c0dee8dfee37fecde01e3579519c4197b9a7a79705ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "da32711b4858733b5c89c0dee8dfee37fecde01e3579519c4197b9a7a79705ed", kill_on_drop: false }`
[INFO] [stdout] da32711b4858733b5c89c0dee8dfee37fecde01e3579519c4197b9a7a79705ed
[INFO] running `Command { std: "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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 25979a16a1119daef06c42c0ef7cab9b702a435d4e299577f2b2bf0ec227921d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "25979a16a1119daef06c42c0ef7cab9b702a435d4e299577f2b2bf0ec227921d", kill_on_drop: false }`
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling cc v1.0.67
[INFO] [stderr]     Checking bit_field v0.10.1
[INFO] [stderr]    Compiling heapless v0.5.6
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling x86 v0.32.0
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]    Compiling x86 v0.37.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking termcodes v0.0.1
[INFO] [stderr]    Compiling generic-array v0.14.4
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking hash32 v0.1.1
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking raw-cpuid v9.0.0
[INFO] [stderr]     Checking as-slice v0.1.5
[INFO] [stderr]    Compiling raw-cpuid v7.0.4
[INFO] [stdout] warning: reference to packed field is unaligned
[INFO] [stdout]   --> src/dtables.rs:53:64
[INFO] [stdout]    |
[INFO] [stdout] 53 |         unsafe { write!(f, "DescriptorTablePointer ({} {:?})", self.limit, self.base) }
[INFO] [stdout]    |                                                                ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unaligned_references)]` on by default
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #82523 <https://github.com/rust-lang/rust/issues/82523>
[INFO] [stdout]    = note: fields of packed structs are not properly aligned, and creating a misaligned reference is undefined behavior (even if that reference is never dereferenced)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: reference to packed field is unaligned
[INFO] [stdout]   --> src/dtables.rs:53:76
[INFO] [stdout]    |
[INFO] [stdout] 53 |         unsafe { write!(f, "DescriptorTablePointer ({} {:?})", self.limit, self.base) }
[INFO] [stdout]    |                                                                            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #82523 <https://github.com/rust-lang/rust/issues/82523>
[INFO] [stdout]    = note: fields of packed structs are not properly aligned, and creating a misaligned reference is undefined behavior (even if that reference is never dereferenced)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]   --> src/dtables.rs:53:9
[INFO] [stdout]    |
[INFO] [stdout] 53 |         unsafe { write!(f, "DescriptorTablePointer ({} {:?})", self.limit, self.base) }
[INFO] [stdout]    |         ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_unsafe)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking klogger v0.0.6
[INFO] [stdout] error[E0463]: can't find crate for `x86test`
[INFO] [stdout]   --> tests/kvm/bin.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | extern crate x86test;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `x86`
[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] [stdout] warning: reference to packed field is unaligned
[INFO] [stdout]   --> src/dtables.rs:53:64
[INFO] [stdout]    |
[INFO] [stdout] 53 |         unsafe { write!(f, "DescriptorTablePointer ({} {:?})", self.limit, self.base) }
[INFO] [stdout]    |                                                                ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unaligned_references)]` on by default
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #82523 <https://github.com/rust-lang/rust/issues/82523>
[INFO] [stdout]    = note: fields of packed structs are not properly aligned, and creating a misaligned reference is undefined behavior (even if that reference is never dereferenced)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: reference to packed field is unaligned
[INFO] [stdout]   --> src/dtables.rs:53:76
[INFO] [stdout]    |
[INFO] [stdout] 53 |         unsafe { write!(f, "DescriptorTablePointer ({} {:?})", self.limit, self.base) }
[INFO] [stdout]    |                                                                            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #82523 <https://github.com/rust-lang/rust/issues/82523>
[INFO] [stdout]    = note: fields of packed structs are not properly aligned, and creating a misaligned reference is undefined behavior (even if that reference is never dereferenced)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]   --> src/dtables.rs:53:9
[INFO] [stdout]    |
[INFO] [stdout] 53 |         unsafe { write!(f, "DescriptorTablePointer ({} {:?})", self.limit, self.base) }
[INFO] [stdout]    |         ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_unsafe)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "25979a16a1119daef06c42c0ef7cab9b702a435d4e299577f2b2bf0ec227921d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "25979a16a1119daef06c42c0ef7cab9b702a435d4e299577f2b2bf0ec227921d", kill_on_drop: false }`
[INFO] [stdout] 25979a16a1119daef06c42c0ef7cab9b702a435d4e299577f2b2bf0ec227921d