[INFO] fetching crate btrfs 1.2.2...
[INFO] checking btrfs-1.2.2 against master#b0696a5160711c068cb1f01b7437db7990d15750 for pr-121848
[INFO] extracting crate btrfs 1.2.2 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate btrfs 1.2.2 on toolchain b0696a5160711c068cb1f01b7437db7990d15750
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b0696a5160711c068cb1f01b7437db7990d15750" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate btrfs 1.2.2
[INFO] finished tweaking crates.io crate btrfs 1.2.2
[INFO] tweaked toml for crates.io crate btrfs 1.2.2 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b0696a5160711c068cb1f01b7437db7990d15750" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b0696a5160711c068cb1f01b7437db7990d15750" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded minilzo v0.2.0
[INFO] [stderr]   Downloaded crc v1.8.1
[INFO] [stderr]   Downloaded bitflags v0.7.0
[INFO] [stderr]   Downloaded build_const v0.2.2
[INFO] [stderr]   Downloaded minilzo-sys v0.1.0
[INFO] [stderr]   Downloaded flate2 v0.2.20
[INFO] [stderr]   Downloaded uuid v0.5.1
[INFO] [stderr]   Downloaded nix v0.8.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+b0696a5160711c068cb1f01b7437db7990d15750" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 99b678938a806e9845d1b100f891a7db8cda1bf6386fc2c13727f8a6bc3f1301
[INFO] running `Command { std: "docker" "start" "-a" "99b678938a806e9845d1b100f891a7db8cda1bf6386fc2c13727f8a6bc3f1301", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "99b678938a806e9845d1b100f891a7db8cda1bf6386fc2c13727f8a6bc3f1301", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "99b678938a806e9845d1b100f891a7db8cda1bf6386fc2c13727f8a6bc3f1301", kill_on_drop: false }`
[INFO] [stdout] 99b678938a806e9845d1b100f891a7db8cda1bf6386fc2c13727f8a6bc3f1301
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+b0696a5160711c068cb1f01b7437db7990d15750" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 89c5d1f4bdf23c9b064b51d6c0590faeb8fbcdd5a7e05fbb75810fcf0a325e8a
[INFO] running `Command { std: "docker" "start" "-a" "89c5d1f4bdf23c9b064b51d6c0590faeb8fbcdd5a7e05fbb75810fcf0a325e8a", kill_on_drop: false }`
[INFO] [stderr]    Compiling build_const v0.2.2
[INFO] [stderr]     Checking bitflags v0.7.0
[INFO] [stderr]    Compiling miniz-sys v0.1.12
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking uuid v0.5.1
[INFO] [stderr]     Checking lazy_static v0.2.11
[INFO] [stderr]     Checking minilzo-sys v0.1.0
[INFO] [stderr]     Checking nix v0.8.1
[INFO] [stderr]     Checking minilzo v0.2.0
[INFO] [stderr]    Compiling crc v1.8.1
[INFO] [stderr]     Checking flate2 v0.2.20
[INFO] [stderr]     Checking btrfs v1.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]   --> src/lib.rs:10:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | #[ macro_use ]
[INFO] [stdout]    | ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `libc` is imported redundantly
[INFO] [stdout]   --> src/compress/lzo.rs:1:5
[INFO] [stdout]    |
[INFO] [stdout] 1  | use libc;
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:17:1
[INFO] [stdout]    |
[INFO] [stdout] 17 | extern crate libc;
[INFO] [stdout]    | ------------------ the item `libc` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `flate2` is imported redundantly
[INFO] [stdout]   --> src/diskformat/item/extent_data.rs:4:5
[INFO] [stdout]    |
[INFO] [stdout] 4  | use flate2;
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | extern crate flate2;
[INFO] [stdout]    | -------------------- the item `flate2` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `minilzo` is imported redundantly
[INFO] [stdout]   --> src/diskformat/item/extent_data.rs:6:5
[INFO] [stdout]    |
[INFO] [stdout] 6  | use minilzo;
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:19:1
[INFO] [stdout]    |
[INFO] [stdout] 19 | extern crate minilzo;
[INFO] [stdout]    | --------------------- the item `minilzo` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/diskformat/item/extent_data.rs:226:42
[INFO] [stdout]     |
[INFO] [stdout] 226 |                 BTRFS_EXTENT_DATA_LZO_COMPRESSION => try! (
[INFO] [stdout]     |                                                      ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]   --> src/lib.rs:10:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | #[ macro_use ]
[INFO] [stdout]    | ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `libc` is imported redundantly
[INFO] [stdout]   --> src/compress/lzo.rs:1:5
[INFO] [stdout]    |
[INFO] [stdout] 1  | use libc;
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:17:1
[INFO] [stdout]    |
[INFO] [stdout] 17 | extern crate libc;
[INFO] [stdout]    | ------------------ the item `libc` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `flate2` is imported redundantly
[INFO] [stdout]   --> src/diskformat/item/extent_data.rs:4:5
[INFO] [stdout]    |
[INFO] [stdout] 4  | use flate2;
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | extern crate flate2;
[INFO] [stdout]    | -------------------- the item `flate2` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `minilzo` is imported redundantly
[INFO] [stdout]   --> src/diskformat/item/extent_data.rs:6:5
[INFO] [stdout]    |
[INFO] [stdout] 6  | use minilzo;
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:19:1
[INFO] [stdout]    |
[INFO] [stdout] 19 | extern crate minilzo;
[INFO] [stdout]    | --------------------- the item `minilzo` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/diskformat/item/extent_data.rs:226:42
[INFO] [stdout]     |
[INFO] [stdout] 226 |                 BTRFS_EXTENT_DATA_LZO_COMPRESSION => try! (
[INFO] [stdout]     |                                                      ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::ioctl_device_path::*`
[INFO] [stdout]   --> src/linux/ctypes/mod.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub use self::ioctl_device_path::*;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/linux/imports.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub use std::io;
[INFO] [stdout]   |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `linux::operations::*`
[INFO] [stdout]   --> src/linux/imports.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub use linux::operations::*;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/linux/types/file_descriptor.rs:22:4
[INFO] [stdout]    |
[INFO] [stdout] 22 |             try! (
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/linux/types/file_descriptor.rs:35:4
[INFO] [stdout]    |
[INFO] [stdout] 35 |             try! (
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/linux/operations/deduplicate.rs:275:2
[INFO] [stdout]     |
[INFO] [stdout] 275 |     try! (
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/linux/operations/deduplicate.rs:183:3
[INFO] [stdout]     |
[INFO] [stdout] 183 |         try! (
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::ioctl_device_path::*`
[INFO] [stdout]   --> src/linux/ctypes/mod.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub use self::ioctl_device_path::*;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/linux/operations/deduplicate.rs:200:3
[INFO] [stdout]     |
[INFO] [stdout] 200 |         try! (
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/linux/imports.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub use std::io;
[INFO] [stdout]   |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/linux/operations/deduplicate.rs:226:4
[INFO] [stdout]     |
[INFO] [stdout] 226 |             try! (
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/linux/operations/fiemap.rs:19:3
[INFO] [stdout]    |
[INFO] [stdout] 19 |         try! (
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `linux::operations::*`
[INFO] [stdout]   --> src/linux/imports.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub use linux::operations::*;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/linux/operations/fiemap.rs:52:4
[INFO] [stdout]    |
[INFO] [stdout] 52 |             try! (
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/linux/operations/filesystem_info.rs:132:4
[INFO] [stdout]     |
[INFO] [stdout] 132 |             try! (
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/linux/types/file_descriptor.rs:22:4
[INFO] [stdout]    |
[INFO] [stdout] 22 |             try! (
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/linux/operations/space_info.rs:23:4
[INFO] [stdout]    |
[INFO] [stdout] 23 |             try! (
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/linux/types/file_descriptor.rs:35:4
[INFO] [stdout]    |
[INFO] [stdout] 35 |             try! (
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/linux/operations/deduplicate.rs:275:2
[INFO] [stdout]     |
[INFO] [stdout] 275 |     try! (
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/linux/operations/deduplicate.rs:183:3
[INFO] [stdout]     |
[INFO] [stdout] 183 |         try! (
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/linux/operations/deduplicate.rs:200:3
[INFO] [stdout]     |
[INFO] [stdout] 200 |         try! (
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/linux/operations/deduplicate.rs:226:4
[INFO] [stdout]     |
[INFO] [stdout] 226 |             try! (
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/linux/operations/fiemap.rs:19:3
[INFO] [stdout]    |
[INFO] [stdout] 19 |         try! (
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/linux/operations/fiemap.rs:52:4
[INFO] [stdout]    |
[INFO] [stdout] 52 |             try! (
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/linux/operations/filesystem_info.rs:132:4
[INFO] [stdout]     |
[INFO] [stdout] 132 |             try! (
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/linux/operations/space_info.rs:23:4
[INFO] [stdout]    |
[INFO] [stdout] 23 |             try! (
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/linux/operations/deduplicate.rs:193:14
[INFO] [stdout]     |
[INFO] [stdout] 193 |                 io_error.description ())
[INFO] [stdout]     |                          ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/linux/operations/deduplicate.rs:193:14
[INFO] [stdout]     |
[INFO] [stdout] 193 |                 io_error.description ())
[INFO] [stdout]     |                          ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0793]: reference to packed field is unaligned
[INFO] [stdout]    --> src/diskformat/item/extent_data.rs:213:7
[INFO] [stdout]     |
[INFO] [stdout] 213 |                         self.data ().other_encoding)
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: packed structs are only aligned by one byte, and many modern architectures penalize unaligned field accesses
[INFO] [stdout]     = note: creating a misaligned reference is undefined behavior (even if that reference is never dereferenced)
[INFO] [stdout]     = help: copy the field contents to a local variable, or replace the reference with a raw pointer and use `read_unaligned`/`write_unaligned` (loads and stores via `*p` must be properly aligned even when using raw pointers)
[INFO] [stdout]     = note: this error originates in the macro `$crate::__export::format_args` which comes from the expansion of the macro `format` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0793]: reference to packed field is unaligned
[INFO] [stdout]    --> src/diskformat/item/extent_data.rs:213:7
[INFO] [stdout]     |
[INFO] [stdout] 213 |                         self.data ().other_encoding)
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: packed structs are only aligned by one byte, and many modern architectures penalize unaligned field accesses
[INFO] [stdout]     = note: creating a misaligned reference is undefined behavior (even if that reference is never dereferenced)
[INFO] [stdout]     = help: copy the field contents to a local variable, or replace the reference with a raw pointer and use `read_unaligned`/`write_unaligned` (loads and stores via `*p` must be properly aligned even when using raw pointers)
[INFO] [stdout]     = note: this error originates in the macro `$crate::__export::format_args` which comes from the expansion of the macro `format` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error; 19 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0793`.
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error; 19 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0793`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `btrfs` (lib) due to 2 previous errors; 19 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `btrfs` (lib test) due to 2 previous errors; 19 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "89c5d1f4bdf23c9b064b51d6c0590faeb8fbcdd5a7e05fbb75810fcf0a325e8a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "89c5d1f4bdf23c9b064b51d6c0590faeb8fbcdd5a7e05fbb75810fcf0a325e8a", kill_on_drop: false }`
[INFO] [stdout] 89c5d1f4bdf23c9b064b51d6c0590faeb8fbcdd5a7e05fbb75810fcf0a325e8a
[INFO] checking btrfs-1.2.2 against try#bfe97fcae016881ad333f0ff8cea2cadb9cf136c for pr-121848
[INFO] extracting crate btrfs 1.2.2 into /workspace/builds/worker-3-tc2/source
[INFO] validating manifest of crates.io crate btrfs 1.2.2 on toolchain bfe97fcae016881ad333f0ff8cea2cadb9cf136c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bfe97fcae016881ad333f0ff8cea2cadb9cf136c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate btrfs 1.2.2
[INFO] finished tweaking crates.io crate btrfs 1.2.2
[INFO] tweaked toml for crates.io crate btrfs 1.2.2 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bfe97fcae016881ad333f0ff8cea2cadb9cf136c" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bfe97fcae016881ad333f0ff8cea2cadb9cf136c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+bfe97fcae016881ad333f0ff8cea2cadb9cf136c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f21e8c4a69181c6c0e7586ae04a1523ed1fb908988331c2a3ef95384f6cb3398
[INFO] running `Command { std: "docker" "start" "-a" "f21e8c4a69181c6c0e7586ae04a1523ed1fb908988331c2a3ef95384f6cb3398", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f21e8c4a69181c6c0e7586ae04a1523ed1fb908988331c2a3ef95384f6cb3398", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f21e8c4a69181c6c0e7586ae04a1523ed1fb908988331c2a3ef95384f6cb3398", kill_on_drop: false }`
[INFO] [stdout] f21e8c4a69181c6c0e7586ae04a1523ed1fb908988331c2a3ef95384f6cb3398
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+bfe97fcae016881ad333f0ff8cea2cadb9cf136c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 055dd3f6581d74fdc19f69ece6b9aecd923a51be41a1028f0953a91fd3fbc2c4
[INFO] running `Command { std: "docker" "start" "-a" "055dd3f6581d74fdc19f69ece6b9aecd923a51be41a1028f0953a91fd3fbc2c4", kill_on_drop: false }`
[INFO] [stderr]    Compiling build_const v0.2.2
[INFO] [stderr]     Checking bitflags v0.7.0
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]    Compiling miniz-sys v0.1.12
[INFO] [stderr]     Checking minilzo-sys v0.1.0
[INFO] [stderr]     Checking uuid v0.5.1
[INFO] [stderr]     Checking lazy_static v0.2.11
[INFO] [stderr]     Checking nix v0.8.1
[INFO] [stderr]     Checking minilzo v0.2.0
[INFO] [stderr]    Compiling crc v1.8.1
[INFO] [stderr]     Checking flate2 v0.2.20
[INFO] [stderr]     Checking btrfs v1.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]   --> src/lib.rs:10:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | #[ macro_use ]
[INFO] [stdout]    | ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `libc` is imported redundantly
[INFO] [stdout]   --> src/compress/lzo.rs:1:5
[INFO] [stdout]    |
[INFO] [stdout] 1  | use libc;
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:17:1
[INFO] [stdout]    |
[INFO] [stdout] 17 | extern crate libc;
[INFO] [stdout]    | ------------------ the item `libc` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `flate2` is imported redundantly
[INFO] [stdout]   --> src/diskformat/item/extent_data.rs:4:5
[INFO] [stdout]    |
[INFO] [stdout] 4  | use flate2;
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | extern crate flate2;
[INFO] [stdout]    | -------------------- the item `flate2` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]   --> src/lib.rs:10:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | #[ macro_use ]
[INFO] [stdout]    | ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `minilzo` is imported redundantly
[INFO] [stdout]   --> src/diskformat/item/extent_data.rs:6:5
[INFO] [stdout]    |
[INFO] [stdout] 6  | use minilzo;
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:19:1
[INFO] [stdout]    |
[INFO] [stdout] 19 | extern crate minilzo;
[INFO] [stdout]    | --------------------- the item `minilzo` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/diskformat/item/extent_data.rs:226:42
[INFO] [stdout]     |
[INFO] [stdout] 226 |                 BTRFS_EXTENT_DATA_LZO_COMPRESSION => try! (
[INFO] [stdout]     |                                                      ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `libc` is imported redundantly
[INFO] [stdout]   --> src/compress/lzo.rs:1:5
[INFO] [stdout]    |
[INFO] [stdout] 1  | use libc;
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:17:1
[INFO] [stdout]    |
[INFO] [stdout] 17 | extern crate libc;
[INFO] [stdout]    | ------------------ the item `libc` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `flate2` is imported redundantly
[INFO] [stdout]   --> src/diskformat/item/extent_data.rs:4:5
[INFO] [stdout]    |
[INFO] [stdout] 4  | use flate2;
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | extern crate flate2;
[INFO] [stdout]    | -------------------- the item `flate2` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `minilzo` is imported redundantly
[INFO] [stdout]   --> src/diskformat/item/extent_data.rs:6:5
[INFO] [stdout]    |
[INFO] [stdout] 6  | use minilzo;
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:19:1
[INFO] [stdout]    |
[INFO] [stdout] 19 | extern crate minilzo;
[INFO] [stdout]    | --------------------- the item `minilzo` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::ioctl_device_path::*`
[INFO] [stdout]   --> src/linux/ctypes/mod.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub use self::ioctl_device_path::*;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/diskformat/item/extent_data.rs:226:42
[INFO] [stdout]     |
[INFO] [stdout] 226 |                 BTRFS_EXTENT_DATA_LZO_COMPRESSION => try! (
[INFO] [stdout]     |                                                      ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/linux/imports.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub use std::io;
[INFO] [stdout]   |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `linux::operations::*`
[INFO] [stdout]   --> src/linux/imports.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub use linux::operations::*;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/linux/types/file_descriptor.rs:22:4
[INFO] [stdout]    |
[INFO] [stdout] 22 |             try! (
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/linux/types/file_descriptor.rs:35:4
[INFO] [stdout]    |
[INFO] [stdout] 35 |             try! (
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/linux/operations/deduplicate.rs:275:2
[INFO] [stdout]     |
[INFO] [stdout] 275 |     try! (
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::ioctl_device_path::*`
[INFO] [stdout]   --> src/linux/ctypes/mod.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub use self::ioctl_device_path::*;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/linux/operations/deduplicate.rs:183:3
[INFO] [stdout]     |
[INFO] [stdout] 183 |         try! (
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/linux/imports.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub use std::io;
[INFO] [stdout]   |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/linux/operations/deduplicate.rs:200:3
[INFO] [stdout]     |
[INFO] [stdout] 200 |         try! (
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `linux::operations::*`
[INFO] [stdout]   --> src/linux/imports.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub use linux::operations::*;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/linux/operations/deduplicate.rs:226:4
[INFO] [stdout]     |
[INFO] [stdout] 226 |             try! (
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/linux/types/file_descriptor.rs:22:4
[INFO] [stdout]    |
[INFO] [stdout] 22 |             try! (
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/linux/operations/fiemap.rs:19:3
[INFO] [stdout]    |
[INFO] [stdout] 19 |         try! (
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/linux/operations/fiemap.rs:52:4
[INFO] [stdout]    |
[INFO] [stdout] 52 |             try! (
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/linux/types/file_descriptor.rs:35:4
[INFO] [stdout]    |
[INFO] [stdout] 35 |             try! (
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/linux/operations/filesystem_info.rs:132:4
[INFO] [stdout]     |
[INFO] [stdout] 132 |             try! (
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/linux/operations/deduplicate.rs:275:2
[INFO] [stdout]     |
[INFO] [stdout] 275 |     try! (
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/linux/operations/space_info.rs:23:4
[INFO] [stdout]    |
[INFO] [stdout] 23 |             try! (
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/linux/operations/deduplicate.rs:183:3
[INFO] [stdout]     |
[INFO] [stdout] 183 |         try! (
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/linux/operations/deduplicate.rs:200:3
[INFO] [stdout]     |
[INFO] [stdout] 200 |         try! (
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/linux/operations/deduplicate.rs:226:4
[INFO] [stdout]     |
[INFO] [stdout] 226 |             try! (
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/linux/operations/fiemap.rs:19:3
[INFO] [stdout]    |
[INFO] [stdout] 19 |         try! (
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/linux/operations/fiemap.rs:52:4
[INFO] [stdout]    |
[INFO] [stdout] 52 |             try! (
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/linux/operations/filesystem_info.rs:132:4
[INFO] [stdout]     |
[INFO] [stdout] 132 |             try! (
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/linux/operations/space_info.rs:23:4
[INFO] [stdout]    |
[INFO] [stdout] 23 |             try! (
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/linux/operations/deduplicate.rs:193:14
[INFO] [stdout]     |
[INFO] [stdout] 193 |                 io_error.description ())
[INFO] [stdout]     |                          ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/linux/operations/deduplicate.rs:193:14
[INFO] [stdout]     |
[INFO] [stdout] 193 |                 io_error.description ())
[INFO] [stdout]     |                          ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0793]: reference to packed field is unaligned
[INFO] [stdout]    --> src/diskformat/item/extent_data.rs:213:7
[INFO] [stdout]     |
[INFO] [stdout] 213 |                         self.data ().other_encoding)
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: packed structs are only aligned by one byte, and many modern architectures penalize unaligned field accesses
[INFO] [stdout]     = note: creating a misaligned reference is undefined behavior (even if that reference is never dereferenced)
[INFO] [stdout]     = help: copy the field contents to a local variable, or replace the reference with a raw pointer and use `read_unaligned`/`write_unaligned` (loads and stores via `*p` must be properly aligned even when using raw pointers)
[INFO] [stdout]     = note: this error originates in the macro `$crate::__export::format_args` which comes from the expansion of the macro `format` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0793]: reference to packed field is unaligned
[INFO] [stdout]    --> src/diskformat/item/extent_data.rs:213:7
[INFO] [stdout]     |
[INFO] [stdout] 213 |                         self.data ().other_encoding)
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: packed structs are only aligned by one byte, and many modern architectures penalize unaligned field accesses
[INFO] [stdout]     = note: creating a misaligned reference is undefined behavior (even if that reference is never dereferenced)
[INFO] [stdout]     = help: copy the field contents to a local variable, or replace the reference with a raw pointer and use `read_unaligned`/`write_unaligned` (loads and stores via `*p` must be properly aligned even when using raw pointers)
[INFO] [stdout]     = note: this error originates in the macro `$crate::__export::format_args` which comes from the expansion of the macro `format` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error; 19 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0793`.
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error; 19 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0793`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `btrfs` (lib) due to 2 previous errors; 19 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `btrfs` (lib test) due to 2 previous errors; 19 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "055dd3f6581d74fdc19f69ece6b9aecd923a51be41a1028f0953a91fd3fbc2c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "055dd3f6581d74fdc19f69ece6b9aecd923a51be41a1028f0953a91fd3fbc2c4", kill_on_drop: false }`
[INFO] [stdout] 055dd3f6581d74fdc19f69ece6b9aecd923a51be41a1028f0953a91fd3fbc2c4
