[INFO] crate devicemapper 0.27.0 is already in cache
[INFO] extracting crate devicemapper 0.27.0 into work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/reg/devicemapper/0.27.0
[INFO] extracting crate devicemapper 0.27.0 into work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/reg/devicemapper/0.27.0
[INFO] validating manifest of devicemapper-0.27.0 on toolchain master#e305df1846a6d985315917ae0c81b74af8b4e641
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of devicemapper-0.27.0 on toolchain try#99a7498759a22b5684caf798a98b7e90ad9d2443
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+99a7498759a22b5684caf798a98b7e90ad9d2443-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing devicemapper-0.27.0
[INFO] finished frobbing devicemapper-0.27.0
[INFO] frobbed toml for devicemapper-0.27.0 written to work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/reg/devicemapper/0.27.0/Cargo.toml
[INFO] started frobbing devicemapper-0.27.0
[INFO] finished frobbing devicemapper-0.27.0
[INFO] frobbed toml for devicemapper-0.27.0 written to work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/reg/devicemapper/0.27.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+99a7498759a22b5684caf798a98b7e90ad9d2443-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+99a7498759a22b5684caf798a98b7e90ad9d2443-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking devicemapper-0.27.0 against master#e305df1846a6d985315917ae0c81b74af8b4e641 for pr-60039-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-60039-1/worker-3/master#e305df1846a6d985315917ae0c81b74af8b4e641:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/reg/devicemapper/0.27.0:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 0d67bcbb41e5f9f4de14ae500c9752e70e6046c6dd855c8ffda5b21fda9ddab3
[INFO] running `"docker" "start" "-a" "0d67bcbb41e5f9f4de14ae500c9752e70e6046c6dd855c8ffda5b21fda9ddab3"`
[INFO] [stderr]     Checking loopdev v0.2.1
[INFO] [stderr]     Checking libmount v0.1.12
[INFO] [stderr]     Checking devicemapper v0.27.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/core/types.rs:19:1
[INFO] [stderr]    |
[INFO] [stderr] 19 | / /// A devicemapper name. Really just a string, but also the argument type of
[INFO] [stderr] 20 | | /// DevId::Name. Used in function arguments to indicate that the function
[INFO] [stderr] 21 | | /// takes only a name, not a devicemapper uuid.
[INFO] [stderr]    | |_______________________________________________^
[INFO] [stderr] 22 |   str_id!(DmName, DmNameBuf, DM_NAME_LEN, err_func);
[INFO] [stderr]    |   -------------------------------------------------- rustdoc does not generate documentation for macro expansions
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_doc_comments)] on by default
[INFO] [stderr]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/core/types.rs:24:1
[INFO] [stderr]    |
[INFO] [stderr] 24 | / /// A devicemapper uuid. A devicemapper uuid has a devicemapper-specific
[INFO] [stderr] 25 | | /// format.
[INFO] [stderr]    | |___________^
[INFO] [stderr] 26 |   str_id!(DmUuid, DmUuidBuf, DM_UUID_LEN, err_func);
[INFO] [stderr]    |   -------------------------------------------------- rustdoc does not generate documentation for macro expansions
[INFO] [stderr]    |
[INFO] [stderr]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/core/types.rs:19:1
[INFO] [stderr]    |
[INFO] [stderr] 19 | / /// A devicemapper name. Really just a string, but also the argument type of
[INFO] [stderr] 20 | | /// DevId::Name. Used in function arguments to indicate that the function
[INFO] [stderr] 21 | | /// takes only a name, not a devicemapper uuid.
[INFO] [stderr]    | |_______________________________________________^
[INFO] [stderr] 22 |   str_id!(DmName, DmNameBuf, DM_NAME_LEN, err_func);
[INFO] [stderr]    |   -------------------------------------------------- rustdoc does not generate documentation for macro expansions
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_doc_comments)] on by default
[INFO] [stderr]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/core/types.rs:24:1
[INFO] [stderr]    |
[INFO] [stderr] 24 | / /// A devicemapper uuid. A devicemapper uuid has a devicemapper-specific
[INFO] [stderr] 25 | | /// format.
[INFO] [stderr]    | |___________^
[INFO] [stderr] 26 |   str_id!(DmUuid, DmUuidBuf, DM_UUID_LEN, err_func);
[INFO] [stderr]    |   -------------------------------------------------- rustdoc does not generate documentation for macro expansions
[INFO] [stderr]    |
[INFO] [stderr]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/loopbacked.rs:19:1
[INFO] [stderr]    |
[INFO] [stderr] 19 | /// send IOCTL via blkgetsize64
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 20 | ioctl_read!(blkgetsize64, 0x12, 114, u64);
[INFO] [stderr]    | ------------------------------------------ rustdoc does not generate documentation for macro expansions
[INFO] [stderr]    |
[INFO] [stderr]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/loopbacked.rs:99:13
[INFO] [stderr]    |
[INFO] [stderr] 99 |         let mut f = OpenOptions::new()
[INFO] [stderr]    |             ----^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.25s
[INFO] running `"docker" "inspect" "0d67bcbb41e5f9f4de14ae500c9752e70e6046c6dd855c8ffda5b21fda9ddab3"`
[INFO] running `"docker" "rm" "-f" "0d67bcbb41e5f9f4de14ae500c9752e70e6046c6dd855c8ffda5b21fda9ddab3"`
[INFO] [stdout] 0d67bcbb41e5f9f4de14ae500c9752e70e6046c6dd855c8ffda5b21fda9ddab3