[INFO] cloning repository https://github.com/dsgriffin/freefare-sys
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dsgriffin/freefare-sys" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdsgriffin%2Ffreefare-sys", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdsgriffin%2Ffreefare-sys'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4163cc10b30e0988acae3fc335709ae16cfa14f5
[INFO] testing dsgriffin/freefare-sys against beta-2020-10-09 for beta-1.48-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdsgriffin%2Ffreefare-sys" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dsgriffin/freefare-sys on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/dsgriffin/freefare-sys
[INFO] finished tweaking git repo https://github.com/dsgriffin/freefare-sys
[INFO] tweaked toml for git repo https://github.com/dsgriffin/freefare-sys written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/dsgriffin/freefare-sys already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e5c89f6a3f391424535a6dfff1175ad54c879577651c67001d289dde487360f0
[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" "e5c89f6a3f391424535a6dfff1175ad54c879577651c67001d289dde487360f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e5c89f6a3f391424535a6dfff1175ad54c879577651c67001d289dde487360f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e5c89f6a3f391424535a6dfff1175ad54c879577651c67001d289dde487360f0", kill_on_drop: false }`
[INFO] [stdout] e5c89f6a3f391424535a6dfff1175ad54c879577651c67001d289dde487360f0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=warn" "-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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ddcfb1606074867d05759c2f96c443aaf538064597ac6f08fb3373e61aa683df
[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" "ddcfb1606074867d05759c2f96c443aaf538064597ac6f08fb3373e61aa683df", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.17
[INFO] [stderr]    Compiling nfc-sys v0.1.5
[INFO] [stderr]    Compiling freefare-sys v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `extern` block uses type `[u8; 4]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:290:15
[INFO] [stdout]     |
[INFO] [stdout] 290 |         data: MifareUltralightPage,
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(improper_ctypes)]` on by default
[INFO] [stdout]     = help: consider passing a pointer to the array
[INFO] [stdout]     = note: passing raw arrays by value is not FFI-safe
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` block uses type `[u8; 6]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:309:14
[INFO] [stdout]     |
[INFO] [stdout] 309 |         key: MifareClassicKey,
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider passing a pointer to the array
[INFO] [stdout]     = note: passing raw arrays by value is not FFI-safe
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` block uses type `[u8; 16]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:332:15
[INFO] [stdout]     |
[INFO] [stdout] 332 |         data: MifareClassicBlock,
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider passing a pointer to the array
[INFO] [stdout]     = note: passing raw arrays by value is not FFI-safe
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` block uses type `[u8; 6]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:370:16
[INFO] [stdout]     |
[INFO] [stdout] 370 |         key_a: MifareClassicKey,
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider passing a pointer to the array
[INFO] [stdout]     = note: passing raw arrays by value is not FFI-safe
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` block uses type `[u8; 6]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:376:16
[INFO] [stdout]     |
[INFO] [stdout] 376 |         key_b: MifareClassicKey,
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider passing a pointer to the array
[INFO] [stdout]     = note: passing raw arrays by value is not FFI-safe
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` block uses type `[u8; 6]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:393:26
[INFO] [stdout]     |
[INFO] [stdout] 393 |         key_b_sector_00: MifareClassicKey,
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider passing a pointer to the array
[INFO] [stdout]     = note: passing raw arrays by value is not FFI-safe
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` block uses type `[u8; 6]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:394:26
[INFO] [stdout]     |
[INFO] [stdout] 394 |         key_b_sector_10: MifareClassicKey,
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider passing a pointer to the array
[INFO] [stdout]     = note: passing raw arrays by value is not FFI-safe
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` block uses type `[u8; 6]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:426:14
[INFO] [stdout]     |
[INFO] [stdout] 426 |         key: MifareClassicKey,
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider passing a pointer to the array
[INFO] [stdout]     = note: passing raw arrays by value is not FFI-safe
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` block uses type `[u8; 6]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:435:14
[INFO] [stdout]     |
[INFO] [stdout] 435 |         key: MifareClassicKey,
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider passing a pointer to the array
[INFO] [stdout]     = note: passing raw arrays by value is not FFI-safe
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.45s
[INFO] running `Command { std: "docker" "inspect" "ddcfb1606074867d05759c2f96c443aaf538064597ac6f08fb3373e61aa683df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ddcfb1606074867d05759c2f96c443aaf538064597ac6f08fb3373e61aa683df", kill_on_drop: false }`
[INFO] [stdout] ddcfb1606074867d05759c2f96c443aaf538064597ac6f08fb3373e61aa683df
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=warn" "-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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5f748f2152a5a14cdc7fc6ee6b787f8ee11ff5c333a9c313453e02e1d04f3a4a
[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" "5f748f2152a5a14cdc7fc6ee6b787f8ee11ff5c333a9c313453e02e1d04f3a4a", kill_on_drop: false }`
[INFO] [stderr]    Compiling freefare-sys v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `extern` block uses type `[u8; 4]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:290:15
[INFO] [stdout]     |
[INFO] [stdout] 290 |         data: MifareUltralightPage,
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(improper_ctypes)]` on by default
[INFO] [stdout]     = help: consider passing a pointer to the array
[INFO] [stdout]     = note: passing raw arrays by value is not FFI-safe
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` block uses type `[u8; 6]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:309:14
[INFO] [stdout]     |
[INFO] [stdout] 309 |         key: MifareClassicKey,
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider passing a pointer to the array
[INFO] [stdout]     = note: passing raw arrays by value is not FFI-safe
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` block uses type `[u8; 16]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:332:15
[INFO] [stdout]     |
[INFO] [stdout] 332 |         data: MifareClassicBlock,
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider passing a pointer to the array
[INFO] [stdout]     = note: passing raw arrays by value is not FFI-safe
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` block uses type `[u8; 6]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:370:16
[INFO] [stdout]     |
[INFO] [stdout] 370 |         key_a: MifareClassicKey,
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider passing a pointer to the array
[INFO] [stdout]     = note: passing raw arrays by value is not FFI-safe
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` block uses type `[u8; 6]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:376:16
[INFO] [stdout]     |
[INFO] [stdout] 376 |         key_b: MifareClassicKey,
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider passing a pointer to the array
[INFO] [stdout]     = note: passing raw arrays by value is not FFI-safe
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` block uses type `[u8; 6]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:393:26
[INFO] [stdout]     |
[INFO] [stdout] 393 |         key_b_sector_00: MifareClassicKey,
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider passing a pointer to the array
[INFO] [stdout]     = note: passing raw arrays by value is not FFI-safe
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` block uses type `[u8; 6]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:394:26
[INFO] [stdout]     |
[INFO] [stdout] 394 |         key_b_sector_10: MifareClassicKey,
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider passing a pointer to the array
[INFO] [stdout]     = note: passing raw arrays by value is not FFI-safe
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` block uses type `[u8; 6]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:426:14
[INFO] [stdout]     |
[INFO] [stdout] 426 |         key: MifareClassicKey,
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider passing a pointer to the array
[INFO] [stdout]     = note: passing raw arrays by value is not FFI-safe
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` block uses type `[u8; 6]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:435:14
[INFO] [stdout]     |
[INFO] [stdout] 435 |         key: MifareClassicKey,
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider passing a pointer to the array
[INFO] [stdout]     = note: passing raw arrays by value is not FFI-safe
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` block uses type `[u8; 4]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:290:15
[INFO] [stdout]     |
[INFO] [stdout] 290 |         data: MifareUltralightPage,
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(improper_ctypes)]` on by default
[INFO] [stdout]     = help: consider passing a pointer to the array
[INFO] [stdout]     = note: passing raw arrays by value is not FFI-safe
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` block uses type `[u8; 6]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:309:14
[INFO] [stdout]     |
[INFO] [stdout] 309 |         key: MifareClassicKey,
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider passing a pointer to the array
[INFO] [stdout]     = note: passing raw arrays by value is not FFI-safe
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` block uses type `[u8; 16]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:332:15
[INFO] [stdout]     |
[INFO] [stdout] 332 |         data: MifareClassicBlock,
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider passing a pointer to the array
[INFO] [stdout]     = note: passing raw arrays by value is not FFI-safe
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` block uses type `[u8; 6]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:370:16
[INFO] [stdout]     |
[INFO] [stdout] 370 |         key_a: MifareClassicKey,
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider passing a pointer to the array
[INFO] [stdout]     = note: passing raw arrays by value is not FFI-safe
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` block uses type `[u8; 6]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:376:16
[INFO] [stdout]     |
[INFO] [stdout] 376 |         key_b: MifareClassicKey,
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider passing a pointer to the array
[INFO] [stdout]     = note: passing raw arrays by value is not FFI-safe
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` block uses type `[u8; 6]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:393:26
[INFO] [stdout]     |
[INFO] [stdout] 393 |         key_b_sector_00: MifareClassicKey,
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider passing a pointer to the array
[INFO] [stdout]     = note: passing raw arrays by value is not FFI-safe
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` block uses type `[u8; 6]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:394:26
[INFO] [stdout]     |
[INFO] [stdout] 394 |         key_b_sector_10: MifareClassicKey,
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider passing a pointer to the array
[INFO] [stdout]     = note: passing raw arrays by value is not FFI-safe
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` block uses type `[u8; 6]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:426:14
[INFO] [stdout]     |
[INFO] [stdout] 426 |         key: MifareClassicKey,
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider passing a pointer to the array
[INFO] [stdout]     = note: passing raw arrays by value is not FFI-safe
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` block uses type `[u8; 6]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:435:14
[INFO] [stdout]     |
[INFO] [stdout] 435 |         key: MifareClassicKey,
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider passing a pointer to the array
[INFO] [stdout]     = note: passing raw arrays by value is not FFI-safe
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: linking with `cc` failed: exit code: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note: "cc" "-Wl,--as-needed" "-Wl,-z,noexecstack" "-m64" "-Wl,--eh-frame-hdr" "-L" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/opt/rustwide/target/debug/deps/freefare_sys-4cbb8f09fd1ec6bb.freefare_sys.dxyb09k0-cgu.0.rcgu.o" "/opt/rustwide/target/debug/deps/freefare_sys-4cbb8f09fd1ec6bb.freefare_sys.dxyb09k0-cgu.1.rcgu.o" "/opt/rustwide/target/debug/deps/freefare_sys-4cbb8f09fd1ec6bb.freefare_sys.dxyb09k0-cgu.2.rcgu.o" "/opt/rustwide/target/debug/deps/freefare_sys-4cbb8f09fd1ec6bb.freefare_sys.dxyb09k0-cgu.3.rcgu.o" "/opt/rustwide/target/debug/deps/freefare_sys-4cbb8f09fd1ec6bb.freefare_sys.dxyb09k0-cgu.4.rcgu.o" "/opt/rustwide/target/debug/deps/freefare_sys-4cbb8f09fd1ec6bb.freefare_sys.dxyb09k0-cgu.5.rcgu.o" "/opt/rustwide/target/debug/deps/freefare_sys-4cbb8f09fd1ec6bb.freefare_sys.dxyb09k0-cgu.6.rcgu.o" "-o" "/opt/rustwide/target/debug/deps/freefare_sys-4cbb8f09fd1ec6bb" "/opt/rustwide/target/debug/deps/freefare_sys-4cbb8f09fd1ec6bb.31sk0iqzvrh90xkk.rcgu.o" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/rustwide/target/debug/deps" "-L" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-lfreefare" "-lfreefare" "-Wl,-Bstatic" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libtest-8c293b579fdb38fc.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libterm-ef7d6114ddb41a44.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libgetopts-16c582eb506314ba.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunicode_width-6abbb81e68fea101.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_std-4437f76c42770bc3.rlib" "/opt/rustwide/target/debug/deps/libnfc_sys-b96fbf5c95736263.rlib" "/opt/rustwide/target/debug/deps/liblibc-baa3c7964edfb953.rlib" "-Wl,--start-group" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-3532beb752f910d7.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-3529ece450b7f3c6.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libminiz_oxide-23e8f582a6744f80.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libadler-5e7e0793b29cbf78.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libobject-253e0736424ceb78.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libaddr2line-b6fd484888124c85.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libgimli-cca4d20e4b53839c.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-0a7401891c2a4f50.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-efbb25e073df787e.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-25965457612624bc.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-09058283ea779342.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-ab973dacc0513511.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-b437d6640b1f764b.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-8cc0b2380206399c.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-727cdf2b6a468113.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-cf4d442d877ea2f4.rlib" "-Wl,--end-group" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-7e5b6df427ca977c.rlib" "-Wl,-Bdynamic" "-lnfc" "-lutil" "-lgcc_s" "-lc" "-lm" "-lrt" "-lpthread" "-lutil" "-ldl" "-lutil"
[INFO] [stdout]   = note: /usr/bin/ld: cannot find -lfreefare
[INFO] [stdout]           /usr/bin/ld: cannot find -lfreefare
[INFO] [stdout]           collect2: error: ld returned 1 exit status
[INFO] [stdout]           
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `freefare-sys`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "5f748f2152a5a14cdc7fc6ee6b787f8ee11ff5c333a9c313453e02e1d04f3a4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f748f2152a5a14cdc7fc6ee6b787f8ee11ff5c333a9c313453e02e1d04f3a4a", kill_on_drop: false }`
[INFO] [stdout] 5f748f2152a5a14cdc7fc6ee6b787f8ee11ff5c333a9c313453e02e1d04f3a4a
