[INFO] fetching crate exif 0.0.1...
[INFO] documenting exif-0.0.1 against master#394e1b40d264aa6928811919c1124fa248e7d802 for pr-73566
[INFO] extracting crate exif 0.0.1 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate exif 0.0.1 on toolchain 394e1b40d264aa6928811919c1124fa248e7d802
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate exif 0.0.1
[INFO] finished tweaking crates.io crate exif 0.0.1
[INFO] tweaked toml for crates.io crate exif 0.0.1 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded exif-sys v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b5e39d4f090e2630d688272a0a2ac00e8e6a23df9227adf246de321bf3520495
[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" "b5e39d4f090e2630d688272a0a2ac00e8e6a23df9227adf246de321bf3520495", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b5e39d4f090e2630d688272a0a2ac00e8e6a23df9227adf246de321bf3520495", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b5e39d4f090e2630d688272a0a2ac00e8e6a23df9227adf246de321bf3520495", kill_on_drop: false }`
[INFO] [stdout] b5e39d4f090e2630d688272a0a2ac00e8e6a23df9227adf246de321bf3520495
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c648786d97626e9e0b3008b3ca78d091865a33197604321871f669500d508a92
[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" "c648786d97626e9e0b3008b3ca78d091865a33197604321871f669500d508a92", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]    Compiling exif-sys v0.1.0
[INFO] [stderr]  Documenting exif v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `extern` fn uses type `value::Rational<u32>`, which is not FFI-safe
[INFO] [stdout]    --> src/value.rs:139:82
[INFO] [stdout]     |
[INFO] [stdout] 139 | unsafe extern "C" fn get_urational(buf: *const u8, byte_order: ExifByteOrder) -> Rational<u32> {
[INFO] [stdout]     |                                                                                  ^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(improper_ctypes_definitions)]` on by default
[INFO] [stdout]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]     = note: this struct has unspecified layout
[INFO] [stdout] note: the type is defined here
[INFO] [stdout]    --> src/value.rs:27:1
[INFO] [stdout]     |
[INFO] [stdout] 27  | pub struct Rational<T>(pub T, pub T);
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `value::Rational<i32>`, which is not FFI-safe
[INFO] [stdout]    --> src/value.rs:145:82
[INFO] [stdout]     |
[INFO] [stdout] 145 | unsafe extern "C" fn get_irational(buf: *const u8, byte_order: ExifByteOrder) -> Rational<i32> {
[INFO] [stdout]     |                                                                                  ^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]     = note: this struct has unspecified layout
[INFO] [stdout] note: the type is defined here
[INFO] [stdout]    --> src/value.rs:27:1
[INFO] [stdout]     |
[INFO] [stdout] 27  | pub struct Rational<T>(pub T, pub T);
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.99s
[INFO] running `Command { std: "docker" "inspect" "c648786d97626e9e0b3008b3ca78d091865a33197604321871f669500d508a92", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c648786d97626e9e0b3008b3ca78d091865a33197604321871f669500d508a92", kill_on_drop: false }`
[INFO] [stdout] c648786d97626e9e0b3008b3ca78d091865a33197604321871f669500d508a92