[INFO] fetching crate xtensa-lx6-rt 0.3.0...
[INFO] checking xtensa-lx6-rt-0.3.0 against master#119d2a1a98fe87d4ae6cabf12134a0ef2fb95851 for pr-75180
[INFO] extracting crate xtensa-lx6-rt 0.3.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate xtensa-lx6-rt 0.3.0 on toolchain 119d2a1a98fe87d4ae6cabf12134a0ef2fb95851
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+119d2a1a98fe87d4ae6cabf12134a0ef2fb95851" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate xtensa-lx6-rt 0.3.0
[INFO] finished tweaking crates.io crate xtensa-lx6-rt 0.3.0
[INFO] tweaked toml for crates.io crate xtensa-lx6-rt 0.3.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+119d2a1a98fe87d4ae6cabf12134a0ef2fb95851" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+119d2a1a98fe87d4ae6cabf12134a0ef2fb95851" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+119d2a1a98fe87d4ae6cabf12134a0ef2fb95851" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8e1bc60185918a38528c397398b7e1ec209f0d65ebf923303ee8bf806af13d08
[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" "8e1bc60185918a38528c397398b7e1ec209f0d65ebf923303ee8bf806af13d08", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8e1bc60185918a38528c397398b7e1ec209f0d65ebf923303ee8bf806af13d08", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8e1bc60185918a38528c397398b7e1ec209f0d65ebf923303ee8bf806af13d08", kill_on_drop: false }`
[INFO] [stdout] 8e1bc60185918a38528c397398b7e1ec209f0d65ebf923303ee8bf806af13d08
[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=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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+119d2a1a98fe87d4ae6cabf12134a0ef2fb95851" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 35bd9d068b3d15a75e032651f9591e96b41f909f57ddbdd6def8bbbb792743f0
[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" "35bd9d068b3d15a75e032651f9591e96b41f909f57ddbdd6def8bbbb792743f0", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.39
[INFO] [stderr]    Compiling xtensa-lx6-rt v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking r0 v1.0.0
[INFO] [stderr]    Compiling bare-metal v0.2.5
[INFO] [stderr]    Compiling xtensa-lx6-rt-proc-macros v0.1.0
[INFO] [stdout] warning: `extern` fn uses type `exception::ExceptionCause`, which is not FFI-safe
[INFO] [stdout]    --> src/exception.rs:210:42
[INFO] [stdout]     |
[INFO] [stdout] 210 | extern "C" fn __default_exception(cause: ExceptionCause, save_frame: &Context) {
[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)]`, `#[repr(transparent)]`, or integer `#[repr(...)]` attribute to this enum
[INFO] [stdout]     = note: enum has no representation hint
[INFO] [stdout] note: the type is defined here
[INFO] [stdout]    --> src/exception.rs:34:1
[INFO] [stdout]     |
[INFO] [stdout] 34  | / pub enum ExceptionCause {
[INFO] [stdout] 35  | |     /// Illegal Instruction
[INFO] [stdout] 36  | |     Illegal = 0,
[INFO] [stdout] 37  | |     /// System Call (Syscall Instruction)
[INFO] [stdout] ...   |
[INFO] [stdout] 116 | |     None = 255,
[INFO] [stdout] 117 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `exception::ExceptionCause`, which is not FFI-safe
[INFO] [stdout]    --> src/exception.rs:222:49
[INFO] [stdout]     |
[INFO] [stdout] 222 | extern "C" fn __default_double_exception(cause: ExceptionCause, save_frame: &Context) {
[INFO] [stdout]     |                                                 ^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider adding a `#[repr(C)]`, `#[repr(transparent)]`, or integer `#[repr(...)]` attribute to this enum
[INFO] [stdout]     = note: enum has no representation hint
[INFO] [stdout] note: the type is defined here
[INFO] [stdout]    --> src/exception.rs:34:1
[INFO] [stdout]     |
[INFO] [stdout] 34  | / pub enum ExceptionCause {
[INFO] [stdout] 35  | |     /// Illegal Instruction
[INFO] [stdout] 36  | |     Illegal = 0,
[INFO] [stdout] 37  | |     /// System Call (Syscall Instruction)
[INFO] [stdout] ...   |
[INFO] [stdout] 116 | |     None = 255,
[INFO] [stdout] 117 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `exception::ExceptionCause`, which is not FFI-safe
[INFO] [stdout]    --> src/exception.rs:210:42
[INFO] [stdout]     |
[INFO] [stdout] 210 | extern "C" fn __default_exception(cause: ExceptionCause, save_frame: &Context) {
[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)]`, `#[repr(transparent)]`, or integer `#[repr(...)]` attribute to this enum
[INFO] [stdout]     = note: enum has no representation hint
[INFO] [stdout] note: the type is defined here
[INFO] [stdout]    --> src/exception.rs:34:1
[INFO] [stdout]     |
[INFO] [stdout] 34  | / pub enum ExceptionCause {
[INFO] [stdout] 35  | |     /// Illegal Instruction
[INFO] [stdout] 36  | |     Illegal = 0,
[INFO] [stdout] 37  | |     /// System Call (Syscall Instruction)
[INFO] [stdout] ...   |
[INFO] [stdout] 116 | |     None = 255,
[INFO] [stdout] 117 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `exception::ExceptionCause`, which is not FFI-safe
[INFO] [stdout]    --> src/exception.rs:222:49
[INFO] [stdout]     |
[INFO] [stdout] 222 | extern "C" fn __default_double_exception(cause: ExceptionCause, save_frame: &Context) {
[INFO] [stdout]     |                                                 ^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider adding a `#[repr(C)]`, `#[repr(transparent)]`, or integer `#[repr(...)]` attribute to this enum
[INFO] [stdout]     = note: enum has no representation hint
[INFO] [stdout] note: the type is defined here
[INFO] [stdout]    --> src/exception.rs:34:1
[INFO] [stdout]     |
[INFO] [stdout] 34  | / pub enum ExceptionCause {
[INFO] [stdout] 35  | |     /// Illegal Instruction
[INFO] [stdout] 36  | |     Illegal = 0,
[INFO] [stdout] 37  | |     /// System Call (Syscall Instruction)
[INFO] [stdout] ...   |
[INFO] [stdout] 116 | |     None = 255,
[INFO] [stdout] 117 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 16.71s
[INFO] running `Command { std: "docker" "inspect" "35bd9d068b3d15a75e032651f9591e96b41f909f57ddbdd6def8bbbb792743f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "35bd9d068b3d15a75e032651f9591e96b41f909f57ddbdd6def8bbbb792743f0", kill_on_drop: false }`
[INFO] [stdout] 35bd9d068b3d15a75e032651f9591e96b41f909f57ddbdd6def8bbbb792743f0