[INFO] fetching crate drone-test 0.1.2...
[INFO] checking drone-test-0.1.2 against master#0d37dca25a51fb900a402c94c8818ad1c2789e30 for pr-77526
[INFO] extracting crate drone-test 0.1.2 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate drone-test 0.1.2 on toolchain 0d37dca25a51fb900a402c94c8818ad1c2789e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate drone-test 0.1.2
[INFO] finished tweaking crates.io crate drone-test 0.1.2
[INFO] tweaked toml for crates.io crate drone-test 0.1.2 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c56ec1d1c5685d97a464a7b832fb17e370994888d31c4d4ba225c9670d8769a9
[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" "c56ec1d1c5685d97a464a7b832fb17e370994888d31c4d4ba225c9670d8769a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c56ec1d1c5685d97a464a7b832fb17e370994888d31c4d4ba225c9670d8769a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c56ec1d1c5685d97a464a7b832fb17e370994888d31c4d4ba225c9670d8769a9", kill_on_drop: false }`
[INFO] [stdout] c56ec1d1c5685d97a464a7b832fb17e370994888d31c4d4ba225c9670d8769a9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6d08c589e4d7bc120e215c2c9e0fd575498ec8ae8c8a72d3a7da0201cc859d1a
[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" "6d08c589e4d7bc120e215c2c9e0fd575498ec8ae8c8a72d3a7da0201cc859d1a", kill_on_drop: false }`
[INFO] [stderr]     Checking sc v0.2.3
[INFO] [stderr]     Checking drone-test v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]   --> src/panicking.rs:34:3
[INFO] [stdout]    |
[INFO] [stdout] 34 |   unsafe { intrinsics::abort() }
[INFO] [stdout]    |   ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_unsafe)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `fn()`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:124:9
[INFO] [stdout]     |
[INFO] [stdout] 124 |   main: fn(),
[INFO] [stdout]     |         ^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(improper_ctypes_definitions)]` on by default
[INFO] [stdout]     = help: consider using an `extern fn(...) -> ...` function pointer instead
[INFO] [stdout]     = note: this function pointer has Rust-specific calling convention
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0152]: found duplicate lang item `start`
[INFO] [stdout]    --> src/lib.rs:123:1
[INFO] [stdout]     |
[INFO] [stdout] 123 | / extern "C" fn start(
[INFO] [stdout] 124 | |   main: fn(),
[INFO] [stdout] 125 | |   _argc: isize,
[INFO] [stdout] 126 | |   _argv: *const *const u8,
[INFO] [stdout] 127 | | ) -> isize {
[INFO] [stdout]     | |__________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the lang item is first defined in crate `std` (which `test` depends on)
[INFO] [stdout]     = note: first definition in `std` loaded from /opt/rustwide/rustup-home/toolchains/0d37dca25a51fb900a402c94c8818ad1c2789e30/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-edfba68bd3501617.rlib
[INFO] [stdout]     = note: second definition in the local crate (`drone_test`)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0152`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `drone-test`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: `extern` fn uses type `Arguments`, which is not FFI-safe
[INFO] [stdout]   --> src/panicking.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |   args: fmt::Arguments,
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `str`, which is not FFI-safe
[INFO] [stdout]   --> src/panicking.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |   file: &'static str,
[INFO] [stdout]    |         ^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using `*const u8` and a length instead
[INFO] [stdout]    = note: string slices have no C equivalent
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "6d08c589e4d7bc120e215c2c9e0fd575498ec8ae8c8a72d3a7da0201cc859d1a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d08c589e4d7bc120e215c2c9e0fd575498ec8ae8c8a72d3a7da0201cc859d1a", kill_on_drop: false }`
[INFO] [stdout] 6d08c589e4d7bc120e215c2c9e0fd575498ec8ae8c8a72d3a7da0201cc859d1a