[INFO] fetching crate externc-libm 0.1.0...
[INFO] testing externc-libm-0.1.0 against 1.90.0 for beta-1.91-3
[INFO] extracting crate externc-libm 0.1.0 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate externc-libm 0.1.0
[INFO] finished tweaking crates.io crate externc-libm 0.1.0
[INFO] tweaked toml for crates.io crate externc-libm 0.1.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate externc-libm 0.1.0 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 1 package to latest compatible version
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8d64bc649f8ea853c26d70dc8f8899b9587a1ca4d2436f8d99de4859c5667967
[INFO] running `Command { std: "docker" "start" "-a" "8d64bc649f8ea853c26d70dc8f8899b9587a1ca4d2436f8d99de4859c5667967", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8d64bc649f8ea853c26d70dc8f8899b9587a1ca4d2436f8d99de4859c5667967", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d64bc649f8ea853c26d70dc8f8899b9587a1ca4d2436f8d99de4859c5667967", kill_on_drop: false }`
[INFO] [stdout] 8d64bc649f8ea853c26d70dc8f8899b9587a1ca4d2436f8d99de4859c5667967
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bcefce5a08763feddf203bd087ec7cc6a0ded1eb754d97f9bc4fc130c73f943b
[INFO] running `Command { std: "docker" "start" "-a" "bcefce5a08763feddf203bd087ec7cc6a0ded1eb754d97f9bc4fc130c73f943b", kill_on_drop: false }`
[INFO] [stderr]    Compiling libm v0.2.15
[INFO] [stderr]    Compiling externc-libm v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `extern` fn uses type `(f64, i32)`, which is not FFI-safe
[INFO] [stdout]   --> src/math/frexp.rs:12:36
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub extern "C" fn frexp(x: f64) -> (f64, i32) {
[INFO] [stdout]    |                                    ^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a struct instead
[INFO] [stdout]    = note: tuples have unspecified layout
[INFO] [stdout]    = note: `#[warn(improper_ctypes_definitions)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `(f32, i32)`, which is not FFI-safe
[INFO] [stdout]   --> src/math/frexpf.rs:12:37
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub extern "C" fn frexpf(x: f32) -> (f32, i32) {
[INFO] [stdout]    |                                     ^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a struct instead
[INFO] [stdout]    = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `(f64, i32)`, which is not FFI-safe
[INFO] [stdout]   --> src/math/lgamma_r.rs:12:39
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub extern "C" fn lgamma_r(x: f64) -> (f64, i32) {
[INFO] [stdout]    |                                       ^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a struct instead
[INFO] [stdout]    = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `(f32, i32)`, which is not FFI-safe
[INFO] [stdout]   --> src/math/lgammaf_r.rs:12:40
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub extern "C" fn lgammaf_r(x: f32) -> (f32, i32) {
[INFO] [stdout]    |                                        ^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a struct instead
[INFO] [stdout]    = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `(f64, f64)`, which is not FFI-safe
[INFO] [stdout]   --> src/math/modf.rs:12:35
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub extern "C" fn modf(x: f64) -> (f64, f64) {
[INFO] [stdout]    |                                   ^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a struct instead
[INFO] [stdout]    = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `(f32, f32)`, which is not FFI-safe
[INFO] [stdout]   --> src/math/modff.rs:12:36
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub extern "C" fn modff(x: f32) -> (f32, f32) {
[INFO] [stdout]    |                                    ^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a struct instead
[INFO] [stdout]    = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `(f64, i32)`, which is not FFI-safe
[INFO] [stdout]   --> src/math/remquo.rs:12:45
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub extern "C" fn remquo(x: f64, y: f64) -> (f64, i32) {
[INFO] [stdout]    |                                             ^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a struct instead
[INFO] [stdout]    = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `(f32, i32)`, which is not FFI-safe
[INFO] [stdout]   --> src/math/remquof.rs:12:46
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub extern "C" fn remquof(x: f32, y: f32) -> (f32, i32) {
[INFO] [stdout]    |                                              ^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a struct instead
[INFO] [stdout]    = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `(f64, f64)`, which is not FFI-safe
[INFO] [stdout]   --> src/math/sincos.rs:12:37
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub extern "C" fn sincos(x: f64) -> (f64, f64) {
[INFO] [stdout]    |                                     ^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a struct instead
[INFO] [stdout]    = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `(f32, f32)`, which is not FFI-safe
[INFO] [stdout]   --> src/math/sincosf.rs:12:38
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub extern "C" fn sincosf(x: f32) -> (f32, f32) {
[INFO] [stdout]    |                                      ^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a struct instead
[INFO] [stdout]    = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.43s
[INFO] running `Command { std: "docker" "inspect" "bcefce5a08763feddf203bd087ec7cc6a0ded1eb754d97f9bc4fc130c73f943b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bcefce5a08763feddf203bd087ec7cc6a0ded1eb754d97f9bc4fc130c73f943b", kill_on_drop: false }`
[INFO] [stdout] bcefce5a08763feddf203bd087ec7cc6a0ded1eb754d97f9bc4fc130c73f943b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d64b2f2c1a696a22f0dcd6f3ecc2d137886d525596b39cfc1fc32e79c787aa7f
[INFO] running `Command { std: "docker" "start" "-a" "d64b2f2c1a696a22f0dcd6f3ecc2d137886d525596b39cfc1fc32e79c787aa7f", kill_on_drop: false }`
[INFO] [stdout] warning: `extern` fn uses type `(f64, i32)`, which is not FFI-safe
[INFO] [stdout]   --> src/math/frexp.rs:12:36
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub extern "C" fn frexp(x: f64) -> (f64, i32) {
[INFO] [stdout]    |                                    ^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a struct instead
[INFO] [stdout]    = note: tuples have unspecified layout
[INFO] [stdout]    = note: `#[warn(improper_ctypes_definitions)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `(f32, i32)`, which is not FFI-safe
[INFO] [stdout]   --> src/math/frexpf.rs:12:37
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub extern "C" fn frexpf(x: f32) -> (f32, i32) {
[INFO] [stdout]    |                                     ^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a struct instead
[INFO] [stdout]    = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `(f64, i32)`, which is not FFI-safe
[INFO] [stdout]   --> src/math/lgamma_r.rs:12:39
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub extern "C" fn lgamma_r(x: f64) -> (f64, i32) {
[INFO] [stdout]    |                                       ^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a struct instead
[INFO] [stdout]    = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `(f32, i32)`, which is not FFI-safe
[INFO] [stdout]   --> src/math/lgammaf_r.rs:12:40
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub extern "C" fn lgammaf_r(x: f32) -> (f32, i32) {
[INFO] [stdout]    |                                        ^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a struct instead
[INFO] [stdout]    = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `(f64, f64)`, which is not FFI-safe
[INFO] [stdout]   --> src/math/modf.rs:12:35
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub extern "C" fn modf(x: f64) -> (f64, f64) {
[INFO] [stdout]    |                                   ^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a struct instead
[INFO] [stdout]    = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `(f32, f32)`, which is not FFI-safe
[INFO] [stdout]   --> src/math/modff.rs:12:36
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub extern "C" fn modff(x: f32) -> (f32, f32) {
[INFO] [stdout]    |                                    ^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a struct instead
[INFO] [stdout]    = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `(f64, i32)`, which is not FFI-safe
[INFO] [stdout]   --> src/math/remquo.rs:12:45
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub extern "C" fn remquo(x: f64, y: f64) -> (f64, i32) {
[INFO] [stdout]    |                                             ^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a struct instead
[INFO] [stdout]    = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `(f32, i32)`, which is not FFI-safe
[INFO] [stdout]   --> src/math/remquof.rs:12:46
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub extern "C" fn remquof(x: f32, y: f32) -> (f32, i32) {
[INFO] [stdout]    |                                              ^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a struct instead
[INFO] [stdout]    = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling externc-libm v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `extern` fn uses type `(f64, f64)`, which is not FFI-safe
[INFO] [stdout]   --> src/math/sincos.rs:12:37
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub extern "C" fn sincos(x: f64) -> (f64, f64) {
[INFO] [stdout]    |                                     ^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a struct instead
[INFO] [stdout]    = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `(f32, f32)`, which is not FFI-safe
[INFO] [stdout]   --> src/math/sincosf.rs:12:38
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub extern "C" fn sincosf(x: f32) -> (f32, f32) {
[INFO] [stdout]    |                                      ^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a struct instead
[INFO] [stdout]    = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `(f64, i32)`, which is not FFI-safe
[INFO] [stdout]   --> src/math/frexp.rs:12:36
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub extern "C" fn frexp(x: f64) -> (f64, i32) {
[INFO] [stdout]    |                                    ^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a struct instead
[INFO] [stdout]    = note: tuples have unspecified layout
[INFO] [stdout]    = note: `#[warn(improper_ctypes_definitions)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `(f32, i32)`, which is not FFI-safe
[INFO] [stdout]   --> src/math/frexpf.rs:12:37
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub extern "C" fn frexpf(x: f32) -> (f32, i32) {
[INFO] [stdout]    |                                     ^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a struct instead
[INFO] [stdout]    = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `(f64, i32)`, which is not FFI-safe
[INFO] [stdout]   --> src/math/lgamma_r.rs:12:39
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub extern "C" fn lgamma_r(x: f64) -> (f64, i32) {
[INFO] [stdout]    |                                       ^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a struct instead
[INFO] [stdout]    = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `(f32, i32)`, which is not FFI-safe
[INFO] [stdout]   --> src/math/lgammaf_r.rs:12:40
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub extern "C" fn lgammaf_r(x: f32) -> (f32, i32) {
[INFO] [stdout]    |                                        ^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a struct instead
[INFO] [stdout]    = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `(f64, f64)`, which is not FFI-safe
[INFO] [stdout]   --> src/math/modf.rs:12:35
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub extern "C" fn modf(x: f64) -> (f64, f64) {
[INFO] [stdout]    |                                   ^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a struct instead
[INFO] [stdout]    = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `(f32, f32)`, which is not FFI-safe
[INFO] [stdout]   --> src/math/modff.rs:12:36
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub extern "C" fn modff(x: f32) -> (f32, f32) {
[INFO] [stdout]    |                                    ^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a struct instead
[INFO] [stdout]    = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `(f64, i32)`, which is not FFI-safe
[INFO] [stdout]   --> src/math/remquo.rs:12:45
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub extern "C" fn remquo(x: f64, y: f64) -> (f64, i32) {
[INFO] [stdout]    |                                             ^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a struct instead
[INFO] [stdout]    = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `(f32, i32)`, which is not FFI-safe
[INFO] [stdout]   --> src/math/remquof.rs:12:46
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub extern "C" fn remquof(x: f32, y: f32) -> (f32, i32) {
[INFO] [stdout]    |                                              ^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a struct instead
[INFO] [stdout]    = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `(f64, f64)`, which is not FFI-safe
[INFO] [stdout]   --> src/math/sincos.rs:12:37
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub extern "C" fn sincos(x: f64) -> (f64, f64) {
[INFO] [stdout]    |                                     ^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a struct instead
[INFO] [stdout]    = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `(f32, f32)`, which is not FFI-safe
[INFO] [stdout]   --> src/math/sincosf.rs:12:38
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub extern "C" fn sincosf(x: f32) -> (f32, f32) {
[INFO] [stdout]    |                                      ^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a struct instead
[INFO] [stdout]    = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.27s
[INFO] running `Command { std: "docker" "inspect" "d64b2f2c1a696a22f0dcd6f3ecc2d137886d525596b39cfc1fc32e79c787aa7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d64b2f2c1a696a22f0dcd6f3ecc2d137886d525596b39cfc1fc32e79c787aa7f", kill_on_drop: false }`
[INFO] [stdout] d64b2f2c1a696a22f0dcd6f3ecc2d137886d525596b39cfc1fc32e79c787aa7f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] a5600d43d4db7d439ec3bef93207ee65c933bf76ca69d90d51c15e713e5cb482
[INFO] running `Command { std: "docker" "start" "-a" "a5600d43d4db7d439ec3bef93207ee65c933bf76ca69d90d51c15e713e5cb482", kill_on_drop: false }`
[INFO] [stderr] warning: `extern` fn uses type `(f64, i32)`, which is not FFI-safe
[INFO] [stderr]   --> src/math/frexp.rs:12:36
[INFO] [stderr]    |
[INFO] [stderr] 12 | pub extern "C" fn frexp(x: f64) -> (f64, i32) {
[INFO] [stderr]    |                                    ^^^^^^^^^^ not FFI-safe
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider using a struct instead
[INFO] [stderr]    = note: tuples have unspecified layout
[INFO] [stderr]    = note: `#[warn(improper_ctypes_definitions)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `extern` fn uses type `(f32, i32)`, which is not FFI-safe
[INFO] [stderr]   --> src/math/frexpf.rs:12:37
[INFO] [stderr]    |
[INFO] [stderr] 12 | pub extern "C" fn frexpf(x: f32) -> (f32, i32) {
[INFO] [stderr]    |                                     ^^^^^^^^^^ not FFI-safe
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider using a struct instead
[INFO] [stderr]    = note: tuples have unspecified layout
[INFO] [stderr] 
[INFO] [stderr] warning: `extern` fn uses type `(f64, i32)`, which is not FFI-safe
[INFO] [stderr]   --> src/math/lgamma_r.rs:12:39
[INFO] [stderr]    |
[INFO] [stderr] 12 | pub extern "C" fn lgamma_r(x: f64) -> (f64, i32) {
[INFO] [stderr]    |                                       ^^^^^^^^^^ not FFI-safe
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider using a struct instead
[INFO] [stderr]    = note: tuples have unspecified layout
[INFO] [stderr] 
[INFO] [stderr] warning: `extern` fn uses type `(f32, i32)`, which is not FFI-safe
[INFO] [stderr]   --> src/math/lgammaf_r.rs:12:40
[INFO] [stderr]    |
[INFO] [stderr] 12 | pub extern "C" fn lgammaf_r(x: f32) -> (f32, i32) {
[INFO] [stderr]    |                                        ^^^^^^^^^^ not FFI-safe
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider using a struct instead
[INFO] [stderr]    = note: tuples have unspecified layout
[INFO] [stderr] 
[INFO] [stderr] warning: `extern` fn uses type `(f64, f64)`, which is not FFI-safe
[INFO] [stderr]   --> src/math/modf.rs:12:35
[INFO] [stderr]    |
[INFO] [stderr] 12 | pub extern "C" fn modf(x: f64) -> (f64, f64) {
[INFO] [stderr]    |                                   ^^^^^^^^^^ not FFI-safe
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider using a struct instead
[INFO] [stderr]    = note: tuples have unspecified layout
[INFO] [stderr] 
[INFO] [stderr] warning: `extern` fn uses type `(f32, f32)`, which is not FFI-safe
[INFO] [stderr]   --> src/math/modff.rs:12:36
[INFO] [stderr]    |
[INFO] [stderr] 12 | pub extern "C" fn modff(x: f32) -> (f32, f32) {
[INFO] [stderr]    |                                    ^^^^^^^^^^ not FFI-safe
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider using a struct instead
[INFO] [stderr]    = note: tuples have unspecified layout
[INFO] [stderr] 
[INFO] [stderr] warning: `extern` fn uses type `(f64, i32)`, which is not FFI-safe
[INFO] [stderr]   --> src/math/remquo.rs:12:45
[INFO] [stderr]    |
[INFO] [stderr] 12 | pub extern "C" fn remquo(x: f64, y: f64) -> (f64, i32) {
[INFO] [stderr]    |                                             ^^^^^^^^^^ not FFI-safe
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider using a struct instead
[INFO] [stderr]    = note: tuples have unspecified layout
[INFO] [stderr] 
[INFO] [stderr] warning: `extern` fn uses type `(f32, i32)`, which is not FFI-safe
[INFO] [stderr]   --> src/math/remquof.rs:12:46
[INFO] [stderr]    |
[INFO] [stderr] 12 | pub extern "C" fn remquof(x: f32, y: f32) -> (f32, i32) {
[INFO] [stderr]    |                                              ^^^^^^^^^^ not FFI-safe
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider using a struct instead
[INFO] [stderr]    = note: tuples have unspecified layout
[INFO] [stderr] 
[INFO] [stderr] warning: `extern` fn uses type `(f64, f64)`, which is not FFI-safe
[INFO] [stderr]   --> src/math/sincos.rs:12:37
[INFO] [stderr]    |
[INFO] [stderr] 12 | pub extern "C" fn sincos(x: f64) -> (f64, f64) {
[INFO] [stderr]    |                                     ^^^^^^^^^^ not FFI-safe
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider using a struct instead
[INFO] [stderr]    = note: tuples have unspecified layout
[INFO] [stderr] 
[INFO] [stderr] warning: `extern` fn uses type `(f32, f32)`, which is not FFI-safe
[INFO] [stderr]   --> src/math/sincosf.rs:12:38
[INFO] [stderr]    |
[INFO] [stderr] 12 | pub extern "C" fn sincosf(x: f32) -> (f32, f32) {
[INFO] [stderr]    |                                      ^^^^^^^^^^ not FFI-safe
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider using a struct instead
[INFO] [stderr]    = note: tuples have unspecified layout
[INFO] [stderr] 
[INFO] [stderr] warning: `externc-libm` (lib) generated 10 warnings
[INFO] [stderr] warning: `externc-libm` (lib test) generated 10 warnings (10 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/externc_libm-ef9d0ada0dc300c5)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests externc_libm
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "a5600d43d4db7d439ec3bef93207ee65c933bf76ca69d90d51c15e713e5cb482", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a5600d43d4db7d439ec3bef93207ee65c933bf76ca69d90d51c15e713e5cb482", kill_on_drop: false }`
[INFO] [stdout] a5600d43d4db7d439ec3bef93207ee65c933bf76ca69d90d51c15e713e5cb482