[INFO] crate proptest 0.10.0 is already in cache
[INFO] checking proptest-0.10.0 against master#8ac1525e091d3db28e67adcbbd6db1e1deaa37fb for pr-73323
[INFO] extracting crate proptest 0.10.0 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate proptest 0.10.0 on toolchain 8ac1525e091d3db28e67adcbbd6db1e1deaa37fb
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8ac1525e091d3db28e67adcbbd6db1e1deaa37fb" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate proptest 0.10.0
[INFO] finished tweaking crates.io crate proptest 0.10.0
[INFO] tweaked toml for crates.io crate proptest 0.10.0 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate crates.io crate proptest 0.10.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8ac1525e091d3db28e67adcbbd6db1e1deaa37fb" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "+8ac1525e091d3db28e67adcbbd6db1e1deaa37fb" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1fba4167dd4a14471ac26e8344e6ea49db6d5a4ea360218f01768c7489a54d19
[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" "1fba4167dd4a14471ac26e8344e6ea49db6d5a4ea360218f01768c7489a54d19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1fba4167dd4a14471ac26e8344e6ea49db6d5a4ea360218f01768c7489a54d19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1fba4167dd4a14471ac26e8344e6ea49db6d5a4ea360218f01768c7489a54d19", kill_on_drop: false }`
[INFO] [stdout] 1fba4167dd4a14471ac26e8344e6ea49db6d5a4ea360218f01768c7489a54d19
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "RUSTFLAGS=--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" "+8ac1525e091d3db28e67adcbbd6db1e1deaa37fb" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2cdd556cac2c23f32e4316742111cf138ff8c2bc3dd9819957f0d754a4eded6e
[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" "2cdd556cac2c23f32e4316742111cf138ff8c2bc3dd9819957f0d754a4eded6e", kill_on_drop: false }`
[INFO] [stderr]     Checking remove_dir_all v0.5.2
[INFO] [stderr]     Checking regex-syntax v0.6.17
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]     Checking aho-corasick v0.7.10
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand_xorshift v0.2.0
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking rusty-fork v0.3.0
[INFO] [stderr]     Checking regex v1.3.7
[INFO] [stderr]     Checking proptest v0.10.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `extern` fn uses type `impl strategy::traits::Strategy`, which is not FFI-safe
[INFO] [stdout]     --> src/sugar.rs:618:21
[INFO] [stdout]      |
[INFO] [stdout] 618  |                    -> impl $crate::strategy::Strategy<Value = $return_type> {
[INFO] [stdout]      |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout] ...
[INFO] [stdout] 1170 | /     prop_compose! {
[INFO] [stdout] 1171 | |         /// These are docs!
[INFO] [stdout] 1172 | |         #[allow(dead_code)]
[INFO] [stdout] 1173 | |         pub [extern "C"] fn two_ints_pub_with_attrs
[INFO] [stdout] ...    |
[INFO] [stdout] 1178 | |         }
[INFO] [stdout] 1179 | |     }
[INFO] [stdout]      | |_____- in this macro invocation
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(improper_ctypes_definitions)]` on by default
[INFO] [stdout]      = note: opaque types have no C equivalent
[INFO] [stdout]      = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `impl strategy::traits::Strategy`, which is not FFI-safe
[INFO] [stdout]     --> src/sugar.rs:618:21
[INFO] [stdout]      |
[INFO] [stdout] 618  |                    -> impl $crate::strategy::Strategy<Value = $return_type> {
[INFO] [stdout]      |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout] ...
[INFO] [stdout] 1181 | /     prop_compose! {
[INFO] [stdout] 1182 | |         // The only modifier we can usefully put here is "unsafe", but we want
[INFO] [stdout] 1183 | |         // to keep this crate unsafe-free, even nominally. "const" may
[INFO] [stdout] 1184 | |         // eventually work, but is not allowed right now since the generated
[INFO] [stdout] ...    |
[INFO] [stdout] 1190 | |         }
[INFO] [stdout] 1191 | |     }
[INFO] [stdout]      | |_____- in this macro invocation
[INFO] [stdout]      |
[INFO] [stdout]      = note: opaque types have no C equivalent
[INFO] [stdout]      = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 28.10s
[INFO] running `Command { std: "docker" "inspect" "2cdd556cac2c23f32e4316742111cf138ff8c2bc3dd9819957f0d754a4eded6e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2cdd556cac2c23f32e4316742111cf138ff8c2bc3dd9819957f0d754a4eded6e", kill_on_drop: false }`
[INFO] [stdout] 2cdd556cac2c23f32e4316742111cf138ff8c2bc3dd9819957f0d754a4eded6e