[INFO] fetching crate rbx_mantle 0.10.6...
[INFO] checking rbx_mantle-0.10.6 against try#438eb4c1a1c3841523d7f672601e8adbe04cff28 for pr-147589-1
[INFO] extracting crate rbx_mantle 0.10.6 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate rbx_mantle 0.10.6
[INFO] finished tweaking crates.io crate rbx_mantle 0.10.6
[INFO] tweaked toml for crates.io crate rbx_mantle 0.10.6 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rbx_mantle 0.10.6 on toolchain 438eb4c1a1c3841523d7f672601e8adbe04cff28
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+438eb4c1a1c3841523d7f672601e8adbe04cff28" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate rbx_mantle 0.10.6 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+438eb4c1a1c3841523d7f672601e8adbe04cff28" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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" "+438eb4c1a1c3841523d7f672601e8adbe04cff28" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cd1a4ca191d6e42cbc25072624149d69d92864bc6e2d6b5223ba9b9a8002a732
[INFO] running `Command { std: "docker" "start" "-a" "cd1a4ca191d6e42cbc25072624149d69d92864bc6e2d6b5223ba9b9a8002a732", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cd1a4ca191d6e42cbc25072624149d69d92864bc6e2d6b5223ba9b9a8002a732", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cd1a4ca191d6e42cbc25072624149d69d92864bc6e2d6b5223ba9b9a8002a732", kill_on_drop: false }`
[INFO] [stdout] cd1a4ca191d6e42cbc25072624149d69d92864bc6e2d6b5223ba9b9a8002a732
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+438eb4c1a1c3841523d7f672601e8adbe04cff28" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 79e547cd2d8904120d6535b971bf73ce103cdc144f59494dba97134ec6c62ccd
[INFO] running `Command { std: "docker" "start" "-a" "79e547cd2d8904120d6535b971bf73ce103cdc144f59494dba97134ec6c62ccd", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.105
[INFO] [stderr]    Compiling proc-macro2 v1.0.30
[INFO] [stderr]    Compiling syn v1.0.80
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking smallvec v1.7.0
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling parking_lot_core v0.8.5
[INFO] [stderr]     Checking instant v0.1.12
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]     Checking lock_api v0.4.5
[INFO] [stderr]    Compiling ppv-lite86 v0.2.15
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling futures-core v0.3.17
[INFO] [stderr]    Compiling siphasher v0.3.7
[INFO] [stderr]    Compiling futures-macro v0.3.17
[INFO] [stderr]    Compiling futures-channel v0.3.17
[INFO] [stderr]    Compiling phf_shared v0.8.0
[INFO] [stderr]     Checking futures-sink v0.3.17
[INFO] [stderr]    Compiling futures-task v0.3.17
[INFO] [stderr]    Compiling tokio v1.13.0
[INFO] [stderr]    Compiling futures-util v0.3.17
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]    Compiling pkg-config v0.3.22
[INFO] [stderr]     Checking parking_lot v0.11.2
[INFO] [stderr]    Compiling typenum v1.14.0
[INFO] [stderr]    Compiling cc v1.0.71
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]    Compiling rand_pcg v0.2.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking mio v0.7.14
[INFO] [stderr]    Compiling generic-array v0.14.4
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]     Checking futures-io v0.3.17
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]     Checking http v0.2.5
[INFO] [stderr]    Compiling standback v0.2.17
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling serde_json v1.0.68
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]     Checking socket2 v0.4.2
[INFO] [stderr]    Compiling openssl-sys v0.9.70
[INFO] [stderr]     Checking httpdate v1.0.1
[INFO] [stderr]     Checking tinyvec v1.5.0
[INFO] [stderr]    Compiling phf_generator v0.8.0
[INFO] [stderr]     Checking new_debug_unreachable v1.0.4
[INFO] [stderr]    Compiling phf_codegen v0.8.0
[INFO] [stderr]    Compiling const_fn v0.4.8
[INFO] [stderr]    Compiling openssl v0.10.38
[INFO] [stderr]    Compiling native-tls v0.2.8
[INFO] [stderr]     Checking digest v0.9.0
[INFO] [stderr]    Compiling async-trait v0.1.51
[INFO] [stderr]     Checking block-buffer v0.9.0
[INFO] [stderr]    Compiling string_cache_codegen v0.5.1
[INFO] [stderr]     Checking num-integer v0.1.44
[INFO] [stderr]     Checking dirs-sys-next v0.1.2
[INFO] [stderr]     Checking unicode-normalization v0.1.19
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]    Compiling time v0.2.27
[INFO] [stderr]     Checking mac v0.1.1
[INFO] [stderr]     Checking crypto-mac v0.11.1
[INFO] [stderr]     Checking futf v0.1.4
[INFO] [stderr]    Compiling markup5ever v0.10.1
[INFO] [stderr]     Checking dirs-next v2.0.0
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]    Compiling cookie v0.15.1
[INFO] [stderr]    Compiling crc32fast v1.2.1
[INFO] [stderr]     Checking zeroize v1.4.3
[INFO] [stderr]     Checking shlex v1.1.0
[INFO] [stderr]     Checking cpufeatures v0.2.1
[INFO] [stderr]    Compiling mime_guess v2.0.3
[INFO] [stderr]     Checking sha2 v0.9.8
[INFO] [stderr]     Checking tendril v0.4.2
[INFO] [stderr]     Checking http-body v0.4.4
[INFO] [stderr]    Compiling rusoto_core v0.47.0
[INFO] [stderr]     Checking hmac v0.11.0
[INFO] [stderr]     Checking dtoa-short v0.3.3
[INFO] [stderr]     Checking idna v0.2.3
[INFO] [stderr]     Checking md-5 v0.9.1
[INFO] [stderr]    Compiling selectors v0.22.0
[INFO] [stderr]    Compiling convert_case v0.4.0
[INFO] [stderr]     Checking psl-types v2.0.7
[INFO] [stderr]    Compiling encoding_rs v0.8.29
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking servo_arc v0.1.1
[INFO] [stderr]     Checking fxhash v0.2.1
[INFO] [stderr]     Checking xml-rs v0.8.4
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking ego-tree v0.6.2
[INFO] [stderr]     Checking yansi v0.5.0
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking publicsuffix v2.1.1
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]    Compiling tokio-macros v1.5.1
[INFO] [stderr]    Compiling phf_macros v0.8.0
[INFO] [stderr]    Compiling time-macros-impl v0.1.2
[INFO] [stderr]    Compiling cssparser v0.27.2
[INFO] [stderr]    Compiling cssparser-macros v0.6.0
[INFO] [stderr]    Compiling html5ever v0.25.1
[INFO] [stderr]     Checking time-macros v0.1.1
[INFO] [stderr]     Checking phf v0.8.0
[INFO] [stderr]    Compiling derive_more v0.99.16
[INFO] [stderr]    Compiling serde_repr v0.1.7
[INFO] [stderr]     Checking futures-executor v0.3.17
[INFO] [stderr]     Checking futures v0.3.17
[INFO] [stderr]     Checking tokio-util v0.6.9
[INFO] [stderr]     Checking tokio-native-tls v0.3.0
[INFO] [stderr]     Checking h2 v0.3.7
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking string_cache v0.8.2
[INFO] [stderr]     Checking url v2.2.2
[INFO] [stderr]     Checking serde_urlencoded v0.7.0
[INFO] [stderr]     Checking serde_yaml v0.8.21
[INFO] [stderr]     Checking cookie_store v0.15.0
[INFO] [stderr]     Checking hyper v0.14.14
[INFO] [stderr]     Checking scraper v0.12.0
[INFO] [stdout] error: zero-sized fields in `repr(transparent)` cannot contain external non-exhaustive types
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/hyper-0.14.14/src/proto/h2/mod.rs:452:5
[INFO] [stdout]     |
[INFO] [stdout] 452 |     impossible: Impossible,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this field contains `Impossible`, which is not inhabited, and makes it not a breaking change to become non-zero-sized in the future.
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `hyper` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "79e547cd2d8904120d6535b971bf73ce103cdc144f59494dba97134ec6c62ccd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79e547cd2d8904120d6535b971bf73ce103cdc144f59494dba97134ec6c62ccd", kill_on_drop: false }`
[INFO] [stdout] 79e547cd2d8904120d6535b971bf73ce103cdc144f59494dba97134ec6c62ccd