[INFO] cloning repository https://github.com/trevorrobertsjr/rust-sqs-producer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/trevorrobertsjr/rust-sqs-producer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftrevorrobertsjr%2Frust-sqs-producer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftrevorrobertsjr%2Frust-sqs-producer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 90492c386b79a22ca483f1a4c6df6119c5b48366
[INFO] checking trevorrobertsjr/rust-sqs-producer against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftrevorrobertsjr%2Frust-sqs-producer" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/trevorrobertsjr/rust-sqs-producer on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/trevorrobertsjr/rust-sqs-producer
[INFO] finished tweaking git repo https://github.com/trevorrobertsjr/rust-sqs-producer
[INFO] tweaked toml for git repo https://github.com/trevorrobertsjr/rust-sqs-producer written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/trevorrobertsjr/rust-sqs-producer 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/awslabs/aws-sdk-rust`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Updating git repository `https://github.com/rcoh/sigv4`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tracing-log v0.1.2
[INFO] [stderr]   Downloaded tracing-attributes v0.1.15
[INFO] [stderr]   Downloaded serde_derive v1.0.126
[INFO] [stderr]   Downloaded tracing-core v0.1.18
[INFO] [stderr]   Downloaded tracing-serde v0.1.2
[INFO] [stderr]   Downloaded urlencoding v1.3.3
[INFO] [stderr]   Downloaded futures-channel v0.3.16
[INFO] [stderr]   Downloaded tracing-subscriber v0.2.19
[INFO] [stderr]   Downloaded fastrand v1.5.0
[INFO] [stderr]   Downloaded ct-logs v0.8.0
[INFO] [stderr]   Downloaded security-framework-sys v2.3.0
[INFO] [stderr]   Downloaded openssl-probe v0.1.4
[INFO] [stderr]   Downloaded core-foundation-sys v0.8.2
[INFO] [stderr]   Downloaded extend v0.1.2
[INFO] [stderr]   Downloaded assert-json-diff v1.1.0
[INFO] [stderr]   Downloaded schannel v0.1.19
[INFO] [stderr]   Downloaded bumpalo v3.7.0
[INFO] [stderr]   Downloaded http v0.2.4
[INFO] [stderr]   Downloaded hyper v0.14.11
[INFO] [stderr]   Downloaded tokio v1.9.0
[INFO] [stderr]   Downloaded web-sys v0.3.51
[INFO] [stderr]   Downloaded libc v0.2.98
[INFO] [stderr]   Downloaded tokio-util v0.6.7
[INFO] [stderr]   Downloaded mio v0.7.13
[INFO] [stderr]   Downloaded aho-corasick v0.7.18
[INFO] [stderr]   Downloaded wasm-bindgen v0.2.74
[INFO] [stderr]   Downloaded pest v2.1.3
[INFO] [stderr]   Downloaded futures-util v0.3.16
[INFO] [stderr]   Downloaded h2 v0.3.3
[INFO] [stderr]   Downloaded pin-project v1.0.8
[INFO] [stderr]   Downloaded memchr v2.4.0
[INFO] [stderr]   Downloaded serde_json v1.0.64
[INFO] [stderr]   Downloaded core-foundation v0.9.1
[INFO] [stderr]   Downloaded security-framework v2.3.1
[INFO] [stderr]   Downloaded rustls-native-certs v0.5.0
[INFO] [stderr]   Downloaded pretty_assertions v0.7.2
[INFO] [stderr]   Downloaded roxmltree v0.14.1
[INFO] [stderr]   Downloaded tower v0.4.8
[INFO] [stderr]   Downloaded cc v1.0.69
[INFO] [stderr]   Downloaded js-sys v0.3.51
[INFO] [stderr]   Downloaded ucd-trie v0.1.3
[INFO] [stderr]   Downloaded socket2 v0.4.0
[INFO] [stderr]   Downloaded ctor v0.1.20
[INFO] [stderr]   Downloaded diff v0.1.12
[INFO] [stderr]   Downloaded wasm-bindgen-backend v0.2.74
[INFO] [stderr]   Downloaded wasm-bindgen-macro-support v0.2.74
[INFO] [stderr]   Downloaded wasm-bindgen-macro v0.2.74
[INFO] [stderr]   Downloaded bytes-utils v0.1.1
[INFO] [stderr]   Downloaded futures-macro v0.3.16
[INFO] [stderr]   Downloaded futures-task v0.3.16
[INFO] [stderr]   Downloaded httparse v1.4.1
[INFO] [stderr]   Downloaded pin-project-internal v1.0.8
[INFO] [stderr]   Downloaded futures-core v0.3.16
[INFO] [stderr]   Downloaded futures-sink v0.3.16
[INFO] [stderr]   Downloaded xmlparser v0.13.3
[INFO] [stderr]   Downloaded parking_lot_core v0.8.3
[INFO] [stderr]   Downloaded parking_lot v0.11.1
[INFO] [stderr]   Downloaded output_vt100 v0.1.2
[INFO] [stderr]   Downloaded tower-layer v0.3.1
[INFO] [stderr]   Downloaded bytes v1.0.1
[INFO] [stderr]   Downloaded lock_api v0.4.4
[INFO] [stderr]   Downloaded matchers v0.0.1
[INFO] [stderr]   Downloaded wasm-bindgen-shared v0.2.74
[INFO] [stderr]   Downloaded slab v0.4.3
[INFO] [stderr]   Downloaded http-body v0.4.2
[INFO] [stderr]   Downloaded httpdate v1.0.1
[INFO] [stderr]   Downloaded instant v0.1.10
[INFO] [stderr]   Downloaded redox_syscall v0.2.9
[INFO] [stderr]   Downloaded tokio-macros v1.3.0
[INFO] [stderr]   Downloaded sharded-slab v0.1.1
[INFO] [stderr]   Downloaded smallvec v1.6.1
[INFO] [stderr]   Downloaded tracing v0.1.26
[INFO] [stderr]   Downloaded serde v1.0.126
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b09b8955165ee11a64e0b67cd18de1869b73dc8544e884fac948ae27bcfb1150
[INFO] running `Command { std: "docker" "start" "-a" "b09b8955165ee11a64e0b67cd18de1869b73dc8544e884fac948ae27bcfb1150", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b09b8955165ee11a64e0b67cd18de1869b73dc8544e884fac948ae27bcfb1150", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b09b8955165ee11a64e0b67cd18de1869b73dc8544e884fac948ae27bcfb1150", kill_on_drop: false }`
[INFO] [stdout] b09b8955165ee11a64e0b67cd18de1869b73dc8544e884fac948ae27bcfb1150
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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=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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dc8be8e05e769406f7e90dbce3c1ce93c569f4ffe682bc476ebb2cd8acbb4d8b
[INFO] running `Command { std: "docker" "start" "-a" "dc8be8e05e769406f7e90dbce3c1ce93c569f4ffe682bc476ebb2cd8acbb4d8b", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]     Checking bytes v1.0.1
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]     Checking smallvec v1.6.1
[INFO] [stderr]    Compiling futures-core v0.3.16
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking instant v0.1.10
[INFO] [stderr]     Checking tracing-core v0.1.18
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling tokio v1.9.0
[INFO] [stderr]    Compiling futures-macro v0.3.16
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]     Checking lock_api v0.4.4
[INFO] [stderr]    Compiling futures-task v0.3.16
[INFO] [stderr]    Compiling futures-util v0.3.16
[INFO] [stderr]    Compiling cc v1.0.69
[INFO] [stderr]     Checking slab v0.4.3
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]    Compiling futures-channel v0.3.16
[INFO] [stderr]     Checking http v0.2.4
[INFO] [stderr]     Checking futures-sink v0.3.16
[INFO] [stderr]    Compiling httparse v1.4.1
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]     Checking httpdate v1.0.1
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]     Checking matches v0.1.8
[INFO] [stderr]     Checking xmlparser v0.13.3
[INFO] [stderr]     Checking form_urlencoded v1.0.1
[INFO] [stderr]     Checking bytes-utils v0.1.1
[INFO] [stderr]    Compiling pest v2.1.3
[INFO] [stderr]     Checking diff v0.1.12
[INFO] [stderr]     Checking openssl-probe v0.1.4
[INFO] [stderr]     Checking tower-layer v0.3.1
[INFO] [stderr]     Checking roxmltree v0.14.1
[INFO] [stderr]     Checking parking_lot_core v0.8.3
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking mio v0.7.13
[INFO] [stderr]     Checking socket2 v0.4.0
[INFO] [stderr]     Checking pretty_assertions v0.7.2
[INFO] [stderr]     Checking zeroize v1.4.1
[INFO] [stderr]     Checking hex v0.4.3
[INFO] [stderr]     Checking fastrand v1.5.0
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]     Checking urlencoding v1.3.3
[INFO] [stderr]     Checking tracing-log v0.1.2
[INFO] [stderr]     Checking sharded-slab v0.1.1
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling ring v0.16.20
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]    Compiling semver-parser v0.10.2
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling semver v0.11.0
[INFO] [stderr]    Compiling rustc_version v0.3.3
[INFO] [stderr]     Checking smithy-types v0.0.1 (https://github.com/awslabs/aws-sdk-rust?tag=v0.0.12-alpha#d61aa957)
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]    Compiling aws-types v0.1.0 (https://github.com/awslabs/aws-sdk-rust?tag=v0.0.12-alpha#d61aa957)
[INFO] [stderr]     Checking http-body v0.4.2
[INFO] [stderr]     Checking smithy-query v0.1.0 (https://github.com/awslabs/aws-sdk-rust?tag=v0.0.12-alpha#d61aa957)
[INFO] [stderr]     Checking matchers v0.0.1
[INFO] [stderr]     Checking sct v0.6.1
[INFO] [stderr]     Checking webpki v0.21.4
[INFO] [stderr]     Checking ct-logs v0.8.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking rustls v0.19.1
[INFO] [stderr]    Compiling tokio-macros v1.3.0
[INFO] [stderr]    Compiling tracing-attributes v0.1.15
[INFO] [stderr]    Compiling thiserror-impl v1.0.26
[INFO] [stderr]    Compiling pin-project-internal v1.0.8
[INFO] [stderr]    Compiling extend v0.1.2
[INFO] [stderr]     Checking rustls-native-certs v0.5.0
[INFO] [stderr]     Checking tracing v0.1.26
[INFO] [stderr]     Checking thiserror v1.0.26
[INFO] [stderr]     Checking smithy-xml v0.1.0 (https://github.com/awslabs/aws-sdk-rust?tag=v0.0.12-alpha#d61aa957)
[INFO] [stderr]     Checking pin-project v1.0.8
[INFO] [stderr]     Checking tokio-util v0.6.7
[INFO] [stderr]     Checking tower v0.4.8
[INFO] [stderr]     Checking tokio-rustls v0.22.0
[INFO] [stderr]     Checking h2 v0.3.3
[INFO] [stderr]     Checking serde_urlencoded v0.7.0
[INFO] [stderr]     Checking tracing-serde v0.1.2
[INFO] [stderr]     Checking aws-sigv4 v0.1.0 (https://github.com/rcoh/sigv4?rev=66b1646a7ab119c73be966ca70ee5f556bd8379b#66b1646a)
[INFO] [stderr]     Checking assert-json-diff v1.1.0
[INFO] [stderr]     Checking tracing-subscriber v0.2.19
[INFO] [stderr]     Checking protocol-test-helpers v0.1.0 (https://github.com/awslabs/aws-sdk-rust?tag=v0.0.12-alpha#d61aa957)
[INFO] [stderr]     Checking hyper v0.14.11
[INFO] [stderr]     Checking smithy-http v0.0.1 (https://github.com/awslabs/aws-sdk-rust?tag=v0.0.12-alpha#d61aa957)
[INFO] [stderr]     Checking hyper-rustls v0.22.1
[INFO] [stderr]     Checking smithy-http-tower v0.1.0 (https://github.com/awslabs/aws-sdk-rust?tag=v0.0.12-alpha#d61aa957)
[INFO] [stderr]     Checking aws-auth v0.1.0 (https://github.com/awslabs/aws-sdk-rust?tag=v0.0.12-alpha#d61aa957)
[INFO] [stderr]     Checking aws-http v0.1.0 (https://github.com/awslabs/aws-sdk-rust?tag=v0.0.12-alpha#d61aa957)
[INFO] [stderr]     Checking aws-endpoint v0.1.0 (https://github.com/awslabs/aws-sdk-rust?tag=v0.0.12-alpha#d61aa957)
[INFO] [stderr]     Checking aws-sig-auth v0.1.0 (https://github.com/awslabs/aws-sdk-rust?tag=v0.0.12-alpha#d61aa957)
[INFO] [stderr]     Checking smithy-client v0.1.0 (https://github.com/awslabs/aws-sdk-rust?tag=v0.0.12-alpha#d61aa957)
[INFO] [stderr]     Checking aws-hyper v0.1.0 (https://github.com/awslabs/aws-sdk-rust?tag=v0.0.12-alpha#d61aa957)
[INFO] [stderr]     Checking aws-sdk-sqs v0.0.12-alpha (https://github.com/awslabs/aws-sdk-rust?tag=v0.0.12-alpha#d61aa957)
[INFO] [stderr]     Checking rust-sqs-golang-dynamodb v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 21.08s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: aws-types v0.1.0 (https://github.com/awslabs/aws-sdk-rust?tag=v0.0.12-alpha#d61aa957)
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "dc8be8e05e769406f7e90dbce3c1ce93c569f4ffe682bc476ebb2cd8acbb4d8b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dc8be8e05e769406f7e90dbce3c1ce93c569f4ffe682bc476ebb2cd8acbb4d8b", kill_on_drop: false }`
[INFO] [stdout] dc8be8e05e769406f7e90dbce3c1ce93c569f4ffe682bc476ebb2cd8acbb4d8b
[INFO] checking trevorrobertsjr/rust-sqs-producer against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftrevorrobertsjr%2Frust-sqs-producer" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/trevorrobertsjr/rust-sqs-producer on toolchain 3a4bc97f6385a3aa300a4fd689b44350e54fd676
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/trevorrobertsjr/rust-sqs-producer
[INFO] finished tweaking git repo https://github.com/trevorrobertsjr/rust-sqs-producer
[INFO] tweaked toml for git repo https://github.com/trevorrobertsjr/rust-sqs-producer written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/trevorrobertsjr/rust-sqs-producer 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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b392a6d47444ebf8b323d272fd6432693cf5894c52de47b90a4f429cda0d8137
[INFO] running `Command { std: "docker" "start" "-a" "b392a6d47444ebf8b323d272fd6432693cf5894c52de47b90a4f429cda0d8137", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b392a6d47444ebf8b323d272fd6432693cf5894c52de47b90a4f429cda0d8137", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b392a6d47444ebf8b323d272fd6432693cf5894c52de47b90a4f429cda0d8137", kill_on_drop: false }`
[INFO] [stdout] b392a6d47444ebf8b323d272fd6432693cf5894c52de47b90a4f429cda0d8137
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ab5a3c19b61c46758f2ad0a017cb97587eaa356ceee38789cd2b904ba68c8c39
[INFO] running `Command { std: "docker" "start" "-a" "ab5a3c19b61c46758f2ad0a017cb97587eaa356ceee38789cd2b904ba68c8c39", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]     Checking bytes v1.0.1
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]     Checking smallvec v1.6.1
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling futures-core v0.3.16
[INFO] [stderr]     Checking instant v0.1.10
[INFO] [stderr]    Compiling tokio v1.9.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]     Checking tracing-core v0.1.18
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling futures-macro v0.3.16
[INFO] [stderr]     Checking lock_api v0.4.4
[INFO] [stderr]    Compiling futures-task v0.3.16
[INFO] [stderr]    Compiling futures-util v0.3.16
[INFO] [stderr]    Compiling cc v1.0.69
[INFO] [stdout] error[E0284]: type annotations needed: cannot satisfy `_ -> _`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/bytes-1.0.1/src/buf/buf_impl.rs:23:9
[INFO] [stdout]     |
[INFO] [stdout] 23  | /         if let Some(ret) = ret {
[INFO] [stdout] 24  | |             // if the direct conversion was possible, advance and return
[INFO] [stdout] 25  | |             $this.advance(SIZE);
[INFO] [stdout] 26  | |             return ret;
[INFO] [stdout] ...   |
[INFO] [stdout] 31  | |             return $typ::$conv(buf);
[INFO] [stdout] 32  | |         }
[INFO] [stdout]     | |_________^ cannot satisfy `_ -> _`
[INFO] [stdout] ...
[INFO] [stdout] 331 |           buf_get_impl!(self, u16::from_be_bytes);
[INFO] [stdout]     |           --------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `buf_get_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0284]: type annotations needed: cannot satisfy `_ -> _`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/bytes-1.0.1/src/buf/buf_impl.rs:23:9
[INFO] [stdout]     |
[INFO] [stdout] 23  | /         if let Some(ret) = ret {
[INFO] [stdout] 24  | |             // if the direct conversion was possible, advance and return
[INFO] [stdout] 25  | |             $this.advance(SIZE);
[INFO] [stdout] 26  | |             return ret;
[INFO] [stdout] ...   |
[INFO] [stdout] 31  | |             return $typ::$conv(buf);
[INFO] [stdout] 32  | |         }
[INFO] [stdout]     | |_________^ cannot satisfy `_ -> _`
[INFO] [stdout] ...
[INFO] [stdout] 351 |           buf_get_impl!(self, u16::from_le_bytes);
[INFO] [stdout]     |           --------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `buf_get_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0284]: type annotations needed: cannot satisfy `_ -> _`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/bytes-1.0.1/src/buf/buf_impl.rs:23:9
[INFO] [stdout]     |
[INFO] [stdout] 23  | /         if let Some(ret) = ret {
[INFO] [stdout] 24  | |             // if the direct conversion was possible, advance and return
[INFO] [stdout] 25  | |             $this.advance(SIZE);
[INFO] [stdout] 26  | |             return ret;
[INFO] [stdout] ...   |
[INFO] [stdout] 31  | |             return $typ::$conv(buf);
[INFO] [stdout] 32  | |         }
[INFO] [stdout]     | |_________^ cannot satisfy `_ -> _`
[INFO] [stdout] ...
[INFO] [stdout] 371 |           buf_get_impl!(self, i16::from_be_bytes);
[INFO] [stdout]     |           --------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `buf_get_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0284]: type annotations needed: cannot satisfy `_ -> _`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/bytes-1.0.1/src/buf/buf_impl.rs:23:9
[INFO] [stdout]     |
[INFO] [stdout] 23  | /         if let Some(ret) = ret {
[INFO] [stdout] 24  | |             // if the direct conversion was possible, advance and return
[INFO] [stdout] 25  | |             $this.advance(SIZE);
[INFO] [stdout] 26  | |             return ret;
[INFO] [stdout] ...   |
[INFO] [stdout] 31  | |             return $typ::$conv(buf);
[INFO] [stdout] 32  | |         }
[INFO] [stdout]     | |_________^ cannot satisfy `_ -> _`
[INFO] [stdout] ...
[INFO] [stdout] 391 |           buf_get_impl!(self, i16::from_le_bytes);
[INFO] [stdout]     |           --------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `buf_get_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0284]: type annotations needed: cannot satisfy `_ -> _`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/bytes-1.0.1/src/buf/buf_impl.rs:23:9
[INFO] [stdout]     |
[INFO] [stdout] 23  | /         if let Some(ret) = ret {
[INFO] [stdout] 24  | |             // if the direct conversion was possible, advance and return
[INFO] [stdout] 25  | |             $this.advance(SIZE);
[INFO] [stdout] 26  | |             return ret;
[INFO] [stdout] ...   |
[INFO] [stdout] 31  | |             return $typ::$conv(buf);
[INFO] [stdout] 32  | |         }
[INFO] [stdout]     | |_________^ cannot satisfy `_ -> _`
[INFO] [stdout] ...
[INFO] [stdout] 411 |           buf_get_impl!(self, u32::from_be_bytes);
[INFO] [stdout]     |           --------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `buf_get_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0284]: type annotations needed: cannot satisfy `_ -> _`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/bytes-1.0.1/src/buf/buf_impl.rs:23:9
[INFO] [stdout]     |
[INFO] [stdout] 23  | /         if let Some(ret) = ret {
[INFO] [stdout] 24  | |             // if the direct conversion was possible, advance and return
[INFO] [stdout] 25  | |             $this.advance(SIZE);
[INFO] [stdout] 26  | |             return ret;
[INFO] [stdout] ...   |
[INFO] [stdout] 31  | |             return $typ::$conv(buf);
[INFO] [stdout] 32  | |         }
[INFO] [stdout]     | |_________^ cannot satisfy `_ -> _`
[INFO] [stdout] ...
[INFO] [stdout] 431 |           buf_get_impl!(self, u32::from_le_bytes);
[INFO] [stdout]     |           --------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `buf_get_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0284]: type annotations needed: cannot satisfy `_ -> _`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/bytes-1.0.1/src/buf/buf_impl.rs:23:9
[INFO] [stdout]     |
[INFO] [stdout] 23  | /         if let Some(ret) = ret {
[INFO] [stdout] 24  | |             // if the direct conversion was possible, advance and return
[INFO] [stdout] 25  | |             $this.advance(SIZE);
[INFO] [stdout] 26  | |             return ret;
[INFO] [stdout] ...   |
[INFO] [stdout] 31  | |             return $typ::$conv(buf);
[INFO] [stdout] 32  | |         }
[INFO] [stdout]     | |_________^ cannot satisfy `_ -> _`
[INFO] [stdout] ...
[INFO] [stdout] 451 |           buf_get_impl!(self, i32::from_be_bytes);
[INFO] [stdout]     |           --------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `buf_get_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0284]: type annotations needed: cannot satisfy `_ -> _`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/bytes-1.0.1/src/buf/buf_impl.rs:23:9
[INFO] [stdout]     |
[INFO] [stdout] 23  | /         if let Some(ret) = ret {
[INFO] [stdout] 24  | |             // if the direct conversion was possible, advance and return
[INFO] [stdout] 25  | |             $this.advance(SIZE);
[INFO] [stdout] 26  | |             return ret;
[INFO] [stdout] ...   |
[INFO] [stdout] 31  | |             return $typ::$conv(buf);
[INFO] [stdout] 32  | |         }
[INFO] [stdout]     | |_________^ cannot satisfy `_ -> _`
[INFO] [stdout] ...
[INFO] [stdout] 471 |           buf_get_impl!(self, i32::from_le_bytes);
[INFO] [stdout]     |           --------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `buf_get_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0284]: type annotations needed: cannot satisfy `_ -> _`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/bytes-1.0.1/src/buf/buf_impl.rs:23:9
[INFO] [stdout]     |
[INFO] [stdout] 23  | /         if let Some(ret) = ret {
[INFO] [stdout] 24  | |             // if the direct conversion was possible, advance and return
[INFO] [stdout] 25  | |             $this.advance(SIZE);
[INFO] [stdout] 26  | |             return ret;
[INFO] [stdout] ...   |
[INFO] [stdout] 31  | |             return $typ::$conv(buf);
[INFO] [stdout] 32  | |         }
[INFO] [stdout]     | |_________^ cannot satisfy `_ -> _`
[INFO] [stdout] ...
[INFO] [stdout] 491 |           buf_get_impl!(self, u64::from_be_bytes);
[INFO] [stdout]     |           --------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `buf_get_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0284]: type annotations needed: cannot satisfy `_ -> _`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/bytes-1.0.1/src/buf/buf_impl.rs:23:9
[INFO] [stdout]     |
[INFO] [stdout] 23  | /         if let Some(ret) = ret {
[INFO] [stdout] 24  | |             // if the direct conversion was possible, advance and return
[INFO] [stdout] 25  | |             $this.advance(SIZE);
[INFO] [stdout] 26  | |             return ret;
[INFO] [stdout] ...   |
[INFO] [stdout] 31  | |             return $typ::$conv(buf);
[INFO] [stdout] 32  | |         }
[INFO] [stdout]     | |_________^ cannot satisfy `_ -> _`
[INFO] [stdout] ...
[INFO] [stdout] 511 |           buf_get_impl!(self, u64::from_le_bytes);
[INFO] [stdout]     |           --------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `buf_get_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0284]: type annotations needed: cannot satisfy `_ -> _`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/bytes-1.0.1/src/buf/buf_impl.rs:23:9
[INFO] [stdout]     |
[INFO] [stdout] 23  | /         if let Some(ret) = ret {
[INFO] [stdout] 24  | |             // if the direct conversion was possible, advance and return
[INFO] [stdout] 25  | |             $this.advance(SIZE);
[INFO] [stdout] 26  | |             return ret;
[INFO] [stdout] ...   |
[INFO] [stdout] 31  | |             return $typ::$conv(buf);
[INFO] [stdout] 32  | |         }
[INFO] [stdout]     | |_________^ cannot satisfy `_ -> _`
[INFO] [stdout] ...
[INFO] [stdout] 531 |           buf_get_impl!(self, i64::from_be_bytes);
[INFO] [stdout]     |           --------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `buf_get_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0284]: type annotations needed: cannot satisfy `_ -> _`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/bytes-1.0.1/src/buf/buf_impl.rs:23:9
[INFO] [stdout]     |
[INFO] [stdout] 23  | /         if let Some(ret) = ret {
[INFO] [stdout] 24  | |             // if the direct conversion was possible, advance and return
[INFO] [stdout] 25  | |             $this.advance(SIZE);
[INFO] [stdout] 26  | |             return ret;
[INFO] [stdout] ...   |
[INFO] [stdout] 31  | |             return $typ::$conv(buf);
[INFO] [stdout] 32  | |         }
[INFO] [stdout]     | |_________^ cannot satisfy `_ -> _`
[INFO] [stdout] ...
[INFO] [stdout] 551 |           buf_get_impl!(self, i64::from_le_bytes);
[INFO] [stdout]     |           --------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `buf_get_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0284]: type annotations needed: cannot satisfy `_ -> _`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/bytes-1.0.1/src/buf/buf_impl.rs:23:9
[INFO] [stdout]     |
[INFO] [stdout] 23  | /         if let Some(ret) = ret {
[INFO] [stdout] 24  | |             // if the direct conversion was possible, advance and return
[INFO] [stdout] 25  | |             $this.advance(SIZE);
[INFO] [stdout] 26  | |             return ret;
[INFO] [stdout] ...   |
[INFO] [stdout] 31  | |             return $typ::$conv(buf);
[INFO] [stdout] 32  | |         }
[INFO] [stdout]     | |_________^ cannot satisfy `_ -> _`
[INFO] [stdout] ...
[INFO] [stdout] 571 |           buf_get_impl!(self, u128::from_be_bytes);
[INFO] [stdout]     |           ---------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `buf_get_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0284]: type annotations needed: cannot satisfy `_ -> _`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/bytes-1.0.1/src/buf/buf_impl.rs:23:9
[INFO] [stdout]     |
[INFO] [stdout] 23  | /         if let Some(ret) = ret {
[INFO] [stdout] 24  | |             // if the direct conversion was possible, advance and return
[INFO] [stdout] 25  | |             $this.advance(SIZE);
[INFO] [stdout] 26  | |             return ret;
[INFO] [stdout] ...   |
[INFO] [stdout] 31  | |             return $typ::$conv(buf);
[INFO] [stdout] 32  | |         }
[INFO] [stdout]     | |_________^ cannot satisfy `_ -> _`
[INFO] [stdout] ...
[INFO] [stdout] 591 |           buf_get_impl!(self, u128::from_le_bytes);
[INFO] [stdout]     |           ---------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `buf_get_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0284]: type annotations needed: cannot satisfy `_ -> _`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/bytes-1.0.1/src/buf/buf_impl.rs:23:9
[INFO] [stdout]     |
[INFO] [stdout] 23  | /         if let Some(ret) = ret {
[INFO] [stdout] 24  | |             // if the direct conversion was possible, advance and return
[INFO] [stdout] 25  | |             $this.advance(SIZE);
[INFO] [stdout] 26  | |             return ret;
[INFO] [stdout] ...   |
[INFO] [stdout] 31  | |             return $typ::$conv(buf);
[INFO] [stdout] 32  | |         }
[INFO] [stdout]     | |_________^ cannot satisfy `_ -> _`
[INFO] [stdout] ...
[INFO] [stdout] 611 |           buf_get_impl!(self, i128::from_be_bytes);
[INFO] [stdout]     |           ---------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `buf_get_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0284]: type annotations needed: cannot satisfy `_ -> _`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/bytes-1.0.1/src/buf/buf_impl.rs:23:9
[INFO] [stdout]     |
[INFO] [stdout] 23  | /         if let Some(ret) = ret {
[INFO] [stdout] 24  | |             // if the direct conversion was possible, advance and return
[INFO] [stdout] 25  | |             $this.advance(SIZE);
[INFO] [stdout] 26  | |             return ret;
[INFO] [stdout] ...   |
[INFO] [stdout] 31  | |             return $typ::$conv(buf);
[INFO] [stdout] 32  | |         }
[INFO] [stdout]     | |_________^ cannot satisfy `_ -> _`
[INFO] [stdout] ...
[INFO] [stdout] 631 |           buf_get_impl!(self, i128::from_le_bytes);
[INFO] [stdout]     |           ---------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `buf_get_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking proc-macro-nested v0.1.7
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]     Checking slab v0.4.3
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]     Checking futures-sink v0.3.16
[INFO] [stderr]    Compiling futures-channel v0.3.16
[INFO] [stdout] error: aborting due to 16 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0284`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `bytes` (lib) due to 17 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "ab5a3c19b61c46758f2ad0a017cb97587eaa356ceee38789cd2b904ba68c8c39", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab5a3c19b61c46758f2ad0a017cb97587eaa356ceee38789cd2b904ba68c8c39", kill_on_drop: false }`
[INFO] [stdout] ab5a3c19b61c46758f2ad0a017cb97587eaa356ceee38789cd2b904ba68c8c39