[INFO] cloning repository https://github.com/amachang/learning_rust_async_stream
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/amachang/learning_rust_async_stream" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Famachang%2Flearning_rust_async_stream", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Famachang%2Flearning_rust_async_stream'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3b1ab2e12523a7d33ac7a8077a9f76df068daac9
[INFO] checking amachang/learning_rust_async_stream against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Famachang%2Flearning_rust_async_stream" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/amachang/learning_rust_async_stream on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/amachang/learning_rust_async_stream
[INFO] finished tweaking git repo https://github.com/amachang/learning_rust_async_stream
[INFO] tweaked toml for git repo https://github.com/amachang/learning_rust_async_stream written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/amachang/learning_rust_async_stream 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded sysinfo v0.29.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4ba4910070327a6251a43f0a9bfe91c7d5f1014a1c888d693a615ca36657db13
[INFO] running `Command { std: "docker" "start" "-a" "4ba4910070327a6251a43f0a9bfe91c7d5f1014a1c888d693a615ca36657db13", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4ba4910070327a6251a43f0a9bfe91c7d5f1014a1c888d693a615ca36657db13", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4ba4910070327a6251a43f0a9bfe91c7d5f1014a1c888d693a615ca36657db13", kill_on_drop: false }`
[INFO] [stdout] 4ba4910070327a6251a43f0a9bfe91c7d5f1014a1c888d693a615ca36657db13
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b8fbd19d381679dea77956e9aca63dafa4f389384c41b4aacd3687d4f567879d
[INFO] running `Command { std: "docker" "start" "-a" "b8fbd19d381679dea77956e9aca63dafa4f389384c41b4aacd3687d4f567879d", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling proc-macro2 v1.0.66
[INFO] [stderr]    Compiling unicode-ident v1.0.11
[INFO] [stderr]    Compiling crossbeam-utils v0.8.16
[INFO] [stderr]    Compiling futures-core v0.3.28
[INFO] [stderr]    Compiling memoffset v0.9.0
[INFO] [stderr]    Compiling lock_api v0.4.10
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.15
[INFO] [stderr]     Checking pin-project-lite v0.2.10
[INFO] [stderr]    Compiling parking_lot_core v0.9.8
[INFO] [stderr]    Compiling slab v0.4.8
[INFO] [stderr]    Compiling serde v1.0.177
[INFO] [stderr]     Checking smallvec v1.11.0
[INFO] [stderr]    Compiling futures-task v0.3.28
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]     Checking futures-sink v0.3.28
[INFO] [stderr]    Compiling futures-channel v0.3.28
[INFO] [stderr]    Compiling tokio v1.29.1
[INFO] [stderr]    Compiling rayon-core v1.11.0
[INFO] [stderr]     Checking futures-io v0.3.28
[INFO] [stderr]    Compiling serde_derive v1.0.177
[INFO] [stderr]    Compiling futures-util v0.3.28
[INFO] [stderr]    Compiling num-traits v0.2.16
[INFO] [stderr]     Checking bytes v1.4.0
[INFO] [stderr]    Compiling serde_json v1.0.104
[INFO] [stderr]     Checking either v1.9.0
[INFO] [stderr]     Checking itoa v1.0.9
[INFO] [stderr]     Checking once_cell v1.18.0
[INFO] [stderr]     Checking ryu v1.0.15
[INFO] [stderr]     Checking iana-time-zone v0.1.57
[INFO] [stderr]     Checking crossbeam-channel v0.5.8
[INFO] [stderr]    Compiling quote v1.0.32
[INFO] [stderr]    Compiling syn v2.0.27
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking mio v0.8.8
[INFO] [stderr]     Checking signal-hook-registry v1.4.1
[INFO] [stderr]     Checking socket2 v0.4.9
[INFO] [stderr]     Checking time v0.1.45
[INFO] [stderr]     Checking crossbeam-deque v0.8.3
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]     Checking rayon v1.7.0
[INFO] [stderr]     Checking chrono v0.4.26
[INFO] [stderr]     Checking sysinfo v0.29.7
[INFO] [stderr]    Compiling tokio-macros v2.1.0
[INFO] [stderr]    Compiling futures-macro v0.3.28
[INFO] [stderr]    Compiling pin-project-internal v1.1.2
[INFO] [stderr]     Checking pin-project v1.1.2
[INFO] [stderr]     Checking futures-executor v0.3.28
[INFO] [stderr]     Checking futures v0.3.28
[INFO] [stderr]     Checking tokio-util v0.7.8
[INFO] [stderr]     Checking tokio-stream v0.1.14
[INFO] [stderr]     Checking learning_rust_async_stream v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 23.67s
[INFO] running `Command { std: "docker" "inspect" "b8fbd19d381679dea77956e9aca63dafa4f389384c41b4aacd3687d4f567879d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b8fbd19d381679dea77956e9aca63dafa4f389384c41b4aacd3687d4f567879d", kill_on_drop: false }`
[INFO] [stdout] b8fbd19d381679dea77956e9aca63dafa4f389384c41b4aacd3687d4f567879d
[INFO] checking amachang/learning_rust_async_stream against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Famachang%2Flearning_rust_async_stream" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/amachang/learning_rust_async_stream on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/amachang/learning_rust_async_stream
[INFO] finished tweaking git repo https://github.com/amachang/learning_rust_async_stream
[INFO] tweaked toml for git repo https://github.com/amachang/learning_rust_async_stream written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/amachang/learning_rust_async_stream 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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3dba77b7056940bbf99605df7d7bf965d3e22409f82ef8627c3ea265c4afbd6c
[INFO] running `Command { std: "docker" "start" "-a" "3dba77b7056940bbf99605df7d7bf965d3e22409f82ef8627c3ea265c4afbd6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3dba77b7056940bbf99605df7d7bf965d3e22409f82ef8627c3ea265c4afbd6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3dba77b7056940bbf99605df7d7bf965d3e22409f82ef8627c3ea265c4afbd6c", kill_on_drop: false }`
[INFO] [stdout] 3dba77b7056940bbf99605df7d7bf965d3e22409f82ef8627c3ea265c4afbd6c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6eae9df9a312d8d0e7bb4a62ba2c37cf5fe12e829f1e02949d3c62b756260648
[INFO] running `Command { std: "docker" "start" "-a" "6eae9df9a312d8d0e7bb4a62ba2c37cf5fe12e829f1e02949d3c62b756260648", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling proc-macro2 v1.0.66
[INFO] [stderr]    Compiling unicode-ident v1.0.11
[INFO] [stderr]    Compiling futures-core v0.3.28
[INFO] [stderr]    Compiling crossbeam-utils v0.8.16
[INFO] [stderr]    Compiling memoffset v0.9.0
[INFO] [stderr]    Compiling lock_api v0.4.10
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.15
[INFO] [stderr]     Checking pin-project-lite v0.2.10
[INFO] [stderr]    Compiling parking_lot_core v0.9.8
[INFO] [stderr]    Compiling slab v0.4.8
[INFO] [stderr]    Compiling serde v1.0.177
[INFO] [stderr]    Compiling futures-channel v0.3.28
[INFO] [stderr]     Checking futures-sink v0.3.28
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]     Checking smallvec v1.11.0
[INFO] [stderr]    Compiling futures-task v0.3.28
[INFO] [stderr]    Compiling tokio v1.29.1
[INFO] [stderr]    Compiling serde_derive v1.0.177
[INFO] [stderr]    Compiling futures-util v0.3.28
[INFO] [stderr]     Checking futures-io v0.3.28
[INFO] [stderr]    Compiling rayon-core v1.11.0
[INFO] [stderr]    Compiling num-traits v0.2.16
[INFO] [stderr]     Checking bytes v1.4.0
[INFO] [stderr]     Checking either v1.9.0
[INFO] [stderr]    Compiling serde_json v1.0.104
[INFO] [stderr]     Checking once_cell v1.18.0
[INFO] [stderr]     Checking ryu v1.0.15
[INFO] [stderr]     Checking iana-time-zone v0.1.57
[INFO] [stderr]     Checking itoa v1.0.9
[INFO] [stderr]     Checking crossbeam-channel v0.5.8
[INFO] [stderr]    Compiling quote v1.0.32
[INFO] [stderr]    Compiling syn v2.0.27
[INFO] [stderr]     Checking crossbeam-deque v0.8.3
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking socket2 v0.4.9
[INFO] [stderr]     Checking signal-hook-registry v1.4.1
[INFO] [stderr]     Checking mio v0.8.8
[INFO] [stderr]     Checking time v0.1.45
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]     Checking rayon v1.7.0
[INFO] [stderr]    Compiling futures-macro v0.3.28
[INFO] [stderr]    Compiling tokio-macros v2.1.0
[INFO] [stderr]    Compiling pin-project-internal v1.1.2
[INFO] [stderr]     Checking chrono v0.4.26
[INFO] [stderr]     Checking sysinfo v0.29.7
[INFO] [stderr]     Checking pin-project v1.1.2
[INFO] [stderr]     Checking futures-executor v0.3.28
[INFO] [stderr]     Checking futures v0.3.28
[INFO] [stderr]     Checking tokio-stream v0.1.14
[INFO] [stderr]     Checking tokio-util v0.7.8
[INFO] [stderr]     Checking learning_rust_async_stream v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 21.72s
[INFO] running `Command { std: "docker" "inspect" "6eae9df9a312d8d0e7bb4a62ba2c37cf5fe12e829f1e02949d3c62b756260648", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6eae9df9a312d8d0e7bb4a62ba2c37cf5fe12e829f1e02949d3c62b756260648", kill_on_drop: false }`
[INFO] [stdout] 6eae9df9a312d8d0e7bb4a62ba2c37cf5fe12e829f1e02949d3c62b756260648