[INFO] cloning repository https://github.com/grigala/rusty_flutter
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/grigala/rusty_flutter" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgrigala%2Frusty_flutter", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgrigala%2Frusty_flutter'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1190e0d898802a8e7aa637d28a85f4ac3e7c83d4
[INFO] checking grigala/rusty_flutter against master#8c32e313cccf7df531e2d49ffb8227bb92304aee for pr-145608-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgrigala%2Frusty_flutter" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/grigala/rusty_flutter
[INFO] finished tweaking git repo https://github.com/grigala/rusty_flutter
[INFO] tweaked toml for git repo https://github.com/grigala/rusty_flutter written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/grigala/rusty_flutter on toolchain 8c32e313cccf7df531e2d49ffb8227bb92304aee
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/grigala/rusty_flutter 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" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded unicode-ident v1.0.6
[INFO] [stderr]   Downloaded shlex v1.1.0
[INFO] [stderr]   Downloaded thiserror-impl v1.0.38
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[INFO] [stderr]   Downloaded itoa v1.0.5
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[INFO] [stderr]   Downloaded autocfg v1.1.0
[INFO] [stderr]   Downloaded proc-macro-crate v1.3.0
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[INFO] [stderr]   Downloaded serde_derive v1.0.152
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[INFO] [stderr]   Downloaded ryu v1.0.12
[INFO] [stderr]   Downloaded alsa v0.6.0
[INFO] [stderr]   Downloaded bumpalo v3.12.0
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[INFO] [stderr]   Downloaded claxon v0.4.3
[INFO] [stderr]   Downloaded hashbrown v0.12.3
[INFO] [stderr]   Downloaded cc v1.0.78
[INFO] [stderr]   Downloaded cpal v0.14.2
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[INFO] [stderr]   Downloaded serde v1.0.152
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[INFO] [stderr]   Downloaded serde_json v1.0.91
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[INFO] [stderr]   Downloaded wasm-bindgen-backend v0.2.83
[INFO] [stderr]   Downloaded ndk v0.6.0
[INFO] [stderr]   Downloaded lock_api v0.4.9
[INFO] [stderr]   Downloaded parking_lot v0.12.1
[INFO] [stderr]   Downloaded ogg v0.8.0
[INFO] [stderr]   Downloaded mach v0.3.2
[INFO] [stderr]   Downloaded minimp3 v0.5.1
[INFO] [stderr]   Downloaded windows_x86_64_gnu v0.42.1
[INFO] [stderr]   Downloaded windows_aarch64_msvc v0.37.0
[INFO] [stderr]   Downloaded windows_aarch64_msvc v0.42.1
[INFO] [stderr]   Downloaded windows_i686_msvc v0.37.0
[INFO] [stderr]   Downloaded windows_i686_gnu v0.42.1
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[INFO] [stderr]   Downloaded windows_i686_gnu v0.37.0
[INFO] [stderr]   Downloaded windows_x86_64_msvc v0.37.0
[INFO] [stderr]   Downloaded libc v0.2.139
[INFO] [stderr]   Downloaded windows_x86_64_msvc v0.42.1
[INFO] [stderr]   Downloaded windows_x86_64_gnu v0.37.0
[INFO] [stderr]   Downloaded windows-sys v0.42.0
[INFO] [stderr]   Downloaded windows v0.37.0
[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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8950ea698010c5e7de5b0760f2ba0fd5b3fdc6a271a505efa9566c16b7c64e15
[INFO] running `Command { std: "docker" "start" "-a" "8950ea698010c5e7de5b0760f2ba0fd5b3fdc6a271a505efa9566c16b7c64e15", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8950ea698010c5e7de5b0760f2ba0fd5b3fdc6a271a505efa9566c16b7c64e15", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8950ea698010c5e7de5b0760f2ba0fd5b3fdc6a271a505efa9566c16b7c64e15", kill_on_drop: false }`
[INFO] [stdout] 8950ea698010c5e7de5b0760f2ba0fd5b3fdc6a271a505efa9566c16b7c64e15
[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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 616a9d4a6de9f2c6ff3764aa5c90bf7b24077010724be5f6fadc2d811df9b807
[INFO] running `Command { std: "docker" "start" "-a" "616a9d4a6de9f2c6ff3764aa5c90bf7b24077010724be5f6fadc2d811df9b807", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.50
[INFO] [stderr]    Compiling quote v1.0.23
[INFO] [stderr]    Compiling unicode-ident v1.0.6
[INFO] [stderr]    Compiling syn v1.0.107
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling pkg-config v0.3.26
[INFO] [stderr]    Compiling thiserror v1.0.38
[INFO] [stderr]    Compiling parking_lot_core v0.9.6
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking smallvec v1.10.0
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling cpal v0.14.2
[INFO] [stderr]     Checking tinyvec_macros v0.1.0
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking tinyvec v1.6.0
[INFO] [stderr]     Checking hound v3.5.0
[INFO] [stderr]     Checking claxon v0.4.3
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.50/src/lib.rs:92:30
[INFO] [stdout]    |
[INFO] [stdout] 92 |     feature(proc_macro_span, proc_macro_span_shrink)
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ogg v0.8.0
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling lock_api v0.4.9
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `proc-macro2` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "616a9d4a6de9f2c6ff3764aa5c90bf7b24077010724be5f6fadc2d811df9b807", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "616a9d4a6de9f2c6ff3764aa5c90bf7b24077010724be5f6fadc2d811df9b807", kill_on_drop: false }`
[INFO] [stdout] 616a9d4a6de9f2c6ff3764aa5c90bf7b24077010724be5f6fadc2d811df9b807