[INFO] cloning repository https://github.com/vivlim/backflip
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/vivlim/backflip" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvivlim%2Fbackflip", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvivlim%2Fbackflip'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 38cc2f36b41844539ab4ccfd03aadd50db9ca83d
[INFO] testing vivlim/backflip against master#160e7623e8cbbf1feab2b6e2a24733a98c7bde9c for pr-145628
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvivlim%2Fbackflip" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/vivlim/backflip
[INFO] finished tweaking git repo https://github.com/vivlim/backflip
[INFO] tweaked toml for git repo https://github.com/vivlim/backflip written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/vivlim/backflip on toolchain 160e7623e8cbbf1feab2b6e2a24733a98c7bde9c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+160e7623e8cbbf1feab2b6e2a24733a98c7bde9c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/vivlim/backflip 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" "+160e7623e8cbbf1feab2b6e2a24733a98c7bde9c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded global-hotkey v0.4.2
[INFO] [stderr]   Downloaded tray-icon v0.11.3
[INFO] [stderr]   Downloaded winit v0.29.13
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+160e7623e8cbbf1feab2b6e2a24733a98c7bde9c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 746d5454924bb01072cc5d6fc2a3ab0d0d01bd980bf3e643b3e9c8b67a79f9ab
[INFO] running `Command { std: "docker" "start" "-a" "746d5454924bb01072cc5d6fc2a3ab0d0d01bd980bf3e643b3e9c8b67a79f9ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "746d5454924bb01072cc5d6fc2a3ab0d0d01bd980bf3e643b3e9c8b67a79f9ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "746d5454924bb01072cc5d6fc2a3ab0d0d01bd980bf3e643b3e9c8b67a79f9ab", kill_on_drop: false }`
[INFO] [stdout] 746d5454924bb01072cc5d6fc2a3ab0d0d01bd980bf3e643b3e9c8b67a79f9ab
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+160e7623e8cbbf1feab2b6e2a24733a98c7bde9c" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e36c8a031dfed405fa53d953430f57b02cd6e3b5f11ca6ec7ac76b24b0649848
[INFO] running `Command { std: "docker" "start" "-a" "e36c8a031dfed405fa53d953430f57b02cd6e3b5f11ca6ec7ac76b24b0649848", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]    Compiling proc-macro2 v1.0.78
[INFO] [stderr]    Compiling serde v1.0.197
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling smallvec v1.13.1
[INFO] [stderr]    Compiling hashbrown v0.14.3
[INFO] [stderr]    Compiling pin-project-lite v0.2.13
[INFO] [stderr]    Compiling target-lexicon v0.12.14
[INFO] [stderr]    Compiling memchr v2.7.1
[INFO] [stderr]    Compiling crossbeam-utils v0.8.19
[INFO] [stderr]    Compiling slab v0.4.9
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling thiserror v1.0.57
[INFO] [stderr]    Compiling libloading v0.8.2
[INFO] [stderr]    Compiling rustix v0.38.31
[INFO] [stderr]    Compiling linux-raw-sys v0.4.13
[INFO] [stderr]    Compiling tracing-core v0.1.32
[INFO] [stderr]    Compiling wayland-sys v0.31.1
[INFO] [stderr]    Compiling lock_api v0.4.11
[INFO] [stderr]    Compiling dlib v0.5.2
[INFO] [stderr]    Compiling fastrand v2.0.1
[INFO] [stderr]    Compiling cfg_aliases v0.1.1
[INFO] [stderr]    Compiling futures-channel v0.3.30
[INFO] [stderr]    Compiling polling v2.8.0
[INFO] [stderr]    Compiling memoffset v0.7.1
[INFO] [stderr]    Compiling futures-lite v2.2.0
[INFO] [stderr]    Compiling ttf-parser v0.20.0
[INFO] [stderr]    Compiling async-task v4.7.0
[INFO] [stderr]    Compiling regex-syntax v0.8.2
[INFO] [stderr]    Compiling waker-fn v1.1.1
[INFO] [stderr]    Compiling quick-xml v0.31.0
[INFO] [stderr]    Compiling aho-corasick v1.1.2
[INFO] [stderr]    Compiling indexmap v2.2.5
[INFO] [stderr]    Compiling rustix v0.37.27
[INFO] [stderr]    Compiling cfg-expr v0.15.7
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling piper v0.2.1
[INFO] [stderr]    Compiling futures-lite v1.13.0
[INFO] [stderr]    Compiling syn v2.0.52
[INFO] [stderr]    Compiling concurrent-queue v2.4.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.18
[INFO] [stderr]    Compiling event-listener v4.0.3
[INFO] [stderr]    Compiling event-listener v5.2.0
[INFO] [stderr]    Compiling async-lock v2.8.0
[INFO] [stderr]    Compiling async-fs v1.6.0
[INFO] [stderr]    Compiling async-io v1.13.0
[INFO] [stderr]    Compiling event-listener-strategy v0.4.0
[INFO] [stderr]    Compiling event-listener-strategy v0.5.0
[INFO] [stderr]    Compiling ahash v0.8.10
[INFO] [stderr]    Compiling async-channel v2.2.0
[INFO] [stderr]    Compiling crc32fast v1.4.0
[INFO] [stderr]    Compiling semver v1.0.22
[INFO] [stderr]    Compiling wayland-scanner v0.31.1
[INFO] [stderr]    Compiling async-trait v0.1.77
[INFO] [stderr]    Compiling async-lock v3.3.0
[INFO] [stderr]    Compiling cc v1.0.88
[INFO] [stderr]    Compiling getrandom v0.2.12
[INFO] [stderr]    Compiling io-lifetimes v1.0.11
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling socket2 v0.4.10
[INFO] [stderr]    Compiling miniz_oxide v0.7.2
[INFO] [stderr]    Compiling crossbeam-deque v0.8.5
[INFO] [stderr]    Compiling smithay-client-toolkit v0.18.1
[INFO] [stderr]    Compiling gio v0.18.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling xml-rs v0.8.19
[INFO] [stderr]    Compiling xkeysym v0.2.0
[INFO] [stderr]    Compiling zerocopy v0.7.32
[INFO] [stderr]    Compiling async-executor v1.8.0
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling rayon-core v1.12.1
[INFO] [stderr]    Compiling nix v0.26.4
[INFO] [stderr]    Compiling gl_generator v0.14.0
[INFO] [stderr]    Compiling x11-dl v2.21.0
[INFO] [stderr]    Compiling memmap2 v0.9.4
[INFO] [stderr]    Compiling regex-automata v0.4.5
[INFO] [stderr]    Compiling xdg-home v1.1.0
[INFO] [stderr]    Compiling async-broadcast v0.5.1
[INFO] [stderr]    Compiling ordered-stream v0.2.0
[INFO] [stderr]    Compiling parking_lot_core v0.9.9
[INFO] [stderr]    Compiling owned_ttf_parser v0.20.0
[INFO] [stderr]    Compiling flate2 v1.0.28
[INFO] [stderr]    Compiling wayland-backend v0.3.3
[INFO] [stderr]    Compiling x11rb-protocol v0.13.0
[INFO] [stderr]    Compiling ab_glyph v0.2.23
[INFO] [stderr]    Compiling either v1.10.0
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]    Compiling spin v0.9.8
[INFO] [stderr]    Compiling rayon v1.9.0
[INFO] [stderr]    Compiling winit v0.29.13
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]    Compiling field-offset v0.3.6
[INFO] [stderr]    Compiling x11 v2.21.0
[INFO] [stderr]    Compiling accesskit v0.12.2
[INFO] [stderr]    Compiling raw-window-handle v0.5.2
[INFO] [stderr]    Compiling weezl v0.1.8
[INFO] [stderr]    Compiling png v0.17.13
[INFO] [stderr]    Compiling flume v0.11.0
[INFO] [stderr]    Compiling parking_lot v0.12.1
[INFO] [stderr]    Compiling zune-inflate v0.2.54
[INFO] [stderr]    Compiling gtk v0.18.1
[INFO] [stderr]    Compiling half v2.4.0
[INFO] [stderr]    Compiling smol_str v0.2.1
[INFO] [stderr]    Compiling lebe v0.5.2
[INFO] [stderr]    Compiling libxdo-sys v0.11.0
[INFO] [stderr]    Compiling raw-window-handle v0.6.0
[INFO] [stderr]    Compiling bit_field v0.10.2
[INFO] [stderr]    Compiling gif v0.13.1
[INFO] [stderr]    Compiling glutin_egl_sys v0.6.0
[INFO] [stderr]    Compiling glutin_glx_sys v0.5.0
[INFO] [stderr]    Compiling windows_x86_64_gnu v0.52.4
[INFO] [stderr]    Compiling exr v1.72.0
[INFO] [stderr]    Compiling accesskit_consumer v0.16.1
[INFO] [stderr]    Compiling crossbeam-channel v0.5.12
[INFO] [stderr]    Compiling glutin v0.31.3
[INFO] [stderr]    Compiling libloading v0.7.4
[INFO] [stderr]    Compiling async-once-cell v0.5.3
[INFO] [stderr] error: could not compile `syn` (lib)
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/160e7623e8cbbf1feab2b6e2a24733a98c7bde9c/bin/rustc --crate-name syn --edition=2021 /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/syn-2.0.52/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no --cfg 'feature="clone-impls"' --cfg 'feature="default"' --cfg 'feature="derive"' --cfg 'feature="extra-traits"' --cfg 'feature="full"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --cfg 'feature="quote"' --cfg 'feature="visit"' --cfg 'feature="visit-mut"' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("clone-impls", "default", "derive", "extra-traits", "fold", "full", "parsing", "printing", "proc-macro", "quote", "test", "visit", "visit-mut"))' -C metadata=8c48e3ae960e1d9a -C extra-filename=-d8eee07a53eee1a4 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-43bef833ad5a6872.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-7acff96f9e6772ca.rmeta --extern unicode_ident=/opt/rustwide/target/debug/deps/libunicode_ident-f2de522ba645d884.rmeta --cap-lints allow --cap-lints=forbid` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "e36c8a031dfed405fa53d953430f57b02cd6e3b5f11ca6ec7ac76b24b0649848", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e36c8a031dfed405fa53d953430f57b02cd6e3b5f11ca6ec7ac76b24b0649848", kill_on_drop: false }`
[INFO] [stdout] e36c8a031dfed405fa53d953430f57b02cd6e3b5f11ca6ec7ac76b24b0649848