[INFO] fetching crate prevmark 0.1.0...
[INFO] testing prevmark-0.1.0 against master#61223975d46f794466efa832bc7562b9707ecc46+rustflags=-Copt-level=3 for pr-121282
[INFO] extracting crate prevmark 0.1.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate prevmark 0.1.0 on toolchain 61223975d46f794466efa832bc7562b9707ecc46
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+61223975d46f794466efa832bc7562b9707ecc46" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate prevmark 0.1.0
[INFO] finished tweaking crates.io crate prevmark 0.1.0
[INFO] tweaked toml for crates.io crate prevmark 0.1.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate prevmark 0.1.0 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" "+61223975d46f794466efa832bc7562b9707ecc46" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded fontdb v0.7.0
[INFO] [stderr]   Downloaded derive_more v0.99.16
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[INFO] [stderr]   Downloaded glutin_egl_sys v0.1.5
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[INFO] [stderr]   Downloaded mio-misc v1.2.1
[INFO] [stderr]   Downloaded auto_enums_core v0.7.12
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[INFO] [stderr]   Downloaded weezl v0.1.5
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[INFO] [stderr]   Downloaded resvg v0.19.0
[INFO] [stderr]   Downloaded lyon_svg v0.17.2
[INFO] [stderr]   Downloaded sixtyfps-compilerlib v0.1.5
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[INFO] [stderr]   Downloaded rgb v0.8.29
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[INFO] [stderr]   Downloaded sixtyfps-build v0.1.5
[INFO] [stderr]   Downloaded crc32fast v1.2.2
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[INFO] [stderr]   Downloaded sixtyfps-macros v0.1.5
[INFO] [stderr]   Downloaded ouroboros_macro v0.12.0
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[INFO] [stderr]   Downloaded imgref v1.9.1
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[INFO] [stderr]   Downloaded triomphe v0.1.3
[INFO] [stderr]   Downloaded weak-table v0.3.0
[INFO] [stderr]   Downloaded sixtyfps-corelib v0.1.5
[INFO] [stderr]   Downloaded sixtyfps-corelib-macros v0.1.5
[INFO] [stderr]   Downloaded sixtyfps-rendering-backend-qt v0.1.5
[INFO] [stderr]   Downloaded sixtyfps-rendering-backend-default v0.1.5
[INFO] [stderr]   Downloaded const-field-offset-macro v0.1.2
[INFO] [stderr]   Downloaded vtable-macro v0.1.4
[INFO] [stderr]   Downloaded sixtyfps v0.1.5
[INFO] [stderr]   Downloaded by_address v1.0.4
[INFO] [stderr]   Downloaded femtovg v0.2.8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+61223975d46f794466efa832bc7562b9707ecc46" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a695fcaf5301563967133f57596fc4780580e0bea8ea77c08c20c28205038f44
[INFO] running `Command { std: "docker" "start" "-a" "a695fcaf5301563967133f57596fc4780580e0bea8ea77c08c20c28205038f44", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a695fcaf5301563967133f57596fc4780580e0bea8ea77c08c20c28205038f44", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a695fcaf5301563967133f57596fc4780580e0bea8ea77c08c20c28205038f44", kill_on_drop: false }`
[INFO] [stdout] a695fcaf5301563967133f57596fc4780580e0bea8ea77c08c20c28205038f44
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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 -Copt-level=3" "-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" "+61223975d46f794466efa832bc7562b9707ecc46" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e1b409235bef4dce9b97347cdf0c1774faf1a0e7d7007601ca1ce3c2e5ed43a4
[INFO] running `Command { std: "docker" "start" "-a" "e1b409235bef4dce9b97347cdf0c1774faf1a0e7d7007601ca1ce3c2e5ed43a4", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling libc v0.2.108
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.81
[INFO] [stderr]    Compiling siphasher v0.3.7
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling smallvec v1.7.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.5
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling bytemuck v1.7.2
[INFO] [stderr]    Compiling cc v1.0.72
[INFO] [stderr]    Compiling crc32fast v1.2.2
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling pkg-config v0.3.22
[INFO] [stderr]    Compiling matches v0.1.9
[INFO] [stderr]    Compiling adler32 v1.2.0
[INFO] [stderr]    Compiling encoding_index_tests v0.1.4
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling adler v1.0.2
[INFO] [stderr]    Compiling arrayvec v0.5.2
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[INFO] [stderr]    Compiling ttf-parser v0.12.3
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[INFO] [stderr]    Compiling phf_shared v0.8.0
[INFO] [stderr]    Compiling unicode-bidi v0.3.7
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[INFO] [stderr]    Compiling unicode-bidi-mirroring v0.1.0
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling unicode-ccc v0.1.2
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling memmap2 v0.5.0
[INFO] [stderr]    Compiling num-rational v0.3.2
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling rand_pcg v0.2.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling aho-corasick v0.7.18
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[INFO] [stderr]    Compiling data-url v0.1.1
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[INFO] [stderr]    Compiling unicode-vo v0.1.0
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[INFO] [stderr]    Compiling cpp_common v0.5.6
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling safe_arch v0.5.2
[INFO] [stderr]    Compiling arrayref v0.3.6
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling xml-rs v0.8.4
[INFO] [stderr]    Compiling rustc_version v0.3.3
[INFO] [stderr]    Compiling tiny-skia v0.6.1
[INFO] [stderr]    Compiling gl_generator v0.14.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling lock_api v0.4.5
[INFO] [stderr]    Compiling tinyvec_macros v0.1.0
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]    Compiling semver v1.0.4
[INFO] [stderr]    Compiling once_cell v1.8.0
[INFO] [stderr]    Compiling parking_lot v0.11.2
[INFO] [stderr]    Compiling field-offset v0.3.4
[INFO] [stderr]    Compiling tinyvec v1.5.1
[INFO] [stderr]    Compiling toml v0.5.8
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling crossbeam-queue v0.3.2
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling weezl v0.1.5
[INFO] [stderr]    Compiling unicode-normalization v0.1.19
[INFO] [stderr]    Compiling jpeg-decoder v0.1.22
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling cpp_build v0.5.6
[INFO] [stderr]    Compiling expat-sys v2.1.6
[INFO] [stderr]    Compiling freetype-sys v0.13.1
[INFO] [stderr]    Compiling phf_codegen v0.8.0
[INFO] [stderr]    Compiling fontdb v0.7.0
[INFO] [stderr]    Compiling x11-dl v2.19.1
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling auto_enums_derive v0.7.12
[INFO] [stderr]    Compiling quick-xml v0.22.0
[INFO] [stderr]    Compiling float-cmp v0.5.3
[INFO] [stderr]    Compiling rustversion v1.0.5
[INFO] [stderr]    Compiling xmlwriter v0.1.0
[INFO] [stderr]    Compiling siphasher v0.2.3
[INFO] [stderr]    Compiling if_rust_version v1.0.0
[INFO] [stderr]    Compiling by_address v1.0.4
[INFO] [stderr]    Compiling termcolor v1.1.2
[INFO] [stderr]    Compiling svgtypes v0.5.0
[INFO] [stderr]    Compiling usvg v0.19.0
[INFO] [stderr]    Compiling tiff v0.6.1
[INFO] [stderr]    Compiling idna v0.2.3
[INFO] [stderr]    Compiling gif v0.11.3
[INFO] [stderr]    Compiling xcb v0.10.1
[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/61223975d46f794466efa832bc7562b9707ecc46/bin/rustc --crate-name syn --edition=2018 /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/syn-1.0.81/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="fold"' --cfg 'feature="full"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --cfg 'feature="quote"' --cfg 'feature="visit"' --cfg 'feature="visit-mut"' -C metadata=827a229db9f8f885 -C extra-filename=-827a229db9f8f885 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-8e4031dcc0bb996e.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-f847c05963be4ab7.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-aaa3863a121c329e.rmeta --cap-lints allow --cap-lints=forbid -Copt-level=3` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "e1b409235bef4dce9b97347cdf0c1774faf1a0e7d7007601ca1ce3c2e5ed43a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e1b409235bef4dce9b97347cdf0c1774faf1a0e7d7007601ca1ce3c2e5ed43a4", kill_on_drop: false }`
[INFO] [stdout] e1b409235bef4dce9b97347cdf0c1774faf1a0e7d7007601ca1ce3c2e5ed43a4