[INFO] cloning repository https://github.com/ascii-dresden/ascii-prepaid-system
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ascii-dresden/ascii-prepaid-system" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fascii-dresden%2Fascii-prepaid-system", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fascii-dresden%2Fascii-prepaid-system'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1aaa836ae7601151b882ba3d256d69e3f900deb3
[INFO] checking ascii-dresden/ascii-prepaid-system against master#5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fascii-dresden%2Fascii-prepaid-system" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ascii-dresden/ascii-prepaid-system on toolchain 5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-2/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/ascii-dresden/ascii-prepaid-system
[INFO] finished tweaking git repo https://github.com/ascii-dresden/ascii-prepaid-system
[INFO] tweaked toml for git repo https://github.com/ascii-dresden/ascii-prepaid-system written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/ascii-dresden/ascii-prepaid-system already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bb6a3714da679feb27fb7ecc2b315bb3a8bb02fac15bc980ec946e9cde323952
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "bb6a3714da679feb27fb7ecc2b315bb3a8bb02fac15bc980ec946e9cde323952", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bb6a3714da679feb27fb7ecc2b315bb3a8bb02fac15bc980ec946e9cde323952", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bb6a3714da679feb27fb7ecc2b315bb3a8bb02fac15bc980ec946e9cde323952", kill_on_drop: false }`
[INFO] [stdout] bb6a3714da679feb27fb7ecc2b315bb3a8bb02fac15bc980ec946e9cde323952
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5645764d755b92137a2d80fff23c608e66bcf52cab6413004a118403ca2274af
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "5645764d755b92137a2d80fff23c608e66bcf52cab6413004a118403ca2274af", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.94
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]     Checking slab v0.4.3
[INFO] [stderr]     Checking smallvec v1.6.1
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling futures-task v0.3.15
[INFO] [stderr]     Checking bytes v0.5.6
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]    Compiling pin-project-internal v0.4.28
[INFO] [stderr]     Checking matches v0.1.8
[INFO] [stderr]     Checking tinyvec_macros v0.1.0
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]     Checking percent-encoding v2.1.0
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
[INFO] [stderr]     Checking cpuid-bool v0.2.0
[INFO] [stderr]    Compiling const_fn v0.4.7
[INFO] [stderr]     Checking match_cfg v0.1.0
[INFO] [stderr]    Compiling gimli v0.24.0
[INFO] [stderr]     Checking hashbrown v0.9.1
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling rustc-demangle v0.1.19
[INFO] [stderr]    Compiling object v0.24.0
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]     Checking base64 v0.13.0
[INFO] [stderr]     Checking language-tags v0.2.2
[INFO] [stderr]    Compiling bindgen v0.48.1
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling scopeguard v0.3.3
[INFO] [stderr]    Compiling remove_dir_all v0.5.3
[INFO] [stderr]    Compiling v_escape v0.15.0
[INFO] [stderr]    Compiling pq-sys v0.4.6
[INFO] [stderr]    Compiling v_htmlescape v0.12.0
[INFO] [stderr]     Checking safemem v0.3.3
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking bufstream v0.1.4
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking quick-error v2.0.1
[INFO] [stderr]     Checking sublime_fuzzy v0.6.0
[INFO] [stderr]    Compiling hex-literal v0.3.1
[INFO] [stderr]     Checking dotenv v0.15.0
[INFO] [stderr]    Compiling generic-array v0.14.4
[INFO] [stderr]     Checking instant v0.1.9
[INFO] [stderr]    Compiling standback v0.2.17
[INFO] [stderr]    Compiling time v0.2.26
[INFO] [stderr]     Checking tracing-core v0.1.18
[INFO] [stderr]    Compiling cookie v0.14.4
[INFO] [stderr]     Checking fxhash v0.2.1
[INFO] [stderr]     Checking tinyvec v1.2.0
[INFO] [stderr]     Checking bytestring v1.0.0
[INFO] [stderr]     Checking lock_api v0.4.4
[INFO] [stderr]     Checking unicode-bidi v0.3.5
[INFO] [stderr]    Compiling clang-sys v0.26.4
[INFO] [stderr]     Checking lru-cache v0.1.2
[INFO] [stderr]     Checking form_urlencoded v1.0.1
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand_jitter v0.1.4
[INFO] [stderr]    Compiling humantime v1.3.0
[INFO] [stderr]     Checking buf-min v0.4.0
[INFO] [stderr]    Compiling nom v4.2.3
[INFO] [stderr]    Compiling email v0.0.20
[INFO] [stderr]     Checking addr2line v0.15.1
[INFO] [stderr]    Compiling heck v0.3.2
[INFO] [stderr]     Checking base64 v0.9.3
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]    Compiling futures-macro v0.3.15
[INFO] [stderr]    Compiling futures-util v0.3.15
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling indexmap v1.6.2
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling tokio v1.6.0
[INFO] [stderr]    Compiling hashbrown v0.1.8
[INFO] [stderr]     Checking log v0.4.14
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking crc32fast v1.2.1
[INFO] [stderr]     Checking encoding_rs v0.8.28
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking twoway v0.2.1
[INFO] [stderr]     Checking rand_chacha v0.1.1
[INFO] [stderr]     Checking rand_pcg v0.1.2
[INFO] [stderr]     Checking tracing v0.1.26
[INFO] [stderr]     Checking unicode-normalization v0.1.17
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]     Checking digest v0.9.0
[INFO] [stderr]     Checking cipher v0.2.5
[INFO] [stderr]     Checking universal-hash v0.4.0
[INFO] [stderr]     Checking crypto-mac v0.10.0
[INFO] [stderr]     Checking block-buffer v0.9.0
[INFO] [stderr]     Checking aead v0.3.2
[INFO] [stderr]     Checking cipher v0.3.0
[INFO] [stderr]    Compiling jobserver v0.1.22
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]     Checking signal-hook-registry v1.3.0
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking net2 v0.2.37
[INFO] [stderr]     Checking parking_lot_core v0.8.3
[INFO] [stderr]     Checking getrandom v0.2.2
[INFO] [stderr]     Checking getrandom v0.1.16
[INFO] [stderr]     Checking hostname v0.3.1
[INFO] [stderr]     Checking socket2 v0.3.19
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking hostname v0.1.5
[INFO] [stderr]     Checking mio v0.7.11
[INFO] [stderr]     Checking rpassword v5.0.1
[INFO] [stderr]     Checking flate2 v1.0.20
[INFO] [stderr]     Checking polyval v0.4.5
[INFO] [stderr]     Checking aes-soft v0.6.4
[INFO] [stderr]     Checking ctr v0.6.0
[INFO] [stderr]     Checking hmac v0.10.1
[INFO] [stderr]     Checking sha2 v0.9.5
[INFO] [stderr]     Checking sha-1 v0.9.6
[INFO] [stderr]    Compiling env_logger v0.6.2
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]     Checking block-modes v0.8.1
[INFO] [stderr]     Checking aes v0.7.1
[INFO] [stderr]    Compiling cc v1.0.67
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking rand_core v0.6.2
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]     Checking threadpool v1.8.1
[INFO] [stderr]    Compiling cexpr v0.3.6
[INFO] [stderr]     Checking futures-cpupool v0.1.8
[INFO] [stderr]     Checking idna v0.2.3
[INFO] [stderr]     Checking resolv-conf v0.7.0
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking env_logger v0.8.3
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]    Compiling sass-sys v0.4.21
[INFO] [stderr]    Compiling tempdir v0.3.7
[INFO] [stderr]     Checking ghash v0.3.1
[INFO] [stderr]     Checking hkdf v0.10.0
[INFO] [stderr]     Checking aes v0.6.0
[INFO] [stderr]     Checking rand_chacha v0.3.0
[INFO] [stderr]     Checking scheduled-thread-pool v0.2.5
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking aes-gcm v0.8.0
[INFO] [stderr]     Checking r2d2 v0.8.9
[INFO] [stderr]     Checking mio-uds v0.6.8
[INFO] [stderr]     Checking rand v0.8.3
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking tokio v0.2.25
[INFO] [stderr]     Checking url v2.2.2
[INFO] [stderr]    Compiling backtrace v0.3.59
[INFO] [stderr]    Compiling brotli-sys v0.3.2
[INFO] [stderr]    Compiling openssl-sys v0.9.63
[INFO] [stderr]    Compiling libloading v0.5.2
[INFO] [stderr]     Checking uuid v0.7.4
[INFO] [stderr] error: could not compile `syn`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name syn --edition=2018 /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/syn-1.0.72/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --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=88b7591e105488de -C extra-filename=-88b7591e105488de --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-23608f24c3a1574e.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-6d7a5e7a3e5f505c.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-38987aa89d2b0d41.rmeta --cap-lints allow --cap-lints=forbid` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "5645764d755b92137a2d80fff23c608e66bcf52cab6413004a118403ca2274af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5645764d755b92137a2d80fff23c608e66bcf52cab6413004a118403ca2274af", kill_on_drop: false }`
[INFO] [stdout] 5645764d755b92137a2d80fff23c608e66bcf52cab6413004a118403ca2274af