[INFO] updating cached repository https://github.com/lightclient/simple-transfer
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 6c00129b0cfc232e503f59ae6b70c1b31b972fac
[INFO] checking lightclient/simple-transfer against master#3dbade652ed8ebac70f903e01f51cd92c4e4302c for pr-69880
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flightclient%2Fsimple-transfer" "/workspace/builds/worker-2/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/lightclient/simple-transfer on toolchain 3dbade652ed8ebac70f903e01f51cd92c4e4302c
[INFO] running `"/workspace/cargo-home/bin/cargo" "+3dbade652ed8ebac70f903e01f51cd92c4e4302c" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/lightclient/simple-transfer
[INFO] removed path dependency composer from git repo https://github.com/lightclient/simple-transfer
[INFO] finished tweaking git repo https://github.com/lightclient/simple-transfer
[INFO] tweaked toml for git repo https://github.com/lightclient/simple-transfer written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/lightclient/simple-transfer already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+3dbade652ed8ebac70f903e01f51cd92c4e4302c" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] warning: dependency (composer) specified without providing a local path, Git repository, or version to use. This will be considered an error in future versions
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: the lock file /workspace/builds/worker-2/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/workspace/cargo-home/bin/cargo" "+3dbade652ed8ebac70f903e01f51cd92c4e4302c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/workspace/cargo-home/bin/cargo" "+3dbade652ed8ebac70f903e01f51cd92c4e4302c" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] warning: dependency (composer) specified without providing a local path, Git repository, or version to use. This will be considered an error in future versions
[INFO] running `"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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+3dbade652ed8ebac70f903e01f51cd92c4e4302c" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f0fcceab2754d478283441812ca1a2c4c172983621a4bd44d2ed7ec92b073eb9
[INFO] running `"docker" "start" "-a" "f0fcceab2754d478283441812ca1a2c4c172983621a4bd44d2ed7ec92b073eb9"`
[INFO] [stderr] warning: dependency (composer) specified without providing a local path, Git repository, or version to use. This will be considered an error in future versions
[INFO] [stderr]     Checking parity-wasm v0.40.3
[INFO] [stderr]     Checking qimalloc v0.1.0
[INFO] [stderr]    Compiling num-rational v0.2.3
[INFO] [stderr]    Compiling wabt-sys v0.7.0
[INFO] [stderr]     Checking bigint v4.4.1
[INFO] [stderr]     Checking plotters v0.2.12
[INFO] [stderr]    Compiling syn v1.0.16
[INFO] [stderr]     Checking criterion-plot v0.4.1
[INFO] [stderr]     Checking imp v0.1.0
[INFO] [stderr]     Checking sheth v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking wasmi-validation v0.2.0
[INFO] [stderr]     Checking wasmi v0.5.1
[INFO] [stderr]    Compiling synstructure v0.12.3
[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-1.0.16/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C debuginfo=2 --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"' -C metadata=887267974d7b56a5 -C extra-filename=-887267974d7b56a5 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-22598ef6c87da0f4.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-fd360626638b72c9.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-84e692c0da359216.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 `"docker" "inspect" "f0fcceab2754d478283441812ca1a2c4c172983621a4bd44d2ed7ec92b073eb9"`
[INFO] running `"docker" "rm" "-f" "f0fcceab2754d478283441812ca1a2c4c172983621a4bd44d2ed7ec92b073eb9"`
[INFO] [stdout] f0fcceab2754d478283441812ca1a2c4c172983621a4bd44d2ed7ec92b073eb9