[INFO] crate casperlabs-contract-ffi 0.22.0 is already in cache
[INFO] testing casperlabs-contract-ffi-0.22.0 against try#41997647ba6a77908f6ef64401414feb00bccf16 for pr-71274
[INFO] extracting crate casperlabs-contract-ffi 0.22.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate casperlabs-contract-ffi 0.22.0 on toolchain 41997647ba6a77908f6ef64401414feb00bccf16
[INFO] running `"/workspace/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate casperlabs-contract-ffi 0.22.0
[INFO] finished tweaking crates.io crate casperlabs-contract-ffi 0.22.0
[INFO] tweaked toml for crates.io crate casperlabs-contract-ffi 0.22.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+41997647ba6a77908f6ef64401414feb00bccf16" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] c72cb8ec34e82db8cd4039ac8f291fd8c85717b61918708a34a431f4ecf508f2
[INFO] running `"docker" "start" "-a" "c72cb8ec34e82db8cd4039ac8f291fd8c85717b61918708a34a431f4ecf508f2"`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling base16 v0.2.1
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling wee_alloc v0.4.5
[INFO] [stderr]    Compiling crypto-mac v0.7.0
[INFO] [stderr]    Compiling digest v0.8.1
[INFO] [stderr]    Compiling failure v0.1.7
[INFO] [stderr]    Compiling blake2 v0.8.1
[INFO] [stderr]    Compiling uint v0.8.2
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling num-derive v0.2.5
[INFO] [stderr]    Compiling casperlabs-contract-ffi v0.22.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0432]: unresolved import `alloc::alloc::Alloc`
[INFO] [stderr]   --> src/contract_api/mod.rs:12:13
[INFO] [stderr]    |
[INFO] [stderr] 12 |     alloc::{Alloc, Global},
[INFO] [stderr]    |             ^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             no `Alloc` in `alloc`
[INFO] [stderr]    |             help: a similar name exists in the module: `alloc`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `alloc_array` found for struct `alloc::alloc::Global` in the current scope
[INFO] [stderr]   --> src/contract_api/mod.rs:28:14
[INFO] [stderr]    |
[INFO] [stderr] 28 |             .alloc_array(n)
[INFO] [stderr]    |              ^^^^^^^^^^^ method not found in `alloc::alloc::Global`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0432, E0599.
[INFO] [stderr] For more information about an error, try `rustc --explain E0432`.
[INFO] [stderr] error: could not compile `casperlabs-contract-ffi`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "c72cb8ec34e82db8cd4039ac8f291fd8c85717b61918708a34a431f4ecf508f2"`
[INFO] running `"docker" "rm" "-f" "c72cb8ec34e82db8cd4039ac8f291fd8c85717b61918708a34a431f4ecf508f2"`
[INFO] [stdout] c72cb8ec34e82db8cd4039ac8f291fd8c85717b61918708a34a431f4ecf508f2