[INFO] updating cached repository https://github.com/matklad/RobinHood
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/mnt/big/crater/work/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] 0e5cb00a490059555959d12a4b56612613ecbad1
[INFO] checking matklad/RobinHood against master#9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7 for pr-64564
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmatklad%2FRobinHood" "work/builds/worker-3/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/matklad/RobinHood on toolchain 9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7-alt
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/matklad/RobinHood
[INFO] finished tweaking git repo https://github.com/matklad/RobinHood
[INFO] tweaked toml for git repo https://github.com/matklad/RobinHood written to work/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/matklad/RobinHood already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/mnt/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "+9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 87b2011e1e8e7e2c91ba33c228bef50a029b4730ea4a848c96cc2c5582a81258
[INFO] running `"docker" "start" "-a" "87b2011e1e8e7e2c91ba33c228bef50a029b4730ea4a848c96cc2c5582a81258"`
[INFO] [stderr]    Compiling rustc-serialize v0.3.21
[INFO] [stderr]    Compiling phf_shared v0.7.20
[INFO] [stderr]    Compiling byteorder v0.5.3
[INFO] [stderr]     Checking raw-cpuid v2.0.1
[INFO] [stderr]    Compiling num-integer v0.1.32
[INFO] [stderr]     Checking mmap v0.1.1
[INFO] [stderr]     Checking phf v0.7.20
[INFO] [stderr]    Compiling phf_generator v0.7.20
[INFO] [stderr]    Compiling num-iter v0.1.32
[INFO] [stderr]    Compiling phf_codegen v0.7.20
[INFO] [stderr]    Compiling num-bigint v0.1.35
[INFO] [stderr]    Compiling num-complex v0.1.35
[INFO] [stderr]    Compiling csv v0.14.7
[INFO] [stderr]    Compiling num-rational v0.1.35
[INFO] [stderr]    Compiling num v0.1.36
[INFO] [stderr]    Compiling serde v0.6.15
[INFO] [stderr]    Compiling serde_json v0.6.1
[INFO] [stderr]    Compiling x86 v0.6.1
[INFO] [stderr] error[E0635]: unknown feature `convert`
[INFO] [stderr]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/x86-0.6.1/build.rs:1:54
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![cfg_attr(feature = "performance-counter", feature(convert))]
[INFO] [stderr]   |                                                      ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0635`.
[INFO] [stderr] error: could not compile `x86`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "87b2011e1e8e7e2c91ba33c228bef50a029b4730ea4a848c96cc2c5582a81258"`
[INFO] running `"docker" "rm" "-f" "87b2011e1e8e7e2c91ba33c228bef50a029b4730ea4a848c96cc2c5582a81258"`
[INFO] [stdout] 87b2011e1e8e7e2c91ba33c228bef50a029b4730ea4a848c96cc2c5582a81258