[INFO] fetching crate cargo-modules 0.4.8...
[INFO] checking cargo-modules-0.4.8 against try#d990716b6a1fdde1300748828a9c9e79dfd0b898 for pr-74846
[INFO] extracting crate cargo-modules 0.4.8 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate cargo-modules 0.4.8 on toolchain d990716b6a1fdde1300748828a9c9e79dfd0b898
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d990716b6a1fdde1300748828a9c9e79dfd0b898" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cargo-modules 0.4.8
[INFO] finished tweaking crates.io crate cargo-modules 0.4.8
[INFO] tweaked toml for crates.io crate cargo-modules 0.4.8 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate crates.io crate cargo-modules 0.4.8 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d990716b6a1fdde1300748828a9c9e79dfd0b898" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rustc-ap-rustc_macros v667.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_graphviz v667.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_errors v667.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_lexer v667.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_ast_pretty v667.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_index v667.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_session v667.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_feature v667.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_target v667.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_fs_util v667.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_ast v667.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_span v667.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_serialize v667.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_parse v667.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_arena v667.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_data_structures v667.0.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+d990716b6a1fdde1300748828a9c9e79dfd0b898" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 11d8a5e34d4112045c2f44da963783c06f2fd78df01392dfdd0ef439f9264e5c
[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" "11d8a5e34d4112045c2f44da963783c06f2fd78df01392dfdd0ef439f9264e5c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "11d8a5e34d4112045c2f44da963783c06f2fd78df01392dfdd0ef439f9264e5c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "11d8a5e34d4112045c2f44da963783c06f2fd78df01392dfdd0ef439f9264e5c", kill_on_drop: false }`
[INFO] [stdout] 11d8a5e34d4112045c2f44da963783c06f2fd78df01392dfdd0ef439f9264e5c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+d990716b6a1fdde1300748828a9c9e79dfd0b898" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6f41a51ce0cbbf26ca6a588b4e7f76daadc061bd00bd9430016de984f06207a4
[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" "6f41a51ce0cbbf26ca6a588b4e7f76daadc061bd00bd9430016de984f06207a4", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.13
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.22
[INFO] [stderr]     Checking smallvec v1.4.0
[INFO] [stderr]    Compiling cc v1.0.54
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling rustc-rayon-core v0.3.0
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]     Checking rustc-hash v1.1.0
[INFO] [stderr]     Checking rustc-ap-rustc_graphviz v667.0.0
[INFO] [stderr]     Checking stable_deref_trait v1.1.1
[INFO] [stderr]     Checking scoped-tls v1.0.0
[INFO] [stderr]    Compiling version_check v0.9.1
[INFO] [stderr]    Compiling rustc-ap-rustc_ast v667.0.0
[INFO] [stderr]    Compiling rustc-ap-rustc_target v667.0.0
[INFO] [stderr]     Checking termcolor v1.1.0
[INFO] [stderr]     Checking annotate-snippets v0.8.0
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking rustc-ap-rustc_fs_util v667.0.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking arrayvec v0.5.1
[INFO] [stderr]     Checking json v0.12.4
[INFO] [stderr]     Checking lock_api v0.3.4
[INFO] [stderr]     Checking crossbeam-utils v0.6.6
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]     Checking unicode-normalization v0.1.12
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking rustc-ap-rustc_lexer v667.0.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.2
[INFO] [stderr]    Compiling proc-macro-error v1.0.2
[INFO] [stderr]    Compiling memoffset v0.5.4
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling indexmap v1.3.2
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking parking_lot_core v0.7.2
[INFO] [stderr]     Checking memmap v0.7.0
[INFO] [stderr]     Checking jobserver v0.1.21
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking termize v0.1.1
[INFO] [stderr]     Checking crossbeam-queue v0.1.2
[INFO] [stderr]     Checking smallvec v0.6.13
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]     Checking clap v2.33.1
[INFO] [stderr]     Checking colored v1.9.3
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking ena v0.14.0
[INFO] [stderr]     Checking parking_lot v0.10.2
[INFO] [stderr]     Checking once_cell v1.4.0
[INFO] [stderr]    Compiling quote v1.0.6
[INFO] [stderr]    Compiling psm v0.1.8
[INFO] [stderr]    Compiling stacker v0.1.9
[INFO] [stderr]    Compiling parking_lot_core v0.6.2
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]     Checking rustc-ap-rustc_serialize v667.0.0
[INFO] [stderr]     Checking petgraph v0.5.1
[INFO] [stderr]     Checking generic-array v0.12.3
[INFO] [stderr]     Checking measureme v0.7.1
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]     Checking digest v0.8.1
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]     Checking md-5 v0.8.0
[INFO] [stderr]     Checking sha-1 v0.8.2
[INFO] [stderr]     Checking rustc-ap-rustc_index v667.0.0
[INFO] [stderr]     Checking rustc-rayon v0.3.0
[INFO] [stderr]     Checking rustc-ap-rustc_data_structures v667.0.0
[INFO] [stderr]     Checking rustc-ap-rustc_arena v667.0.0
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]    Compiling rustc-ap-rustc_macros v667.0.0
[INFO] [stderr]    Compiling structopt-derive v0.4.8
[INFO] [stderr]     Checking rustc-ap-rustc_span v667.0.0
[INFO] [stderr]     Checking rustc-ap-rustc_feature v667.0.0
[INFO] [stderr]     Checking rustc-ap-rustc_errors v667.0.0
[INFO] [stderr]     Checking structopt v0.3.15
[INFO] [stdout] error[E0635]: unknown feature `const_transmute`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustc-ap-rustc_ast-667.0.0/lib.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 | #![feature(const_transmute)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rustc-ap-rustc_ast`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "6f41a51ce0cbbf26ca6a588b4e7f76daadc061bd00bd9430016de984f06207a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f41a51ce0cbbf26ca6a588b4e7f76daadc061bd00bd9430016de984f06207a4", kill_on_drop: false }`
[INFO] [stdout] 6f41a51ce0cbbf26ca6a588b4e7f76daadc061bd00bd9430016de984f06207a4