[INFO] crate mutagen-plugin 0.1.2 is already in cache
[INFO] checking mutagen-plugin-0.1.2 against master#f9fdf642bab2bfcabe1829a4c82aaf055330661b for pr-73102
[INFO] extracting crate mutagen-plugin 0.1.2 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate mutagen-plugin 0.1.2 on toolchain f9fdf642bab2bfcabe1829a4c82aaf055330661b
[INFO] running `"/workspace/cargo-home/bin/cargo" "+f9fdf642bab2bfcabe1829a4c82aaf055330661b" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate mutagen-plugin 0.1.2
[INFO] finished tweaking crates.io crate mutagen-plugin 0.1.2
[INFO] tweaked toml for crates.io crate mutagen-plugin 0.1.2 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+f9fdf642bab2bfcabe1829a4c82aaf055330661b" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+f9fdf642bab2bfcabe1829a4c82aaf055330661b" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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" "+f9fdf642bab2bfcabe1829a4c82aaf055330661b" "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] e972b809714d7dc3ac6bfa7f88b1be360c1fa66ab37f2e8b9aa1d236cd46f63c
[INFO] running `"docker" "start" "-a" "e972b809714d7dc3ac6bfa7f88b1be360c1fa66ab37f2e8b9aa1d236cd46f63c"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.18
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]    Compiling syn v1.0.31
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling mutagen v0.1.2
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking gimli v0.21.0
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling serde_json v1.0.55
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]     Checking object v0.19.0
[INFO] [stderr]     Checking rustc-demangle v0.1.16
[INFO] [stderr]     Checking itoa v0.4.5
[INFO] [stderr]    Compiling mutagen-plugin v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking regex-syntax v0.6.18
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> build.rs:15:30
[INFO] [stderr]    |
[INFO] [stderr] 15 | fn write_binop_arm(out: &mut Write,
[INFO] [stderr]    |                              ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> build.rs:59:33
[INFO] [stderr]    |
[INFO] [stderr] 59 | fn write_opassign_arm(out: &mut Write,
[INFO] [stderr]    |                                 ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr]    Compiling compiletest_rs v0.3.26
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Checking aho-corasick v0.7.10
[INFO] [stderr] error[E0557]: feature has been removed
[INFO] [stderr]  --> src/lib.rs:1:30
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(plugin_registrar, quote, rustc_private, custom_attribute)]
[INFO] [stderr]   |                              ^^^^^ feature has been removed
[INFO] [stderr] 
[INFO] [stderr] error[E0557]: feature has been removed
[INFO] [stderr]  --> src/lib.rs:1:52
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(plugin_registrar, quote, rustc_private, custom_attribute)]
[INFO] [stderr]   |                                                    ^^^^^^^^^^^^^^^^ feature has been removed
[INFO] [stderr]   |
[INFO] [stderr]   = note: removed in favor of `#![register_tool]` and `#![register_attr]`
[INFO] [stderr] 
[INFO] [stderr] error[E0463]: can't find crate for `rustc_plugin`
[INFO] [stderr]  --> src/lib.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | extern crate rustc_plugin;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0463, E0557.
[INFO] [stderr] For more information about an error, try `rustc --explain E0463`.
[INFO] [stderr] error: could not compile `mutagen-plugin`.
[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 `"docker" "inspect" "e972b809714d7dc3ac6bfa7f88b1be360c1fa66ab37f2e8b9aa1d236cd46f63c"`
[INFO] running `"docker" "rm" "-f" "e972b809714d7dc3ac6bfa7f88b1be360c1fa66ab37f2e8b9aa1d236cd46f63c"`
[INFO] [stdout] e972b809714d7dc3ac6bfa7f88b1be360c1fa66ab37f2e8b9aa1d236cd46f63c