[INFO] cloning repository https://github.com/rust-lang-nursery/rustfmt
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rust-lang-nursery/rustfmt" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frust-lang-nursery%2Frustfmt", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frust-lang-nursery%2Frustfmt'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 94035f9148d31d3f714d9c649cf2de0f0edb4f46
[INFO] checking rust-lang-nursery/rustfmt against try#4a04890980766cc79878135f5ade8c0c4321e943 for pr-65819
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frust-lang-nursery%2Frustfmt" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rust-lang-nursery/rustfmt on toolchain 4a04890980766cc79878135f5ade8c0c4321e943
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/rust-lang-nursery/rustfmt
[INFO] finished tweaking git repo https://github.com/rust-lang-nursery/rustfmt
[INFO] tweaked toml for git repo https://github.com/rust-lang-nursery/rustfmt written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/rust-lang-nursery/rustfmt already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded termize v0.1.1
[INFO] [stderr]   Downloaded annotate-snippets v0.8.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_attr v712.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_index v712.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_ast_pretty v712.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_expand v712.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_span v712.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_parse v712.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_feature v712.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_ast v712.0.0
[INFO] [stderr]   Downloaded measureme v9.1.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_ast_passes v712.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_errors v712.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_lint_defs v712.0.0
[INFO] [stderr]   Downloaded rustc-rayon v0.3.1
[INFO] [stderr]   Downloaded rustc-ap-rustc_fs_util v712.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_lexer v712.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_session v712.0.0
[INFO] [stderr]   Downloaded perf-event-open-sys v1.0.1
[INFO] [stderr]   Downloaded rustc-ap-rustc_graphviz v712.0.0
[INFO] [stderr]   Downloaded rustc-rayon-core v0.3.1
[INFO] [stderr]   Downloaded psm v0.1.8
[INFO] [stderr]   Downloaded rustc-ap-rustc_macros v712.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_data_structures v712.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_serialize v712.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_arena v712.0.0
[INFO] [stderr]   Downloaded yansi-term v0.1.1
[INFO] [stderr]   Downloaded rustc-ap-rustc_target v712.0.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/jobserver:/tmp/crater-runner-fifo:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4e0096826285f4c9233f110b7fd9ce8feee03fa472912a0fa464502668d883d1
[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" "4e0096826285f4c9233f110b7fd9ce8feee03fa472912a0fa464502668d883d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4e0096826285f4c9233f110b7fd9ce8feee03fa472912a0fa464502668d883d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e0096826285f4c9233f110b7fd9ce8feee03fa472912a0fa464502668d883d1", kill_on_drop: false }`
[INFO] [stdout] 4e0096826285f4c9233f110b7fd9ce8feee03fa472912a0fa464502668d883d1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/jobserver:/tmp/crater-runner-fifo:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "RUSTUP_TOOLCHAIN=4a04890980766cc79878135f5ade8c0c4321e943" "-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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/tmp/crater-runner-fifo/jobserver-crater-fwd" "/opt/rustwide/cargo-home/bin/cargo" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 566778472c2df0c80d721d2fdc7718ffdea6cefe6ceb82e2cabb27f52edc34ef
[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" "566778472c2df0c80d721d2fdc7718ffdea6cefe6ceb82e2cabb27f52edc34ef", kill_on_drop: false }`
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling libc v0.2.77
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.17
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.24
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling cc v1.0.54
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]     Checking smallvec v1.6.1
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]    Compiling rustc-rayon-core v0.3.1
[INFO] [stderr]     Checking ppv-lite86 v0.2.9
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking opaque-debug v0.3.0
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]     Checking arrayvec v0.5.1
[INFO] [stderr]     Checking rustc-ap-rustc_graphviz v712.0.0
[INFO] [stderr]     Checking stable_deref_trait v1.1.1
[INFO] [stderr]     Checking cpuid-bool v0.1.2
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]     Checking scoped-tls v1.0.0
[INFO] [stderr]     Checking yansi-term v0.1.1
[INFO] [stderr]     Checking rustc-ap-rustc_fs_util v712.0.0
[INFO] [stderr]    Compiling serde v1.0.110
[INFO] [stderr]    Compiling anyhow v1.0.31
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]    Compiling rustfmt-nightly v2.0.0-rc.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking unicode_categories v0.1.1
[INFO] [stderr]     Checking dunce v1.0.0
[INFO] [stderr]     Checking diff v0.1.12
[INFO] [stderr]     Checking bytecount v0.6.0
[INFO] [stderr]     Checking unicode-segmentation v1.6.0
[INFO] [stderr]     Checking rustc-workspace-hack v1.0.0
[INFO] [stderr]     Checking instant v0.1.7
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling memoffset v0.5.4
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling hashbrown v0.8.2
[INFO] [stderr]    Compiling indexmap v1.5.2
[INFO] [stderr]     Checking tracing-core v0.1.15
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking lock_api v0.4.1
[INFO] [stderr]    Compiling generic-array v0.14.4
[INFO] [stderr]     Checking unicode-normalization v0.1.12
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]    Compiling psm v0.1.8
[INFO] [stderr]    Compiling stacker v0.1.12
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]     Checking rustc-ap-rustc_lexer v712.0.0
[INFO] [stderr]     Checking annotate-snippets v0.8.0
[INFO] [stderr]     Checking walkdir v2.3.1
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]     Checking parking_lot_core v0.8.0
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking perf-event-open-sys v1.0.1
[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 dirs-sys v0.3.4
[INFO] [stderr]     Checking ena v0.14.0
[INFO] [stderr]    Compiling quote v1.0.6
[INFO] [stderr]     Checking bstr v0.2.13
[INFO] [stderr]     Checking crossbeam-queue v0.2.3
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking parking_lot v0.11.0
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking regex v1.3.7
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking block-buffer v0.9.0
[INFO] [stderr]     Checking digest v0.9.0
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]     Checking term v0.6.1
[INFO] [stderr]     Checking measureme v9.1.0
[INFO] [stderr]     Checking rustc-ap-rustc_serialize v712.0.0
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking md-5 v0.9.1
[INFO] [stderr]     Checking sha2 v0.9.2
[INFO] [stderr]     Checking sha-1 v0.9.2
[INFO] [stderr]     Checking globset v0.4.5
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking ignore v0.4.15
[INFO] [stderr]     Checking rustc-rayon v0.3.1
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling rustc-ap-rustc_macros v712.0.0
[INFO] [stderr]    Compiling tracing-attributes v0.1.11
[INFO] [stderr]    Compiling serde_derive v1.0.110
[INFO] [stderr]    Compiling thiserror-impl v1.0.19
[INFO] [stderr]    Compiling rustfmt-config_proc_macro v0.5.1 (/opt/rustwide/workdir/config_proc_macro)
[INFO] [stderr]     Checking rustc-ap-rustc_index v712.0.0
[INFO] [stderr]     Checking tracing v0.1.19
[INFO] [stderr]     Checking thiserror v1.0.19
[INFO] [stderr]     Checking rustc-ap-rustc_data_structures v712.0.0
[INFO] [stderr]     Checking rustc-ap-rustc_arena v712.0.0
[INFO] [stderr]     Checking rustc-ap-rustc_span v712.0.0
[INFO] [stderr]     Checking rustc-ap-rustc_ast v712.0.0
[INFO] [stderr]     Checking rustc-ap-rustc_target v712.0.0
[INFO] [stderr]     Checking rustc-ap-rustc_feature v712.0.0
[INFO] [stderr]     Checking toml v0.5.6
[INFO] [stderr]     Checking serde_json v1.0.53
[INFO] [stderr]     Checking rustc-ap-rustc_ast_pretty v712.0.0
[INFO] [stderr]     Checking rustc-ap-rustc_lint_defs v712.0.0
[INFO] [stderr]     Checking rustc-ap-rustc_errors v712.0.0
[INFO] [stderr]     Checking rustc-ap-rustc_session v712.0.0
[INFO] [stderr]     Checking rustc-ap-rustc_parse v712.0.0
[INFO] [stderr]     Checking rustc-ap-rustc_attr v712.0.0
[INFO] [stdout] error: environment variable `CFG_RELEASE` not defined
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustc-ap-rustc_attr-712.0.0/src/builtin.rs:594:47
[INFO] [stdout]     |
[INFO] [stdout] 594 |             let rustc_version = parse_version(env!("CFG_RELEASE"), true).unwrap();
[INFO] [stdout]     |                                               ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rustc-ap-rustc_attr`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "566778472c2df0c80d721d2fdc7718ffdea6cefe6ceb82e2cabb27f52edc34ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "566778472c2df0c80d721d2fdc7718ffdea6cefe6ceb82e2cabb27f52edc34ef", kill_on_drop: false }`
[INFO] [stdout] 566778472c2df0c80d721d2fdc7718ffdea6cefe6ceb82e2cabb27f52edc34ef