[INFO] cloning repository https://github.com/Szczurowski/rust-example-hero
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Szczurowski/rust-example-hero" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSzczurowski%2Frust-example-hero", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSzczurowski%2Frust-example-hero'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] db5b60b1109b1fbae2531d7568717bb77b4c28fc
[INFO] documenting Szczurowski/rust-example-hero against 1.47.0 for beta-1.48-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSzczurowski%2Frust-example-hero" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Szczurowski/rust-example-hero on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Szczurowski/rust-example-hero
[INFO] finished tweaking git repo https://github.com/Szczurowski/rust-example-hero
[INFO] tweaked toml for git repo https://github.com/Szczurowski/rust-example-hero written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/Szczurowski/rust-example-hero already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded isatty v0.1.8
[INFO] [stderr]   Downloaded textnonce v0.6.4
[INFO] [stderr]   Downloaded bson v0.12.3
[INFO] [stderr]   Downloaded matches v0.1.7
[INFO] [stderr]   Downloaded ryu v0.2.3
[INFO] [stderr]   Downloaded md5 v0.3.7
[INFO] [stderr]   Downloaded data-encoding v2.1.1
[INFO] [stderr]   Downloaded chrono v0.4.5
[INFO] [stderr]   Downloaded proc-macro2 v0.4.12
[INFO] [stderr]   Downloaded walkdir v2.2.0
[INFO] [stderr]   Downloaded try_from v0.2.2
[INFO] [stderr]   Downloaded notify v4.0.4
[INFO] [stderr]   Downloaded mongodb v0.3.10
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] a023ff31e5e07ccc4fc3841bac4510edc3a91bcac2cc24c60f2fa8f5008ee34e
[INFO] running `Command { std: "docker" "start" "-a" "a023ff31e5e07ccc4fc3841bac4510edc3a91bcac2cc24c60f2fa8f5008ee34e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a023ff31e5e07ccc4fc3841bac4510edc3a91bcac2cc24c60f2fa8f5008ee34e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a023ff31e5e07ccc4fc3841bac4510edc3a91bcac2cc24c60f2fa8f5008ee34e", kill_on_drop: false }`
[INFO] [stdout] a023ff31e5e07ccc4fc3841bac4510edc3a91bcac2cc24c60f2fa8f5008ee34e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "RUSTDOCFLAGS=--cap-lints=warn" "-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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3e418e8037474bf0bdc81a812677fffd73fb771a268746e948b49f301a5e6bf4
[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" "3e418e8037474bf0bdc81a812677fffd73fb771a268746e948b49f301a5e6bf4", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.12
[INFO] [stderr]    Compiling yansi v0.4.0
[INFO] [stderr]    Compiling cc v1.0.18
[INFO] [stderr]    Compiling matches v0.1.7
[INFO] [stderr]     Checking byteorder v1.2.4
[INFO] [stderr]    Compiling unicode-normalization v0.1.7
[INFO] [stderr]    Compiling cfg-if v0.1.5
[INFO] [stderr]    Compiling serde v1.0.71
[INFO] [stderr]    Compiling safemem v0.2.0
[INFO] [stderr]    Compiling percent-encoding v1.0.1
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling untrusted v0.6.2
[INFO] [stderr]    Compiling num-traits v0.2.5
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling ryu v0.2.3
[INFO] [stderr]    Compiling traitobject v0.1.0
[INFO] [stderr]    Compiling language-tags v0.2.2
[INFO] [stderr]    Compiling typeable v0.1.2
[INFO] [stderr]    Compiling bitflags v1.0.3
[INFO] [stderr]    Compiling state v0.4.1
[INFO] [stderr]    Compiling indexmap v1.0.1
[INFO] [stderr]    Compiling gcc v0.3.54
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]     Checking itoa v0.4.2
[INFO] [stderr]     Checking bitflags v0.4.0
[INFO] [stderr]     Checking utf8-ranges v1.0.0
[INFO] [stderr]     Checking slab v0.1.3
[INFO] [stderr]     Checking same-file v1.0.2
[INFO] [stderr]     Checking bytes v0.3.0
[INFO] [stderr]     Checking md5 v0.3.7
[INFO] [stderr]     Checking semver-parser v0.7.0
[INFO] [stderr]     Checking linked-hash-map v0.5.1
[INFO] [stderr]     Checking rustc-serialize v0.3.24
[INFO] [stderr]     Checking hex v0.3.2
[INFO] [stderr]     Checking try_from v0.2.2
[INFO] [stderr]     Checking data-encoding v2.1.1
[INFO] [stderr]     Checking separator v0.3.1
[INFO] [stderr]     Checking bufstream v0.1.3
[INFO] [stderr]    Compiling ws2_32-sys v0.2.1
[INFO] [stderr]    Compiling time v0.1.40
[INFO] [stderr]     Checking memchr v2.0.1
[INFO] [stderr]    Compiling num_cpus v1.8.0
[INFO] [stderr]     Checking inotify v0.3.0
[INFO] [stderr]     Checking isatty v0.1.8
[INFO] [stderr]     Checking log v0.4.3
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking filetime v0.1.15
[INFO] [stderr]    Compiling unicode-bidi v0.3.4
[INFO] [stderr]    Compiling unreachable v1.0.0
[INFO] [stderr]     Checking base64 v0.9.2
[INFO] [stderr]     Checking base64 v0.6.0
[INFO] [stderr]     Checking regex-syntax v0.5.6
[INFO] [stderr]     Checking nix v0.5.1
[INFO] [stderr]    Compiling pear_codegen v0.1.0 (http://github.com/SergioBenitez/Pear?rev=b475140#b4751403)
[INFO] [stderr]    Compiling rocket v0.4.0-dev (https://github.com/SergioBenitez/Rocket?rev=fe9fad3#fe9fad33)
[INFO] [stderr]    Compiling rocket_codegen v0.4.0-dev (https://github.com/SergioBenitez/Rocket?rev=fe9fad3#fe9fad33)
[INFO] [stderr]     Checking walkdir v2.2.0
[INFO] [stderr]     Checking semver v0.8.0
[INFO] [stderr]    Compiling httparse v1.3.2
[INFO] [stderr]     Checking aho-corasick v0.6.6
[INFO] [stderr]     Checking rand v0.3.22
[INFO] [stderr]    Compiling smallvec v0.6.4
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.12/src/lib.rs:49:5
[INFO] [stdout]    |
[INFO] [stdout] 49 |     feature(proc_macro_raw_ident, proc_macro_span)
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling lazy_static v1.1.0
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr] error: failed to run custom build command for `pear_codegen v0.1.0 (http://github.com/SergioBenitez/Pear?rev=b475140#b4751403)`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/pear_codegen-6cbed8c4ef00c6e4/build-script-build` (exit code: 101)
[INFO] [stderr]   --- stderr
[INFO] [stderr]   [1;31mError:[0m [37mPear requires a nightly or dev version of Rust.[0m
[INFO] [stderr]   [37mInstalled version is:[0m [33m1.47.0 (2020-10-07)[0m. [37mMinimum required:[0m [33m1.29.0-nightly (2018-07-16)[0m.
[INFO] [stderr]   thread 'main' panicked at 'Aborting compilation due to incompatible compiler.', /opt/rustwide/cargo-home/git/checkouts/pear-000cd7c33a1ee164/b475140/codegen/build.rs:31:13
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x56215b40e2e0 - std::backtrace_rs::backtrace::libunwind::trace::h577ea05e9ca4629a
[INFO] [stderr]                                  at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/../../backtrace/src/backtrace/libunwind.rs:96
[INFO] [stderr]      1:     0x56215b40e2e0 - std::backtrace_rs::backtrace::trace_unsynchronized::h50b9b72b84c7dd56
[INFO] [stderr]                                  at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/../../backtrace/src/backtrace/mod.rs:66
[INFO] [stderr]      2:     0x56215b40e2e0 - std::sys_common::backtrace::_print_fmt::h6541cf9823837fac
[INFO] [stderr]                                  at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/sys_common/backtrace.rs:79
[INFO] [stderr]      3:     0x56215b40e2e0 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hf64fbff071026df5
[INFO] [stderr]                                  at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/sys_common/backtrace.rs:58
[INFO] [stderr]      4:     0x56215b42b74c - core::fmt::write::h9ddafa4860d8adff
[INFO] [stderr]                                  at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/core/src/fmt/mod.rs:1082
[INFO] [stderr]      5:     0x56215b40bb07 - std::io::Write::write_fmt::h1d2ee292d2b65481
[INFO] [stderr]                                  at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/io/mod.rs:1514
[INFO] [stderr]      6:     0x56215b4103b0 - std::sys_common::backtrace::_print::ha25f9ff5080d886d
[INFO] [stderr]                                  at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/sys_common/backtrace.rs:61
[INFO] [stderr]      7:     0x56215b4103b0 - std::sys_common::backtrace::print::h213e8aa8dc5405c0
[INFO] [stderr]                                  at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/sys_common/backtrace.rs:48
[INFO] [stderr]      8:     0x56215b4103b0 - std::panicking::default_hook::{{closure}}::h6482fae49ef9d963
[INFO] [stderr]                                  at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/panicking.rs:200
[INFO] [stderr]      9:     0x56215b4100fc - std::panicking::default_hook::he30ad7589e0970f9
[INFO] [stderr]                                  at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/panicking.rs:219
[INFO] [stderr]     10:     0x56215b410a13 - std::panicking::rust_panic_with_hook::haa1ed36ada4ffb03
[INFO] [stderr]                                  at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/panicking.rs:569
[INFO] [stderr]     11:     0x56215b3dead8 - std::panicking::begin_panic::{{closure}}::h8fe93da824f0b050
[INFO] [stderr]                                  at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/panicking.rs:498
[INFO] [stderr]     12:     0x56215b3ddc78 - std::sys_common::backtrace::__rust_end_short_backtrace::h3febba4683342cac
[INFO] [stderr]                                  at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/sys_common/backtrace.rs:153
[INFO] [stderr]     13:     0x56215b3dea03 - std::panicking::begin_panic::h27ea9dbbd63e4df0
[INFO] [stderr]                                  at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/panicking.rs:497
[INFO] [stderr]     14:     0x56215b3dc766 - build_script_build::main::h636402088eee2a4d
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/git/checkouts/pear-000cd7c33a1ee164/b475140/codegen/build.rs:31
[INFO] [stderr]     15:     0x56215b3ddd8b - core::ops::function::FnOnce::call_once::ha3099291cd48274e
[INFO] [stderr]                                  at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/core/src/ops/function.rs:227
[INFO] [stderr]     16:     0x56215b3ddcae - std::sys_common::backtrace::__rust_begin_short_backtrace::h484edbdd30dfa0b5
[INFO] [stderr]                                  at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/sys_common/backtrace.rs:137
[INFO] [stderr]     17:     0x56215b3dda71 - std::rt::lang_start::{{closure}}::hf59f5305540f474d
[INFO] [stderr]                                  at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/rt.rs:66
[INFO] [stderr]     18:     0x56215b410e11 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h6a3209f124be2235
[INFO] [stderr]                                  at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/core/src/ops/function.rs:259
[INFO] [stderr]     19:     0x56215b410e11 - std::panicking::try::do_call::h88ce358792b64df0
[INFO] [stderr]                                  at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/panicking.rs:373
[INFO] [stderr]     20:     0x56215b410e11 - std::panicking::try::h6311c259678e50fc
[INFO] [stderr]                                  at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/panicking.rs:337
[INFO] [stderr]     21:     0x56215b410e11 - std::panic::catch_unwind::h56c5716807d659a1
[INFO] [stderr]                                  at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/panic.rs:379
[INFO] [stderr]     22:     0x56215b410e11 - std::rt::lang_start_internal::h73711f37ecfcb277
[INFO] [stderr]                                  at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/rt.rs:51
[INFO] [stderr]     23:     0x56215b3dda47 - std::rt::lang_start::hec97b05281195aa4
[INFO] [stderr]                                  at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/rt.rs:65
[INFO] [stderr]     24:     0x56215b3dd60a - main
[INFO] [stderr]     25:     0x7f7cf14630b3 - __libc_start_main
[INFO] [stderr]     26:     0x56215b3dc0ae - _start
[INFO] [stderr]     27:                0x0 - <unknown>
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0658]: use of unstable library feature 'proc_macro_def_site'
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.12/src/unstable.rs:346:27
[INFO] [stdout]     |
[INFO] [stdout] 346 |             Span::Nightly(proc_macro::Span::def_site())
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #54724 <https://github.com/rust-lang/rust/issues/54724> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0658.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "3e418e8037474bf0bdc81a812677fffd73fb771a268746e948b49f301a5e6bf4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e418e8037474bf0bdc81a812677fffd73fb771a268746e948b49f301a5e6bf4", kill_on_drop: false }`
[INFO] [stdout] 3e418e8037474bf0bdc81a812677fffd73fb771a268746e948b49f301a5e6bf4
