[INFO] cloning repository https://github.com/mxj4/typeholder
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mxj4/typeholder" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmxj4%2Ftypeholder", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmxj4%2Ftypeholder'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 08b588d63243f4720916d09f79b8f7a8bd556774
[INFO] checking mxj4/typeholder against master#8007b506ac5da629f223b755f5a5391edd5f6d01 for pr-88041
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmxj4%2Ftypeholder" "/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/mxj4/typeholder on toolchain 8007b506ac5da629f223b755f5a5391edd5f6d01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mxj4/typeholder
[INFO] finished tweaking git repo https://github.com/mxj4/typeholder
[INFO] tweaked toml for git repo https://github.com/mxj4/typeholder written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/mxj4/typeholder already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fd4e8d3fe4c1aa19b3b0db404feeddb510e8cc7bfe52af698d84c606f5c8da8e
[INFO] running `Command { std: "docker" "start" "-a" "fd4e8d3fe4c1aa19b3b0db404feeddb510e8cc7bfe52af698d84c606f5c8da8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fd4e8d3fe4c1aa19b3b0db404feeddb510e8cc7bfe52af698d84c606f5c8da8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd4e8d3fe4c1aa19b3b0db404feeddb510e8cc7bfe52af698d84c606f5c8da8e", kill_on_drop: false }`
[INFO] [stdout] fd4e8d3fe4c1aa19b3b0db404feeddb510e8cc7bfe52af698d84c606f5c8da8e
[INFO] running `Command { std: "docker" "create" "-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" "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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4631f65fe78fb76bc1d952d7473fe7d09be62d0671b652689cdc50ed9ec3dc9f
[INFO] running `Command { std: "docker" "start" "-a" "4631f65fe78fb76bc1d952d7473fe7d09be62d0671b652689cdc50ed9ec3dc9f", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling gdk-pixbuf v0.1.3 (https://github.com/gtk-rs/gdk-pixbuf#cc1c9ab4)
[INFO] [stderr]    Compiling gio v0.1.3 (https://github.com/gtk-rs/gio#2b2b061b)
[INFO] [stderr]    Compiling cairo-rs v0.1.3 (https://github.com/gtk-rs/cairo#94c84e60)
[INFO] [stderr]    Compiling gdk v0.5.3 (https://github.com/gtk-rs/gdk#cdb612c7)
[INFO] [stderr]     Checking c_vec v1.2.1
[INFO] [stderr]    Compiling either v1.1.0
[INFO] [stderr]    Compiling gtk v0.1.3 (https://github.com/gtk-rs/gtk#6f83f435)
[INFO] [stderr]    Compiling linked-hash-map v0.4.2
[INFO] [stderr]     Checking peresil v0.3.0
[INFO] [stderr]     Checking typed-arena v1.3.0
[INFO] [stderr]     Checking gettext-rs v0.3.0
[INFO] [stderr]    Compiling glib-sys v0.3.4 (https://github.com/gtk-rs/sys#af83826e)
[INFO] [stderr]    Compiling gobject-sys v0.3.4 (https://github.com/gtk-rs/sys#af83826e)
[INFO] [stderr]    Compiling gio-sys v0.3.4 (https://github.com/gtk-rs/sys#af83826e)
[INFO] [stderr]    Compiling cairo-sys-rs v0.3.4 (https://github.com/gtk-rs/cairo#94c84e60)
[INFO] [stderr]    Compiling gdk-pixbuf-sys v0.3.4 (https://github.com/gtk-rs/sys#af83826e)
[INFO] [stderr]    Compiling pango-sys v0.3.4 (https://github.com/gtk-rs/sys#af83826e)
[INFO] [stderr]    Compiling gdk-sys v0.3.4 (https://github.com/gtk-rs/sys#af83826e)
[INFO] [stderr]    Compiling atk-sys v0.3.4 (https://github.com/gtk-rs/sys#af83826e)
[INFO] [stderr]    Compiling gtk-sys v0.3.4 (https://github.com/gtk-rs/sys#af83826e)
[INFO] [stderr]    Compiling itertools v0.6.1
[INFO] [stderr]     Checking sxd-document v0.2.3
[INFO] [stderr]    Compiling typeholder v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the feature `slice_patterns` has been stable since 1.42.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> build.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(slice_patterns)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: failed to run custom build command for `typeholder v0.0.1 (/opt/rustwide/workdir)`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/typeholder-ab5ba5469c7c8c32/build-script-build` (exit status: 101)
[INFO] [stderr]   --- stderr
[INFO] [stderr]   thread 'main' panicked at 'attempted to leave type `linked_hash_map::Node<&str, std::vec::Vec<(&str, &str)>>` uninitialized, which is invalid', /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/linked-hash-map-0.4.2/src/lib.rs:174:52
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x55c83e194810 - std::backtrace_rs::backtrace::libunwind::trace::h0197874f43e7190f
[INFO] [stderr]                                  at /rustc/8007b506ac5da629f223b755f5a5391edd5f6d01/library/std/src/../../backtrace/src/backtrace/libunwind.rs:90:5
[INFO] [stderr]      1:     0x55c83e194810 - std::backtrace_rs::backtrace::trace_unsynchronized::hfdfd566bbbda6f2d
[INFO] [stderr]                                  at /rustc/8007b506ac5da629f223b755f5a5391edd5f6d01/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      2:     0x55c83e194810 - std::sys_common::backtrace::_print_fmt::hb3b4707c15b032a1
[INFO] [stderr]                                  at /rustc/8007b506ac5da629f223b755f5a5391edd5f6d01/library/std/src/sys_common/backtrace.rs:67:5
[INFO] [stderr]      3:     0x55c83e194810 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::had1dceac8b072f88
[INFO] [stderr]                                  at /rustc/8007b506ac5da629f223b755f5a5391edd5f6d01/library/std/src/sys_common/backtrace.rs:46:22
[INFO] [stderr]      4:     0x55c83e1aed3c - core::fmt::write::h9a6d9c74526a6c1b
[INFO] [stderr]                                  at /rustc/8007b506ac5da629f223b755f5a5391edd5f6d01/library/core/src/fmt/mod.rs:1117:17
[INFO] [stderr]      5:     0x55c83e192fa5 - std::io::Write::write_fmt::h05c3bb2bc83b8ed0
[INFO] [stderr]                                  at /rustc/8007b506ac5da629f223b755f5a5391edd5f6d01/library/std/src/io/mod.rs:1667:15
[INFO] [stderr]      6:     0x55c83e195f7b - std::sys_common::backtrace::_print::h10f0826b2a586b58
[INFO] [stderr]                                  at /rustc/8007b506ac5da629f223b755f5a5391edd5f6d01/library/std/src/sys_common/backtrace.rs:49:5
[INFO] [stderr]      7:     0x55c83e195f7b - std::sys_common::backtrace::print::h0d4242fbd1ac3eb6
[INFO] [stderr]                                  at /rustc/8007b506ac5da629f223b755f5a5391edd5f6d01/library/std/src/sys_common/backtrace.rs:36:9
[INFO] [stderr]      8:     0x55c83e195f7b - std::panicking::default_hook::{{closure}}::h275ead39fe8b8e2a
[INFO] [stderr]                                  at /rustc/8007b506ac5da629f223b755f5a5391edd5f6d01/library/std/src/panicking.rs:210:50
[INFO] [stderr]      9:     0x55c83e195af0 - std::panicking::default_hook::h5505d4d90f5984d9
[INFO] [stderr]                                  at /rustc/8007b506ac5da629f223b755f5a5391edd5f6d01/library/std/src/panicking.rs:227:9
[INFO] [stderr]     10:     0x55c83e196644 - std::panicking::rust_panic_with_hook::h2f8980d1d9fd4ca0
[INFO] [stderr]                                  at /rustc/8007b506ac5da629f223b755f5a5391edd5f6d01/library/std/src/panicking.rs:624:17
[INFO] [stderr]     11:     0x55c83e1960f2 - std::panicking::begin_panic_handler::{{closure}}::hd87853ef7e40ae97
[INFO] [stderr]                                  at /rustc/8007b506ac5da629f223b755f5a5391edd5f6d01/library/std/src/panicking.rs:519:13
[INFO] [stderr]     12:     0x55c83e194d14 - std::sys_common::backtrace::__rust_end_short_backtrace::hcab167aa940694a2
[INFO] [stderr]                                  at /rustc/8007b506ac5da629f223b755f5a5391edd5f6d01/library/std/src/sys_common/backtrace.rs:141:18
[INFO] [stderr]     13:     0x55c83e196089 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/8007b506ac5da629f223b755f5a5391edd5f6d01/library/std/src/panicking.rs:517:5
[INFO] [stderr]     14:     0x55c83e154e71 - core::panicking::panic_fmt::hcf5f6d96e1dd7099
[INFO] [stderr]                                  at /rustc/8007b506ac5da629f223b755f5a5391edd5f6d01/library/core/src/panicking.rs:93:14
[INFO] [stderr]     15:     0x55c83e154dbd - core::panicking::panic::hd695e3b1d0dd4ef4
[INFO] [stderr]                                  at /rustc/8007b506ac5da629f223b755f5a5391edd5f6d01/library/core/src/panicking.rs:50:5
[INFO] [stderr]     16:     0x55c83e1820e9 - core::mem::uninitialized::h6b16efbe6dedeb77
[INFO] [stderr]                                  at /rustc/8007b506ac5da629f223b755f5a5391edd5f6d01/library/core/src/mem/mod.rs:665:9
[INFO] [stderr]     17:     0x55c83e1820e9 - linked_hash_map::LinkedHashMap<K,V,S>::ensure_guard_node::ha4f1e6de6206b06c
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/linked-hash-map-0.4.2/src/lib.rs:174:52
[INFO] [stderr]     18:     0x55c83e1824ba - linked_hash_map::LinkedHashMap<K,V,S>::insert::h461fafa78906070f
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/linked-hash-map-0.4.2/src/lib.rs:305:9
[INFO] [stderr]     19:     0x55c83e181856 - <linked_hash_map::LinkedHashMap<K,V,S> as core::iter::traits::collect::Extend<(K,V)>>::extend::h6d526de5b3bd230e
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/linked-hash-map-0.4.2/src/lib.rs:729:13
[INFO] [stderr]     20:     0x55c83e181968 - <linked_hash_map::LinkedHashMap<K,V,S> as core::iter::traits::collect::FromIterator<(K,V)>>::from_iter::h544e096483659372
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/linked-hash-map-0.4.2/src/lib.rs:748:9
[INFO] [stderr]     21:     0x55c83e169ec6 - core::iter::traits::iterator::Iterator::collect::h5d1d8ae4ccd71dd8
[INFO] [stderr]                                  at /rustc/8007b506ac5da629f223b755f5a5391edd5f6d01/library/core/src/iter/traits/iterator.rs:1745:9
[INFO] [stderr]     22:     0x55c83e16edf8 - build_script_build::generate_scripts_macro::h3d5e69edf1e38110
[INFO] [stderr]                                  at /opt/rustwide/workdir/build.rs:60:59
[INFO] [stderr]     23:     0x55c83e16e5fb - build_script_build::main::hce40cce6277e921f
[INFO] [stderr]                                  at /opt/rustwide/workdir/build.rs:25:9
[INFO] [stderr]     24:     0x55c83e1674bb - core::ops::function::FnOnce::call_once::hddee19e5712a484c
[INFO] [stderr]                                  at /rustc/8007b506ac5da629f223b755f5a5391edd5f6d01/library/core/src/ops/function.rs:227:5
[INFO] [stderr]     25:     0x55c83e17ef2e - std::sys_common::backtrace::__rust_begin_short_backtrace::h01fa8c732e4ef61a
[INFO] [stderr]                                  at /rustc/8007b506ac5da629f223b755f5a5391edd5f6d01/library/std/src/sys_common/backtrace.rs:125:18
[INFO] [stderr]     26:     0x55c83e177501 - std::rt::lang_start::{{closure}}::ha1a51e3e8ca88ad5
[INFO] [stderr]                                  at /rustc/8007b506ac5da629f223b755f5a5391edd5f6d01/library/std/src/rt.rs:63:18
[INFO] [stderr]     27:     0x55c83e196b4a - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h5e3bbb97afe2bb03
[INFO] [stderr]                                  at /rustc/8007b506ac5da629f223b755f5a5391edd5f6d01/library/core/src/ops/function.rs:259:13
[INFO] [stderr]     28:     0x55c83e196b4a - std::panicking::try::do_call::h48c2d717cec4bdcb
[INFO] [stderr]                                  at /rustc/8007b506ac5da629f223b755f5a5391edd5f6d01/library/std/src/panicking.rs:403:40
[INFO] [stderr]     29:     0x55c83e196b4a - std::panicking::try::h2a49bc215893bc14
[INFO] [stderr]                                  at /rustc/8007b506ac5da629f223b755f5a5391edd5f6d01/library/std/src/panicking.rs:367:19
[INFO] [stderr]     30:     0x55c83e196b4a - std::panic::catch_unwind::h6d23b7c99550c7ff
[INFO] [stderr]                                  at /rustc/8007b506ac5da629f223b755f5a5391edd5f6d01/library/std/src/panic.rs:129:14
[INFO] [stderr]     31:     0x55c83e196b4a - std::rt::lang_start_internal::{{closure}}::h251a0c0729f15896
[INFO] [stderr]                                  at /rustc/8007b506ac5da629f223b755f5a5391edd5f6d01/library/std/src/rt.rs:45:48
[INFO] [stderr]     32:     0x55c83e196b4a - std::panicking::try::do_call::h4830e784a9b9d1ad
[INFO] [stderr]                                  at /rustc/8007b506ac5da629f223b755f5a5391edd5f6d01/library/std/src/panicking.rs:403:40
[INFO] [stderr]     33:     0x55c83e196b4a - std::panicking::try::h0427859d2ad3b3b9
[INFO] [stderr]                                  at /rustc/8007b506ac5da629f223b755f5a5391edd5f6d01/library/std/src/panicking.rs:367:19
[INFO] [stderr]     34:     0x55c83e196b4a - std::panic::catch_unwind::h4079bfb63395be0f
[INFO] [stderr]                                  at /rustc/8007b506ac5da629f223b755f5a5391edd5f6d01/library/std/src/panic.rs:129:14
[INFO] [stderr]     35:     0x55c83e196b4a - std::rt::lang_start_internal::h408e9d26a25a1f08
[INFO] [stderr]                                  at /rustc/8007b506ac5da629f223b755f5a5391edd5f6d01/library/std/src/rt.rs:45:20
[INFO] [stderr]     36:     0x55c83e1774d0 - std::rt::lang_start::h2d3ec3faf010da89
[INFO] [stderr]                                  at /rustc/8007b506ac5da629f223b755f5a5391edd5f6d01/library/std/src/rt.rs:62:5
[INFO] [stderr]     37:     0x55c83e17049c - main
[INFO] [stderr]     38:     0x7f0f43c3f0b3 - __libc_start_main
[INFO] [stderr]     39:     0x55c83e1555ee - _start
[INFO] [stderr]     40:                0x0 - <unknown>
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "4631f65fe78fb76bc1d952d7473fe7d09be62d0671b652689cdc50ed9ec3dc9f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4631f65fe78fb76bc1d952d7473fe7d09be62d0671b652689cdc50ed9ec3dc9f", kill_on_drop: false }`
[INFO] [stdout] 4631f65fe78fb76bc1d952d7473fe7d09be62d0671b652689cdc50ed9ec3dc9f