[INFO] cloning repository https://github.com/winguse/udp-prepend
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/winguse/udp-prepend" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwinguse%2Fudp-prepend", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwinguse%2Fudp-prepend'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 82fe29d25a5caa7a19ae272cf7180457eca97312
[INFO] checking winguse/udp-prepend against try#39e1293fce4b650061e85dda88aa428f726a8444 for pr-88041
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwinguse%2Fudp-prepend" "/workspace/builds/worker-61/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-61/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/winguse/udp-prepend on toolchain 39e1293fce4b650061e85dda88aa428f726a8444
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+39e1293fce4b650061e85dda88aa428f726a8444" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/winguse/udp-prepend
[INFO] finished tweaking git repo https://github.com/winguse/udp-prepend
[INFO] tweaked toml for git repo https://github.com/winguse/udp-prepend written to /workspace/builds/worker-61/source/Cargo.toml
[INFO] crate git repo https://github.com/winguse/udp-prepend already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+39e1293fce4b650061e85dda88aa428f726a8444" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded async-stream v0.3.0
[INFO] [stderr]   Downloaded gloo-timers v0.2.1
[INFO] [stderr]   Downloaded async-lock v2.3.0
[INFO] [stderr]   Downloaded futures-channel v0.3.12
[INFO] [stderr]   Downloaded async-global-executor v2.0.2
[INFO] [stderr]   Downloaded async-mutex v1.4.0
[INFO] [stderr]   Downloaded async-channel v1.5.1
[INFO] [stderr]   Downloaded async-executor v1.4.0
[INFO] [stderr]   Downloaded fastrand v1.4.0
[INFO] [stderr]   Downloaded futures-io v0.3.12
[INFO] [stderr]   Downloaded kv-log-macro v1.0.7
[INFO] [stderr]   Downloaded vec-arena v1.0.0
[INFO] [stderr]   Downloaded async-io v1.3.1
[INFO] [stderr]   Downloaded futures-executor v0.3.12
[INFO] [stderr]   Downloaded quote v1.0.8
[INFO] [stderr]   Downloaded async-stream-impl v0.3.0
[INFO] [stderr]   Downloaded futures-util v0.3.12
[INFO] [stderr]   Downloaded log v0.4.13
[INFO] [stderr]   Downloaded futures-core v0.3.12
[INFO] [stderr]   Downloaded syn v1.0.58
[INFO] [stderr]   Downloaded blocking v1.0.2
[INFO] [stderr]   Downloaded futures-macro v0.3.12
[INFO] [stderr]   Downloaded futures-sink v0.3.12
[INFO] [stderr]   Downloaded once_cell v1.5.2
[INFO] [stderr]   Downloaded futures-task v0.3.12
[INFO] [stderr]   Downloaded bumpalo v3.4.0
[INFO] [stderr]   Downloaded futures v0.3.12
[INFO] [stderr]   Downloaded atomic-waker v1.0.0
[INFO] [stderr]   Downloaded wepoll-sys v3.0.1
[INFO] [stderr]   Downloaded nb-connect v1.0.2
[INFO] [stderr]   Downloaded cc v1.0.66
[INFO] [stderr]   Downloaded polling v2.0.2
[INFO] [stderr]   Downloaded libc v0.2.82
[INFO] [stderr]   Downloaded async-std v1.9.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-61/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-61/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" "+39e1293fce4b650061e85dda88aa428f726a8444" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ea0f5fb6485ee04f11deaf3979e9223b4c7f6ba8024723c044c90979959c7220
[INFO] running `Command { std: "docker" "start" "-a" "ea0f5fb6485ee04f11deaf3979e9223b4c7f6ba8024723c044c90979959c7220", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ea0f5fb6485ee04f11deaf3979e9223b4c7f6ba8024723c044c90979959c7220", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ea0f5fb6485ee04f11deaf3979e9223b4c7f6ba8024723c044c90979959c7220", kill_on_drop: false }`
[INFO] [stdout] ea0f5fb6485ee04f11deaf3979e9223b4c7f6ba8024723c044c90979959c7220
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-61/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-61/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" "+39e1293fce4b650061e85dda88aa428f726a8444" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 753eddaabedff479626f5ca4d6978b908a630a21d856359861af36fdb74f6410
[INFO] running `Command { std: "docker" "start" "-a" "753eddaabedff479626f5ca4d6978b908a630a21d856359861af36fdb74f6410", kill_on_drop: false }`
[INFO] [stderr] error: failed to run `rustc` to learn about target-specific information
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc - --crate-name ___ --print=file-names --cap-lints=forbid --crate-type bin --crate-type rlib --crate-type dylib --crate-type cdylib --crate-type staticlib --crate-type proc-macro --print=sysroot --print=cfg` (exit status: 101)
[INFO] [stderr]   --- stderr
[INFO] [stderr]   thread 'rustc' panicked at 'failed to create jobserver: Custom { kind: PermissionDenied, error: "failed to increase jobserver pipe capacity from 4096 to 8192; jobserver otherwise might deadlock" }', compiler/rustc_data_structures/src/jobserver.rs:23:38
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x7fbfd7007630 - std::backtrace_rs::backtrace::libunwind::trace::h0197874f43e7190f
[INFO] [stderr]                                  at /rustc/39e1293fce4b650061e85dda88aa428f726a8444/library/std/src/../../backtrace/src/backtrace/libunwind.rs:90:5
[INFO] [stderr]      1:     0x7fbfd7007630 - std::backtrace_rs::backtrace::trace_unsynchronized::hfdfd566bbbda6f2d
[INFO] [stderr]                                  at /rustc/39e1293fce4b650061e85dda88aa428f726a8444/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      2:     0x7fbfd7007630 - std::sys_common::backtrace::_print_fmt::hb3b4707c15b032a1
[INFO] [stderr]                                  at /rustc/39e1293fce4b650061e85dda88aa428f726a8444/library/std/src/sys_common/backtrace.rs:67:5
[INFO] [stderr]      3:     0x7fbfd7007630 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::had1dceac8b072f88
[INFO] [stderr]                                  at /rustc/39e1293fce4b650061e85dda88aa428f726a8444/library/std/src/sys_common/backtrace.rs:46:22
[INFO] [stderr]      4:     0x7fbfd7075bfc - core::fmt::write::h9a6d9c74526a6c1b
[INFO] [stderr]                                  at /rustc/39e1293fce4b650061e85dda88aa428f726a8444/library/core/src/fmt/mod.rs:1117:17
[INFO] [stderr]      5:     0x7fbfd6ff8e85 - std::io::Write::write_fmt::h05c3bb2bc83b8ed0
[INFO] [stderr]                                  at /rustc/39e1293fce4b650061e85dda88aa428f726a8444/library/std/src/io/mod.rs:1667:15
[INFO] [stderr]      6:     0x7fbfd700abfb - std::sys_common::backtrace::_print::h10f0826b2a586b58
[INFO] [stderr]                                  at /rustc/39e1293fce4b650061e85dda88aa428f726a8444/library/std/src/sys_common/backtrace.rs:49:5
[INFO] [stderr]      7:     0x7fbfd700abfb - std::sys_common::backtrace::print::h0d4242fbd1ac3eb6
[INFO] [stderr]                                  at /rustc/39e1293fce4b650061e85dda88aa428f726a8444/library/std/src/sys_common/backtrace.rs:36:9
[INFO] [stderr]      8:     0x7fbfd700abfb - std::panicking::default_hook::{{closure}}::h275ead39fe8b8e2a
[INFO] [stderr]                                  at /rustc/39e1293fce4b650061e85dda88aa428f726a8444/library/std/src/panicking.rs:210:50
[INFO] [stderr]      9:     0x7fbfd700a770 - std::panicking::default_hook::h5505d4d90f5984d9
[INFO] [stderr]                                  at /rustc/39e1293fce4b650061e85dda88aa428f726a8444/library/std/src/panicking.rs:227:9
[INFO] [stderr]     10:     0x7fbfd77eb3f1 - rustc_driver::DEFAULT_HOOK::{{closure}}::{{closure}}::hee2ebc973f73a8d6
[INFO] [stderr]     11:     0x7fbfd700b429 - std::panicking::rust_panic_with_hook::h2f8980d1d9fd4ca0
[INFO] [stderr]                                  at /rustc/39e1293fce4b650061e85dda88aa428f726a8444/library/std/src/panicking.rs:628:17
[INFO] [stderr]     12:     0x7fbfd700aee0 - std::panicking::begin_panic_handler::{{closure}}::hd87853ef7e40ae97
[INFO] [stderr]                                  at /rustc/39e1293fce4b650061e85dda88aa428f726a8444/library/std/src/panicking.rs:521:13
[INFO] [stderr]     13:     0x7fbfd7007b34 - std::sys_common::backtrace::__rust_end_short_backtrace::hcab167aa940694a2
[INFO] [stderr]                                  at /rustc/39e1293fce4b650061e85dda88aa428f726a8444/library/std/src/sys_common/backtrace.rs:141:18
[INFO] [stderr]     14:     0x7fbfd700ae49 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/39e1293fce4b650061e85dda88aa428f726a8444/library/std/src/panicking.rs:517:5
[INFO] [stderr]     15:     0x7fbfd6fd6791 - core::panicking::panic_fmt::hcf5f6d96e1dd7099
[INFO] [stderr]                                  at /rustc/39e1293fce4b650061e85dda88aa428f726a8444/library/core/src/panicking.rs:93:14
[INFO] [stderr]     16:     0x7fbfd6fd6883 - core::result::unwrap_failed::he898b02f57993c42
[INFO] [stderr]                                  at /rustc/39e1293fce4b650061e85dda88aa428f726a8444/library/core/src/result.rs:1617:5
[INFO] [stderr]     17:     0x7fbfd9c6232e - core::ops::function::FnOnce::call_once::hb8a895ec037a41bd
[INFO] [stderr]     18:     0x7fbfd9c625dd - std::sync::once::Once::call_once_force::{{closure}}::hf22fcb7786575799
[INFO] [stderr]     19:     0x7fbfd6fd443c - std::sync::once::Once::call_inner::hc2acff14d719784d
[INFO] [stderr]                                  at /rustc/39e1293fce4b650061e85dda88aa428f726a8444/library/std/src/sync/once.rs:418:21
[INFO] [stderr]     20:     0x7fbfd9c623d4 - rustc_data_structures::jobserver::client::h6a333a6ac68471d6
[INFO] [stderr]     21:     0x7fbfd9c1abbe - rustc_session::session::build_session::h9a6e984c28ebf5d1
[INFO] [stderr]     22:     0x7fbfd92f1ca9 - rustc_interface::util::create_session::h34b8795d6c3fb4bb
[INFO] [stderr]     23:     0x7fbfd92becf0 - rustc_interface::interface::create_compiler_and_run::hbb51e06a6bec0cbf
[INFO] [stderr]     24:     0x7fbfd92b0b89 - scoped_tls::ScopedKey<T>::set::hecbcef0aa7ef3aaf
[INFO] [stderr]     25:     0x7fbfd92ad02a - std::sys_common::backtrace::__rust_begin_short_backtrace::h613e6113ac84bdcd
[INFO] [stderr]     26:     0x7fbfd92ac365 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h44574c2a5516ec83
[INFO] [stderr]     27:     0x7fbfd70180f3 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h9c4443ed82ca1eae
[INFO] [stderr]                                  at /rustc/39e1293fce4b650061e85dda88aa428f726a8444/library/alloc/src/boxed.rs:1636:9
[INFO] [stderr]     28:     0x7fbfd70180f3 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h4b334c81001270ca
[INFO] [stderr]                                  at /rustc/39e1293fce4b650061e85dda88aa428f726a8444/library/alloc/src/boxed.rs:1636:9
[INFO] [stderr]     29:     0x7fbfd70180f3 - std::sys::unix::thread::Thread::new::thread_start::h092d15d6be9ed8c7
[INFO] [stderr]                                  at /rustc/39e1293fce4b650061e85dda88aa428f726a8444/library/std/src/sys/unix/thread.rs:106:17
[INFO] [stderr]     30:     0x7fbfd6f33609 - start_thread
[INFO] [stderr]     31:     0x7fbfd6e47293 - clone
[INFO] [stderr]     32:                0x0 - <unknown>
[INFO] [stderr] 
[INFO] [stderr]   error: internal compiler error: unexpected panic
[INFO] [stderr] 
[INFO] [stderr]   note: the compiler unexpectedly panicked. this is a bug.
[INFO] [stderr] 
[INFO] [stderr]   note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md
[INFO] [stderr] 
[INFO] [stderr]   note: rustc 1.56.0-nightly (39e1293fc 2021-08-15) running on x86_64-unknown-linux-gnu
[INFO] [stderr] 
[INFO] [stderr]   note: compiler flags: --crate-type bin --crate-type rlib --crate-type dylib --crate-type cdylib --crate-type staticlib --crate-type proc-macro
[INFO] [stderr] 
[INFO] [stderr]   query stack during panic:
[INFO] [stderr]   end of query stack
[INFO] running `Command { std: "docker" "inspect" "753eddaabedff479626f5ca4d6978b908a630a21d856359861af36fdb74f6410", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "753eddaabedff479626f5ca4d6978b908a630a21d856359861af36fdb74f6410", kill_on_drop: false }`
[INFO] [stdout] 753eddaabedff479626f5ca4d6978b908a630a21d856359861af36fdb74f6410