[INFO] cloning repository https://github.com/ryoh/nstest
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ryoh/nstest" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fryoh%2Fnstest", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fryoh%2Fnstest'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d287131b115ddaa7e9ad00e9f4a931860f753c92
[INFO] checking ryoh/nstest against try#5ec4d3b0c83717313176eefa7d71e9d36dc83355 for 155501-infallible-never-with-reservation
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fryoh%2Fnstest" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/ryoh/nstest
[INFO] finished tweaking git repo https://github.com/ryoh/nstest
[INFO] tweaked toml for git repo https://github.com/ryoh/nstest written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ryoh/nstest on toolchain 5ec4d3b0c83717313176eefa7d71e9d36dc83355
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5ec4d3b0c83717313176eefa7d71e9d36dc83355" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ryoh/nstest already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5ec4d3b0c83717313176eefa7d71e9d36dc83355" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded errno v0.2.8
[INFO] [stderr]   Downloaded cc v1.0.72
[INFO] [stderr]   Downloaded which v3.1.1
[INFO] [stderr]   Downloaded anyhow v1.0.51
[INFO] [stderr]   Downloaded clang-sys v1.3.0
[INFO] [stderr]   Downloaded proc-macro2 v1.0.34
[INFO] [stderr]   Downloaded cexpr v0.4.0
[INFO] [stderr]   Downloaded nom v5.1.2
[INFO] [stderr]   Downloaded libloading v0.7.2
[INFO] [stderr]   Downloaded bindgen v0.58.1
[INFO] [stderr]   Downloaded quote v1.0.10
[INFO] [stderr]   Downloaded libc v0.2.112
[INFO] [stderr]   Downloaded sys-mount v1.3.0
[INFO] [stderr]   Downloaded loopdev v0.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+5ec4d3b0c83717313176eefa7d71e9d36dc83355" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d442e834cc2820cd175407892d6aad452312f1189a10d7e1184d4c455e9179dc
[INFO] running `Command { std: "docker" "start" "-a" "d442e834cc2820cd175407892d6aad452312f1189a10d7e1184d4c455e9179dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d442e834cc2820cd175407892d6aad452312f1189a10d7e1184d4c455e9179dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d442e834cc2820cd175407892d6aad452312f1189a10d7e1184d4c455e9179dc", kill_on_drop: false }`
[INFO] [stdout] d442e834cc2820cd175407892d6aad452312f1189a10d7e1184d4c455e9179dc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+5ec4d3b0c83717313176eefa7d71e9d36dc83355" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 96a10cb3c0bd9f6c9e1ad70a31805d7de31960ff87c52b1345a6aed621756b73
[INFO] running `Command { std: "docker" "start" "-a" "96a10cb3c0bd9f6c9e1ad70a31805d7de31960ff87c52b1345a6aed621756b73", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling libc v0.2.112
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling proc-macro2 v1.0.34
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling unicode-width v0.1.9
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling humantime v2.1.0
[INFO] [stderr]    Compiling ansi_term v0.12.1
[INFO] [stderr]    Compiling bindgen v0.58.1
[INFO] [stderr]    Compiling termcolor v1.1.2
[INFO] [stderr]    Compiling nom v5.1.2
[INFO] [stderr]    Compiling libloading v0.7.2
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling shlex v1.1.0
[INFO] [stderr]    Compiling lazycell v1.3.0
[INFO] [stderr]    Compiling peeking_take_while v0.1.2
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling anyhow v1.0.51
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling clang-sys v1.3.0
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling which v3.1.1
[INFO] [stderr]    Compiling clap v2.34.0
[INFO] [stderr]     Checking errno v0.2.8
[INFO] [stderr]     Checking nix v0.23.1
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling cexpr v0.4.0
[INFO] [stderr]    Compiling env_logger v0.8.4
[INFO] [stderr]    Compiling loopdev v0.3.0
[INFO] [stderr] error: failed to run custom build command for `loopdev v0.3.0`
[INFO] [stderr] note: To improve backtraces for build dependencies, set the CARGO_PROFILE_DEV_BUILD_OVERRIDE_DEBUG=true environment variable to enable debug information generation.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/loopdev-a2b05eaf727aca6b/build-script-build` (exit status: 101)
[INFO] [stderr]   --- stderr
[INFO] [stderr] 
[INFO] [stderr]   thread 'main' (727) panicked at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.34/src/fallback.rs:702:9:
[INFO] [stderr]   "enum_(unnamed_at_/usr/include/linux/loop_h_16_1)" is not a valid Ident
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x583fef57249a - std[6f277ff5891b1f2c]::backtrace_rs::backtrace::libunwind::trace
[INFO] [stderr]                                  at /rustc/5ec4d3b0c83717313176eefa7d71e9d36dc83355/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stderr]      1:     0x583fef57249a - std[6f277ff5891b1f2c]::backtrace_rs::backtrace::trace_unsynchronized::<std[6f277ff5891b1f2c]::sys::backtrace::_print_fmt::{closure#1}>
[INFO] [stderr]                                  at /rustc/5ec4d3b0c83717313176eefa7d71e9d36dc83355/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stderr]      2:     0x583fef57249a - std[6f277ff5891b1f2c]::sys::backtrace::_print_fmt
[INFO] [stderr]                                  at /rustc/5ec4d3b0c83717313176eefa7d71e9d36dc83355/library/std/src/sys/backtrace.rs:74:9
[INFO] [stderr]      3:     0x583fef57249a - <<std[6f277ff5891b1f2c]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[7866fe383a43c663]::fmt::Display>::fmt
[INFO] [stderr]                                  at /rustc/5ec4d3b0c83717313176eefa7d71e9d36dc83355/library/std/src/sys/backtrace.rs:44:26
[INFO] [stderr]      4:     0x583fef587cca - <core[7866fe383a43c663]::fmt::rt::Argument>::fmt
[INFO] [stderr]                                  at /rustc/5ec4d3b0c83717313176eefa7d71e9d36dc83355/library/core/src/fmt/rt.rs:152:76
[INFO] [stderr]      5:     0x583fef587cca - core[7866fe383a43c663]::fmt::write
[INFO] [stderr]      6:     0x583fef5773c2 - std[6f277ff5891b1f2c]::io::default_write_fmt::<std[6f277ff5891b1f2c]::sys::stdio::unix::Stderr>
[INFO] [stderr]                                  at /rustc/5ec4d3b0c83717313176eefa7d71e9d36dc83355/library/std/src/io/mod.rs:621:11
[INFO] [stderr]      7:     0x583fef5773c2 - <std[6f277ff5891b1f2c]::sys::stdio::unix::Stderr as std[6f277ff5891b1f2c]::io::Write>::write_fmt
[INFO] [stderr]                                  at /rustc/5ec4d3b0c83717313176eefa7d71e9d36dc83355/library/std/src/io/mod.rs:1976:13
[INFO] [stderr]      8:     0x583fef555aaf - <std[6f277ff5891b1f2c]::sys::backtrace::BacktraceLock>::print
[INFO] [stderr]                                  at /rustc/5ec4d3b0c83717313176eefa7d71e9d36dc83355/library/std/src/sys/backtrace.rs:47:9
[INFO] [stderr]      9:     0x583fef555aaf - std[6f277ff5891b1f2c]::panicking::default_hook::{closure#0}
[INFO] [stderr]                                  at /rustc/5ec4d3b0c83717313176eefa7d71e9d36dc83355/library/std/src/panicking.rs:292:27
[INFO] [stderr]     10:     0x583fef56d161 - std[6f277ff5891b1f2c]::panicking::default_hook
[INFO] [stderr]                                  at /rustc/5ec4d3b0c83717313176eefa7d71e9d36dc83355/library/std/src/panicking.rs:319:9
[INFO] [stderr]     11:     0x583fef56d31b - std[6f277ff5891b1f2c]::panicking::panic_with_hook
[INFO] [stderr]                                  at /rustc/5ec4d3b0c83717313176eefa7d71e9d36dc83355/library/std/src/panicking.rs:825:13
[INFO] [stderr]     12:     0x583fef555b68 - std[6f277ff5891b1f2c]::panicking::panic_handler::{closure#0}
[INFO] [stderr]                                  at /rustc/5ec4d3b0c83717313176eefa7d71e9d36dc83355/library/std/src/panicking.rs:698:13
[INFO] [stderr]     13:     0x583fef54d449 - std[6f277ff5891b1f2c]::sys::backtrace::__rust_end_short_backtrace::<std[6f277ff5891b1f2c]::panicking::panic_handler::{closure#0}, !>
[INFO] [stderr]                                  at /rustc/5ec4d3b0c83717313176eefa7d71e9d36dc83355/library/std/src/sys/backtrace.rs:182:18
[INFO] [stderr]     14:     0x583fef5564cd - __rustc[43b2ed8765c84870]::rust_begin_unwind
[INFO] [stderr]                                  at /rustc/5ec4d3b0c83717313176eefa7d71e9d36dc83355/library/std/src/panicking.rs:689:5
[INFO] [stderr]     15:     0x583fef5884bc - core[7866fe383a43c663]::panicking::panic_fmt
[INFO] [stderr]                                  at /rustc/5ec4d3b0c83717313176eefa7d71e9d36dc83355/library/core/src/panicking.rs:80:14
[INFO] [stderr]     16:     0x583fef536a5b - proc_macro2[77f402cafc5dbdaa]::fallback::validate_ident
[INFO] [stderr]     17:     0x583fef535f41 - <proc_macro2[77f402cafc5dbdaa]::fallback::Ident>::_new
[INFO] [stderr]     18:     0x583fef535eff - <proc_macro2[77f402cafc5dbdaa]::fallback::Ident>::new
[INFO] [stderr]     19:     0x583fef52cf78 - <proc_macro2[77f402cafc5dbdaa]::Ident>::new
[INFO] [stderr]     20:     0x583fef258b55 - <bindgen[e9b6451265329a5c]::ir::context::BindgenContext>::rust_ident_raw::<alloc[7c4348da68ee4e90]::borrow::Cow<str>>
[INFO] [stderr]     21:     0x583fef2584c0 - <bindgen[e9b6451265329a5c]::ir::context::BindgenContext>::rust_ident::<&alloc[7c4348da68ee4e90]::string::String>
[INFO] [stderr]     22:     0x583fef3229cb - <bindgen[e9b6451265329a5c]::ir::enum_ty::Enum as bindgen[e9b6451265329a5c]::codegen::CodeGenerator>::codegen
[INFO] [stderr]     23:     0x583fef2fff6b - <bindgen[e9b6451265329a5c]::ir::ty::Type as bindgen[e9b6451265329a5c]::codegen::CodeGenerator>::codegen
[INFO] [stderr]     24:     0x583fef2228ab - <bindgen[e9b6451265329a5c]::ir::item::Item as bindgen[e9b6451265329a5c]::codegen::CodeGenerator>::codegen
[INFO] [stderr]     25:     0x583fef3109e5 - <bindgen[e9b6451265329a5c]::ir::module::Module as bindgen[e9b6451265329a5c]::codegen::CodeGenerator>::codegen::{closure#0}
[INFO] [stderr]     26:     0x583fef2e9067 - <bindgen[e9b6451265329a5c]::ir::module::Module as bindgen[e9b6451265329a5c]::codegen::CodeGenerator>::codegen
[INFO] [stderr]     27:     0x583fef222890 - <bindgen[e9b6451265329a5c]::ir::item::Item as bindgen[e9b6451265329a5c]::codegen::CodeGenerator>::codegen
[INFO] [stderr]     28:     0x583fef30ff6a - bindgen[e9b6451265329a5c]::codegen::codegen::{closure#0}
[INFO] [stderr]     29:     0x583fef259dd8 - <bindgen[e9b6451265329a5c]::ir::context::BindgenContext>::gen::<bindgen[e9b6451265329a5c]::codegen::codegen::{closure#0}, alloc[7c4348da68ee4e90]::vec::Vec<proc_macro2[77f402cafc5dbdaa]::TokenStream>>
[INFO] [stderr]     30:     0x583fef31a34d - bindgen[e9b6451265329a5c]::codegen::codegen
[INFO] [stderr]     31:     0x583fef2e5331 - <bindgen[e9b6451265329a5c]::Bindings>::generate
[INFO] [stderr]     32:     0x583fef2e1f75 - <bindgen[e9b6451265329a5c]::Builder>::generate
[INFO] [stderr]     33:     0x583fef1dfec6 - build_script_build[74024cf88edef8a9]::main
[INFO] [stderr]     34:     0x583fef1e0f03 - <fn() as core[7866fe383a43c663]::ops::function::FnOnce<()>>::call_once
[INFO] [stderr]     35:     0x583fef1dfde6 - std[6f277ff5891b1f2c]::sys::backtrace::__rust_begin_short_backtrace::<fn(), ()>
[INFO] [stderr]     36:     0x583fef1dfdf9 - std[6f277ff5891b1f2c]::rt::lang_start::<()>::{closure#0}
[INFO] [stderr]     37:     0x583fef56c2c7 - <&dyn core[7866fe383a43c663]::ops::function::Fn<(), Output = i32> + core[7866fe383a43c663]::panic::unwind_safe::RefUnwindSafe + core[7866fe383a43c663]::marker::Sync as core[7866fe383a43c663]::ops::function::FnOnce<()>>::call_once
[INFO] [stderr]                                  at /rustc/5ec4d3b0c83717313176eefa7d71e9d36dc83355/library/core/src/ops/function.rs:287:21
[INFO] [stderr]     38:     0x583fef56c2c7 - std[6f277ff5891b1f2c]::panicking::catch_unwind::do_call::<&dyn core[7866fe383a43c663]::ops::function::Fn<(), Output = i32> + core[7866fe383a43c663]::panic::unwind_safe::RefUnwindSafe + core[7866fe383a43c663]::marker::Sync, i32>
[INFO] [stderr]                                  at /rustc/5ec4d3b0c83717313176eefa7d71e9d36dc83355/library/std/src/panicking.rs:581:40
[INFO] [stderr]     39:     0x583fef56c2c7 - std[6f277ff5891b1f2c]::panicking::catch_unwind::<i32, &dyn core[7866fe383a43c663]::ops::function::Fn<(), Output = i32> + core[7866fe383a43c663]::panic::unwind_safe::RefUnwindSafe + core[7866fe383a43c663]::marker::Sync>
[INFO] [stderr]                                  at /rustc/5ec4d3b0c83717313176eefa7d71e9d36dc83355/library/std/src/panicking.rs:544:19
[INFO] [stderr]     40:     0x583fef56c2c7 - std[6f277ff5891b1f2c]::panic::catch_unwind::<&dyn core[7866fe383a43c663]::ops::function::Fn<(), Output = i32> + core[7866fe383a43c663]::panic::unwind_safe::RefUnwindSafe + core[7866fe383a43c663]::marker::Sync, i32>
[INFO] [stderr]                                  at /rustc/5ec4d3b0c83717313176eefa7d71e9d36dc83355/library/std/src/panic.rs:359:14
[INFO] [stderr]     41:     0x583fef56c2c7 - std[6f277ff5891b1f2c]::rt::lang_start_internal::{closure#0}
[INFO] [stderr]                                  at /rustc/5ec4d3b0c83717313176eefa7d71e9d36dc83355/library/std/src/rt.rs:175:24
[INFO] [stderr]     42:     0x583fef56c2c7 - std[6f277ff5891b1f2c]::panicking::catch_unwind::do_call::<std[6f277ff5891b1f2c]::rt::lang_start_internal::{closure#0}, isize>
[INFO] [stderr]                                  at /rustc/5ec4d3b0c83717313176eefa7d71e9d36dc83355/library/std/src/panicking.rs:581:40
[INFO] [stderr]     43:     0x583fef56c2c7 - std[6f277ff5891b1f2c]::panicking::catch_unwind::<isize, std[6f277ff5891b1f2c]::rt::lang_start_internal::{closure#0}>
[INFO] [stderr]                                  at /rustc/5ec4d3b0c83717313176eefa7d71e9d36dc83355/library/std/src/panicking.rs:544:19
[INFO] [stderr]     44:     0x583fef56c2c7 - std[6f277ff5891b1f2c]::panic::catch_unwind::<std[6f277ff5891b1f2c]::rt::lang_start_internal::{closure#0}, isize>
[INFO] [stderr]                                  at /rustc/5ec4d3b0c83717313176eefa7d71e9d36dc83355/library/std/src/panic.rs:359:14
[INFO] [stderr]     45:     0x583fef56c2c7 - std[6f277ff5891b1f2c]::rt::lang_start_internal
[INFO] [stderr]                                  at /rustc/5ec4d3b0c83717313176eefa7d71e9d36dc83355/library/std/src/rt.rs:171:5
[INFO] [stderr]     46:     0x583fef1dfd61 - std[6f277ff5891b1f2c]::rt::lang_start::<()>
[INFO] [stderr]     47:     0x583fef1e1205 - main
[INFO] [stderr]     48:     0x7eca656211ca - <unknown>
[INFO] [stderr]     49:     0x7eca6562128b - __libc_start_main
[INFO] [stderr]     50:     0x583fef1df855 - _start
[INFO] [stderr]     51:                0x0 - <unknown>
[INFO] running `Command { std: "docker" "inspect" "96a10cb3c0bd9f6c9e1ad70a31805d7de31960ff87c52b1345a6aed621756b73", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "96a10cb3c0bd9f6c9e1ad70a31805d7de31960ff87c52b1345a6aed621756b73", kill_on_drop: false }`
[INFO] [stdout] 96a10cb3c0bd9f6c9e1ad70a31805d7de31960ff87c52b1345a6aed621756b73