[INFO] fetching crate tweakster 0.0.3...
[INFO] building tweakster-0.0.3 against try#4987e9d4227139400384ab59296ffee3b0fb1183 for pr-146237-2
[INFO] extracting crate tweakster 0.0.3 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate tweakster 0.0.3
[INFO] finished tweaking crates.io crate tweakster 0.0.3
[INFO] tweaked toml for crates.io crate tweakster 0.0.3 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate tweakster 0.0.3 on toolchain 4987e9d4227139400384ab59296ffee3b0fb1183
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate tweakster 0.0.3 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" "+4987e9d4227139400384ab59296ffee3b0fb1183" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e3335b0f609cc01b232c9803864c6b5e438a26f7eee88feda54053e21fcda17e
[INFO] running `Command { std: "docker" "start" "-a" "e3335b0f609cc01b232c9803864c6b5e438a26f7eee88feda54053e21fcda17e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e3335b0f609cc01b232c9803864c6b5e438a26f7eee88feda54053e21fcda17e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e3335b0f609cc01b232c9803864c6b5e438a26f7eee88feda54053e21fcda17e", kill_on_drop: false }`
[INFO] [stdout] e3335b0f609cc01b232c9803864c6b5e438a26f7eee88feda54053e21fcda17e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 856b3f5cf7213b01d71b291782eada6b1ec2c9b1275bc8b8a408ce9329d001de
[INFO] running `Command { std: "docker" "start" "-a" "856b3f5cf7213b01d71b291782eada6b1ec2c9b1275bc8b8a408ce9329d001de", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.37
[INFO] [stderr]    Compiling syn v1.0.91
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling libc v0.2.123
[INFO] [stderr]    Compiling minimal-lexical v0.2.1
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling bindgen v0.59.2
[INFO] [stderr]    Compiling regex-syntax v0.6.27
[INFO] [stderr]    Compiling lazycell v1.3.0
[INFO] [stderr]    Compiling libloading v0.7.3
[INFO] [stderr]    Compiling peeking_take_while v0.1.2
[INFO] [stderr]    Compiling shlex v1.1.0
[INFO] [stderr]    Compiling serde_derive v1.0.136
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]    Compiling unicode-segmentation v1.9.0
[INFO] [stderr]    Compiling once_cell v1.13.0
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling tracing-core v0.1.28
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling pin-project-lite v0.2.9
[INFO] [stderr]    Compiling plain v0.2.3
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling clang-sys v1.3.3
[INFO] [stderr]    Compiling nom v7.1.1
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling errno v0.2.8
[INFO] [stderr]    Compiling clap v2.34.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling regex v1.6.0
[INFO] [stderr]    Compiling cexpr v0.6.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling tracing-attributes v0.1.22
[INFO] [stderr]    Compiling thiserror-impl v1.0.31
[INFO] [stderr]    Compiling scroll_derive v0.10.5
[INFO] [stderr]    Compiling merge_derive v0.1.0
[INFO] [stderr]    Compiling smart-default v0.6.0
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]    Compiling scroll v0.10.2
[INFO] [stderr]    Compiling merge v0.1.0
[INFO] [stderr]    Compiling goblin v0.2.3
[INFO] [stderr]    Compiling thiserror v1.0.31
[INFO] [stderr]    Compiling loopdev v0.4.0
[INFO] [stderr]    Compiling tracing v0.1.35
[INFO] [stderr]    Compiling structopt v0.3.26
[INFO] [stderr] error: failed to run custom build command for `loopdev v0.4.0`
[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-635ae35760257e9b/build-script-build` (exit status: 101)
[INFO] [stderr]   --- stderr
[INFO] [stderr] 
[INFO] [stderr]   thread 'main' (1953) panicked at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.37/src/fallback.rs:701:9:
[INFO] [stderr]   "enum_(unnamed_at_/usr/include/linux/loop_h_16_1)" is not a valid Ident
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x56941dd14bb2 - std::backtrace_rs::backtrace::libunwind::trace::h99ff5752a7301b61
[INFO] [stderr]                                  at /rustc/4987e9d4227139400384ab59296ffee3b0fb1183/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stderr]      1:     0x56941dd14bb2 - std::backtrace_rs::backtrace::trace_unsynchronized::h9703f67ee3d8bde4
[INFO] [stderr]                                  at /rustc/4987e9d4227139400384ab59296ffee3b0fb1183/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stderr]      2:     0x56941dd14bb2 - std::sys::backtrace::_print_fmt::h8519833aba8d197b
[INFO] [stderr]                                  at /rustc/4987e9d4227139400384ab59296ffee3b0fb1183/library/std/src/sys/backtrace.rs:66:9
[INFO] [stderr]      3:     0x56941dd14bb2 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h2212f3765287aa3c
[INFO] [stderr]                                  at /rustc/4987e9d4227139400384ab59296ffee3b0fb1183/library/std/src/sys/backtrace.rs:39:26
[INFO] [stderr]      4:     0x56941dd25e7f - core::fmt::rt::Argument::fmt::h3b42cc36ff36d45c
[INFO] [stderr]                                  at /rustc/4987e9d4227139400384ab59296ffee3b0fb1183/library/core/src/fmt/rt.rs:173:76
[INFO] [stderr]      5:     0x56941dd25e7f - core::fmt::write::he00b92b9582c1fe6
[INFO] [stderr]                                  at /rustc/4987e9d4227139400384ab59296ffee3b0fb1183/library/core/src/fmt/mod.rs:1468:25
[INFO] [stderr]      6:     0x56941dce7401 - std::io::default_write_fmt::h20b9b23e0b407dd4
[INFO] [stderr]                                  at /rustc/4987e9d4227139400384ab59296ffee3b0fb1183/library/std/src/io/mod.rs:639:11
[INFO] [stderr]      7:     0x56941dce7401 - std::io::Write::write_fmt::h4a31dcab881658aa
[INFO] [stderr]                                  at /rustc/4987e9d4227139400384ab59296ffee3b0fb1183/library/std/src/io/mod.rs:1954:13
[INFO] [stderr]      8:     0x56941dcf1e52 - std::sys::backtrace::BacktraceLock::print::h88b4e5cf8cc5573c
[INFO] [stderr]                                  at /rustc/4987e9d4227139400384ab59296ffee3b0fb1183/library/std/src/sys/backtrace.rs:42:9
[INFO] [stderr]      9:     0x56941dcf495f - std::panicking::default_hook::{{closure}}::h59b171bf4b799798
[INFO] [stderr]                                  at /rustc/4987e9d4227139400384ab59296ffee3b0fb1183/library/std/src/panicking.rs:301:27
[INFO] [stderr]     10:     0x56941dcf47b9 - std::panicking::default_hook::h518e81d9a9e2c2c5
[INFO] [stderr]                                  at /rustc/4987e9d4227139400384ab59296ffee3b0fb1183/library/std/src/panicking.rs:328:9
[INFO] [stderr]     11:     0x56941dcf5095 - std::panicking::panic_with_hook::h6c76fcfbe64ae67c
[INFO] [stderr]                                  at /rustc/4987e9d4227139400384ab59296ffee3b0fb1183/library/std/src/panicking.rs:834:13
[INFO] [stderr]     12:     0x56941dcf4e7a - std::panicking::panic_handler::{{closure}}::h2ff4617091b05450
[INFO] [stderr]                                  at /rustc/4987e9d4227139400384ab59296ffee3b0fb1183/library/std/src/panicking.rs:707:13
[INFO] [stderr]     13:     0x56941dcf1f99 - std::sys::backtrace::__rust_end_short_backtrace::he93810e6790d1c15
[INFO] [stderr]                                  at /rustc/4987e9d4227139400384ab59296ffee3b0fb1183/library/std/src/sys/backtrace.rs:174:18
[INFO] [stderr]     14:     0x56941dcdb88d - __rustc[552020a2b822d25f]::rust_begin_unwind
[INFO] [stderr]                                  at /rustc/4987e9d4227139400384ab59296ffee3b0fb1183/library/std/src/panicking.rs:698:5
[INFO] [stderr]     15:     0x56941dd2fd50 - core::panicking::panic_fmt::hd2d793968eae26aa
[INFO] [stderr]                                  at /rustc/4987e9d4227139400384ab59296ffee3b0fb1183/library/core/src/panicking.rs:78:14
[INFO] [stderr]     16:     0x56941dccb8bf - proc_macro2::fallback::validate_ident::h0acba0d80ab60f63
[INFO] [stderr]     17:     0x56941dccbaf1 - proc_macro2::fallback::Ident::_new::h7262437d3d140546
[INFO] [stderr]     18:     0x56941dccbaaf - proc_macro2::fallback::Ident::new::hc8ba1d4f1fc83d4c
[INFO] [stderr]     19:     0x56941dcca968 - proc_macro2::imp::Ident::new::h67a96fee1a1d1f0d
[INFO] [stderr]     20:     0x56941dcc07d8 - proc_macro2::Ident::new::h864541eeea7381a2
[INFO] [stderr]     21:     0x56941da27c9f - bindgen::ir::context::BindgenContext::rust_ident_raw::hbff4f4eb254ce254
[INFO] [stderr]     22:     0x56941da259d0 - bindgen::ir::context::BindgenContext::rust_ident::h93fc38a5870d1f5b
[INFO] [stderr]     23:     0x56941dafbf9e - <bindgen::ir::enum_ty::Enum as bindgen::codegen::CodeGenerator>::codegen::h85f4197cad66c512
[INFO] [stderr]     24:     0x56941daf8926 - <bindgen::ir::ty::Type as bindgen::codegen::CodeGenerator>::codegen::ha4f83f1253c66fc9
[INFO] [stderr]     25:     0x56941db12add - <bindgen::ir::item::Item as bindgen::codegen::CodeGenerator>::codegen::h2de265906c63efc0
[INFO] [stderr]     26:     0x56941da59ca5 - <bindgen::ir::module::Module as bindgen::codegen::CodeGenerator>::codegen::{{closure}}::h5f2c505ed051a258
[INFO] [stderr]     27:     0x56941da78bf5 - <bindgen::ir::module::Module as bindgen::codegen::CodeGenerator>::codegen::h22439180761f6cde
[INFO] [stderr]     28:     0x56941db12ac2 - <bindgen::ir::item::Item as bindgen::codegen::CodeGenerator>::codegen::h2de265906c63efc0
[INFO] [stderr]     29:     0x56941da66d28 - bindgen::codegen::codegen::{{closure}}::h699ed92150de31e7
[INFO] [stderr]     30:     0x56941da32468 - bindgen::ir::context::BindgenContext::gen::hec6461434dc10d01
[INFO] [stderr]     31:     0x56941da6663d - bindgen::codegen::codegen::h5a60650e26e86144
[INFO] [stderr]     32:     0x56941da0b336 - bindgen::Bindings::generate::hdc6ce2c178024f91
[INFO] [stderr]     33:     0x56941da082ef - bindgen::Builder::generate::hfd4ddefcec4c46b6
[INFO] [stderr]     34:     0x56941d9e8ae6 - build_script_build::main::hcda9ce720e2304d3
[INFO] [stderr]     35:     0x56941d9e95f3 - core::ops::function::FnOnce::call_once::h630bdbd455b39113
[INFO] [stderr]     36:     0x56941d9e9466 - std::sys::backtrace::__rust_begin_short_backtrace::hc56c4e1e6a89793f
[INFO] [stderr]     37:     0x56941d9e9449 - std::rt::lang_start::{{closure}}::h59b87c4139c46bc7
[INFO] [stderr]     38:     0x56941dce8e10 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h64f1c33f2a77ce68
[INFO] [stderr]                                  at /rustc/4987e9d4227139400384ab59296ffee3b0fb1183/library/core/src/ops/function.rs:287:21
[INFO] [stderr]     39:     0x56941dce8e10 - std::panicking::catch_unwind::do_call::h5854891e24f1d732
[INFO] [stderr]                                  at /rustc/4987e9d4227139400384ab59296ffee3b0fb1183/library/std/src/panicking.rs:590:40
[INFO] [stderr]     40:     0x56941dce8e10 - std::panicking::catch_unwind::h3c89ba6804b7ef45
[INFO] [stderr]                                  at /rustc/4987e9d4227139400384ab59296ffee3b0fb1183/library/std/src/panicking.rs:553:19
[INFO] [stderr]     41:     0x56941dce8e10 - std::panic::catch_unwind::hc239b1f0bd06c7e7
[INFO] [stderr]                                  at /rustc/4987e9d4227139400384ab59296ffee3b0fb1183/library/std/src/panic.rs:359:14
[INFO] [stderr]     42:     0x56941dce8e10 - std::rt::lang_start_internal::{{closure}}::ha9d8fb8253d749d7
[INFO] [stderr]                                  at /rustc/4987e9d4227139400384ab59296ffee3b0fb1183/library/std/src/rt.rs:175:24
[INFO] [stderr]     43:     0x56941dce8e10 - std::panicking::catch_unwind::do_call::h428a277c0848e71c
[INFO] [stderr]                                  at /rustc/4987e9d4227139400384ab59296ffee3b0fb1183/library/std/src/panicking.rs:590:40
[INFO] [stderr]     44:     0x56941dce8e10 - std::panicking::catch_unwind::hd0989b6642f7ad81
[INFO] [stderr]                                  at /rustc/4987e9d4227139400384ab59296ffee3b0fb1183/library/std/src/panicking.rs:553:19
[INFO] [stderr]     45:     0x56941dce8e10 - std::panic::catch_unwind::hff4afb10b723ad75
[INFO] [stderr]                                  at /rustc/4987e9d4227139400384ab59296ffee3b0fb1183/library/std/src/panic.rs:359:14
[INFO] [stderr]     46:     0x56941dce8e10 - std::rt::lang_start_internal::h5e6155dfabba704f
[INFO] [stderr]                                  at /rustc/4987e9d4227139400384ab59296ffee3b0fb1183/library/std/src/rt.rs:171:5
[INFO] [stderr]     47:     0x56941d9e9431 - std::rt::lang_start::heef91dec664f605c
[INFO] [stderr]     48:     0x56941d9ea775 - main
[INFO] [stderr]     49:     0x7e9a2d1ea1ca - <unknown>
[INFO] [stderr]     50:     0x7e9a2d1ea28b - __libc_start_main
[INFO] [stderr]     51:     0x56941d9e8875 - _start
[INFO] [stderr]     52:                0x0 - <unknown>
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "856b3f5cf7213b01d71b291782eada6b1ec2c9b1275bc8b8a408ce9329d001de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "856b3f5cf7213b01d71b291782eada6b1ec2c9b1275bc8b8a408ce9329d001de", kill_on_drop: false }`
[INFO] [stdout] 856b3f5cf7213b01d71b291782eada6b1ec2c9b1275bc8b8a408ce9329d001de