[INFO] fetching crate tweakster 0.0.3...
[INFO] building tweakster-0.0.3 against try#d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6 for pr-146237-1
[INFO] extracting crate tweakster 0.0.3 into /workspace/builds/worker-2-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-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate tweakster 0.0.3 on toolchain d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "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" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f1d475ef9f6c14861e6be5846d253ab47a9f3ed7f77f7db8d6a325166606012d
[INFO] running `Command { std: "docker" "start" "-a" "f1d475ef9f6c14861e6be5846d253ab47a9f3ed7f77f7db8d6a325166606012d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f1d475ef9f6c14861e6be5846d253ab47a9f3ed7f77f7db8d6a325166606012d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f1d475ef9f6c14861e6be5846d253ab47a9f3ed7f77f7db8d6a325166606012d", kill_on_drop: false }`
[INFO] [stdout] f1d475ef9f6c14861e6be5846d253ab47a9f3ed7f77f7db8d6a325166606012d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 831edc51fb0f177d55cc78d1a124664c3e71087a2c4d3d07fab55a4ae4b380d1
[INFO] running `Command { std: "docker" "start" "-a" "831edc51fb0f177d55cc78d1a124664c3e71087a2c4d3d07fab55a4ae4b380d1", kill_on_drop: false }`
[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 bindgen v0.59.2
[INFO] [stderr]    Compiling regex-syntax v0.6.27
[INFO] [stderr]    Compiling lazycell v1.3.0
[INFO] [stderr]    Compiling peeking_take_while v0.1.2
[INFO] [stderr]    Compiling rustc-hash v1.1.0
[INFO] [stderr]    Compiling libloading v0.7.3
[INFO] [stderr]    Compiling shlex v1.1.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling serde_derive v1.0.136
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling unicode-segmentation v1.9.0
[INFO] [stderr]    Compiling unicode-width v0.1.9
[INFO] [stderr]    Compiling once_cell v1.13.0
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]    Compiling textwrap v0.11.0
[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 tracing-core v0.1.28
[INFO] [stderr]    Compiling clang-sys v1.3.3
[INFO] [stderr]    Compiling nom v7.1.1
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling errno v0.2.8
[INFO] [stderr]    Compiling regex v1.6.0
[INFO] [stderr]    Compiling clap v2.34.0
[INFO] [stderr]    Compiling cexpr v0.6.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling thiserror-impl v1.0.31
[INFO] [stderr]    Compiling tracing-attributes v0.1.22
[INFO] [stderr]    Compiling scroll_derive v0.10.5
[INFO] [stderr]    Compiling smart-default v0.6.0
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]    Compiling merge_derive v0.1.0
[INFO] [stderr]    Compiling merge v0.1.0
[INFO] [stderr]    Compiling scroll v0.10.2
[INFO] [stderr]    Compiling goblin v0.2.3
[INFO] [stderr]    Compiling structopt v0.3.26
[INFO] [stderr]    Compiling thiserror v1.0.31
[INFO] [stderr]    Compiling tracing v0.1.35
[INFO] [stderr]    Compiling loopdev v0.4.0
[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' (1395) 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:     0x625e7a2a8a32 - std::backtrace_rs::backtrace::libunwind::trace::hb47480f78a1ce3ca
[INFO] [stderr]                                  at /rustc/d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stderr]      1:     0x625e7a2a8a32 - std::backtrace_rs::backtrace::trace_unsynchronized::hc1656d2da6a98cd5
[INFO] [stderr]                                  at /rustc/d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stderr]      2:     0x625e7a2a8a32 - std::sys::backtrace::_print_fmt::h19dc0f5ca3f1c927
[INFO] [stderr]                                  at /rustc/d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6/library/std/src/sys/backtrace.rs:66:9
[INFO] [stderr]      3:     0x625e7a2a8a32 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h71e2dbb21440d8d7
[INFO] [stderr]                                  at /rustc/d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6/library/std/src/sys/backtrace.rs:39:26
[INFO] [stderr]      4:     0x625e7a2b9d0f - core::fmt::rt::Argument::fmt::h5bcabd5a3c1d10f7
[INFO] [stderr]                                  at /rustc/d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6/library/core/src/fmt/rt.rs:173:76
[INFO] [stderr]      5:     0x625e7a2b9d0f - core::fmt::write::ha34f2b5c70e30f63
[INFO] [stderr]                                  at /rustc/d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6/library/core/src/fmt/mod.rs:1468:25
[INFO] [stderr]      6:     0x625e7a27b4b1 - std::io::default_write_fmt::h573facd83e7bee80
[INFO] [stderr]                                  at /rustc/d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6/library/std/src/io/mod.rs:639:11
[INFO] [stderr]      7:     0x625e7a27b4b1 - std::io::Write::write_fmt::h76264e5b71fd6d13
[INFO] [stderr]                                  at /rustc/d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6/library/std/src/io/mod.rs:1954:13
[INFO] [stderr]      8:     0x625e7a285e72 - std::sys::backtrace::BacktraceLock::print::hb3aae3980c2c9bd5
[INFO] [stderr]                                  at /rustc/d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6/library/std/src/sys/backtrace.rs:42:9
[INFO] [stderr]      9:     0x625e7a2889af - std::panicking::default_hook::{{closure}}::h1b7baa88a148d351
[INFO] [stderr]                                  at /rustc/d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6/library/std/src/panicking.rs:301:27
[INFO] [stderr]     10:     0x625e7a288809 - std::panicking::default_hook::hbc5e86c06039547d
[INFO] [stderr]                                  at /rustc/d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6/library/std/src/panicking.rs:328:9
[INFO] [stderr]     11:     0x625e7a2890e5 - std::panicking::panic_with_hook::ha6d2c09d64f936dd
[INFO] [stderr]                                  at /rustc/d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6/library/std/src/panicking.rs:834:13
[INFO] [stderr]     12:     0x625e7a288eca - std::panicking::panic_handler::{{closure}}::h455c9d131d722636
[INFO] [stderr]                                  at /rustc/d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6/library/std/src/panicking.rs:707:13
[INFO] [stderr]     13:     0x625e7a285fb9 - std::sys::backtrace::__rust_end_short_backtrace::hd6ef955384ebd085
[INFO] [stderr]                                  at /rustc/d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6/library/std/src/sys/backtrace.rs:174:18
[INFO] [stderr]     14:     0x625e7a26f64d - __rustc[f338935add60802b]::rust_begin_unwind
[INFO] [stderr]                                  at /rustc/d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6/library/std/src/panicking.rs:698:5
[INFO] [stderr]     15:     0x625e7a2c3bb0 - core::panicking::panic_fmt::hb8d4a4959b79599f
[INFO] [stderr]                                  at /rustc/d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6/library/core/src/panicking.rs:75:14
[INFO] [stderr]     16:     0x625e7a25f59f - proc_macro2::fallback::validate_ident::hee3865d065056f79
[INFO] [stderr]     17:     0x625e7a25f7d1 - proc_macro2::fallback::Ident::_new::h805fbe41f2459bc9
[INFO] [stderr]     18:     0x625e7a25f78f - proc_macro2::fallback::Ident::new::hb4471f50e30dbbe0
[INFO] [stderr]     19:     0x625e7a25e628 - proc_macro2::imp::Ident::new::h88382185f7e2373e
[INFO] [stderr]     20:     0x625e7a2541a8 - proc_macro2::Ident::new::h05f3570a830ae734
[INFO] [stderr]     21:     0x625e79fff22f - bindgen::ir::context::BindgenContext::rust_ident_raw::he9133362edc1ded0
[INFO] [stderr]     22:     0x625e79ffcfe0 - bindgen::ir::context::BindgenContext::rust_ident::hf21569dbdcda8a57
[INFO] [stderr]     23:     0x625e7a0990fe - <bindgen::ir::enum_ty::Enum as bindgen::codegen::CodeGenerator>::codegen::h1c01ba00e6b82283
[INFO] [stderr]     24:     0x625e7a091bf6 - <bindgen::ir::ty::Type as bindgen::codegen::CodeGenerator>::codegen::h2ae03e331b633131
[INFO] [stderr]     25:     0x625e79faa80d - <bindgen::ir::item::Item as bindgen::codegen::CodeGenerator>::codegen::h206051a69599a683
[INFO] [stderr]     26:     0x625e79f92e35 - <bindgen::ir::module::Module as bindgen::codegen::CodeGenerator>::codegen::{{closure}}::h2b8b10d4806957aa
[INFO] [stderr]     27:     0x625e79fd7bb5 - <bindgen::ir::module::Module as bindgen::codegen::CodeGenerator>::codegen::hed3872edbe6633df
[INFO] [stderr]     28:     0x625e79faa7f2 - <bindgen::ir::item::Item as bindgen::codegen::CodeGenerator>::codegen::h206051a69599a683
[INFO] [stderr]     29:     0x625e79fa203e - bindgen::codegen::codegen::{{closure}}::h1ac011cfe015b475
[INFO] [stderr]     30:     0x625e7a009958 - bindgen::ir::context::BindgenContext::gen::he441c8ee72949340
[INFO] [stderr]     31:     0x625e79fa194d - bindgen::codegen::codegen::hff42190ab0a3bb93
[INFO] [stderr]     32:     0x625e7a05780e - bindgen::Bindings::generate::hb9da2ec226333549
[INFO] [stderr]     33:     0x625e7a0547cb - bindgen::Builder::generate::hcb67cecdbb7d7f8c
[INFO] [stderr]     34:     0x625e79f77626 - build_script_build::main::hb11a49e1fdb4adcf
[INFO] [stderr]     35:     0x625e79f78143 - core::ops::function::FnOnce::call_once::hdc75e4acb3be23d2
[INFO] [stderr]     36:     0x625e79f77fb6 - std::sys::backtrace::__rust_begin_short_backtrace::hdd9693910b7dd187
[INFO] [stderr]     37:     0x625e79f77f99 - std::rt::lang_start::{{closure}}::h744ef0acc7fdcf8e
[INFO] [stderr]     38:     0x625e7a27cec0 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h6775bd355fba6242
[INFO] [stderr]                                  at /rustc/d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6/library/core/src/ops/function.rs:290:21
[INFO] [stderr]     39:     0x625e7a27cec0 - std::panicking::catch_unwind::do_call::hd380709a4299b9fc
[INFO] [stderr]                                  at /rustc/d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6/library/std/src/panicking.rs:590:40
[INFO] [stderr]     40:     0x625e7a27cec0 - std::panicking::catch_unwind::h518887d20d286a22
[INFO] [stderr]                                  at /rustc/d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6/library/std/src/panicking.rs:553:19
[INFO] [stderr]     41:     0x625e7a27cec0 - std::panic::catch_unwind::h2976988d58581e5d
[INFO] [stderr]                                  at /rustc/d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6/library/std/src/panic.rs:359:14
[INFO] [stderr]     42:     0x625e7a27cec0 - std::rt::lang_start_internal::{{closure}}::h1b4b9756e08c6661
[INFO] [stderr]                                  at /rustc/d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6/library/std/src/rt.rs:175:24
[INFO] [stderr]     43:     0x625e7a27cec0 - std::panicking::catch_unwind::do_call::hcca0ca64d8ef299f
[INFO] [stderr]                                  at /rustc/d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6/library/std/src/panicking.rs:590:40
[INFO] [stderr]     44:     0x625e7a27cec0 - std::panicking::catch_unwind::h685f750dcd8c8c5d
[INFO] [stderr]                                  at /rustc/d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6/library/std/src/panicking.rs:553:19
[INFO] [stderr]     45:     0x625e7a27cec0 - std::panic::catch_unwind::hcb6c05508142789b
[INFO] [stderr]                                  at /rustc/d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6/library/std/src/panic.rs:359:14
[INFO] [stderr]     46:     0x625e7a27cec0 - std::rt::lang_start_internal::h2ade37a099a7616e
[INFO] [stderr]                                  at /rustc/d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6/library/std/src/rt.rs:171:5
[INFO] [stderr]     47:     0x625e79f77f81 - std::rt::lang_start::h4a8a81253a5eff7c
[INFO] [stderr]     48:     0x625e79f792b5 - main
[INFO] [stderr]     49:     0x6ffc8c3571ca - <unknown>
[INFO] [stderr]     50:     0x6ffc8c35728b - __libc_start_main
[INFO] [stderr]     51:     0x625e79f773b5 - _start
[INFO] [stderr]     52:                0x0 - <unknown>
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "831edc51fb0f177d55cc78d1a124664c3e71087a2c4d3d07fab55a4ae4b380d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "831edc51fb0f177d55cc78d1a124664c3e71087a2c4d3d07fab55a4ae4b380d1", kill_on_drop: false }`
[INFO] [stdout] 831edc51fb0f177d55cc78d1a124664c3e71087a2c4d3d07fab55a4ae4b380d1