[INFO] fetching crate rtic 2.1.2...
[INFO] checking rtic-2.1.2 against try#0c7fed2b7584d310ca8221267fa1b3bec4df427f for pr-133502-4
[INFO] extracting crate rtic 2.1.2 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate rtic 2.1.2 on toolchain 0c7fed2b7584d310ca8221267fa1b3bec4df427f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0c7fed2b7584d310ca8221267fa1b3bec4df427f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-2-tc2/source/.cargo/config.toml
[INFO] started tweaking crates.io crate rtic 2.1.2
[INFO] removed 0 missing examples
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate rtic 2.1.2
[INFO] tweaked toml for crates.io crate rtic 2.1.2 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate crates.io crate rtic 2.1.2 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" "+0c7fed2b7584d310ca8221267fa1b3bec4df427f" "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-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+0c7fed2b7584d310ca8221267fa1b3bec4df427f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 773dd09c172911ad60d7fbb5865069852a80949269186634ce741579bdf6734d
[INFO] running `Command { std: "docker" "start" "-a" "773dd09c172911ad60d7fbb5865069852a80949269186634ce741579bdf6734d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "773dd09c172911ad60d7fbb5865069852a80949269186634ce741579bdf6734d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "773dd09c172911ad60d7fbb5865069852a80949269186634ce741579bdf6734d", kill_on_drop: false }`
[INFO] [stdout] 773dd09c172911ad60d7fbb5865069852a80949269186634ce741579bdf6734d
[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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+0c7fed2b7584d310ca8221267fa1b3bec4df427f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7142fba778b53851550f76df05aae85c2cfbda6885604e9378df22ed9a2f27d9
[INFO] running `Command { std: "docker" "start" "-a" "7142fba778b53851550f76df05aae85c2cfbda6885604e9378df22ed9a2f27d9", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.78
[INFO] [stderr]    Compiling unicode-ident v1.0.11
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling cortex-m v0.7.7
[INFO] [stderr]     Checking nb v1.1.0
[INFO] [stderr]     Checking vcell v0.1.3
[INFO] [stderr]    Compiling futures-core v0.3.28
[INFO] [stderr]    Compiling serde v1.0.175
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking nb v0.1.3
[INFO] [stderr]     Checking volatile-register v0.2.1
[INFO] [stderr]    Compiling futures-task v0.3.28
[INFO] [stderr]    Compiling cortex-m-rt v0.7.3
[INFO] [stderr]     Checking embedded-hal v0.2.7
[INFO] [stderr]     Checking bitfield v0.13.2
[INFO] [stderr]    Compiling hashbrown v0.14.0
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling futures-channel v0.3.28
[INFO] [stderr]    Compiling serde_json v1.0.103
[INFO] [stderr]    Compiling equivalent v1.0.1
[INFO] [stderr]     Checking futures-sink v0.3.28
[INFO] [stderr]    Compiling portable-atomic v1.6.0
[INFO] [stderr]    Compiling futures-util v0.3.28
[INFO] [stderr]    Compiling cortex-m-semihosting v0.5.0
[INFO] [stderr]     Checking pin-project-lite v0.2.10
[INFO] [stderr]    Compiling trybuild v1.0.82
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling lm3s6965 v0.2.0
[INFO] [stderr]     Checking itoa v1.0.9
[INFO] [stderr]     Checking ryu v1.0.15
[INFO] [stderr]    Compiling bare-metal v0.2.5
[INFO] [stderr]    Compiling rtic v2.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking glob v0.3.1
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr] error: failed to run custom build command for `rtic v2.1.2 (/opt/rustwide/workdir)`
[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/rtic-52831bf0d608bb43/build-script-build` (exit status: 101)
[INFO] [stderr]   --- stderr
[INFO] [stderr] 
[INFO] [stderr]   thread 'main' panicked at build.rs:18:34:
[INFO] [stderr]   No backend feature selected.
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x641b1fbbebc2 - std::backtrace_rs::backtrace::libunwind::trace::h7703129c079f804b
[INFO] [stderr]                                  at /rustc/0c7fed2b7584d310ca8221267fa1b3bec4df427f/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stderr]      1:     0x641b1fbbebc2 - std::backtrace_rs::backtrace::trace_unsynchronized::hc6303c12986be223
[INFO] [stderr]                                  at /rustc/0c7fed2b7584d310ca8221267fa1b3bec4df427f/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stderr]      2:     0x641b1fbbebc2 - std::sys::backtrace::_print_fmt::h4938eee713b356ec
[INFO] [stderr]                                  at /rustc/0c7fed2b7584d310ca8221267fa1b3bec4df427f/library/std/src/sys/backtrace.rs:66:9
[INFO] [stderr]      3:     0x641b1fbbebc2 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h7c3382f1d302af34
[INFO] [stderr]                                  at /rustc/0c7fed2b7584d310ca8221267fa1b3bec4df427f/library/std/src/sys/backtrace.rs:39:26
[INFO] [stderr]      4:     0x641b1fbda683 - core::fmt::rt::Argument::fmt::h6b07b3258ffc61ce
[INFO] [stderr]                                  at /rustc/0c7fed2b7584d310ca8221267fa1b3bec4df427f/library/core/src/fmt/rt.rs:179:76
[INFO] [stderr]      5:     0x641b1fbda683 - core::fmt::write::h859070812c8448f1
[INFO] [stderr]                                  at /rustc/0c7fed2b7584d310ca8221267fa1b3bec4df427f/library/core/src/fmt/mod.rs:1481:25
[INFO] [stderr]      6:     0x641b1fbbc893 - std::io::default_write_fmt::h20b04bf5505a214e
[INFO] [stderr]                                  at /rustc/0c7fed2b7584d310ca8221267fa1b3bec4df427f/library/std/src/io/mod.rs:639:11
[INFO] [stderr]      7:     0x641b1fbbc893 - std::io::Write::write_fmt::hc3136429afe81f9c
[INFO] [stderr]                                  at /rustc/0c7fed2b7584d310ca8221267fa1b3bec4df427f/library/std/src/io/mod.rs:1914:13
[INFO] [stderr]      8:     0x641b1fbbea12 - std::sys::backtrace::BacktraceLock::print::hd2c63eb4bc199280
[INFO] [stderr]                                  at /rustc/0c7fed2b7584d310ca8221267fa1b3bec4df427f/library/std/src/sys/backtrace.rs:42:9
[INFO] [stderr]      9:     0x641b1fbbfa82 - std::panicking::default_hook::{{closure}}::h6c9757fa60294692
[INFO] [stderr]                                  at /rustc/0c7fed2b7584d310ca8221267fa1b3bec4df427f/library/std/src/panicking.rs:300:22
[INFO] [stderr]     10:     0x641b1fbbf885 - std::panicking::default_hook::hd86b14cbd8a668d7
[INFO] [stderr]                                  at /rustc/0c7fed2b7584d310ca8221267fa1b3bec4df427f/library/std/src/panicking.rs:327:9
[INFO] [stderr]     11:     0x641b1fbc0352 - std::panicking::rust_panic_with_hook::h3d9586e8b3260c13
[INFO] [stderr]                                  at /rustc/0c7fed2b7584d310ca8221267fa1b3bec4df427f/library/std/src/panicking.rs:833:13
[INFO] [stderr]     12:     0x641b1fbc01ea - std::panicking::begin_panic_handler::{{closure}}::h7fe85e40ae2344e1
[INFO] [stderr]                                  at /rustc/0c7fed2b7584d310ca8221267fa1b3bec4df427f/library/std/src/panicking.rs:706:13
[INFO] [stderr]     13:     0x641b1fbbf0b9 - std::sys::backtrace::__rust_end_short_backtrace::h82a73d3880c3be93
[INFO] [stderr]                                  at /rustc/0c7fed2b7584d310ca8221267fa1b3bec4df427f/library/std/src/sys/backtrace.rs:168:18
[INFO] [stderr]     14:     0x641b1fbbfe7d - __rustc[1b82e7b26ae17e9d]::rust_begin_unwind
[INFO] [stderr]                                  at /rustc/0c7fed2b7584d310ca8221267fa1b3bec4df427f/library/std/src/panicking.rs:697:5
[INFO] [stderr]     15:     0x641b1fbd9b50 - core::panicking::panic_fmt::ha57a849d6d926ba8
[INFO] [stderr]                                  at /rustc/0c7fed2b7584d310ca8221267fa1b3bec4df427f/library/core/src/panicking.rs:75:14
[INFO] [stderr]     16:     0x641b1fbd9b2b - core::panicking::panic_display::h1420bdfd187549f8
[INFO] [stderr]                                  at /rustc/0c7fed2b7584d310ca8221267fa1b3bec4df427f/library/core/src/panicking.rs:261:5
[INFO] [stderr]     17:     0x641b1fbd9b2b - core::option::expect_failed::h3c75560ff311fdb3
[INFO] [stderr]                                  at /rustc/0c7fed2b7584d310ca8221267fa1b3bec4df427f/library/core/src/option.rs:2024:5
[INFO] [stderr]     18:     0x641b1fb9c7c1 - core::option::Option<T>::expect::hf52dc7016dccc99d
[INFO] [stderr]     19:     0x641b1fb9e109 - build_script_build::main::h471505945e3fa0bd
[INFO] [stderr]     20:     0x641b1fb9b3f3 - core::ops::function::FnOnce::call_once::h07c1594d6487eea4
[INFO] [stderr]     21:     0x641b1fb9b0e6 - std::sys::backtrace::__rust_begin_short_backtrace::hf121c51ff40cdb58
[INFO] [stderr]     22:     0x641b1fb9b0c9 - std::rt::lang_start::{{closure}}::h156f3182d77d1983
[INFO] [stderr]     23:     0x641b1fbb9690 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::hdeb6474dbebc713e
[INFO] [stderr]                                  at /rustc/0c7fed2b7584d310ca8221267fa1b3bec4df427f/library/core/src/ops/function.rs:284:13
[INFO] [stderr]     24:     0x641b1fbb9690 - std::panicking::try::do_call::h336cbab7a280cf26
[INFO] [stderr]                                  at /rustc/0c7fed2b7584d310ca8221267fa1b3bec4df427f/library/std/src/panicking.rs:589:40
[INFO] [stderr]     25:     0x641b1fbb9690 - std::panicking::try::hd0b359bbd6f70fb8
[INFO] [stderr]                                  at /rustc/0c7fed2b7584d310ca8221267fa1b3bec4df427f/library/std/src/panicking.rs:552:19
[INFO] [stderr]     26:     0x641b1fbb9690 - std::panic::catch_unwind::h1da951be80695fdd
[INFO] [stderr]                                  at /rustc/0c7fed2b7584d310ca8221267fa1b3bec4df427f/library/std/src/panic.rs:359:14
[INFO] [stderr]     27:     0x641b1fbb9690 - std::rt::lang_start_internal::{{closure}}::ha6abec5c175090b7
[INFO] [stderr]                                  at /rustc/0c7fed2b7584d310ca8221267fa1b3bec4df427f/library/std/src/rt.rs:168:24
[INFO] [stderr]     28:     0x641b1fbb9690 - std::panicking::try::do_call::h398944567bf8166e
[INFO] [stderr]                                  at /rustc/0c7fed2b7584d310ca8221267fa1b3bec4df427f/library/std/src/panicking.rs:589:40
[INFO] [stderr]     29:     0x641b1fbb9690 - std::panicking::try::h516c2a7e41135c9e
[INFO] [stderr]                                  at /rustc/0c7fed2b7584d310ca8221267fa1b3bec4df427f/library/std/src/panicking.rs:552:19
[INFO] [stderr]     30:     0x641b1fbb9690 - std::panic::catch_unwind::hc2a92049712e61b3
[INFO] [stderr]                                  at /rustc/0c7fed2b7584d310ca8221267fa1b3bec4df427f/library/std/src/panic.rs:359:14
[INFO] [stderr]     31:     0x641b1fbb9690 - std::rt::lang_start_internal::h5b322768594627b9
[INFO] [stderr]                                  at /rustc/0c7fed2b7584d310ca8221267fa1b3bec4df427f/library/std/src/rt.rs:164:5
[INFO] [stderr]     32:     0x641b1fb9b0b1 - std::rt::lang_start::h991bf84db386c698
[INFO] [stderr]     33:     0x641b1fb9e665 - main
[INFO] [stderr]     34:     0x7ff26c9f31ca - <unknown>
[INFO] [stderr]     35:     0x7ff26c9f328b - __libc_start_main
[INFO] [stderr]     36:     0x641b1fb9a9b5 - _start
[INFO] [stderr]     37:                0x0 - <unknown>
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "7142fba778b53851550f76df05aae85c2cfbda6885604e9378df22ed9a2f27d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7142fba778b53851550f76df05aae85c2cfbda6885604e9378df22ed9a2f27d9", kill_on_drop: false }`
[INFO] [stdout] 7142fba778b53851550f76df05aae85c2cfbda6885604e9378df22ed9a2f27d9