[INFO] fetching crate rftrace 0.3.2...
[INFO] testing rftrace-0.3.2 against 1.99.0-beta.8+cargoflags=--release for beta-release-1.100-2
[INFO] extracting crate rftrace 0.3.2 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate rftrace 0.3.2
[INFO] finished tweaking crates.io crate rftrace 0.3.2
[INFO] tweaked toml for crates.io crate rftrace 0.3.2 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate rftrace 0.3.2 on toolchain 1.99.0-beta.8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.99.0-beta.8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate rftrace 0.3.2 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" "+1.99.0-beta.8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded llvm-tools v0.1.1
[INFO] [stderr]   Downloaded home v0.5.11
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 45ebcccffbc65058cf4ae4edf7afd34d73af29d78895991369d03483293d069e
[INFO] running `Command { std: "docker" "start" "45ebcccffbc65058cf4ae4edf7afd34d73af29d78895991369d03483293d069e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "45ebcccffbc65058cf4ae4edf7afd34d73af29d78895991369d03483293d069e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "45ebcccffbc65058cf4ae4edf7afd34d73af29d78895991369d03483293d069e" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "45ebcccffbc65058cf4ae4edf7afd34d73af29d78895991369d03483293d069e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "45ebcccffbc65058cf4ae4edf7afd34d73af29d78895991369d03483293d069e" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "build" "--frozen" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling llvm-tools v0.1.1
[INFO] [stderr]    Compiling home v0.5.11
[INFO] [stderr]    Compiling rftrace v0.3.2 (/opt/rustwide/workdir)
[INFO] [stderr] error: failed to run custom build command for `rftrace v0.3.2 (/opt/rustwide/workdir)`
[INFO] [stderr] note: To improve backtraces for build dependencies, set the CARGO_PROFILE_RELEASE_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/release/build/rftrace-13443aa3de5f0ead/build-script-build` (exit status: 101)
[INFO] [stderr]   --- stdout
[INFO] [stderr]   Building Backend!
[INFO] [stderr]   cargo::rerun-if-changed=src/thread_local.c
[INFO] [stderr]   OUT_DIR = Some(/opt/rustwide/target/release/build/rftrace-9345866a58a89265/out)
[INFO] [stderr]   OPT_LEVEL = Some(3)
[INFO] [stderr]   TARGET = Some(x86_64-unknown-linux-gnu)
[INFO] [stderr]   HOST = Some(x86_64-unknown-linux-gnu)
[INFO] [stderr]   cargo:rerun-if-env-changed=CC_x86_64-unknown-linux-gnu
[INFO] [stderr]   CC_x86_64-unknown-linux-gnu = None
[INFO] [stderr]   cargo:rerun-if-env-changed=CC_x86_64_unknown_linux_gnu
[INFO] [stderr]   CC_x86_64_unknown_linux_gnu = None
[INFO] [stderr]   cargo:rerun-if-env-changed=HOST_CC
[INFO] [stderr]   HOST_CC = None
[INFO] [stderr]   cargo:rerun-if-env-changed=CC
[INFO] [stderr]   CC = None
[INFO] [stderr]   cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
[INFO] [stderr]   RUSTC_WRAPPER = None
[INFO] [stderr]   cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
[INFO] [stderr]   CRATE_CC_NO_DEFAULTS = None
[INFO] [stderr]   DEBUG = Some(false)
[INFO] [stderr]   CARGO_CFG_TARGET_FEATURE = Some(fxsr,sse,sse2)
[INFO] [stderr]   cargo:rerun-if-env-changed=CFLAGS
[INFO] [stderr]   CFLAGS = None
[INFO] [stderr]   cargo:rerun-if-env-changed=HOST_CFLAGS
[INFO] [stderr]   HOST_CFLAGS = None
[INFO] [stderr]   cargo:rerun-if-env-changed=CFLAGS_x86_64_unknown_linux_gnu
[INFO] [stderr]   CFLAGS_x86_64_unknown_linux_gnu = None
[INFO] [stderr]   cargo:rerun-if-env-changed=CFLAGS_x86_64-unknown-linux-gnu
[INFO] [stderr]   CFLAGS_x86_64-unknown-linux-gnu = None
[INFO] [stderr]   CARGO_ENCODED_RUSTFLAGS = Some(--cap-lints=warn)
[INFO] [stderr]   cargo:rerun-if-env-changed=AR_x86_64-unknown-linux-gnu
[INFO] [stderr]   AR_x86_64-unknown-linux-gnu = None
[INFO] [stderr]   cargo:rerun-if-env-changed=AR_x86_64_unknown_linux_gnu
[INFO] [stderr]   AR_x86_64_unknown_linux_gnu = None
[INFO] [stderr]   cargo:rerun-if-env-changed=HOST_AR
[INFO] [stderr]   HOST_AR = None
[INFO] [stderr]   cargo:rerun-if-env-changed=AR
[INFO] [stderr]   AR = None
[INFO] [stderr]   cargo:rerun-if-env-changed=ARFLAGS
[INFO] [stderr]   ARFLAGS = None
[INFO] [stderr]   cargo:rerun-if-env-changed=HOST_ARFLAGS
[INFO] [stderr]   HOST_ARFLAGS = None
[INFO] [stderr]   cargo:rerun-if-env-changed=ARFLAGS_x86_64_unknown_linux_gnu
[INFO] [stderr]   ARFLAGS_x86_64_unknown_linux_gnu = None
[INFO] [stderr]   cargo:rerun-if-env-changed=ARFLAGS_x86_64-unknown-linux-gnu
[INFO] [stderr]   ARFLAGS_x86_64-unknown-linux-gnu = None
[INFO] [stderr]   cargo:rustc-link-lib=static=thread_local
[INFO] [stderr]   cargo:rustc-link-search=native=/opt/rustwide/target/release/build/rftrace-9345866a58a89265/out
[INFO] [stderr]   Starting sub-cargo
[INFO] [stderr] 
[INFO] [stderr]   --- stderr
[INFO] [stderr]      Compiling shlex v1.3.0
[INFO] [stderr]      Compiling llvm-tools v0.1.1
[INFO] [stderr]      Compiling home v0.5.11
[INFO] [stderr]      Compiling cc v1.2.32
[INFO] [stderr]      Compiling rftrace v0.3.2 (/opt/rustwide/workdir)
[INFO] [stderr]   error[E0463]: can't find crate for `core`
[INFO] [stderr]     |
[INFO] [stderr]     = note: the `x86_64-unknown-none` target may not be installed
[INFO] [stderr]     = help: consider downloading the target with `rustup target add x86_64-unknown-none`
[INFO] [stderr] 
[INFO] [stderr]   For more information about this error, try `rustc --explain E0463`.
[INFO] [stderr]   error: could not compile `rftrace` (lib) due to 1 previous error
[INFO] [stderr] 
[INFO] [stderr]   thread 'main' (86) panicked at build.rs:68:5:
[INFO] [stderr]   Unable to build tracer's static lib!
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x6296061ca571 - <<std[70759c8f55707aa4]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[df12db4294e9bfd3]::fmt::Display>::fmt
[INFO] [stderr]      1:     0x6296061deeba - core[df12db4294e9bfd3]::fmt::write
[INFO] [stderr]      2:     0x6296061d02ac - <std[70759c8f55707aa4]::sys::stdio::unix::Stderr as core[df12db4294e9bfd3]::io::write::Write>::write_fmt
[INFO] [stderr]      3:     0x6296061a82a6 - std[70759c8f55707aa4]::panicking::default_hook::{closure#0}
[INFO] [stderr]      4:     0x6296061c48a1 - std[70759c8f55707aa4]::panicking::default_hook
[INFO] [stderr]      5:     0x6296061c4a5b - std[70759c8f55707aa4]::panicking::panic_with_hook
[INFO] [stderr]      6:     0x6296061a782c - std[70759c8f55707aa4]::panicking::begin_panic::<&str>::{closure#0}
[INFO] [stderr]      7:     0x6296061a0eb9 - std[70759c8f55707aa4]::sys::backtrace::__rust_end_short_backtrace::<std[70759c8f55707aa4]::panicking::begin_panic<&str>::{closure#0}, !>
[INFO] [stderr]      8:     0x62960619e03b - std[70759c8f55707aa4]::panicking::begin_panic::<&str>
[INFO] [stderr]      9:     0x629606125e0a - build_script_build[84f1d4c8cf031495]::build_backend
[INFO] [stderr]     10:     0x629606127091 - build_script_build[84f1d4c8cf031495]::main
[INFO] [stderr]     11:     0x62960612b313 - <fn() as core[df12db4294e9bfd3]::ops::function::FnOnce<()>>::call_once
[INFO] [stderr]     12:     0x6296061240e6 - std[70759c8f55707aa4]::sys::backtrace::__rust_begin_short_backtrace::<fn(), ()>
[INFO] [stderr]     13:     0x629606124b29 - std[70759c8f55707aa4]::rt::lang_start::<()>::{closure#0}
[INFO] [stderr]     14:     0x6296061c3939 - std[70759c8f55707aa4]::rt::lang_start_internal
[INFO] [stderr]     15:     0x629606123f11 - std[70759c8f55707aa4]::rt::lang_start::<()>
[INFO] [stderr]     16:     0x62960612b415 - main
[INFO] [stderr]     17:     0x7107b3f1c601 - <unknown>
[INFO] [stderr]     18:     0x7107b3f1c718 - __libc_start_main
[INFO] [stderr]     19:     0x629606122745 - _start
[INFO] [stderr]     20:                0x0 - <unknown>
[INFO] running `Command { std: "docker" "inspect" "45ebcccffbc65058cf4ae4edf7afd34d73af29d78895991369d03483293d069e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "45ebcccffbc65058cf4ae4edf7afd34d73af29d78895991369d03483293d069e", kill_on_drop: false }`
[INFO] [stdout] 45ebcccffbc65058cf4ae4edf7afd34d73af29d78895991369d03483293d069e
