[INFO] fetching crate steganer 1.1.0-post4...
[INFO] testing steganer-1.1.0-post4 against 1.100.0-beta.1+cargoflags=--release for beta-release-1.100-2
[INFO] extracting crate steganer 1.1.0-post4 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate steganer 1.1.0-post4
[INFO] finished tweaking crates.io crate steganer 1.1.0-post4
[INFO] tweaked toml for crates.io crate steganer 1.1.0-post4 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate steganer 1.1.0-post4 on toolchain 1.100.0-beta.1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate steganer 1.1.0-post4 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" "+1.100.0-beta.1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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] 0eb5fa936eca872d96717926ca803e59b2ae1a420ec1bbda51ac1aeb3f564607
[INFO] running `Command { std: "docker" "start" "0eb5fa936eca872d96717926ca803e59b2ae1a420ec1bbda51ac1aeb3f564607", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0eb5fa936eca872d96717926ca803e59b2ae1a420ec1bbda51ac1aeb3f564607", 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" "0eb5fa936eca872d96717926ca803e59b2ae1a420ec1bbda51ac1aeb3f564607" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0eb5fa936eca872d96717926ca803e59b2ae1a420ec1bbda51ac1aeb3f564607", 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" "0eb5fa936eca872d96717926ca803e59b2ae1a420ec1bbda51ac1aeb3f564607" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "build" "--frozen" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v0.1.6
[INFO] [stderr]    Compiling proc-macro2 v1.0.5
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling serde v1.0.101
[INFO] [stderr]    Compiling ryu v1.0.1
[INFO] [stderr]    Compiling crossbeam-utils v0.6.6
[INFO] [stderr]    Compiling scopeguard v1.0.0
[INFO] [stderr]    Compiling cc v1.0.45
[INFO] [stderr]    Compiling rayon-core v1.6.0
[INFO] [stderr]    Compiling memoffset v0.5.1
[INFO] [stderr]    Compiling bitflags v1.2.0
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling itoa v0.4.4
[INFO] [stderr]    Compiling regex-syntax v0.6.12
[INFO] [stderr]    Compiling adler32 v1.0.4
[INFO] [stderr]    Compiling num-derive v0.2.5
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling num-bigint v0.2.3
[INFO] [stderr]    Compiling num-iter v0.1.39
[INFO] [stderr]    Compiling num-rational v0.2.2
[INFO] [stderr]    Compiling num-complex v0.2.3
[INFO] [stderr]    Compiling lzw v0.10.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.7.2
[INFO] [stderr]    Compiling crossbeam-queue v0.1.2
[INFO] [stderr]    Compiling version_check v0.9.1
[INFO] [stderr]    Compiling either v1.5.3
[INFO] [stderr]    Compiling unindent v0.1.5
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling error-chain v0.12.1
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling crossbeam-deque v0.7.1
[INFO] [stderr]    Compiling deflate v0.7.20
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling inflate v0.4.5
[INFO] [stderr]    Compiling aho-corasick v0.7.6
[INFO] [stderr]    Compiling num_cpus v1.10.1
[INFO] [stderr]    Compiling rustc-demangle v0.1.16
[INFO] [stderr]    Compiling unicode-width v0.1.6
[INFO] [stderr]    Compiling color_quant v1.0.1
[INFO] [stderr]    Compiling atty v0.2.13
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling bitreader v0.3.2
[INFO] [stderr]    Compiling gif v0.10.3
[INFO] [stderr]    Compiling backtrace-sys v0.1.31
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling rayon v1.2.0
[INFO] [stderr]    Compiling png v0.14.1
[INFO] [stderr]    Compiling regex v1.3.1
[INFO] [stderr]    Compiling num v0.2.0
[INFO] [stderr]    Compiling jpeg-decoder v0.1.16
[INFO] [stderr]    Compiling tiff v0.2.2
[INFO] [stderr]    Compiling backtrace v0.3.38
[INFO] [stderr]    Compiling image v0.21.3
[INFO] [stderr]    Compiling pyo3-derive-backend v0.8.1
[INFO] [stderr]    Compiling proc-macro-hack v0.5.10
[INFO] [stderr]    Compiling serde_derive v1.0.101
[INFO] [stderr]    Compiling inventory-impl v0.1.4
[INFO] [stderr]    Compiling ghost v0.1.1
[INFO] [stderr]    Compiling ctor v0.1.12
[INFO] [stderr]    Compiling paste-impl v0.1.6
[INFO] [stderr]    Compiling indoc-impl v0.3.4
[INFO] [stderr]    Compiling inventory v0.1.4
[INFO] [stderr]    Compiling indoc v0.3.4
[INFO] [stderr]    Compiling paste v0.1.6
[INFO] [stderr]    Compiling pyo3cls v0.8.1
[INFO] [stderr]    Compiling serde_json v1.0.41
[INFO] [stderr]    Compiling pyo3 v0.8.1
[INFO] [stderr] error: failed to run custom build command for `pyo3 v0.8.1`
[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/pyo3/498618d0d82bb10f/out/build_script_build` (exit status: 101)
[INFO] [stderr]   --- stderr
[INFO] [stderr] 
[INFO] [stderr]   thread 'main' (1787) panicked at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/pyo3-0.8.1/build.rs:537:9:
[INFO] [stderr]   Error: pyo3 requires a nightly or dev version of Rust.
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x5ed2188f3a51 - <<std[617be2ca0a6fd877]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[a373ad73a504971]::fmt::Display>::fmt
[INFO] [stderr]      1:     0x5ed21890780a - core[a373ad73a504971]::fmt::write
[INFO] [stderr]      2:     0x5ed2188f78bc - <std[617be2ca0a6fd877]::sys::stdio::unix::Stderr as core[a373ad73a504971]::io::write::Write>::write_fmt
[INFO] [stderr]      3:     0x5ed2188d6236 - std[617be2ca0a6fd877]::panicking::default_hook::{closure#0}
[INFO] [stderr]      4:     0x5ed2188ef001 - std[617be2ca0a6fd877]::panicking::default_hook
[INFO] [stderr]      5:     0x5ed2188ef1bb - std[617be2ca0a6fd877]::panicking::panic_with_hook
[INFO] [stderr]      6:     0x5ed2188d58cc - std[617be2ca0a6fd877]::panicking::begin_panic::<&str>::{closure#0}
[INFO] [stderr]      7:     0x5ed2188cf059 - std[617be2ca0a6fd877]::sys::backtrace::__rust_end_short_backtrace::<std[617be2ca0a6fd877]::panicking::begin_panic<&str>::{closure#0}, !>
[INFO] [stderr]      8:     0x5ed2188cce4b - std[617be2ca0a6fd877]::panicking::begin_panic::<&str>
[INFO] [stderr]      9:     0x5ed2187be584 - build_script_build[70271647b364430d]::check_rustc_version
[INFO] [stderr]     10:     0x5ed2187c0364 - build_script_build[70271647b364430d]::main
[INFO] [stderr]     11:     0x5ed2187b8abe - <fn() -> core[a373ad73a504971]::result::Result<(), alloc[2e1b2a31b91974c5]::string::String> as core[a373ad73a504971]::ops::function::FnOnce<()>>::call_once
[INFO] [stderr]     12:     0x5ed2187ab241 - std[617be2ca0a6fd877]::sys::backtrace::__rust_begin_short_backtrace::<fn() -> core[a373ad73a504971]::result::Result<(), alloc[2e1b2a31b91974c5]::string::String>, core[a373ad73a504971]::result::Result<(), alloc[2e1b2a31b91974c5]::string::String>>
[INFO] [stderr]     13:     0x5ed2187b672f - std[617be2ca0a6fd877]::rt::lang_start::<core[a373ad73a504971]::result::Result<(), alloc[2e1b2a31b91974c5]::string::String>>::{closure#0}
[INFO] [stderr]     14:     0x5ed2188ee408 - std[617be2ca0a6fd877]::rt::lang_start_internal
[INFO] [stderr]     15:     0x5ed2187b4ae1 - std[617be2ca0a6fd877]::rt::lang_start::<core[a373ad73a504971]::result::Result<(), alloc[2e1b2a31b91974c5]::string::String>>
[INFO] [stderr]     16:     0x5ed2187c2035 - main
[INFO] [stderr]     17:     0x7abdf9482601 - <unknown>
[INFO] [stderr]     18:     0x7abdf9482718 - __libc_start_main
[INFO] [stderr]     19:     0x5ed2187a96a5 - _start
[INFO] [stderr]     20:                0x0 - <unknown>
[INFO] running `Command { std: "docker" "inspect" "0eb5fa936eca872d96717926ca803e59b2ae1a420ec1bbda51ac1aeb3f564607", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0eb5fa936eca872d96717926ca803e59b2ae1a420ec1bbda51ac1aeb3f564607", kill_on_drop: false }`
[INFO] [stdout] 0eb5fa936eca872d96717926ca803e59b2ae1a420ec1bbda51ac1aeb3f564607
