[INFO] updating cached repository https://github.com/RustPython/RustPython
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/mnt/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] [stderr] From https://github.com/RustPython/RustPython
[INFO] [stderr]  + 6e91ba0b...6d28a478 coolreader18/enum-module -> coolreader18/enum-module  (forced update)
[INFO] [stderr]    87f496ed..215eefe0  master                   -> master
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 215eefe0b7acf85ef8e019d3f9f3093f47cd7a91
[INFO] checking RustPython/RustPython against try#b19afc12c4f781e95f168f2fdea339c972f14ae2 for pr-64327
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2FRustPython%2FRustPython" "work/builds/worker-4/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/RustPython/RustPython on toolchain b19afc12c4f781e95f168f2fdea339c972f14ae2-alt
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+b19afc12c4f781e95f168f2fdea339c972f14ae2-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/RustPython/RustPython
[INFO] removed workspace from git repo https://github.com/RustPython/RustPython
[INFO] removed path dependency rustpython-compiler from git repo https://github.com/RustPython/RustPython
[INFO] removed path dependency rustpython-parser from git repo https://github.com/RustPython/RustPython
[INFO] removed path dependency rustpython-vm from git repo https://github.com/RustPython/RustPython
[INFO] finished tweaking git repo https://github.com/RustPython/RustPython
[INFO] tweaked toml for git repo https://github.com/RustPython/RustPython written to work/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/RustPython/RustPython already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+b19afc12c4f781e95f168f2fdea339c972f14ae2-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: the lock file /mnt/big/crater/work/builds/worker-4/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+b19afc12c4f781e95f168f2fdea339c972f14ae2-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+b19afc12c4f781e95f168f2fdea339c972f14ae2-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rustpython-derive v0.1.1
[INFO] [stderr]   Downloaded rustpython-parser v0.1.1
[INFO] [stderr]   Downloaded rustpython-bytecode v0.1.1
[INFO] [stderr]   Downloaded flamescope v0.1.1
[INFO] [stderr]   Downloaded rustpython-vm v0.1.1
[INFO] [stderr]   Downloaded rustpython-compiler v0.1.1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/mnt/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+b19afc12c4f781e95f168f2fdea339c972f14ae2-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 98e79aad238af15e167bed710ab38226bd33b534038b85d5b80f4585935a6589
[INFO] running `"docker" "start" "-a" "98e79aad238af15e167bed710ab38226bd33b534038b85d5b80f4585935a6589"`
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]    Compiling typenum v1.11.2
[INFO] [stderr]    Compiling string_cache_shared v0.3.0
[INFO] [stderr]    Compiling serde v1.0.101
[INFO] [stderr]    Compiling byte-tools v0.3.1
[INFO] [stderr]    Compiling regex-syntax v0.6.12
[INFO] [stderr]    Compiling strsim v0.9.2
[INFO] [stderr]    Compiling new_debug_unreachable v1.0.3
[INFO] [stderr]    Compiling ordermap v0.3.5
[INFO] [stderr]    Compiling either v1.5.3
[INFO] [stderr]    Compiling bit-vec v0.5.1
[INFO] [stderr]    Compiling fixedbitset v0.1.9
[INFO] [stderr]    Compiling opaque-debug v0.2.3
[INFO] [stderr]    Compiling precomputed-hash v0.1.1
[INFO] [stderr]    Compiling term v0.4.6
[INFO] [stderr]    Compiling fake-simd v0.1.2
[INFO] [stderr]    Compiling lalrpop-util v0.16.3
[INFO] [stderr]     Checking unic-common v0.9.0
[INFO] [stderr]    Compiling diff v0.1.11
[INFO] [stderr]     Checking unic-char-range v0.9.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]    Compiling ucd-util v0.1.5
[INFO] [stderr]    Compiling arrayvec v0.4.11
[INFO] [stderr]    Compiling utf8-ranges v1.0.4
[INFO] [stderr]    Compiling pkg-config v0.3.16
[INFO] [stderr]    Compiling wtf8 v0.0.3
[INFO] [stderr]     Checking semver-parser v0.7.0
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]     Checking unic-idna-punycode v0.9.0
[INFO] [stderr]     Checking unic-char-basics v0.9.0
[INFO] [stderr]     Checking static_assertions v0.3.4
[INFO] [stderr]     Checking subtle v1.0.0
[INFO] [stderr]     Checking unicode-width v0.1.6
[INFO] [stderr]     Checking keccak v0.1.0
[INFO] [stderr]    Compiling rustpython-vm v0.1.1
[INFO] [stderr]    Compiling maplit v1.0.2
[INFO] [stderr]    Compiling cpython v0.2.1
[INFO] [stderr]     Checking hex v0.3.2
[INFO] [stderr]     Checking unicode_names2 v0.2.2
[INFO] [stderr]     Checking hexf-parse v0.1.0
[INFO] [stderr]     Checking unicode-casing v0.1.0
[INFO] [stderr]     Checking unicode-segmentation v1.3.0
[INFO] [stderr]     Checking adler32 v1.0.4
[INFO] [stderr]     Checking utf8parse v0.1.1
[INFO] [stderr]     Checking unicode_categories v0.1.1
[INFO] [stderr]    Compiling phf_shared v0.7.24
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling num-complex v0.2.3
[INFO] [stderr]    Compiling num-bigint v0.2.3
[INFO] [stderr]    Compiling bincode v1.2.0
[INFO] [stderr]    Compiling num-iter v0.1.39
[INFO] [stderr]    Compiling num-rational v0.2.2
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling block-padding v0.1.4
[INFO] [stderr]    Compiling itertools v0.8.0
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand_jitter v0.1.4
[INFO] [stderr]    Compiling bit-set v0.5.1
[INFO] [stderr]    Compiling petgraph v0.4.13
[INFO] [stderr]     Checking unic-ucd-version v0.9.0
[INFO] [stderr]     Checking unic-char-property v0.9.0
[INFO] [stderr]    Compiling ascii-canvas v1.0.0
[INFO] [stderr]    Compiling regex-syntax v0.5.6
[INFO] [stderr]     Checking semver v0.9.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]    Compiling libz-sys v1.0.25
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]     Checking unic-ucd-hangul v0.9.0
[INFO] [stderr]     Checking unic-ucd-category v0.9.0
[INFO] [stderr]     Checking unic-ucd-case v0.9.0
[INFO] [stderr]     Checking unic-ucd-name_aliases v0.9.0
[INFO] [stderr]     Checking unic-ucd-ident v0.9.0
[INFO] [stderr]     Checking unic-ucd-block v0.9.0
[INFO] [stderr]     Checking unic-ucd-common v0.9.0
[INFO] [stderr]     Checking unic-idna-mapping v0.9.0
[INFO] [stderr]     Checking unic-emoji-char v0.9.0
[INFO] [stderr]     Checking unic-ucd-age v0.9.0
[INFO] [stderr]     Checking unic-ucd-segment v0.9.0
[INFO] [stderr]     Checking unic-ucd-bidi v0.9.0
[INFO] [stderr]     Checking unic-char v0.9.0
[INFO] [stderr]     Checking crc32fast v1.2.0
[INFO] [stderr]     Checking rustc_version v0.2.3
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling atty v0.2.13
[INFO] [stderr]     Checking dirs-sys v0.3.4
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]     Checking subprocess v0.1.18
[INFO] [stderr]     Checking gethostname v0.2.0
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling aho-corasick v0.7.6
[INFO] [stderr]    Compiling aho-corasick v0.6.10
[INFO] [stderr]    Compiling ena v0.11.0
[INFO] [stderr]    Compiling lexical-core v0.4.6
[INFO] [stderr]    Compiling lexical v2.2.2
[INFO] [stderr]    Compiling rustc_version_runtime v0.1.5
[INFO] [stderr]     Checking unic-ucd-name v0.9.0
[INFO] [stderr]    Compiling generic-array v0.12.3
[INFO] [stderr]     Checking unic-ucd-normal v0.9.0
[INFO] [stderr]     Checking unic-emoji v0.9.0
[INFO] [stderr]     Checking unic-bidi v0.9.0
[INFO] [stderr]     Checking unic-segment v0.9.0
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking regex v1.3.1
[INFO] [stderr] error: failed to run custom build command for `rustc_version_runtime v0.1.5`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/rustc_version_runtime-c129d88b911152b8/build-script-build` (exit code: 101)
[INFO] [stderr] --- stderr
[INFO] [stderr] thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Os { code: 30, kind: Other, message: "Read-only file system" }', src/libcore/result.rs:1165:5
[INFO] [stderr] stack backtrace:
[INFO] [stderr]    0:     0x557e9ba2fa44 - backtrace::backtrace::libunwind::trace::he281d1430a66d201
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.37/src/backtrace/libunwind.rs:88
[INFO] [stderr]    1:     0x557e9ba2fa44 - backtrace::backtrace::trace_unsynchronized::h102bb4b69987d605
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.37/src/backtrace/mod.rs:66
[INFO] [stderr]    2:     0x557e9ba2fa44 - std::sys_common::backtrace::_print_fmt::h7c2f159f268a4f8c
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:77
[INFO] [stderr]    3:     0x557e9ba2fa44 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h54378f2ca7d450f4
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:61
[INFO] [stderr]    4:     0x557e9ba4d95c - core::fmt::write::ha0a3ecae75b0dbc8
[INFO] [stderr]                                at src/libcore/fmt/mod.rs:1030
[INFO] [stderr]    5:     0x557e9ba2d537 - std::io::Write::write_fmt::ha1cf046f2b915c3e
[INFO] [stderr]                                at src/libstd/io/mod.rs:1412
[INFO] [stderr]    6:     0x557e9ba31dc5 - std::sys_common::backtrace::_print::ha9aa7e33ae167e9f
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:65
[INFO] [stderr]    7:     0x557e9ba31dc5 - std::sys_common::backtrace::print::h0f26745f782cf831
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:50
[INFO] [stderr]    8:     0x557e9ba31dc5 - std::panicking::default_hook::{{closure}}::h9ac03e59053b82f0
[INFO] [stderr]                                at src/libstd/panicking.rs:200
[INFO] [stderr]    9:     0x557e9ba31ab6 - std::panicking::default_hook::h2bc2c167050e786d
[INFO] [stderr]                                at src/libstd/panicking.rs:214
[INFO] [stderr]   10:     0x557e9ba32415 - std::panicking::rust_panic_with_hook::h8403eca5575e8757
[INFO] [stderr]                                at src/libstd/panicking.rs:477
[INFO] [stderr]   11:     0x557e9ba31fb2 - std::panicking::continue_panic_fmt::h59d06952784da242
[INFO] [stderr]                                at src/libstd/panicking.rs:384
[INFO] [stderr]   12:     0x557e9ba31ea6 - rust_begin_unwind
[INFO] [stderr]                                at src/libstd/panicking.rs:311
[INFO] [stderr]   13:     0x557e9ba4b07a - core::panicking::panic_fmt::ha0012b4b46a86c25
[INFO] [stderr]                                at src/libcore/panicking.rs:85
[INFO] [stderr]   14:     0x557e9ba4b177 - core::result::unwrap_failed::h68b5899a90c39e73
[INFO] [stderr]                                at src/libcore/result.rs:1165
[INFO] [stderr]   15:     0x557e9ba02c50 - core::result::Result<T,E>::unwrap::h9b8bf48c448f8110
[INFO] [stderr]                                at /rustc/b19afc12c4f781e95f168f2fdea339c972f14ae2/src/libcore/result.rs:933
[INFO] [stderr]   16:     0x557e9b9ff2ab - build_script_build::main::hfa00cf9e0d76c0d0
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustc_version_runtime-0.1.5/build.rs:27
[INFO] [stderr]   17:     0x557e9ba00a40 - std::rt::lang_start::{{closure}}::h7440814888d4472d
[INFO] [stderr]                                at /rustc/b19afc12c4f781e95f168f2fdea339c972f14ae2/src/libstd/rt.rs:64
[INFO] [stderr]   18:     0x557e9ba31e93 - std::rt::lang_start_internal::{{closure}}::hb4c6339b185f201f
[INFO] [stderr]                                at src/libstd/rt.rs:49
[INFO] [stderr]   19:     0x557e9ba31e93 - std::panicking::try::do_call::h467065f75f458473
[INFO] [stderr]                                at src/libstd/panicking.rs:296
[INFO] [stderr]   20:     0x557e9ba3824a - __rust_maybe_catch_panic
[INFO] [stderr]                                at src/libpanic_unwind/lib.rs:80
[INFO] [stderr]   21:     0x557e9ba3290d - std::panicking::try::h67ed39ee2076b60d
[INFO] [stderr]                                at src/libstd/panicking.rs:275
[INFO] [stderr]   22:     0x557e9ba3290d - std::panic::catch_unwind::h1dd211c39ef1a928
[INFO] [stderr]                                at src/libstd/panic.rs:394
[INFO] [stderr]   23:     0x557e9ba3290d - std::rt::lang_start_internal::h66991f896511b48c
[INFO] [stderr]                                at src/libstd/rt.rs:48
[INFO] [stderr]   24:     0x557e9ba00a19 - std::rt::lang_start::ha34e30f0f67bdd49
[INFO] [stderr]                                at /rustc/b19afc12c4f781e95f168f2fdea339c972f14ae2/src/libstd/rt.rs:64
[INFO] [stderr]   25:     0x557e9ba0028a - main
[INFO] [stderr]   26:     0x7fa91b6a7b97 - __libc_start_main
[INFO] [stderr]   27:     0x557e9b9fec7a - _start
[INFO] [stderr]   28:                0x0 - <unknown>
[INFO] [stderr] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "98e79aad238af15e167bed710ab38226bd33b534038b85d5b80f4585935a6589"`
[INFO] running `"docker" "rm" "-f" "98e79aad238af15e167bed710ab38226bd33b534038b85d5b80f4585935a6589"`
[INFO] [stdout] 98e79aad238af15e167bed710ab38226bd33b534038b85d5b80f4585935a6589