[INFO] crate ext4 0.6.0 is already in cache
[INFO] extracting crate ext4 0.6.0 into work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/reg/ext4/0.6.0
[INFO] extracting crate ext4 0.6.0 into work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/reg/ext4/0.6.0
[INFO] validating manifest of ext4-0.6.0 on toolchain master#435236b8877cdb98c82eaebfb7887782277265c5
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of ext4-0.6.0 on toolchain try#b5c7f157c20453dde8d47371abe73b32351b4e7f
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing ext4-0.6.0
[INFO] finished frobbing ext4-0.6.0
[INFO] frobbed toml for ext4-0.6.0 written to work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/reg/ext4/0.6.0/Cargo.toml
[INFO] started frobbing ext4-0.6.0
[INFO] finished frobbing ext4-0.6.0
[INFO] frobbed toml for ext4-0.6.0 written to work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/reg/ext4/0.6.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking ext4-0.6.0 against master#435236b8877cdb98c82eaebfb7887782277265c5 for pr-62849
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62849/worker-7/master#435236b8877cdb98c82eaebfb7887782277265c5:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/reg/ext4/0.6.0:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 235ea231b23f5f907fe849fa21ea88112b61eb13be01110640ae697f07e3c0f3
[INFO] running `"docker" "start" "-a" "235ea231b23f5f907fe849fa21ea88112b61eb13be01110640ae697f07e3c0f3"`
[INFO] [stderr]    Compiling ext4 v0.6.0 (/opt/crater/workdir)
[INFO] [stderr]     Checking bootsector v0.1.1
[INFO] [stderr] error: failed to run custom build command for `ext4 v0.6.0 (/opt/crater/workdir)`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/crater/target/debug/build/ext4-d68c869723827d8e/build-script-build` (exit code: 101)
[INFO] [stderr] --- stderr
[INFO] [stderr] tar: all-types.img: Cannot open: Read-only file system
[INFO] [stderr] tar: all-types-32.img: Cannot open: Read-only file system
[INFO] [stderr] tar: all-types-tiny.img: Cannot open: Read-only file system
[INFO] [stderr] tar: all-types-big.img: Cannot open: Read-only file system
[INFO] [stderr] tar: all-types-big-32.img: Cannot open: Read-only file system
[INFO] [stderr] tar: Exiting with failure status due to previous errors
[INFO] [stderr] thread 'main' panicked at 'assertion failed: process::Command::new("tar").args(&["-C", DEST, "-xf",
[INFO] [stderr]                                     "scripts/generate-images/images.tgz"]).spawn()?.wait()?.success()', build.rs:12:5
[INFO] [stderr] stack backtrace:
[INFO] [stderr]    0:     0x5601bb38508b - backtrace::backtrace::libunwind::trace::h88d9499c2d7e1dbc
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.34/src/backtrace/libunwind.rs:88
[INFO] [stderr]    1:     0x5601bb38508b - backtrace::backtrace::trace_unsynchronized::h64df3798ffaf338f
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.34/src/backtrace/mod.rs:66
[INFO] [stderr]    2:     0x5601bb38508b - std::sys_common::backtrace::_print::h549f3692f8d3f393
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:47
[INFO] [stderr]    3:     0x5601bb38508b - std::sys_common::backtrace::print::h037f1d7e6e0e94de
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:36
[INFO] [stderr]    4:     0x5601bb38508b - std::panicking::default_hook::{{closure}}::h88a39cbd1a8489c9
[INFO] [stderr]                                at src/libstd/panicking.rs:200
[INFO] [stderr]    5:     0x5601bb384d66 - std::panicking::default_hook::hdb7c9c6632585072
[INFO] [stderr]                                at src/libstd/panicking.rs:214
[INFO] [stderr]    6:     0x5601bb38574d - std::panicking::rust_panic_with_hook::h906f2b0ace338868
[INFO] [stderr]                                at src/libstd/panicking.rs:477
[INFO] [stderr]    7:     0x5601bb37b8c1 - std::panicking::begin_panic::h714cd2e47914883c
[INFO] [stderr]                                at /rustc/435236b8877cdb98c82eaebfb7887782277265c5/src/libstd/panicking.rs:411
[INFO] [stderr]    8:     0x5601bb375045 - build_script_build::extract_test_images::hd93fb1f2632dde62
[INFO] [stderr]                                at /opt/crater/workdir/build.rs:12
[INFO] [stderr]    9:     0x5601bb37521e - build_script_build::main::hda8e934fa61e2780
[INFO] [stderr]                                at /opt/crater/workdir/build.rs:24
[INFO] [stderr]   10:     0x5601bb37b800 - std::rt::lang_start::{{closure}}::ha3d58abfc91c22b2
[INFO] [stderr]                                at /rustc/435236b8877cdb98c82eaebfb7887782277265c5/src/libstd/rt.rs:64
[INFO] [stderr]   11:     0x5601bb3851a3 - std::rt::lang_start_internal::{{closure}}::h9ea1b9f2bce8ffef
[INFO] [stderr]                                at src/libstd/rt.rs:49
[INFO] [stderr]   12:     0x5601bb3851a3 - std::panicking::try::do_call::hfbd18154d6e81e0d
[INFO] [stderr]                                at src/libstd/panicking.rs:296
[INFO] [stderr]   13:     0x5601bb38b6aa - __rust_maybe_catch_panic
[INFO] [stderr]                                at src/libpanic_unwind/lib.rs:80
[INFO] [stderr]   14:     0x5601bb385c5d - std::panicking::try::h9cb4b237371abf81
[INFO] [stderr]                                at src/libstd/panicking.rs:275
[INFO] [stderr]   15:     0x5601bb385c5d - std::panic::catch_unwind::hd403853a39b4e3c9
[INFO] [stderr]                                at src/libstd/panic.rs:394
[INFO] [stderr]   16:     0x5601bb385c5d - std::rt::lang_start_internal::h7e5e162b169a1510
[INFO] [stderr]                                at src/libstd/rt.rs:48
[INFO] [stderr]   17:     0x5601bb37b7d9 - std::rt::lang_start::h6ce008f72a9119bd
[INFO] [stderr]                                at /rustc/435236b8877cdb98c82eaebfb7887782277265c5/src/libstd/rt.rs:64
[INFO] [stderr]   18:     0x5601bb37525a - main
[INFO] [stderr]   19:     0x7f07803552e1 - __libc_start_main
[INFO] [stderr]   20:     0x5601bb37194a - _start
[INFO] [stderr]   21:                0x0 - <unknown>
[INFO] [stderr] 
[INFO] running `"docker" "inspect" "235ea231b23f5f907fe849fa21ea88112b61eb13be01110640ae697f07e3c0f3"`
[INFO] running `"docker" "rm" "-f" "235ea231b23f5f907fe849fa21ea88112b61eb13be01110640ae697f07e3c0f3"`
[INFO] [stdout] 235ea231b23f5f907fe849fa21ea88112b61eb13be01110640ae697f07e3c0f3