[INFO] crate ext4 0.6.0 is already in cache
[INFO] extracting crate ext4 0.6.0 into work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/reg/ext4/0.6.0
[INFO] extracting crate ext4 0.6.0 into work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/reg/ext4/0.6.0
[INFO] validating manifest of ext4-0.6.0 on toolchain master#5f9c0448dde167128d668da4555879f64e56af1d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of ext4-0.6.0 on toolchain try#8ec8125bea94852768b56958f05da47666c21ab0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-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-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/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-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/reg/ext4/0.6.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking ext4-0.6.0 against try#8ec8125bea94852768b56958f05da47666c21ab0 for pr-62133
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62133/worker-2/try#8ec8125bea94852768b56958f05da47666c21ab0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/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" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] af82ade0a995bd3aaada8eff0189540e9ac16b22b85d2246e564411131b990f7
[INFO] running `"docker" "start" "-a" "af82ade0a995bd3aaada8eff0189540e9ac16b22b85d2246e564411131b990f7"`
[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-b1b26f81c5381007/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:     0x564af5336ebb - backtrace::backtrace::libunwind::trace::h65f453dfe0027df1
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.29/src/backtrace/libunwind.rs:88
[INFO] [stderr]    1:     0x564af5336ebb - backtrace::backtrace::trace_unsynchronized::hcf757005c6accfed
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.29/src/backtrace/mod.rs:66
[INFO] [stderr]    2:     0x564af5336ebb - std::sys_common::backtrace::_print::h3230a9d2592a2eba
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:47
[INFO] [stderr]    3:     0x564af5336ebb - std::sys_common::backtrace::print::h19f579688627ee7e
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:36
[INFO] [stderr]    4:     0x564af5336ebb - std::panicking::default_hook::{{closure}}::h472b43365b331815
[INFO] [stderr]                                at src/libstd/panicking.rs:198
[INFO] [stderr]    5:     0x564af5336b97 - std::panicking::default_hook::h0857821e5ff5a369
[INFO] [stderr]                                at src/libstd/panicking.rs:212
[INFO] [stderr]    6:     0x564af5337580 - std::panicking::rust_panic_with_hook::ha9d31dc2aa8d852d
[INFO] [stderr]                                at src/libstd/panicking.rs:475
[INFO] [stderr]    7:     0x564af532cd64 - std::panicking::begin_panic::hbc3862d802d17478
[INFO] [stderr]                                at /rustc/8ec8125bea94852768b56958f05da47666c21ab0/src/libstd/panicking.rs:409
[INFO] [stderr]    8:     0x564af532d880 - build_script_build::extract_test_images::h956b46775116a0ed
[INFO] [stderr]                                at /opt/crater/workdir/build.rs:12
[INFO] [stderr]    9:     0x564af532da5e - build_script_build::main::ha537495f678d0abb
[INFO] [stderr]                                at /opt/crater/workdir/build.rs:24
[INFO] [stderr]   10:     0x564af532db60 - std::rt::lang_start::{{closure}}::h7021b3ab055b4c7a
[INFO] [stderr]                                at /rustc/8ec8125bea94852768b56958f05da47666c21ab0/src/libstd/rt.rs:64
[INFO] [stderr]   11:     0x564af5336fd3 - std::rt::lang_start_internal::{{closure}}::h358a76ea39d8997f
[INFO] [stderr]                                at src/libstd/rt.rs:49
[INFO] [stderr]   12:     0x564af5336fd3 - std::panicking::try::do_call::h1fdcc0a978075552
[INFO] [stderr]                                at src/libstd/panicking.rs:294
[INFO] [stderr]   13:     0x564af533d4aa - __rust_maybe_catch_panic
[INFO] [stderr]                                at src/libpanic_unwind/lib.rs:82
[INFO] [stderr]   14:     0x564af5337a8d - std::panicking::try::hd48ddd0547e22f90
[INFO] [stderr]                                at src/libstd/panicking.rs:273
[INFO] [stderr]   15:     0x564af5337a8d - std::panic::catch_unwind::heb66ca2bf3960f9b
[INFO] [stderr]                                at src/libstd/panic.rs:388
[INFO] [stderr]   16:     0x564af5337a8d - std::rt::lang_start_internal::h7208f2146229fed7
[INFO] [stderr]                                at src/libstd/rt.rs:48
[INFO] [stderr]   17:     0x564af532db39 - std::rt::lang_start::ha59aa84e4a6f5dbb
[INFO] [stderr]                                at /rustc/8ec8125bea94852768b56958f05da47666c21ab0/src/libstd/rt.rs:64
[INFO] [stderr]   18:     0x564af532da9a - main
[INFO] [stderr]   19:     0x7f2c524802e1 - __libc_start_main
[INFO] [stderr]   20:     0x564af53246da - _start
[INFO] [stderr]   21:                0x0 - <unknown>
[INFO] [stderr] 
[INFO] running `"docker" "inspect" "af82ade0a995bd3aaada8eff0189540e9ac16b22b85d2246e564411131b990f7"`
[INFO] running `"docker" "rm" "-f" "af82ade0a995bd3aaada8eff0189540e9ac16b22b85d2246e564411131b990f7"`
[INFO] [stdout] af82ade0a995bd3aaada8eff0189540e9ac16b22b85d2246e564411131b990f7