[INFO] crate mdbook-epub 0.2.0 is already in cache
[INFO] extracting crate mdbook-epub 0.2.0 into work/ex/pr-60039/sources/master#efe2f32a6b8217425f361ec7c206910c611c03ee/reg/mdbook-epub/0.2.0
[INFO] extracting crate mdbook-epub 0.2.0 into work/ex/pr-60039/sources/try#78b0bd8441ef961f6475e3d47fe3bca38cb83432/reg/mdbook-epub/0.2.0
[INFO] validating manifest of mdbook-epub-0.2.0 on toolchain master#efe2f32a6b8217425f361ec7c206910c611c03ee
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+efe2f32a6b8217425f361ec7c206910c611c03ee-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of mdbook-epub-0.2.0 on toolchain try#78b0bd8441ef961f6475e3d47fe3bca38cb83432
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+78b0bd8441ef961f6475e3d47fe3bca38cb83432-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing mdbook-epub-0.2.0
[INFO] finished frobbing mdbook-epub-0.2.0
[INFO] frobbed toml for mdbook-epub-0.2.0 written to work/ex/pr-60039/sources/master#efe2f32a6b8217425f361ec7c206910c611c03ee/reg/mdbook-epub/0.2.0/Cargo.toml
[INFO] started frobbing mdbook-epub-0.2.0
[INFO] finished frobbing mdbook-epub-0.2.0
[INFO] frobbed toml for mdbook-epub-0.2.0 written to work/ex/pr-60039/sources/try#78b0bd8441ef961f6475e3d47fe3bca38cb83432/reg/mdbook-epub/0.2.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+efe2f32a6b8217425f361ec7c206910c611c03ee-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+78b0bd8441ef961f6475e3d47fe3bca38cb83432-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+efe2f32a6b8217425f361ec7c206910c611c03ee-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+78b0bd8441ef961f6475e3d47fe3bca38cb83432-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking mdbook-epub-0.2.0 against try#78b0bd8441ef961f6475e3d47fe3bca38cb83432 for pr-60039
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-60039/worker-0/try#78b0bd8441ef961f6475e3d47fe3bca38cb83432:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-60039/sources/try#78b0bd8441ef961f6475e3d47fe3bca38cb83432/reg/mdbook-epub/0.2.0:/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" "+78b0bd8441ef961f6475e3d47fe3bca38cb83432-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 1f052bdcb54ad8946b1f4dc65804d0406c80ba6640a3bc44a418b19c9c7aedd7
[INFO] running `"docker" "start" "-a" "1f052bdcb54ad8946b1f4dc65804d0406c80ba6640a3bc44a418b19c9c7aedd7"`
[INFO] [stderr]    Compiling crossbeam v0.2.12
[INFO] [stderr]    Compiling home v0.3.4
[INFO] [stderr]    Compiling shell-escape v0.1.4
[INFO] [stderr]    Compiling hex v0.2.0
[INFO] [stderr]    Compiling memchr v1.0.2
[INFO] [stderr]    Compiling jobserver v0.1.13
[INFO] [stderr]    Compiling fs2 v0.4.3
[INFO] [stderr]    Compiling filetime v0.1.15
[INFO] [stderr]    Compiling serde_ignored v0.0.4
[INFO] [stderr]    Compiling semver v0.8.0
[INFO] [stderr]    Compiling tar v0.4.23
[INFO] [stderr]    Compiling globset v0.2.1
[INFO] [stderr]    Compiling libssh2-sys v0.2.11
[INFO] [stderr]    Compiling curl-sys v0.4.18
[INFO] [stderr]    Compiling curl v0.4.21
[INFO] [stderr]    Compiling docopt v0.8.3
[INFO] [stderr]     Checking zip v0.2.8
[INFO] [stderr]    Compiling libgit2-sys v0.6.19
[INFO] [stderr]     Checking epub v1.2.0
[INFO] [stderr]     Checking epub-builder v0.3.0
[INFO] [stderr]    Compiling git2 v0.6.11
[INFO] [stderr]    Compiling ignore v0.2.2
[INFO] [stderr]    Compiling crates-io v0.13.0
[INFO] [stderr]    Compiling git2-curl v0.7.0
[INFO] [stderr]    Compiling cargo v0.24.0
[INFO] [stderr]    Compiling mdbook-epub v0.2.0 (/opt/crater/workdir)
[INFO] [stderr] error: failed to run custom build command for `mdbook-epub v0.2.0 (/opt/crater/workdir)`
[INFO] [stderr] process didn't exit successfully: `/opt/crater/target/debug/build/mdbook-epub-60ec1495a29d37f0/build-script-build` (exit code: 101)
[INFO] [stderr] --- stderr
[INFO] [stderr] thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: CargoError(Msg("failed to write /opt/crater/workdir/Cargo.lock"), State { next_error: Some(CargoError(Msg("failed to open: /opt/crater/workdir/Cargo.lock"), State { next_error: Some(Os { code: 30, kind: Other, message: "Read-only file system" }), backtrace: Some(stack backtrace:
[INFO] [stderr]    0: error_chain::make_backtrace::h0ab42efde2c65abc (0x559986203018)
[INFO] [stderr]              at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/error-chain-0.11.0/src/lib.rs:616
[INFO] [stderr]    1: core::ops::function::FnOnce::call_once::h00e23fac40836eb8 (0x5599858be5a9)
[INFO] [stderr]              at /rustc/78b0bd8441ef961f6475e3d47fe3bca38cb83432/src/libcore/ops/function.rs:231
[INFO] [stderr]    2: core::option::Option<T>::or_else::h8bf8a5f885e1098c (0x559985ade694)
[INFO] [stderr]              at /rustc/78b0bd8441ef961f6475e3d47fe3bca38cb83432/src/libcore/option.rs:716
[INFO] [stderr]    3: error_chain::State::new::hfbe82fc9a77f04c1 (0x559985b4eda1)
[INFO] [stderr]              at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/error-chain-0.11.0/src/lib.rs:724
[INFO] [stderr]    4: <core::result::Result<T,E> as cargo::util::errors::CargoResultExt<T>>::chain_err::{{closure}}::hf6460066b40e79ff (0x559985abafa9)
[INFO] [stderr]              at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/cargo-0.24.0/<::error_chain::error_chain::impl_error_chain_processed macros>:143
[INFO] [stderr]    5: core::result::Result<T,E>::map_err::h53d348d07d24e0fc (0x559985932a25)
[INFO] [stderr]              at /rustc/78b0bd8441ef961f6475e3d47fe3bca38cb83432/src/libcore/result.rs:522
[INFO] [stderr]    6: <core::result::Result<T,E> as cargo::util::errors::CargoResultExt<T>>::chain_err::hab89c4098a08c654 (0x55998594e754)
[INFO] [stderr]              at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/cargo-0.24.0/<::error_chain::error_chain::impl_error_chain_processed macros>:141
[INFO] [stderr]    7: cargo::util::flock::Filesystem::open::h3a60cee427d42bcc (0x559985ab2b50)
[INFO] [stderr]              at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/cargo-0.24.0/src/cargo/util/flock.rs:208
[INFO] [stderr]    8: cargo::util::flock::Filesystem::open_rw::hd550c32c2359c580 (0x559985ab25ee)
[INFO] [stderr]              at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/cargo-0.24.0/src/cargo/util/flock.rs:168
[INFO] [stderr]    9: cargo::ops::lockfile::write_pkg_lockfile::h794ff6242fda244f (0x559985b7a164)
[INFO] [stderr]              at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/cargo-0.24.0/src/cargo/ops/lockfile.rs:84
[INFO] [stderr]   10: cargo::ops::resolve::resolve_with_registry::h36c39a31f3603a7e (0x5599859da774)
[INFO] [stderr]              at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/cargo-0.24.0/src/cargo/ops/resolve.rs:97
[INFO] [stderr]   11: cargo::ops::resolve::resolve_ws::h4bee930eae08ba91 (0x5599859da1a2)
[INFO] [stderr]              at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/cargo-0.24.0/src/cargo/ops/resolve.rs:18
[INFO] [stderr]   12: build_script_build::find_dependency_version::hbdfb04e5bba09331 (0x5599857580e9)
[INFO] [stderr]              at /opt/crater/workdir/build.rs:35
[INFO] [stderr]   13: build_script_build::main::h6a1a5c0c6799786e (0x55998575765b)
[INFO] [stderr]              at /opt/crater/workdir/build.rs:18
[INFO] [stderr]   14: std::rt::lang_start::{{closure}}::hb27d49eca6d35a23 (0x5599857589df)
[INFO] [stderr]              at /rustc/78b0bd8441ef961f6475e3d47fe3bca38cb83432/src/libstd/rt.rs:64
[INFO] [stderr]   15: {{closure}} (0x559986252c22)
[INFO] [stderr]              at src/libstd/rt.rs:49
[INFO] [stderr]       do_call<closure,i32>
[INFO] [stderr]              at src/libstd/panicking.rs:293
[INFO] [stderr]   16: __rust_maybe_catch_panic (0x55998625ae09)
[INFO] [stderr]              at src/libpanic_unwind/lib.rs:85
[INFO] [stderr]   17: try<i32,closure> (0x5599862537ec)
[INFO] [stderr]              at src/libstd/panicking.rs:272
[INFO] [stderr]       catch_unwind<closure,i32>
[INFO] [stderr]              at src/libstd/panic.rs:388
[INFO] [stderr]       lang_start_internal
[INFO] [stderr]              at src/libstd/rt.rs:48
[INFO] [stderr]   18: std::rt::lang_start::h2d1ddb65c067cb78 (0x5599857589b8)
[INFO] [stderr]              at /rustc/78b0bd8441ef961f6475e3d47fe3bca38cb83432/src/libstd/rt.rs:64
[INFO] [stderr]   19: main (0x5599857582d9)
[INFO] [stderr]   20: __libc_start_main (0x7f75154112e0)
[INFO] [stderr]   21: _start (0x559985754889)
[INFO] [stderr]   22: <unknown> (0x0)) })), backtrace: Some(stack backtrace:
[INFO] [stderr]    0: error_chain::make_backtrace::h0ab42efde2c65abc (0x559986203018)
[INFO] [stderr]              at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/error-chain-0.11.0/src/lib.rs:616
[INFO] [stderr]    1: core::ops::function::FnOnce::call_once::h00e23fac40836eb8 (0x5599858be5a9)
[INFO] [stderr]              at /rustc/78b0bd8441ef961f6475e3d47fe3bca38cb83432/src/libcore/ops/function.rs:231
[INFO] [stderr]    2: core::option::Option<T>::or_else::h8bf8a5f885e1098c (0x559985ade694)
[INFO] [stderr]              at /rustc/78b0bd8441ef961f6475e3d47fe3bca38cb83432/src/libcore/option.rs:716
[INFO] [stderr]    3: error_chain::State::new::hfbe82fc9a77f04c1 (0x559985b4eda1)
[INFO] [stderr]              at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/error-chain-0.11.0/src/lib.rs:724
[INFO] [stderr]    4: <core::result::Result<T,E> as cargo::util::errors::CargoResultExt<T>>::chain_err::{{closure}}::hf6460066b40e79ff (0x559985abafa9)
[INFO] [stderr]              at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/cargo-0.24.0/<::error_chain::error_chain::impl_error_chain_processed macros>:143
[INFO] [stderr]    5: core::result::Result<T,E>::map_err::h53d348d07d24e0fc (0x559985932a25)
[INFO] [stderr]              at /rustc/78b0bd8441ef961f6475e3d47fe3bca38cb83432/src/libcore/result.rs:522
[INFO] [stderr]    6: <core::result::Result<T,E> as cargo::util::errors::CargoResultExt<T>>::chain_err::hab89c4098a08c654 (0x55998594e754)
[INFO] [stderr]              at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/cargo-0.24.0/<::error_chain::error_chain::impl_error_chain_processed macros>:141
[INFO] [stderr]    7: cargo::util::flock::Filesystem::open::h3a60cee427d42bcc (0x559985ab2b50)
[INFO] [stderr]              at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/cargo-0.24.0/src/cargo/util/flock.rs:208
[INFO] [stderr]    8: cargo::util::flock::Filesystem::open_rw::hd550c32c2359c580 (0x559985ab25ee)
[INFO] [stderr]              at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/cargo-0.24.0/src/cargo/util/flock.rs:168
[INFO] [stderr]    9: cargo::ops::lockfile::write_pkg_lockfile::h794ff6242fda244f (0x559985b7a164)
[INFO] [stderr]              at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/cargo-0.24.0/src/cargo/ops/lockfile.rs:84
[INFO] [stderr]   10: cargo::ops::resolve::resolve_with_registry::h36c39a31f3603a7e (0x5599859da774)
[INFO] [stderr]              at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/cargo-0.24.0/src/cargo/ops/resolve.rs:97
[INFO] [stderr]   11: cargo::ops::resolve::resolve_ws::h4bee930eae08ba91 (0x5599859da1a2)
[INFO] [stderr]              at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/cargo-0.24.0/src/cargo/ops/resolve.rs:18
[INFO] [stderr]   12: build_script_build::find_dependency_version::hbdfb04e5bba09331 (0x5599857580e9)
[INFO] [stderr]              at /opt/crater/workdir/build.rs:35
[INFO] [stderr]   13: build_script_build::main::h6a1a5c0c6799786e (0x55998575765b)
[INFO] [stderr]              at /opt/crater/workdir/build.rs:18
[INFO] [stderr]   14: std::rt::lang_start::{{closure}}::hb27d49eca6d35a23 (0x5599857589df)
[INFO] [stderr]              at /rustc/78b0bd8441ef961f6475e3d47fe3bca38cb83432/src/libstd/rt.rs:64
[INFO] [stderr]   15: {{closure}} (0x559986252c22)
[INFO] [stderr]              at src/libstd/rt.rs:49
[INFO] [stderr]       do_call<closure,i32>
[INFO] [stderr]              at src/libstd/panicking.rs:293
[INFO] [stderr]   16: __rust_maybe_catch_panic (0x55998625ae09)
[INFO] [stderr]              at src/libpanic_unwind/lib.rs:85
[INFO] [stderr]   17: try<i32,closure> (0x5599862537ec)
[INFO] [stderr]              at src/libstd/panicking.rs:272
[INFO] [stderr]       catch_unwind<closure,i32>
[INFO] [stderr]              at src/libstd/panic.rs:388
[INFO] [stderr]       lang_start_internal
[INFO] [stderr]              at src/libstd/rt.rs:48
[INFO] [stderr]   18: std::rt::lang_start::h2d1ddb65c067cb78 (0x5599857589b8)
[INFO] [stderr]              at /rustc/78b0bd8441ef961f6475e3d47fe3bca38cb83432/src/libstd/rt.rs:64
[INFO] [stderr]   19: main (0x5599857582d9)
[INFO] [stderr]   20: __libc_start_main (0x7f75154112e0)
[INFO] [stderr]   21: _start (0x559985754889)
[INFO] [stderr]   22: <unknown> (0x0)) })', src/libcore/result.rs:999:5
[INFO] [stderr] stack backtrace:
[INFO] [stderr]    0:     0x559986253f13 - std::sys::unix::backtrace::tracing::imp::unwind_backtrace::h175c35bedfe324eb
[INFO] [stderr]                                at src/libstd/sys/unix/backtrace/tracing/gcc_s.rs:39
[INFO] [stderr]    1:     0x55998624f38b - std::sys_common::backtrace::_print::h01694821edef617a
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:71
[INFO] [stderr]    2:     0x559986252b16 - std::panicking::default_hook::{{closure}}::h62cbe23db3262ad8
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:59
[INFO] [stderr]                                at src/libstd/panicking.rs:197
[INFO] [stderr]    3:     0x5599862528a9 - std::panicking::default_hook::h917594e1ea7adc3f
[INFO] [stderr]                                at src/libstd/panicking.rs:211
[INFO] [stderr]    4:     0x55998625321f - std::panicking::rust_panic_with_hook::h1fb2ce490ccdf024
[INFO] [stderr]                                at src/libstd/panicking.rs:474
[INFO] [stderr]    5:     0x559986252da1 - std::panicking::continue_panic_fmt::hb6bb79da952ec340
[INFO] [stderr]                                at src/libstd/panicking.rs:381
[INFO] [stderr]    6:     0x559986252c85 - rust_begin_unwind
[INFO] [stderr]                                at src/libstd/panicking.rs:308
[INFO] [stderr]    7:     0x55998626ec5c - core::panicking::panic_fmt::h0f9d7e1fa9fb22bf
[INFO] [stderr]                                at src/libcore/panicking.rs:85
[INFO] [stderr]    8:     0x559985758574 - core::result::unwrap_failed::h8e584082407ff550
[INFO] [stderr]                                at /rustc/78b0bd8441ef961f6475e3d47fe3bca38cb83432/src/libcore/macros.rs:18
[INFO] [stderr]    9:     0x55998575878d - core::result::Result<T,E>::unwrap::h1db071aae8a651e1
[INFO] [stderr]                                at /rustc/78b0bd8441ef961f6475e3d47fe3bca38cb83432/src/libcore/result.rs:800
[INFO] [stderr]   10:     0x55998575766c - build_script_build::main::h6a1a5c0c6799786e
[INFO] [stderr]                                at /opt/crater/workdir/build.rs:18
[INFO] [stderr]   11:     0x5599857589df - std::rt::lang_start::{{closure}}::hb27d49eca6d35a23
[INFO] [stderr]                                at /rustc/78b0bd8441ef961f6475e3d47fe3bca38cb83432/src/libstd/rt.rs:64
[INFO] [stderr]   12:     0x559986252c22 - std::panicking::try::do_call::h60d8cccf379053fe
[INFO] [stderr]                                at src/libstd/rt.rs:49
[INFO] [stderr]                                at src/libstd/panicking.rs:293
[INFO] [stderr]   13:     0x55998625ae09 - __rust_maybe_catch_panic
[INFO] [stderr]                                at src/libpanic_unwind/lib.rs:85
[INFO] [stderr]   14:     0x5599862537ec - std::rt::lang_start_internal::h629f5b3976019ae3
[INFO] [stderr]                                at src/libstd/panicking.rs:272
[INFO] [stderr]                                at src/libstd/panic.rs:388
[INFO] [stderr]                                at src/libstd/rt.rs:48
[INFO] [stderr]   15:     0x5599857589b8 - std::rt::lang_start::h2d1ddb65c067cb78
[INFO] [stderr]                                at /rustc/78b0bd8441ef961f6475e3d47fe3bca38cb83432/src/libstd/rt.rs:64
[INFO] [stderr]   16:     0x5599857582d9 - main
[INFO] [stderr]   17:     0x7f75154112e0 - __libc_start_main
[INFO] [stderr]   18:     0x559985754889 - _start
[INFO] [stderr]   19:                0x0 - <unknown>
[INFO] [stderr] 
[INFO] running `"docker" "inspect" "1f052bdcb54ad8946b1f4dc65804d0406c80ba6640a3bc44a418b19c9c7aedd7"`
[INFO] running `"docker" "rm" "-f" "1f052bdcb54ad8946b1f4dc65804d0406c80ba6640a3bc44a418b19c9c7aedd7"`
[INFO] [stdout] 1f052bdcb54ad8946b1f4dc65804d0406c80ba6640a3bc44a418b19c9c7aedd7