[INFO] updating cached repository https://github.com/dylemma/Falldown.rs
[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] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7c1a6b46fc6f7bd3f5353b4eefbcc32a8adc2f19
[INFO] checking dylemma/Falldown.rs against master#9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7 for pr-64564
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdylemma%2FFalldown.rs" "work/builds/worker-6/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dylemma/Falldown.rs on toolchain 9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7-alt
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/dylemma/Falldown.rs
[INFO] finished tweaking git repo https://github.com/dylemma/Falldown.rs
[INFO] tweaked toml for git repo https://github.com/dylemma/Falldown.rs written to work/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/dylemma/Falldown.rs already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-6/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" "+9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 15ae79fa4723bf816d281248354be7fb7b3874827628700e7128e3e63c954a8e
[INFO] running `"docker" "start" "-a" "15ae79fa4723bf816d281248354be7fb7b3874827628700e7128e3e63c954a8e"`
[INFO] [stderr]    Compiling minimp3-sys v0.3.1
[INFO] [stderr]     Checking itertools v0.7.11
[INFO] [stderr]    Compiling expat-sys v2.1.6
[INFO] [stderr]    Compiling servo-freetype-sys v4.0.5
[INFO] [stderr]    Compiling backtrace-sys v0.1.28
[INFO] [stderr]     Checking crossbeam-deque v0.5.2
[INFO] [stderr]    Compiling xcb v0.8.2
[INFO] [stderr]    Compiling rustc_version_runtime v0.1.5
[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-f07a547062593218/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:     0x5638731d45a4 - backtrace::backtrace::libunwind::trace::h3c777145747bb537
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.37/src/backtrace/libunwind.rs:88
[INFO] [stderr]    1:     0x5638731d45a4 - backtrace::backtrace::trace_unsynchronized::h66b9e4a5d8dcdac1
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.37/src/backtrace/mod.rs:66
[INFO] [stderr]    2:     0x5638731d45a4 - std::sys_common::backtrace::_print_fmt::h67af8761982571ce
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:76
[INFO] [stderr]    3:     0x5638731d45a4 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hd2414c318764e035
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:60
[INFO] [stderr]    4:     0x5638731f24bc - core::fmt::write::h6b1d9e7d0caf83ef
[INFO] [stderr]                                at src/libcore/fmt/mod.rs:1030
[INFO] [stderr]    5:     0x5638731d2097 - std::io::Write::write_fmt::h7d23ef4c2e86d894
[INFO] [stderr]                                at src/libstd/io/mod.rs:1412
[INFO] [stderr]    6:     0x5638731d6925 - std::sys_common::backtrace::_print::h95f9ce51820bb860
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:64
[INFO] [stderr]    7:     0x5638731d6925 - std::sys_common::backtrace::print::h60cdacab02cba05c
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:49
[INFO] [stderr]    8:     0x5638731d6925 - std::panicking::default_hook::{{closure}}::hd6f0e16d93b9b5c8
[INFO] [stderr]                                at src/libstd/panicking.rs:196
[INFO] [stderr]    9:     0x5638731d6616 - std::panicking::default_hook::hd45736b469c8d928
[INFO] [stderr]                                at src/libstd/panicking.rs:210
[INFO] [stderr]   10:     0x5638731d6f75 - std::panicking::rust_panic_with_hook::hcc17bc0996b76a4c
[INFO] [stderr]                                at src/libstd/panicking.rs:473
[INFO] [stderr]   11:     0x5638731d6b12 - std::panicking::continue_panic_fmt::hacd60ce981312f06
[INFO] [stderr]                                at src/libstd/panicking.rs:380
[INFO] [stderr]   12:     0x5638731d6a06 - rust_begin_unwind
[INFO] [stderr]                                at src/libstd/panicking.rs:307
[INFO] [stderr]   13:     0x5638731efbda - core::panicking::panic_fmt::h1ebeaa41bf98abea
[INFO] [stderr]                                at src/libcore/panicking.rs:85
[INFO] [stderr]   14:     0x5638731efcd7 - core::result::unwrap_failed::h231e9151bc35c4cf
[INFO] [stderr]                                at src/libcore/result.rs:1165
[INFO] [stderr]   15:     0x5638731a7a80 - core::result::Result<T,E>::unwrap::h1cafbc39ddc75760
[INFO] [stderr]                                at /rustc/9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7/src/libcore/result.rs:933
[INFO] [stderr]   16:     0x5638731a41cb - build_script_build::main::hf711467092dd26e7
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustc_version_runtime-0.1.5/build.rs:27
[INFO] [stderr]   17:     0x5638731a5960 - std::rt::lang_start::{{closure}}::h63e2275fb4ec1037
[INFO] [stderr]                                at /rustc/9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7/src/libstd/rt.rs:64
[INFO] [stderr]   18:     0x5638731d69f3 - std::rt::lang_start_internal::{{closure}}::h677067c06c8055b2
[INFO] [stderr]                                at src/libstd/rt.rs:49
[INFO] [stderr]   19:     0x5638731d69f3 - std::panicking::try::do_call::h02b31030ec0cae5e
[INFO] [stderr]                                at src/libstd/panicking.rs:292
[INFO] [stderr]   20:     0x5638731dcdaa - __rust_maybe_catch_panic
[INFO] [stderr]                                at src/libpanic_unwind/lib.rs:80
[INFO] [stderr]   21:     0x5638731d746d - std::panicking::try::h3d608dc302373513
[INFO] [stderr]                                at src/libstd/panicking.rs:271
[INFO] [stderr]   22:     0x5638731d746d - std::panic::catch_unwind::hbd3bc0654419de57
[INFO] [stderr]                                at src/libstd/panic.rs:394
[INFO] [stderr]   23:     0x5638731d746d - std::rt::lang_start_internal::hb18b97680fa7fcd0
[INFO] [stderr]                                at src/libstd/rt.rs:48
[INFO] [stderr]   24:     0x5638731a5939 - std::rt::lang_start::h1cbf4ca2a47b4921
[INFO] [stderr]                                at /rustc/9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7/src/libstd/rt.rs:64
[INFO] [stderr]   25:     0x5638731a51aa - main
[INFO] [stderr]   26:     0x7fc061295b97 - __libc_start_main
[INFO] [stderr]   27:     0x5638731a3b9a - _start
[INFO] [stderr]   28:                0x0 - <unknown>
[INFO] [stderr] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: failed to run custom build command for `xcb v0.8.2`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/xcb-73a9029a0d0ee3d9/build-script-build` (exit code: 101)
[INFO] [stderr] --- stderr
[INFO] [stderr] error occured in handler:  ('request: ', ('xcb', 'GenericEvent', 'QueryVersion'))
[INFO] [stderr] Traceback (most recent call last):
[INFO] [stderr]   File "/opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/xcb-0.8.2/rs_client.py", line 2448, in <module>
[INFO] [stderr]     module.generate()
[INFO] [stderr]   File "/opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/xcb-0.8.2/xcbgen/state.py", line 108, in generate
[INFO] [stderr]     self.close()
[INFO] [stderr]   File "/opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/xcb-0.8.2/rs_client.py", line 296, in rs_close
[INFO] [stderr]     _f.writeout(os.path.join(module.rs_srcdir, "ffi", "%s.rs" % _module_name(_ns.ext_name)))
[INFO] [stderr]   File "/opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/xcb-0.8.2/rs_client.py", line 114, in writeout
[INFO] [stderr]     with open(path, 'w') as f:
[INFO] [stderr] OSError: [Errno 30] Read-only file system: '/opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/xcb-0.8.2/src/ffi/genericevent.rs'
[INFO] [stderr] thread 'main' panicked at 'processing of /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/xcb-0.8.2/xml/ge.xml returned non-zero (1)', /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/xcb-0.8.2/build.rs:75:17
[INFO] [stderr] stack backtrace:
[INFO] [stderr]    0:     0x563956117724 - backtrace::backtrace::libunwind::trace::h3c777145747bb537
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.37/src/backtrace/libunwind.rs:88
[INFO] [stderr]    1:     0x563956117724 - backtrace::backtrace::trace_unsynchronized::h66b9e4a5d8dcdac1
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.37/src/backtrace/mod.rs:66
[INFO] [stderr]    2:     0x563956117724 - std::sys_common::backtrace::_print_fmt::h67af8761982571ce
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:76
[INFO] [stderr]    3:     0x563956117724 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hd2414c318764e035
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:60
[INFO] [stderr]    4:     0x5639561351bc - core::fmt::write::h6b1d9e7d0caf83ef
[INFO] [stderr]                                at src/libcore/fmt/mod.rs:1030
[INFO] [stderr]    5:     0x563956114ed7 - std::io::Write::write_fmt::h7d23ef4c2e86d894
[INFO] [stderr]                                at src/libstd/io/mod.rs:1412
[INFO] [stderr]    6:     0x563956119b65 - std::sys_common::backtrace::_print::h95f9ce51820bb860
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:64
[INFO] [stderr]    7:     0x563956119b65 - std::sys_common::backtrace::print::h60cdacab02cba05c
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:49
[INFO] [stderr]    8:     0x563956119b65 - std::panicking::default_hook::{{closure}}::hd6f0e16d93b9b5c8
[INFO] [stderr]                                at src/libstd/panicking.rs:196
[INFO] [stderr]    9:     0x563956119856 - std::panicking::default_hook::hd45736b469c8d928
[INFO] [stderr]                                at src/libstd/panicking.rs:210
[INFO] [stderr]   10:     0x56395611a1b5 - std::panicking::rust_panic_with_hook::hcc17bc0996b76a4c
[INFO] [stderr]                                at src/libstd/panicking.rs:473
[INFO] [stderr]   11:     0x563956119d52 - std::panicking::continue_panic_fmt::hacd60ce981312f06
[INFO] [stderr]                                at src/libstd/panicking.rs:380
[INFO] [stderr]   12:     0x563956119cac - std::panicking::begin_panic_fmt::ha10e51743118097a
[INFO] [stderr]                                at src/libstd/panicking.rs:335
[INFO] [stderr]   13:     0x5639561089c3 - build_script_build::main::{{closure}}::h01e1eb777a69f977
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/xcb-0.8.2/build.rs:75
[INFO] [stderr]   14:     0x563956107296 - build_script_build::visit_xml::h38b497e9eb10b316
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/xcb-0.8.2/build.rs:20
[INFO] [stderr]   15:     0x563956107d93 - build_script_build::main::h985a68895448f40e
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/xcb-0.8.2/build.rs:56
[INFO] [stderr]   16:     0x563956104b20 - std::rt::lang_start::{{closure}}::h18a60a444ded395a
[INFO] [stderr]                                at /rustc/9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7/src/libstd/rt.rs:64
[INFO] [stderr]   17:     0x563956119c33 - std::rt::lang_start_internal::{{closure}}::h677067c06c8055b2
[INFO] [stderr]                                at src/libstd/rt.rs:49
[INFO] [stderr]   18:     0x563956119c33 - std::panicking::try::do_call::h02b31030ec0cae5e
[INFO] [stderr]                                at src/libstd/panicking.rs:292
[INFO] [stderr]   19:     0x5639561203aa - __rust_maybe_catch_panic
[INFO] [stderr]                                at src/libpanic_unwind/lib.rs:80
[INFO] [stderr]   20:     0x56395611a6ad - std::panicking::try::h3d608dc302373513
[INFO] [stderr]                                at src/libstd/panicking.rs:271
[INFO] [stderr]   21:     0x56395611a6ad - std::panic::catch_unwind::hbd3bc0654419de57
[INFO] [stderr]                                at src/libstd/panic.rs:394
[INFO] [stderr]   22:     0x56395611a6ad - std::rt::lang_start_internal::hb18b97680fa7fcd0
[INFO] [stderr]                                at src/libstd/rt.rs:48
[INFO] [stderr]   23:     0x563956104af9 - std::rt::lang_start::h6abefde530a2ca05
[INFO] [stderr]                                at /rustc/9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7/src/libstd/rt.rs:64
[INFO] [stderr]   24:     0x563956108b0a - main
[INFO] [stderr]   25:     0x7f4694dc8b97 - __libc_start_main
[INFO] [stderr]   26:     0x5639561011ea - _start
[INFO] [stderr]   27:                0x0 - <unknown>
[INFO] [stderr] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "15ae79fa4723bf816d281248354be7fb7b3874827628700e7128e3e63c954a8e"`
[INFO] running `"docker" "rm" "-f" "15ae79fa4723bf816d281248354be7fb7b3874827628700e7128e3e63c954a8e"`
[INFO] [stdout] 15ae79fa4723bf816d281248354be7fb7b3874827628700e7128e3e63c954a8e