[INFO] fetching crate silicon 0.3.2...
[INFO] checking silicon-0.3.2 against master#c9228570668803e3e6402770d55f23a12c9ae686 for pr-79472
[INFO] extracting crate silicon 0.3.2 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate silicon 0.3.2 on toolchain c9228570668803e3e6402770d55f23a12c9ae686
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c9228570668803e3e6402770d55f23a12c9ae686" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate silicon 0.3.2
[INFO] finished tweaking crates.io crate silicon 0.3.2
[INFO] tweaked toml for crates.io crate silicon 0.3.2 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate crates.io crate silicon 0.3.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c9228570668803e3e6402770d55f23a12c9ae686" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+c9228570668803e3e6402770d55f23a12c9ae686" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 468cac8fef1eae3f87f269b5becaa352aedf62cfd11393a17aa4ac595534cf5e
[INFO] running `Command { std: "docker" "start" "-a" "468cac8fef1eae3f87f269b5becaa352aedf62cfd11393a17aa4ac595534cf5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "468cac8fef1eae3f87f269b5becaa352aedf62cfd11393a17aa4ac595534cf5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "468cac8fef1eae3f87f269b5becaa352aedf62cfd11393a17aa4ac595534cf5e", kill_on_drop: false }`
[INFO] [stdout] 468cac8fef1eae3f87f269b5becaa352aedf62cfd11393a17aa4ac595534cf5e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+c9228570668803e3e6402770d55f23a12c9ae686" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b2d4dd3a4deac6fbb31a8ca23cb1847b1f98e88170b8e6a2ac438972be1d5383
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "b2d4dd3a4deac6fbb31a8ca23cb1847b1f98e88170b8e6a2ac438972be1d5383", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling cc v1.0.54
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling syn v1.0.25
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling crc32fast v1.2.0
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling serde v1.0.110
[INFO] [stderr]     Checking ppv-lite86 v0.2.8
[INFO] [stderr]    Compiling matrixmultiply v0.1.15
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]     Checking rawpointer v0.1.0
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking safemem v0.3.3
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking custom_derive v0.1.7
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking termcolor v1.1.0
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]    Compiling servo-fontconfig-sys v4.0.9
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking line-wrap v0.1.1
[INFO] [stderr]     Checking addr2line v0.12.1
[INFO] [stderr]     Checking walkdir v2.3.1
[INFO] [stderr]     Checking conv v0.3.3
[INFO] [stderr]     Checking log v0.4.8
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking dirs-sys v0.3.4
[INFO] [stderr]    Compiling xcb v0.8.2
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.2
[INFO] [stderr]    Compiling proc-macro-error v1.0.2
[INFO] [stderr]    Compiling cmake v0.1.44
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling memoffset v0.5.4
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling num-iter v0.1.40
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling indexmap v1.3.2
[INFO] [stderr]     Checking backtrace v0.3.48
[INFO] [stderr]     Checking clap v2.33.1
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking flate2 v1.0.14
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking deflate v0.8.4
[INFO] [stderr]     Checking stb_truetype v0.3.1
[INFO] [stderr]    Compiling pathfinder_simd v0.5.0
[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-e343d28f23846c0c/build-script-build` (exit code: 101)
[INFO] [stderr]   --- stderr
[INFO] [stderr]   error occured in handler:  ('event:   ', ('xcb', 'Sync', 'AlarmNotify'))
[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/sync.rs'
[INFO] [stderr]   thread 'main' panicked at 'processing of /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/xcb-0.8.2/xml/sync.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:     0x55721e8c4290 - std::backtrace_rs::backtrace::libunwind::trace::h746c3e9529d524bc
[INFO] [stderr]                                  at /rustc/c9228570668803e3e6402770d55f23a12c9ae686/library/std/src/../../backtrace/src/backtrace/libunwind.rs:90:5
[INFO] [stderr]      1:     0x55721e8c4290 - std::backtrace_rs::backtrace::trace_unsynchronized::h86340908ff889faa
[INFO] [stderr]                                  at /rustc/c9228570668803e3e6402770d55f23a12c9ae686/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      2:     0x55721e8c4290 - std::sys_common::backtrace::_print_fmt::h43f85f9b18230404
[INFO] [stderr]                                  at /rustc/c9228570668803e3e6402770d55f23a12c9ae686/library/std/src/sys_common/backtrace.rs:67:5
[INFO] [stderr]      3:     0x55721e8c4290 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hc132ae1a5b5aa7cd
[INFO] [stderr]                                  at /rustc/c9228570668803e3e6402770d55f23a12c9ae686/library/std/src/sys_common/backtrace.rs:46:22
[INFO] [stderr]      4:     0x55721e8e221c - core::fmt::write::hdf023a0036d2a25f
[INFO] [stderr]                                  at /rustc/c9228570668803e3e6402770d55f23a12c9ae686/library/core/src/fmt/mod.rs:1078:17
[INFO] [stderr]      5:     0x55721e8c1572 - std::io::Write::write_fmt::h8580846154bcb66a
[INFO] [stderr]                                  at /rustc/c9228570668803e3e6402770d55f23a12c9ae686/library/std/src/io/mod.rs:1519:15
[INFO] [stderr]      6:     0x55721e8c6105 - std::sys_common::backtrace::_print::h7ee55fed88d107a3
[INFO] [stderr]                                  at /rustc/c9228570668803e3e6402770d55f23a12c9ae686/library/std/src/sys_common/backtrace.rs:49:5
[INFO] [stderr]      7:     0x55721e8c6105 - std::sys_common::backtrace::print::h54a7d3e52a524177
[INFO] [stderr]                                  at /rustc/c9228570668803e3e6402770d55f23a12c9ae686/library/std/src/sys_common/backtrace.rs:36:9
[INFO] [stderr]      8:     0x55721e8c6105 - std::panicking::default_hook::{{closure}}::h60921e857bf55a40
[INFO] [stderr]                                  at /rustc/c9228570668803e3e6402770d55f23a12c9ae686/library/std/src/panicking.rs:208:50
[INFO] [stderr]      9:     0x55721e8c5c5a - std::panicking::default_hook::hf0f9afb1017317fc
[INFO] [stderr]                                  at /rustc/c9228570668803e3e6402770d55f23a12c9ae686/library/std/src/panicking.rs:225:9
[INFO] [stderr]     10:     0x55721e8c68a1 - std::panicking::rust_panic_with_hook::h8d66bf42b407aaea
[INFO] [stderr]                                  at /rustc/c9228570668803e3e6402770d55f23a12c9ae686/library/std/src/panicking.rs:591:17
[INFO] [stderr]     11:     0x55721e8c63e7 - std::panicking::begin_panic_handler::{{closure}}::hde71edcd925d0c5e
[INFO] [stderr]                                  at /rustc/c9228570668803e3e6402770d55f23a12c9ae686/library/std/src/panicking.rs:497:13
[INFO] [stderr]     12:     0x55721e8c474c - std::sys_common::backtrace::__rust_end_short_backtrace::h8a3c7d6cea578919
[INFO] [stderr]                                  at /rustc/c9228570668803e3e6402770d55f23a12c9ae686/library/std/src/sys_common/backtrace.rs:141:18
[INFO] [stderr]     13:     0x55721e8c6349 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/c9228570668803e3e6402770d55f23a12c9ae686/library/std/src/panicking.rs:493:5
[INFO] [stderr]     14:     0x55721e8c62fb - std::panicking::begin_panic_fmt::hee67ce14b77d0396
[INFO] [stderr]                                  at /rustc/c9228570668803e3e6402770d55f23a12c9ae686/library/std/src/panicking.rs:435:5
[INFO] [stderr]     15:     0x55721e8a4cfa - build_script_build::main::{{closure}}::hc191819f857e1617
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/xcb-0.8.2/build.rs:75:17
[INFO] [stderr]     16:     0x55721e8a3978 - build_script_build::visit_xml::hec0503b119e85d1a
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/xcb-0.8.2/build.rs:20:44
[INFO] [stderr]     17:     0x55721e8a40ef - build_script_build::main::h3be8f4dfbb6bfa5e
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/xcb-0.8.2/build.rs:56:5
[INFO] [stderr]     18:     0x55721e8a97eb - core::ops::function::FnOnce::call_once::h68dd4cd4139ccc20
[INFO] [stderr]                                  at /rustc/c9228570668803e3e6402770d55f23a12c9ae686/library/core/src/ops/function.rs:227:5
[INFO] [stderr]     19:     0x55721e8a7f7e - std::sys_common::backtrace::__rust_begin_short_backtrace::hc96038b105dbdd72
[INFO] [stderr]                                  at /rustc/c9228570668803e3e6402770d55f23a12c9ae686/library/std/src/sys_common/backtrace.rs:125:18
[INFO] [stderr]     20:     0x55721e8abaf1 - std::rt::lang_start::{{closure}}::h6658fb51f3d4be15
[INFO] [stderr]                                  at /rustc/c9228570668803e3e6402770d55f23a12c9ae686/library/std/src/rt.rs:66:18
[INFO] [stderr]     21:     0x55721e8c6cc7 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h54c39b9b8451875a
[INFO] [stderr]                                  at /rustc/c9228570668803e3e6402770d55f23a12c9ae686/library/core/src/ops/function.rs:259:13
[INFO] [stderr]     22:     0x55721e8c6cc7 - std::panicking::try::do_call::hcdfba51a06e21b42
[INFO] [stderr]                                  at /rustc/c9228570668803e3e6402770d55f23a12c9ae686/library/std/src/panicking.rs:379:40
[INFO] [stderr]     23:     0x55721e8c6cc7 - std::panicking::try::hb36953ccd24f930d
[INFO] [stderr]                                  at /rustc/c9228570668803e3e6402770d55f23a12c9ae686/library/std/src/panicking.rs:343:19
[INFO] [stderr]     24:     0x55721e8c6cc7 - std::panic::catch_unwind::hbb374cd03beb3824
[INFO] [stderr]                                  at /rustc/c9228570668803e3e6402770d55f23a12c9ae686/library/std/src/panic.rs:396:14
[INFO] [stderr]     25:     0x55721e8c6cc7 - std::rt::lang_start_internal::h97dca9624db2aa85
[INFO] [stderr]                                  at /rustc/c9228570668803e3e6402770d55f23a12c9ae686/library/std/src/rt.rs:51:25
[INFO] [stderr]     26:     0x55721e8abac7 - std::rt::lang_start::h7613857335a41709
[INFO] [stderr]                                  at /rustc/c9228570668803e3e6402770d55f23a12c9ae686/library/std/src/rt.rs:65:5
[INFO] [stderr]     27:     0x55721e8a4dfa - main
[INFO] [stderr]     28:     0x7f1579f420b3 - __libc_start_main
[INFO] [stderr]     29:     0x55721e8a30ae - _start
[INFO] [stderr]     30:                0x0 - <unknown>
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "b2d4dd3a4deac6fbb31a8ca23cb1847b1f98e88170b8e6a2ac438972be1d5383", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b2d4dd3a4deac6fbb31a8ca23cb1847b1f98e88170b8e6a2ac438972be1d5383", kill_on_drop: false }`
[INFO] [stdout] b2d4dd3a4deac6fbb31a8ca23cb1847b1f98e88170b8e6a2ac438972be1d5383