[INFO] fetching crate core_rustc-serialize 0.3.20-v0.3.19patch1...
[INFO] checking core_rustc-serialize-0.3.20-v0.3.19patch1 against try#ffa4a0215752773248fb0f0a8092f1c3e7907e9e for pr-75585
[INFO] extracting crate core_rustc-serialize 0.3.20-v0.3.19patch1 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate core_rustc-serialize 0.3.20-v0.3.19patch1 on toolchain ffa4a0215752773248fb0f0a8092f1c3e7907e9e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate core_rustc-serialize 0.3.20-v0.3.19patch1
[INFO] finished tweaking crates.io crate core_rustc-serialize 0.3.20-v0.3.19patch1
[INFO] tweaked toml for crates.io crate core_rustc-serialize 0.3.20-v0.3.19patch1 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded core_collections v0.3.20170409
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4e3e0b34e751a888baeb615d54c8c230af614acdc8bb2474453f92041949464d
[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" "4e3e0b34e751a888baeb615d54c8c230af614acdc8bb2474453f92041949464d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4e3e0b34e751a888baeb615d54c8c230af614acdc8bb2474453f92041949464d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e3e0b34e751a888baeb615d54c8c230af614acdc8bb2474453f92041949464d", kill_on_drop: false }`
[INFO] [stdout] 4e3e0b34e751a888baeb615d54c8c230af614acdc8bb2474453f92041949464d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0fd5b1c70809f2214854c59706e4f1f06d3c011a04293d2a001bb053ca5d12b5
[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" "0fd5b1c70809f2214854c59706e4f1f06d3c011a04293d2a001bb053ca5d12b5", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver v0.1.20
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]    Compiling rustc_version v0.1.7
[INFO] [stderr]    Compiling core_collections v0.3.20170409
[INFO] [stderr] error: failed to run custom build command for `core_collections v0.3.20170409`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/core_collections-f8f28230d991640d/build-script-build` (exit code: 101)
[INFO] [stderr]   --- stderr
[INFO] [stderr]   thread 'main' panicked at 'Unknown compiler version, upgrade core_collections?', /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/core_collections-0.3.20170409/build.rs:48:69
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x564a6a7fc0f0 - std::backtrace_rs::backtrace::libunwind::trace::ha1eabb142084ea37
[INFO] [stderr]                                  at /rustc/ffa4a0215752773248fb0f0a8092f1c3e7907e9e/library/std/src/../../backtrace/src/backtrace/libunwind.rs:96
[INFO] [stderr]      1:     0x564a6a7fc0f0 - std::backtrace_rs::backtrace::trace_unsynchronized::hbb8825661d997281
[INFO] [stderr]                                  at /rustc/ffa4a0215752773248fb0f0a8092f1c3e7907e9e/library/std/src/../../backtrace/src/backtrace/mod.rs:66
[INFO] [stderr]      2:     0x564a6a7fc0f0 - std::sys_common::backtrace::_print_fmt::h26d850e2f7183914
[INFO] [stderr]                                  at /rustc/ffa4a0215752773248fb0f0a8092f1c3e7907e9e/library/std/src/sys_common/backtrace.rs:79
[INFO] [stderr]      3:     0x564a6a7fc0f0 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h3834b06f68a2b012
[INFO] [stderr]                                  at /rustc/ffa4a0215752773248fb0f0a8092f1c3e7907e9e/library/std/src/sys_common/backtrace.rs:58
[INFO] [stderr]      4:     0x564a6a819a3c - core::fmt::write::h3a043650ba7bf668
[INFO] [stderr]                                  at /rustc/ffa4a0215752773248fb0f0a8092f1c3e7907e9e/library/core/src/fmt/mod.rs:1117
[INFO] [stderr]      5:     0x564a6a7f9ab5 - std::io::Write::write_fmt::h9c0c8944a1898139
[INFO] [stderr]                                  at /rustc/ffa4a0215752773248fb0f0a8092f1c3e7907e9e/library/std/src/io/mod.rs:1510
[INFO] [stderr]      6:     0x564a6a7fe290 - std::sys_common::backtrace::_print::h693c0c2cc41d4d10
[INFO] [stderr]                                  at /rustc/ffa4a0215752773248fb0f0a8092f1c3e7907e9e/library/std/src/sys_common/backtrace.rs:61
[INFO] [stderr]      7:     0x564a6a7fe290 - std::sys_common::backtrace::print::h213be73e5670b8ea
[INFO] [stderr]                                  at /rustc/ffa4a0215752773248fb0f0a8092f1c3e7907e9e/library/std/src/sys_common/backtrace.rs:48
[INFO] [stderr]      8:     0x564a6a7fe290 - std::panicking::default_hook::{{closure}}::h2d49a3361cc4e7ea
[INFO] [stderr]                                  at /rustc/ffa4a0215752773248fb0f0a8092f1c3e7907e9e/library/std/src/panicking.rs:200
[INFO] [stderr]      9:     0x564a6a7fdfdc - std::panicking::default_hook::hd41fbdeba93207ba
[INFO] [stderr]                                  at /rustc/ffa4a0215752773248fb0f0a8092f1c3e7907e9e/library/std/src/panicking.rs:219
[INFO] [stderr]     10:     0x564a6a7fe8f3 - std::panicking::rust_panic_with_hook::hcab398664b4bd473
[INFO] [stderr]                                  at /rustc/ffa4a0215752773248fb0f0a8092f1c3e7907e9e/library/std/src/panicking.rs:569
[INFO] [stderr]     11:     0x564a6a7fe4c9 - std::panicking::begin_panic_handler::{{closure}}::h7512c6f2998ba93d
[INFO] [stderr]                                  at /rustc/ffa4a0215752773248fb0f0a8092f1c3e7907e9e/library/std/src/panicking.rs:476
[INFO] [stderr]     12:     0x564a6a7fc55c - std::sys_common::backtrace::__rust_end_short_backtrace::h1a25d7e7e1864d3d
[INFO] [stderr]                                  at /rustc/ffa4a0215752773248fb0f0a8092f1c3e7907e9e/library/std/src/sys_common/backtrace.rs:153
[INFO] [stderr]     13:     0x564a6a7fe489 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/ffa4a0215752773248fb0f0a8092f1c3e7907e9e/library/std/src/panicking.rs:475
[INFO] [stderr]     14:     0x564a6a818e41 - core::panicking::panic_fmt::h019ad16a92ccd092
[INFO] [stderr]                                  at /rustc/ffa4a0215752773248fb0f0a8092f1c3e7907e9e/library/core/src/panicking.rs:85
[INFO] [stderr]     15:     0x564a6a818bd3 - core::option::expect_failed::he4d89f45e184f5ae
[INFO] [stderr]                                  at /rustc/ffa4a0215752773248fb0f0a8092f1c3e7907e9e/library/core/src/option.rs:1211
[INFO] [stderr]     16:     0x564a6a7c99b1 - core::option::Option<T>::expect::hb57b3d2128583a91
[INFO] [stderr]                                  at /rustc/ffa4a0215752773248fb0f0a8092f1c3e7907e9e/library/core/src/option.rs:331
[INFO] [stderr]     17:     0x564a6a7c81b2 - build_script_build::main::h30eb0d70ea7d54b7
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/core_collections-0.3.20170409/build.rs:48
[INFO] [stderr]     18:     0x564a6a7cbd7b - core::ops::function::FnOnce::call_once::h55b5afab08e525e3
[INFO] [stderr]                                  at /rustc/ffa4a0215752773248fb0f0a8092f1c3e7907e9e/library/core/src/ops/function.rs:233
[INFO] [stderr]     19:     0x564a6a7c9cae - std::sys_common::backtrace::__rust_begin_short_backtrace::hf6aabf7d7cce43a1
[INFO] [stderr]                                  at /rustc/ffa4a0215752773248fb0f0a8092f1c3e7907e9e/library/std/src/sys_common/backtrace.rs:137
[INFO] [stderr]     20:     0x564a6a7cc171 - std::rt::lang_start::{{closure}}::h17679edd747b890a
[INFO] [stderr]                                  at /rustc/ffa4a0215752773248fb0f0a8092f1c3e7907e9e/library/std/src/rt.rs:66
[INFO] [stderr]     21:     0x564a6a7fed02 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::hde9814ae740a85dc
[INFO] [stderr]                                  at /rustc/ffa4a0215752773248fb0f0a8092f1c3e7907e9e/library/core/src/ops/function.rs:265
[INFO] [stderr]     22:     0x564a6a7fed02 - std::panicking::try::do_call::h3026bab8cd7540d7
[INFO] [stderr]                                  at /rustc/ffa4a0215752773248fb0f0a8092f1c3e7907e9e/library/std/src/panicking.rs:373
[INFO] [stderr]     23:     0x564a6a7fed02 - std::panicking::try::h852bb5e5a66f7f84
[INFO] [stderr]                                  at /rustc/ffa4a0215752773248fb0f0a8092f1c3e7907e9e/library/std/src/panicking.rs:337
[INFO] [stderr]     24:     0x564a6a7fed02 - std::panic::catch_unwind::hfeb0f3dddf7c6a72
[INFO] [stderr]                                  at /rustc/ffa4a0215752773248fb0f0a8092f1c3e7907e9e/library/std/src/panic.rs:394
[INFO] [stderr]     25:     0x564a6a7fed02 - std::rt::lang_start_internal::h32f0ac6e87476559
[INFO] [stderr]                                  at /rustc/ffa4a0215752773248fb0f0a8092f1c3e7907e9e/library/std/src/rt.rs:51
[INFO] [stderr]     26:     0x564a6a7cc147 - std::rt::lang_start::h429cfa9925366a55
[INFO] [stderr]                                  at /rustc/ffa4a0215752773248fb0f0a8092f1c3e7907e9e/library/std/src/rt.rs:65
[INFO] [stderr]     27:     0x564a6a7c89da - main
[INFO] [stderr]     28:     0x7f5b84beb0b3 - __libc_start_main
[INFO] [stderr]     29:     0x564a6a7c20ae - _start
[INFO] [stderr]     30:                0x0 - <unknown>
[INFO] running `Command { std: "docker" "inspect" "0fd5b1c70809f2214854c59706e4f1f06d3c011a04293d2a001bb053ca5d12b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0fd5b1c70809f2214854c59706e4f1f06d3c011a04293d2a001bb053ca5d12b5", kill_on_drop: false }`
[INFO] [stdout] 0fd5b1c70809f2214854c59706e4f1f06d3c011a04293d2a001bb053ca5d12b5