[INFO] cloning repository https://github.com/sthorpe/MerkleMountainRange
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sthorpe/MerkleMountainRange" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsthorpe%2FMerkleMountainRange", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsthorpe%2FMerkleMountainRange'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 97567c73a1de8d30710201261b1927b5c0e1ac0e
[INFO] checking sthorpe/MerkleMountainRange against master#36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923 for pr-81863
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsthorpe%2FMerkleMountainRange" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sthorpe/MerkleMountainRange on toolchain 36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sthorpe/MerkleMountainRange
[INFO] finished tweaking git repo https://github.com/sthorpe/MerkleMountainRange
[INFO] tweaked toml for git repo https://github.com/sthorpe/MerkleMountainRange written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/sthorpe/MerkleMountainRange already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:ce6408862c0f4858e6cd2b85b2cf085ff7d0d6323904d0a94b71664a228554ab" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4111f476a0e36ee62f1d7655908041dc88be45928937e25db48d143519d55cdf
[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" "4111f476a0e36ee62f1d7655908041dc88be45928937e25db48d143519d55cdf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4111f476a0e36ee62f1d7655908041dc88be45928937e25db48d143519d55cdf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4111f476a0e36ee62f1d7655908041dc88be45928937e25db48d143519d55cdf", kill_on_drop: false }`
[INFO] [stdout] 4111f476a0e36ee62f1d7655908041dc88be45928937e25db48d143519d55cdf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:ce6408862c0f4858e6cd2b85b2cf085ff7d0d6323904d0a94b71664a228554ab" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] dde93b78c559e97978965aba16ae925ee7ae7854d41ea8487e78edbaaa246864
[INFO] running `Command { std: "docker" "start" "-a" "dde93b78c559e97978965aba16ae925ee7ae7854d41ea8487e78edbaaa246864", kill_on_drop: false }`
[INFO] [stderr]    Compiling leveldb-sys v2.0.4
[INFO] [stderr]     Checking db-key v0.0.5
[INFO] [stderr]     Checking futures v0.1.29
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr] error: failed to run custom build command for `leveldb-sys v2.0.4`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/leveldb-sys-8168ba4994db60a4/build-script-build` (exit code: 101)
[INFO] [stderr]   --- stdout
[INFO] [stderr]   [build] Started
[INFO] [stderr]   [snappy] Cleaning
[INFO] [stderr]   make: Entering directory '/opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/leveldb-sys-2.0.4/deps/snappy-1.1.2'
[INFO] [stderr]   make: Leaving directory '/opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/leveldb-sys-2.0.4/deps/snappy-1.1.2'
[INFO] [stderr]   [snappy] Configuring
[INFO] [stderr]   [snappy] Building
[INFO] [stderr]   make: Entering directory '/opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/leveldb-sys-2.0.4/deps/snappy-1.1.2'
[INFO] [stderr]   make: Leaving directory '/opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/leveldb-sys-2.0.4/deps/snappy-1.1.2'
[INFO] [stderr]   [build] Copying output files
[INFO] [stderr] 
[INFO] [stderr]   --- stderr
[INFO] [stderr]   make: *** No rule to make target 'distclean'.  Stop.
[INFO] [stderr]   ./configure: line 2171: config.log: Read-only file system
[INFO] [stderr]   ./configure: line 2181: config.log: Read-only file system
[INFO] [stderr]   make: *** No targets specified and no makefile found.  Stop.
[INFO] [stderr]   thread 'main' panicked at 'copy of output files failed', /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/leveldb-sys-2.0.4/src/build.rs:47:14
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x5618e78c0bb0 - std::backtrace_rs::backtrace::libunwind::trace::hb4de9797f80b7b8c
[INFO] [stderr]                                  at /rustc/36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923/library/std/src/../../backtrace/src/backtrace/libunwind.rs:90:5
[INFO] [stderr]      1:     0x5618e78c0bb0 - std::backtrace_rs::backtrace::trace_unsynchronized::h59566d0bd20efff7
[INFO] [stderr]                                  at /rustc/36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      2:     0x5618e78c0bb0 - std::sys_common::backtrace::_print_fmt::hcfa5ce6be50275d4
[INFO] [stderr]                                  at /rustc/36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923/library/std/src/sys_common/backtrace.rs:67:5
[INFO] [stderr]      3:     0x5618e78c0bb0 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hd8c307a38b9bab04
[INFO] [stderr]                                  at /rustc/36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923/library/std/src/sys_common/backtrace.rs:46:22
[INFO] [stderr]      4:     0x5618e78dc3dc - core::fmt::write::h3868db8542c90941
[INFO] [stderr]                                  at /rustc/36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923/library/core/src/fmt/mod.rs:1096:17
[INFO] [stderr]      5:     0x5618e78be692 - std::io::Write::write_fmt::hab90295d5a0f197d
[INFO] [stderr]                                  at /rustc/36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923/library/std/src/io/mod.rs:1568:15
[INFO] [stderr]      6:     0x5618e78c2a05 - std::sys_common::backtrace::_print::h19224910b8700cf1
[INFO] [stderr]                                  at /rustc/36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923/library/std/src/sys_common/backtrace.rs:49:5
[INFO] [stderr]      7:     0x5618e78c2a05 - std::sys_common::backtrace::print::h25dedfa68c5fb84a
[INFO] [stderr]                                  at /rustc/36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923/library/std/src/sys_common/backtrace.rs:36:9
[INFO] [stderr]      8:     0x5618e78c2a05 - std::panicking::default_hook::{{closure}}::h12c5765653a72a42
[INFO] [stderr]                                  at /rustc/36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923/library/std/src/panicking.rs:208:50
[INFO] [stderr]      9:     0x5618e78c2563 - std::panicking::default_hook::he65cee71c4209f0c
[INFO] [stderr]                                  at /rustc/36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923/library/std/src/panicking.rs:225:9
[INFO] [stderr]     10:     0x5618e78c31a1 - std::panicking::rust_panic_with_hook::h01a674d863fe0d8a
[INFO] [stderr]                                  at /rustc/36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923/library/std/src/panicking.rs:591:17
[INFO] [stderr]     11:     0x5618e78c2ce7 - std::panicking::begin_panic_handler::{{closure}}::h9b9fecf185178864
[INFO] [stderr]                                  at /rustc/36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923/library/std/src/panicking.rs:497:13
[INFO] [stderr]     12:     0x5618e78c104c - std::sys_common::backtrace::__rust_end_short_backtrace::h57be46a42dc7f24b
[INFO] [stderr]                                  at /rustc/36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923/library/std/src/sys_common/backtrace.rs:141:18
[INFO] [stderr]     13:     0x5618e78c2c49 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923/library/std/src/panicking.rs:493:5
[INFO] [stderr]     14:     0x5618e78db7b1 - core::panicking::panic_fmt::h20225113c4a2f8fd
[INFO] [stderr]                                  at /rustc/36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923/library/core/src/panicking.rs:92:14
[INFO] [stderr]     15:     0x5618e78db543 - core::option::expect_failed::h8be1ca96ca0d69ca
[INFO] [stderr]                                  at /rustc/36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923/library/core/src/option.rs:1292:5
[INFO] [stderr]     16:     0x5618e78a2e6d - core::option::Option<T>::expect::hfcbbb360e709bff1
[INFO] [stderr]                                  at /rustc/36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923/library/core/src/option.rs:349:21
[INFO] [stderr]     17:     0x5618e788782d - build_script_build::build_snappy::h6fda80c45bea2dff
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/leveldb-sys-2.0.4/src/build.rs:47:5
[INFO] [stderr]     18:     0x5618e7888f61 - build_script_build::main::h2b83c8eb8e287f41
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/leveldb-sys-2.0.4/src/build.rs:129:9
[INFO] [stderr]     19:     0x5618e788ae9b - core::ops::function::FnOnce::call_once::hbf9f4dd4d30c7b9e
[INFO] [stderr]                                  at /rustc/36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923/library/core/src/ops/function.rs:227:5
[INFO] [stderr]     20:     0x5618e789e56e - std::sys_common::backtrace::__rust_begin_short_backtrace::hddb72ddeab2fcefd
[INFO] [stderr]                                  at /rustc/36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923/library/std/src/sys_common/backtrace.rs:125:18
[INFO] [stderr]     21:     0x5618e7890971 - std::rt::lang_start::{{closure}}::hb8b586b25fbf7ee3
[INFO] [stderr]                                  at /rustc/36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923/library/std/src/rt.rs:66:18
[INFO] [stderr]     22:     0x5618e78c35c7 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h2c4fd7d4128112a8
[INFO] [stderr]                                  at /rustc/36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923/library/core/src/ops/function.rs:259:13
[INFO] [stderr]     23:     0x5618e78c35c7 - std::panicking::try::do_call::h41fb7dbbbe7bece6
[INFO] [stderr]                                  at /rustc/36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923/library/std/src/panicking.rs:379:40
[INFO] [stderr]     24:     0x5618e78c35c7 - std::panicking::try::hd38008ccba72bce1
[INFO] [stderr]                                  at /rustc/36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923/library/std/src/panicking.rs:343:19
[INFO] [stderr]     25:     0x5618e78c35c7 - std::panic::catch_unwind::h057e765cd60f2d13
[INFO] [stderr]                                  at /rustc/36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923/library/std/src/panic.rs:431:14
[INFO] [stderr]     26:     0x5618e78c35c7 - std::rt::lang_start_internal::hdb9d0b9d2cdcda8b
[INFO] [stderr]                                  at /rustc/36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923/library/std/src/rt.rs:51:25
[INFO] [stderr]     27:     0x5618e7890947 - std::rt::lang_start::hab377bd8c6d75476
[INFO] [stderr]                                  at /rustc/36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923/library/std/src/rt.rs:65:5
[INFO] [stderr]     28:     0x5618e788a02a - main
[INFO] [stderr]     29:     0x7fed788c00b3 - __libc_start_main
[INFO] [stderr]     30:     0x5618e78820be - _start
[INFO] [stderr]     31:                0x0 - <unknown>
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "dde93b78c559e97978965aba16ae925ee7ae7854d41ea8487e78edbaaa246864", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dde93b78c559e97978965aba16ae925ee7ae7854d41ea8487e78edbaaa246864", kill_on_drop: false }`
[INFO] [stdout] dde93b78c559e97978965aba16ae925ee7ae7854d41ea8487e78edbaaa246864