[INFO] updating cached repository PlasmaPower/kmer-counter
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/PlasmaPower/kmer-counter
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/PlasmaPower/kmer-counter" "work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/PlasmaPower/kmer-counter"`
[INFO] [stderr] Cloning into 'work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/PlasmaPower/kmer-counter'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/PlasmaPower/kmer-counter" "work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/PlasmaPower/kmer-counter"`
[INFO] [stderr] Cloning into 'work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/PlasmaPower/kmer-counter'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2c45214e26574202f848066e0a991ef5274443d0
[INFO] sha for GitHub repo PlasmaPower/kmer-counter: 2c45214e26574202f848066e0a991ef5274443d0
[INFO] validating manifest of PlasmaPower/kmer-counter on toolchain master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of PlasmaPower/kmer-counter on toolchain try#7fea0229842e79db1159ea58ad9a653b288efee9
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing PlasmaPower/kmer-counter
[INFO] finished frobbing PlasmaPower/kmer-counter
[INFO] frobbed toml for PlasmaPower/kmer-counter written to work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/PlasmaPower/kmer-counter/Cargo.toml
[INFO] started frobbing PlasmaPower/kmer-counter
[INFO] finished frobbing PlasmaPower/kmer-counter
[INFO] frobbed toml for PlasmaPower/kmer-counter written to work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/PlasmaPower/kmer-counter/Cargo.toml
[INFO] crate PlasmaPower/kmer-counter has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing PlasmaPower/kmer-counter against master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54 for pr-57967
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-6/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/PlasmaPower/kmer-counter:/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" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "build" "--frozen"`
[INFO] [stdout] 3e7a319e5ea46b83edfca9c428ef894b8c877a411d421a82a038ce33e9dcd17a
[INFO] running `"docker" "start" "-a" "3e7a319e5ea46b83edfca9c428ef894b8c877a411d421a82a038ce33e9dcd17a"`
[INFO] [stderr]    Compiling clap v2.19.0
[INFO] [stderr]    Compiling jobsteal v0.5.1
[INFO] [stderr]    Compiling error-chain v0.7.1
[INFO] [stderr]    Compiling kmer-counter v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/kmer_tree.rs:42:24
[INFO] [stderr]    |
[INFO] [stderr] 42 |         while let Some(mut count) = self.counts.get_mut(self.index) {
[INFO] [stderr]    |                        ----^^^^^
[INFO] [stderr]    |                        |
[INFO] [stderr]    |                        help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] error: linking with `cc` failed: exit code: 1
[INFO] [stderr]   |
[INFO] [stderr]   = note: "cc" "-Wl,--as-needed" "-Wl,-z,noexecstack" "-m64" "-L" "/opt/crater/rustup-home/toolchains/c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/opt/crater/target/debug/deps/kmer_counter-43ad54c2e74e756a.kmer_counter.7afj1ru1-cgu.0.rcgu.o" "/opt/crater/target/debug/deps/kmer_counter-43ad54c2e74e756a.kmer_counter.7afj1ru1-cgu.1.rcgu.o" "/opt/crater/target/debug/deps/kmer_counter-43ad54c2e74e756a.kmer_counter.7afj1ru1-cgu.10.rcgu.o" "/opt/crater/target/debug/deps/kmer_counter-43ad54c2e74e756a.kmer_counter.7afj1ru1-cgu.11.rcgu.o" "/opt/crater/target/debug/deps/kmer_counter-43ad54c2e74e756a.kmer_counter.7afj1ru1-cgu.12.rcgu.o" "/opt/crater/target/debug/deps/kmer_counter-43ad54c2e74e756a.kmer_counter.7afj1ru1-cgu.13.rcgu.o" "/opt/crater/target/debug/deps/kmer_counter-43ad54c2e74e756a.kmer_counter.7afj1ru1-cgu.14.rcgu.o" "/opt/crater/target/debug/deps/kmer_counter-43ad54c2e74e756a.kmer_counter.7afj1ru1-cgu.15.rcgu.o" "/opt/crater/target/debug/deps/kmer_counter-43ad54c2e74e756a.kmer_counter.7afj1ru1-cgu.2.rcgu.o" "/opt/crater/target/debug/deps/kmer_counter-43ad54c2e74e756a.kmer_counter.7afj1ru1-cgu.3.rcgu.o" "/opt/crater/target/debug/deps/kmer_counter-43ad54c2e74e756a.kmer_counter.7afj1ru1-cgu.4.rcgu.o" "/opt/crater/target/debug/deps/kmer_counter-43ad54c2e74e756a.kmer_counter.7afj1ru1-cgu.5.rcgu.o" "/opt/crater/target/debug/deps/kmer_counter-43ad54c2e74e756a.kmer_counter.7afj1ru1-cgu.6.rcgu.o" "/opt/crater/target/debug/deps/kmer_counter-43ad54c2e74e756a.kmer_counter.7afj1ru1-cgu.7.rcgu.o" "/opt/crater/target/debug/deps/kmer_counter-43ad54c2e74e756a.kmer_counter.7afj1ru1-cgu.8.rcgu.o" "/opt/crater/target/debug/deps/kmer_counter-43ad54c2e74e756a.kmer_counter.7afj1ru1-cgu.9.rcgu.o" "-o" "/opt/crater/target/debug/deps/kmer_counter-43ad54c2e74e756a" "/opt/crater/target/debug/deps/kmer_counter-43ad54c2e74e756a.1vg0zbojh5wmvyw2.rcgu.o" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/crater/target/debug/deps" "-L" "/opt/crater/rustup-home/toolchains/c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/crater/target/debug/deps/liberror_chain-2ebcfaf072d7e088.rlib" "/opt/crater/target/debug/deps/libbacktrace-3c34a29d141e8c62.rlib" "/opt/crater/target/debug/deps/libbacktrace_sys-d92a675a37f0d83f.rlib" "/opt/crater/target/debug/deps/librustc_demangle-bedd9530c131cc28.rlib" "/opt/crater/target/debug/deps/libcfg_if-093b3a73669c0adf.rlib" "/opt/crater/target/debug/deps/libdbghelp-b3513b10232833cd.rlib" "/opt/crater/target/debug/deps/libwinapi-7dff080b6462bfe0.rlib" "/opt/crater/target/debug/deps/libkernel32-9b717afd956943fe.rlib" "/opt/crater/target/debug/deps/libenv_logger-c6af5efd800f43a0.rlib" "/opt/crater/target/debug/deps/libregex-b338243fc957247b.rlib" "/opt/crater/target/debug/deps/libutf8_ranges-ad1dc04e0493bd3b.rlib" "/opt/crater/target/debug/deps/libregex_syntax-a441907bce371315.rlib" "/opt/crater/target/debug/deps/libthread_local-04688b18fff73c12.rlib" "/opt/crater/target/debug/deps/libthread_id-c83461a8d22b2d2e.rlib" "/opt/crater/target/debug/deps/libaho_corasick-568da6c0272c48cd.rlib" "/opt/crater/target/debug/deps/liblog-290a6fa2618b6de5.rlib" "/opt/crater/target/debug/deps/libjobsteal-ef69dba259bbeac4.rlib" "/opt/crater/target/debug/deps/librand-755380576af1f105.rlib" "/opt/crater/target/debug/deps/libcrossbeam-c61a9b0f27a2d7f4.rlib" "/opt/crater/target/debug/deps/libmemchr-708c76b5a3625494.rlib" "/opt/crater/target/debug/deps/libmemmap-396c557b74d40918.rlib" "/opt/crater/target/debug/deps/libclap-3f9bd640c99671be.rlib" "/opt/crater/target/debug/deps/libunicode_segmentation-7a13c80eb69e5d55.rlib" "/opt/crater/target/debug/deps/libterm_size-a801e6b772628f96.rlib" "/opt/crater/target/debug/deps/libvec_map-e67e583fa42d507e.rlib" "/opt/crater/target/debug/deps/libbitflags-a08c32e0d1827ba5.rlib" "/opt/crater/target/debug/deps/libunicode_width-448dbe6739a68f6d.rlib" "/opt/crater/target/debug/deps/liblibc-7d34013f2ad77983.rlib" "/opt/crater/target/debug/deps/libansi_term-3e2b641b0e421fc3.rlib" "/opt/crater/target/debug/deps/libstrsim-fcca96e7cfbfd57d.rlib" "-Wl,--start-group" "/opt/crater/rustup-home/toolchains/c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-8469d768695d9748.rlib" "/opt/crater/rustup-home/toolchains/c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-786c0f406992159b.rlib" "/opt/crater/rustup-home/toolchains/c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/libbacktrace_sys-eda54ffd3e6402cc.rlib" "/opt/crater/rustup-home/toolchains/c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-3b59adbc83c396a4.rlib" "/opt/crater/rustup-home/toolchains/c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-1d2bb09f4dcbd4be.rlib" "/opt/crater/rustup-home/toolchains/c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-e96acda46b77a2fd.rlib" "/opt/crater/rustup-home/toolchains/c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-596074f575b1f832.rlib" "/opt/crater/rustup-home/toolchains/c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-57f280c1596673cd.rlib" "/opt/crater/rustup-home/toolchains/c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-16132b5b2ecf9ec1.rlib" "-Wl,--end-group" "/opt/crater/rustup-home/toolchains/c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-37286a0a9c4289ff.rlib" "-Wl,-Bdynamic" "-lutil" "-ldl" "-lrt" "-lpthread" "-lgcc_s" "-lc" "-lm" "-lrt" "-lpthread" "-lutil" "-lutil"
[INFO] [stderr]   = note: /opt/crater/target/debug/deps/libbacktrace-3c34a29d141e8c62.rlib(backtrace-3c34a29d141e8c62.backtrace.dx93otrw-cgu.12.rcgu.o): In function `backtrace::symbolize::libbacktrace::init_state::{{closure}}':
[INFO] [stderr]           /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.0/src/symbolize/libbacktrace.rs:156: undefined reference to `backtrace_create_state'
[INFO] [stderr]           /opt/crater/target/debug/deps/libbacktrace-3c34a29d141e8c62.rlib(backtrace-3c34a29d141e8c62.backtrace.dx93otrw-cgu.12.rcgu.o): In function `backtrace::symbolize::libbacktrace::resolve':
[INFO] [stderr]           /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.0/src/symbolize/libbacktrace.rs:173: undefined reference to `backtrace_pcinfo'
[INFO] [stderr]           /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.0/src/symbolize/libbacktrace.rs:177: undefined reference to `backtrace_syminfo'
[INFO] [stderr]           collect2: error: ld returned 1 exit status
[INFO] [stderr]           
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `kmer-counter`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "3e7a319e5ea46b83edfca9c428ef894b8c877a411d421a82a038ce33e9dcd17a"`
[INFO] running `"docker" "rm" "-f" "3e7a319e5ea46b83edfca9c428ef894b8c877a411d421a82a038ce33e9dcd17a"`
[INFO] [stdout] 3e7a319e5ea46b83edfca9c428ef894b8c877a411d421a82a038ce33e9dcd17a