[INFO] updating cached repository mmueller/advent2016
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/mmueller/advent2016
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/mmueller/advent2016" "work/ex/beta-1.37-6/sources/1.36.0/gh/mmueller/advent2016"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/mmueller/advent2016'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/mmueller/advent2016" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/mmueller/advent2016"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/mmueller/advent2016'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ae140beb832ff98fd285c54d7100d9835c2399a1
[INFO] sha for GitHub repo mmueller/advent2016: ae140beb832ff98fd285c54d7100d9835c2399a1
[INFO] validating manifest of mmueller/advent2016 on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of mmueller/advent2016 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing mmueller/advent2016
[INFO] finished frobbing mmueller/advent2016
[INFO] frobbed toml for mmueller/advent2016 written to work/ex/beta-1.37-6/sources/1.36.0/gh/mmueller/advent2016/Cargo.toml
[INFO] started frobbing mmueller/advent2016
[INFO] finished frobbing mmueller/advent2016
[INFO] frobbed toml for mmueller/advent2016 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/mmueller/advent2016/Cargo.toml
[INFO] crate mmueller/advent2016 already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "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] testing mmueller/advent2016 against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/mmueller/advent2016:/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=warn" "-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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 43fbb4e43e79ec9a3113b05be108dd0c3ac63fd7b1dc7627e8dfa0b262733c35
[INFO] running `"docker" "start" "-a" "43fbb4e43e79ec9a3113b05be108dd0c3ac63fd7b1dc7627e8dfa0b262733c35"`
[INFO] [stderr]    Compiling gcc v0.3.39
[INFO] [stderr]    Compiling backtrace v0.3.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.5
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]    Compiling error-chain v0.7.1
[INFO] [stderr]    Compiling advent2016 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning[E0503]: cannot use `day` because it was mutably borrowed
[INFO] [stderr]   --> src/main.rs:34:9
[INFO] [stderr]    |
[INFO] [stderr] 29 |     parser.refer(&mut day)
[INFO] [stderr]    |                  -------- borrow of `day` occurs here
[INFO] [stderr] ...
[INFO] [stderr] 34 |         Some(1) => day1::day1(),
[INFO] [stderr]    |         ^^^^^^^ use of borrowed `day`
[INFO] [stderr] ...
[INFO] [stderr] 62 | }
[INFO] [stderr]    | - borrow might be used here, when `parser` is dropped and runs the destructor for type `argparse::ArgumentParser<'_>`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[INFO] [stderr]    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[INFO] [stderr] 
[INFO] [stderr] warning[E0503]: cannot use `day.0` because it was mutably borrowed
[INFO] [stderr]   --> src/main.rs:34:14
[INFO] [stderr]    |
[INFO] [stderr] 29 |     parser.refer(&mut day)
[INFO] [stderr]    |                  -------- borrow of `day` occurs here
[INFO] [stderr] ...
[INFO] [stderr] 34 |         Some(1) => day1::day1(),
[INFO] [stderr]    |              ^ use of borrowed `day`
[INFO] [stderr] ...
[INFO] [stderr] 62 | }
[INFO] [stderr]    | - borrow might be used here, when `parser` is dropped and runs the destructor for type `argparse::ArgumentParser<'_>`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[INFO] [stderr]    = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[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/1.36.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/opt/crater/target/debug/deps/advent2016-eadbf9dbe1bb6cfa.advent2016.d2r7yfe2-cgu.0.rcgu.o" "/opt/crater/target/debug/deps/advent2016-eadbf9dbe1bb6cfa.advent2016.d2r7yfe2-cgu.1.rcgu.o" "/opt/crater/target/debug/deps/advent2016-eadbf9dbe1bb6cfa.advent2016.d2r7yfe2-cgu.10.rcgu.o" "/opt/crater/target/debug/deps/advent2016-eadbf9dbe1bb6cfa.advent2016.d2r7yfe2-cgu.11.rcgu.o" "/opt/crater/target/debug/deps/advent2016-eadbf9dbe1bb6cfa.advent2016.d2r7yfe2-cgu.12.rcgu.o" "/opt/crater/target/debug/deps/advent2016-eadbf9dbe1bb6cfa.advent2016.d2r7yfe2-cgu.13.rcgu.o" "/opt/crater/target/debug/deps/advent2016-eadbf9dbe1bb6cfa.advent2016.d2r7yfe2-cgu.14.rcgu.o" "/opt/crater/target/debug/deps/advent2016-eadbf9dbe1bb6cfa.advent2016.d2r7yfe2-cgu.15.rcgu.o" "/opt/crater/target/debug/deps/advent2016-eadbf9dbe1bb6cfa.advent2016.d2r7yfe2-cgu.2.rcgu.o" "/opt/crater/target/debug/deps/advent2016-eadbf9dbe1bb6cfa.advent2016.d2r7yfe2-cgu.3.rcgu.o" "/opt/crater/target/debug/deps/advent2016-eadbf9dbe1bb6cfa.advent2016.d2r7yfe2-cgu.4.rcgu.o" "/opt/crater/target/debug/deps/advent2016-eadbf9dbe1bb6cfa.advent2016.d2r7yfe2-cgu.5.rcgu.o" "/opt/crater/target/debug/deps/advent2016-eadbf9dbe1bb6cfa.advent2016.d2r7yfe2-cgu.6.rcgu.o" "/opt/crater/target/debug/deps/advent2016-eadbf9dbe1bb6cfa.advent2016.d2r7yfe2-cgu.7.rcgu.o" "/opt/crater/target/debug/deps/advent2016-eadbf9dbe1bb6cfa.advent2016.d2r7yfe2-cgu.8.rcgu.o" "/opt/crater/target/debug/deps/advent2016-eadbf9dbe1bb6cfa.advent2016.d2r7yfe2-cgu.9.rcgu.o" "-o" "/opt/crater/target/debug/deps/advent2016-eadbf9dbe1bb6cfa" "/opt/crater/target/debug/deps/advent2016-eadbf9dbe1bb6cfa.3d7pylbwxk0973sd.rcgu.o" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/crater/target/debug/deps" "-L" "/opt/crater/target/debug/build/rust-crypto-56d0f4ff3afe436c/out" "-L" "/opt/crater/rustup-home/toolchains/1.36.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/crater/target/debug/deps/libregex-9b79d6a2beb4499b.rlib" "/opt/crater/target/debug/deps/libutf8_ranges-00f0fc1fcb3347d8.rlib" "/opt/crater/target/debug/deps/libregex_syntax-5f2e8797984afb68.rlib" "/opt/crater/target/debug/deps/libthread_local-2215f3aa5e2f7974.rlib" "/opt/crater/target/debug/deps/libthread_id-b4a5f92c53f36d17.rlib" "/opt/crater/target/debug/deps/libaho_corasick-4afe7cdbc84761f3.rlib" "/opt/crater/target/debug/deps/libmemchr-a1270c1d7fb8c6ef.rlib" "/opt/crater/target/debug/deps/liblazy_static-d7718b504e03d468.rlib" "/opt/crater/target/debug/deps/liberror_chain-e4e73fa50fe73714.rlib" "/opt/crater/target/debug/deps/libbacktrace-bedfb41c1815ce3c.rlib" "/opt/crater/target/debug/deps/libbacktrace_sys-44a21dc39612b7f6.rlib" "/opt/crater/target/debug/deps/librustc_demangle-274c4da954efaa0a.rlib" "/opt/crater/target/debug/deps/libcfg_if-fcc9aff037f57c39.rlib" "/opt/crater/target/debug/deps/libdbghelp-4c5eeff50cd0cc4c.rlib" "/opt/crater/target/debug/deps/libwinapi-6779d1f046ce211b.rlib" "/opt/crater/target/debug/deps/libkernel32-579101ee9cfddddd.rlib" "/opt/crater/target/debug/deps/libcrypto-80f0d72b49588255.rlib" "/opt/crater/target/debug/deps/libtime-dce1fad28286ed01.rlib" "/opt/crater/target/debug/deps/librustc_serialize-68fa3d145533aa20.rlib" "/opt/crater/target/debug/deps/librand-5d489187a9b4c21e.rlib" "/opt/crater/target/debug/deps/liblibc-e444f8f33bb3c635.rlib" "/opt/crater/target/debug/deps/libargparse-795ae1138f8beafe.rlib" "-Wl,--start-group" "/opt/crater/rustup-home/toolchains/1.36.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-9895e8982b0a79e7.rlib" "/opt/crater/rustup-home/toolchains/1.36.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-57306b8ed3378a0e.rlib" "/opt/crater/rustup-home/toolchains/1.36.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libbacktrace_sys-54463ae5adae3649.rlib" "/opt/crater/rustup-home/toolchains/1.36.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-d99667b199a9875a.rlib" "/opt/crater/rustup-home/toolchains/1.36.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-51f4300e102199f5.rlib" "/opt/crater/rustup-home/toolchains/1.36.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-b3ccf1f7737a6a91.rlib" "/opt/crater/rustup-home/toolchains/1.36.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-157c37a3ceb78853.rlib" "/opt/crater/rustup-home/toolchains/1.36.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-505bcee45aafb736.rlib" "/opt/crater/rustup-home/toolchains/1.36.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-c29abd529ba4452b.rlib" "/opt/crater/rustup-home/toolchains/1.36.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-895383a3232f6572.rlib" "/opt/crater/rustup-home/toolchains/1.36.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-5594cb4f559bc761.rlib" "-Wl,--end-group" "/opt/crater/rustup-home/toolchains/1.36.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-38e90baf978bc428.rlib" "-Wl,-Bdynamic" "-lutil" "-ldl" "-lrt" "-lpthread" "-lgcc_s" "-lc" "-lm" "-lrt" "-lpthread" "-lutil" "-lutil"
[INFO] [stderr]   = note: /opt/crater/target/debug/deps/libbacktrace-bedfb41c1815ce3c.rlib(backtrace-bedfb41c1815ce3c.backtrace.3bnztzzb-cgu.5.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-bedfb41c1815ce3c.rlib(backtrace-bedfb41c1815ce3c.backtrace.3bnztzzb-cgu.5.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] For more information about this error, try `rustc --explain E0503`.
[INFO] [stderr] error: Could not compile `advent2016`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "43fbb4e43e79ec9a3113b05be108dd0c3ac63fd7b1dc7627e8dfa0b262733c35"`
[INFO] running `"docker" "rm" "-f" "43fbb4e43e79ec9a3113b05be108dd0c3ac63fd7b1dc7627e8dfa0b262733c35"`
[INFO] [stdout] 43fbb4e43e79ec9a3113b05be108dd0c3ac63fd7b1dc7627e8dfa0b262733c35