[INFO] updating cached repository https://github.com/mkeeter/nmbr9-z3
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 103368b9cb2cfdff2d4cc1831a2946fbafbe58cf
[INFO] testing mkeeter/nmbr9-z3 against master#28742a1146f10a4f09369baad027a464acb7a766 for pr-71274
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmkeeter%2Fnmbr9-z3" "/workspace/builds/worker-5/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mkeeter/nmbr9-z3 on toolchain 28742a1146f10a4f09369baad027a464acb7a766
[INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/mkeeter/nmbr9-z3
[INFO] finished tweaking git repo https://github.com/mkeeter/nmbr9-z3
[INFO] tweaked toml for git repo https://github.com/mkeeter/nmbr9-z3 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/mkeeter/nmbr9-z3 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 57d5cbc97c1111bb78d4b73b1b6df0c7ae8d414c0b65fb6c48f4078d18e7d60f
[INFO] running `"docker" "start" "-a" "57d5cbc97c1111bb78d4b73b1b6df0c7ae8d414c0b65fb6c48f4078d18e7d60f"`
[INFO] [stderr]    Compiling libc v0.2.46
[INFO] [stderr]    Compiling cfg-if v0.1.6
[INFO] [stderr]    Compiling lazy_static v1.2.0
[INFO] [stderr]    Compiling either v1.5.0
[INFO] [stderr]    Compiling z3-sys v0.4.0 (https://github.com/prove-rs/z3.rs#b39aa9f8)
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand v0.6.4
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling crossbeam-utils v0.2.2
[INFO] [stderr]    Compiling log v0.4.6
[INFO] [stderr]    Compiling itertools v0.8.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.3.1
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling z3 v0.3.2 (https://github.com/prove-rs/z3.rs#b39aa9f8)
[INFO] [stderr]    Compiling crossbeam-deque v0.2.0
[INFO] [stderr]    Compiling rand_pcg v0.1.1
[INFO] [stderr]    Compiling num_cpus v1.9.0
[INFO] [stderr]    Compiling rand_os v0.1.1
[INFO] [stderr]    Compiling rayon-core v1.4.1
[INFO] [stderr]    Compiling rayon v1.0.3
[INFO] [stderr]    Compiling nmbr9-z3 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `t`
[INFO] [stderr]    --> src/main.rs:490:9
[INFO] [stderr]     |
[INFO] [stderr] 490 |     for t in targets {
[INFO] [stderr]     |         ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/main.rs:505:9
[INFO] [stderr]     |
[INFO] [stderr] 505 |     for i in 0..10 {
[INFO] [stderr]     |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `k`
[INFO] [stderr]    --> src/main.rs:176:17
[INFO] [stderr]     |
[INFO] [stderr] 176 |             for k in 0..(i % 3) {
[INFO] [stderr]     |                 ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `most_pieces`
[INFO] [stderr]    --> src/main.rs:262:13
[INFO] [stderr]     |
[INFO] [stderr] 262 |         let most_pieces = self.0.iter().map(|v| v.len()).max().unwrap_or(0);
[INFO] [stderr]     |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_most_pieces`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:472:9
[INFO] [stderr]     |
[INFO] [stderr] 472 |     let mut base = (1..(3 as usize).pow(5))
[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] warning: method is never used: `as_u128`
[INFO] [stderr]    --> src/main.rs:185:5
[INFO] [stderr]     |
[INFO] [stderr] 185 |     fn as_u128(&self) -> u128 {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` 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/rustwide/rustup-home/toolchains/28742a1146f10a4f09369baad027a464acb7a766/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/opt/rustwide/target/debug/deps/nmbr9_z3-9d9293479e1eff02.nmbr9_z3.513hr35x-cgu.0.rcgu.o" "/opt/rustwide/target/debug/deps/nmbr9_z3-9d9293479e1eff02.nmbr9_z3.513hr35x-cgu.1.rcgu.o" "/opt/rustwide/target/debug/deps/nmbr9_z3-9d9293479e1eff02.nmbr9_z3.513hr35x-cgu.10.rcgu.o" "/opt/rustwide/target/debug/deps/nmbr9_z3-9d9293479e1eff02.nmbr9_z3.513hr35x-cgu.11.rcgu.o" "/opt/rustwide/target/debug/deps/nmbr9_z3-9d9293479e1eff02.nmbr9_z3.513hr35x-cgu.12.rcgu.o" "/opt/rustwide/target/debug/deps/nmbr9_z3-9d9293479e1eff02.nmbr9_z3.513hr35x-cgu.13.rcgu.o" "/opt/rustwide/target/debug/deps/nmbr9_z3-9d9293479e1eff02.nmbr9_z3.513hr35x-cgu.14.rcgu.o" "/opt/rustwide/target/debug/deps/nmbr9_z3-9d9293479e1eff02.nmbr9_z3.513hr35x-cgu.15.rcgu.o" "/opt/rustwide/target/debug/deps/nmbr9_z3-9d9293479e1eff02.nmbr9_z3.513hr35x-cgu.2.rcgu.o" "/opt/rustwide/target/debug/deps/nmbr9_z3-9d9293479e1eff02.nmbr9_z3.513hr35x-cgu.3.rcgu.o" "/opt/rustwide/target/debug/deps/nmbr9_z3-9d9293479e1eff02.nmbr9_z3.513hr35x-cgu.4.rcgu.o" "/opt/rustwide/target/debug/deps/nmbr9_z3-9d9293479e1eff02.nmbr9_z3.513hr35x-cgu.5.rcgu.o" "/opt/rustwide/target/debug/deps/nmbr9_z3-9d9293479e1eff02.nmbr9_z3.513hr35x-cgu.6.rcgu.o" "/opt/rustwide/target/debug/deps/nmbr9_z3-9d9293479e1eff02.nmbr9_z3.513hr35x-cgu.7.rcgu.o" "/opt/rustwide/target/debug/deps/nmbr9_z3-9d9293479e1eff02.nmbr9_z3.513hr35x-cgu.8.rcgu.o" "/opt/rustwide/target/debug/deps/nmbr9_z3-9d9293479e1eff02.nmbr9_z3.513hr35x-cgu.9.rcgu.o" "-o" "/opt/rustwide/target/debug/deps/nmbr9_z3-9d9293479e1eff02" "/opt/rustwide/target/debug/deps/nmbr9_z3-9d9293479e1eff02.2g7smhrslilm8lyh.rcgu.o" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/rustwide/target/debug/deps" "-L" "/opt/rustwide/rustup-home/toolchains/28742a1146f10a4f09369baad027a464acb7a766/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/rustwide/target/debug/deps/librayon-faba951bdc0f9ee1.rlib" "/opt/rustwide/target/debug/deps/libeither-f0fd9770610f99a4.rlib" "/opt/rustwide/target/debug/deps/librayon_core-8ed9019634dcb4d5.rlib" "/opt/rustwide/target/debug/deps/libnum_cpus-4bc04c4daa9a87b6.rlib" "/opt/rustwide/target/debug/deps/libcrossbeam_deque-cdd0d5f450c78449.rlib" "/opt/rustwide/target/debug/deps/libcrossbeam_epoch-4879a09813867889.rlib" "/opt/rustwide/target/debug/deps/libscopeguard-cdc96b1565ef7813.rlib" "/opt/rustwide/target/debug/deps/libmemoffset-2f7a16698471d162.rlib" "/opt/rustwide/target/debug/deps/libcrossbeam_utils-6ddefb977ef2ad2a.rlib" "/opt/rustwide/target/debug/deps/libarrayvec-48d4fd917b56c6d9.rlib" "/opt/rustwide/target/debug/deps/libnodrop-ad412c52a0ba129d.rlib" "/opt/rustwide/target/debug/deps/librand-73d5fd27cbe3da4c.rlib" "/opt/rustwide/target/debug/deps/librand_xorshift-7325ec311e19361c.rlib" "/opt/rustwide/target/debug/deps/librand_pcg-9d3e89e52b934814.rlib" "/opt/rustwide/target/debug/deps/librand_hc-aeb2dbfc1f9ce0db.rlib" "/opt/rustwide/target/debug/deps/librand_chacha-aae8c04d628b5c2a.rlib" "/opt/rustwide/target/debug/deps/librand_isaac-691528c1fdb23538.rlib" "/opt/rustwide/target/debug/deps/librand_os-71aef1c9fcc240ba.rlib" "/opt/rustwide/target/debug/deps/liblibc-6dfff79b23d6b060.rlib" "/opt/rustwide/target/debug/deps/librand_core-2a434c6b90773898.rlib" "/opt/rustwide/target/debug/deps/libz3-c352e07ea2498126.rlib" "/opt/rustwide/target/debug/deps/libz3_sys-da02dfcfb6deded4.rlib" "/opt/rustwide/target/debug/deps/liblazy_static-9da339be0fbe21d2.rlib" "/opt/rustwide/target/debug/deps/liblog-a7c74608573653b4.rlib" "/opt/rustwide/target/debug/deps/libcfg_if-702a35f6f0733ae2.rlib" "-Wl,--start-group" "/opt/rustwide/rustup-home/toolchains/28742a1146f10a4f09369baad027a464acb7a766/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-1dac1a412c98f50d.rlib" "/opt/rustwide/rustup-home/toolchains/28742a1146f10a4f09369baad027a464acb7a766/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-b7841fd014bf83a1.rlib" "/opt/rustwide/rustup-home/toolchains/28742a1146f10a4f09369baad027a464acb7a766/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-338c0763450dca22.rlib" "/opt/rustwide/rustup-home/toolchains/28742a1146f10a4f09369baad027a464acb7a766/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-5f2e5d11836e0967.rlib" "/opt/rustwide/rustup-home/toolchains/28742a1146f10a4f09369baad027a464acb7a766/lib/rustlib/x86_64-unknown-linux-gnu/lib/libbacktrace-81a9070bd3553adf.rlib" "/opt/rustwide/rustup-home/toolchains/28742a1146f10a4f09369baad027a464acb7a766/lib/rustlib/x86_64-unknown-linux-gnu/lib/libbacktrace_sys-e297830377b95af4.rlib" "/opt/rustwide/rustup-home/toolchains/28742a1146f10a4f09369baad027a464acb7a766/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-b38b87f2dd197fa0.rlib" "/opt/rustwide/rustup-home/toolchains/28742a1146f10a4f09369baad027a464acb7a766/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-601015f2e15e7e26.rlib" "/opt/rustwide/rustup-home/toolchains/28742a1146f10a4f09369baad027a464acb7a766/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-439f3a589bd88586.rlib" "/opt/rustwide/rustup-home/toolchains/28742a1146f10a4f09369baad027a464acb7a766/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-57ab7e6ac23ce11f.rlib" "/opt/rustwide/rustup-home/toolchains/28742a1146f10a4f09369baad027a464acb7a766/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-3aec7f88778e912a.rlib" "/opt/rustwide/rustup-home/toolchains/28742a1146f10a4f09369baad027a464acb7a766/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-b6806800b307d4b9.rlib" "/opt/rustwide/rustup-home/toolchains/28742a1146f10a4f09369baad027a464acb7a766/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-e49d7651b12f7563.rlib" "-Wl,--end-group" "/opt/rustwide/rustup-home/toolchains/28742a1146f10a4f09369baad027a464acb7a766/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-e8266574e26adcc3.rlib" "-Wl,-Bdynamic" "-lutil" "-lutil" "-lz3" "-ldl" "-lrt" "-lpthread" "-lgcc_s" "-lc" "-lm" "-lrt" "-lpthread" "-lutil" "-ldl" "-lutil"
[INFO] [stderr]   = note: /usr/bin/ld: cannot find -lz3
[INFO] [stderr]           collect2: error: ld returned 1 exit status
[INFO] [stderr]           
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error; 6 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] error: could not compile `nmbr9-z3`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "57d5cbc97c1111bb78d4b73b1b6df0c7ae8d414c0b65fb6c48f4078d18e7d60f"`
[INFO] running `"docker" "rm" "-f" "57d5cbc97c1111bb78d4b73b1b6df0c7ae8d414c0b65fb6c48f4078d18e7d60f"`
[INFO] [stdout] 57d5cbc97c1111bb78d4b73b1b6df0c7ae8d414c0b65fb6c48f4078d18e7d60f