[INFO] cloning repository https://github.com/mingyli/aoc2018
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mingyli/aoc2018" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmingyli%2Faoc2018", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmingyli%2Faoc2018'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8394743f59b28ed059fbdb2947bca36df3dab36b
[INFO] checking mingyli/aoc2018 against try#f77b5bc6c7c84df104f86b0dd01d9490e3923fa8 for pr-147834
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmingyli%2Faoc2018" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/mingyli/aoc2018
[INFO] finished tweaking git repo https://github.com/mingyli/aoc2018
[INFO] tweaked toml for git repo https://github.com/mingyli/aoc2018 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mingyli/aoc2018 on toolchain f77b5bc6c7c84df104f86b0dd01d9490e3923fa8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f77b5bc6c7c84df104f86b0dd01d9490e3923fa8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/mingyli/aoc2018 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f77b5bc6c7c84df104f86b0dd01d9490e3923fa8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: failed to select a version for `libc`.
[INFO] [stderr]     ... required by package `gear-dlmalloc v0.1.4`
[INFO] [stderr]     ... which satisfies dependency `dlmalloc = "^0.1.4"` of package `galloc v1.0.2`
[INFO] [stderr]     ... which satisfies dependency `galloc = "^1.0.2"` of package `gstd v1.0.2`
[INFO] [stderr]     ... which satisfies dependency `gstd = "^1"` of package `io v0.0.2`
[INFO] [stderr]     ... which satisfies dependency `io = "^0.0.2"` (locked to 0.0.2) of package `aoc2018 v0.1.0 (/workspace/builds/worker-7-tc2/source)`
[INFO] [stderr] versions that meet the requirements `^0.2.101` are: 0.2.177, 0.2.176, 0.2.175, 0.2.174, 0.2.173, 0.2.172, 0.2.171, 0.2.170, 0.2.169, 0.2.168, 0.2.167, 0.2.166, 0.2.164, 0.2.163, 0.2.162, 0.2.161, 0.2.160, 0.2.159, 0.2.158, 0.2.157, 0.2.156, 0.2.155, 0.2.153, 0.2.152, 0.2.151, 0.2.150, 0.2.149, 0.2.148, 0.2.147, 0.2.146, 0.2.144, 0.2.143, 0.2.142, 0.2.141, 0.2.140, 0.2.139, 0.2.138, 0.2.137, 0.2.136, 0.2.135, 0.2.134, 0.2.133, 0.2.132, 0.2.131, 0.2.129, 0.2.127, 0.2.126, 0.2.125, 0.2.124, 0.2.123, 0.2.122, 0.2.121, 0.2.120, 0.2.119, 0.2.118, 0.2.117, 0.2.116, 0.2.115, 0.2.114, 0.2.113, 0.2.112, 0.2.111, 0.2.109, 0.2.108, 0.2.107, 0.2.106, 0.2.105, 0.2.104, 0.2.103, 0.2.102, 0.2.101
[INFO] [stderr] 
[INFO] [stderr] all possible versions conflict with previously selected packages.
[INFO] [stderr] 
[INFO] [stderr]   previously selected package `libc v0.2.66`
[INFO] [stderr]     ... which satisfies dependency `libc = "^0.2.1"` (locked to 0.2.66) of package `time v0.1.42`
[INFO] [stderr]     ... which satisfies dependency `time = "^0.1.39"` (locked to 0.1.42) of package `chrono v0.4.10`
[INFO] [stderr]     ... which satisfies dependency `chrono = "^0.4.10"` (locked to 0.4.10) of package `aoc2018 v0.1.0 (/workspace/builds/worker-7-tc2/source)`
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `libc` which could resolve this conflict
[INFO] checking mingyli/aoc2018 against try#f77b5bc6c7c84df104f86b0dd01d9490e3923fa8 for pr-147834
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmingyli%2Faoc2018" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/mingyli/aoc2018
[INFO] finished tweaking git repo https://github.com/mingyli/aoc2018
[INFO] tweaked toml for git repo https://github.com/mingyli/aoc2018 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mingyli/aoc2018 on toolchain f77b5bc6c7c84df104f86b0dd01d9490e3923fa8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f77b5bc6c7c84df104f86b0dd01d9490e3923fa8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/mingyli/aoc2018 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f77b5bc6c7c84df104f86b0dd01d9490e3923fa8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: failed to select a version for `libc`.
[INFO] [stderr]     ... required by package `gear-dlmalloc v0.1.4`
[INFO] [stderr]     ... which satisfies dependency `dlmalloc = "^0.1.4"` of package `galloc v1.0.2`
[INFO] [stderr]     ... which satisfies dependency `galloc = "^1.0.2"` of package `gstd v1.0.2`
[INFO] [stderr]     ... which satisfies dependency `gstd = "^1"` of package `io v0.0.2`
[INFO] [stderr]     ... which satisfies dependency `io = "^0.0.2"` (locked to 0.0.2) of package `aoc2018 v0.1.0 (/workspace/builds/worker-7-tc2/source)`
[INFO] [stderr] versions that meet the requirements `^0.2.101` are: 0.2.177, 0.2.176, 0.2.175, 0.2.174, 0.2.173, 0.2.172, 0.2.171, 0.2.170, 0.2.169, 0.2.168, 0.2.167, 0.2.166, 0.2.164, 0.2.163, 0.2.162, 0.2.161, 0.2.160, 0.2.159, 0.2.158, 0.2.157, 0.2.156, 0.2.155, 0.2.153, 0.2.152, 0.2.151, 0.2.150, 0.2.149, 0.2.148, 0.2.147, 0.2.146, 0.2.144, 0.2.143, 0.2.142, 0.2.141, 0.2.140, 0.2.139, 0.2.138, 0.2.137, 0.2.136, 0.2.135, 0.2.134, 0.2.133, 0.2.132, 0.2.131, 0.2.129, 0.2.127, 0.2.126, 0.2.125, 0.2.124, 0.2.123, 0.2.122, 0.2.121, 0.2.120, 0.2.119, 0.2.118, 0.2.117, 0.2.116, 0.2.115, 0.2.114, 0.2.113, 0.2.112, 0.2.111, 0.2.109, 0.2.108, 0.2.107, 0.2.106, 0.2.105, 0.2.104, 0.2.103, 0.2.102, 0.2.101
[INFO] [stderr] 
[INFO] [stderr] all possible versions conflict with previously selected packages.
[INFO] [stderr] 
[INFO] [stderr]   previously selected package `libc v0.2.66`
[INFO] [stderr]     ... which satisfies dependency `libc = "^0.2.1"` (locked to 0.2.66) of package `time v0.1.42`
[INFO] [stderr]     ... which satisfies dependency `time = "^0.1.39"` (locked to 0.1.42) of package `chrono v0.4.10`
[INFO] [stderr]     ... which satisfies dependency `chrono = "^0.4.10"` (locked to 0.4.10) of package `aoc2018 v0.1.0 (/workspace/builds/worker-7-tc2/source)`
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `libc` which could resolve this conflict
[INFO] checking mingyli/aoc2018 against try#f77b5bc6c7c84df104f86b0dd01d9490e3923fa8 for pr-147834
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmingyli%2Faoc2018" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/mingyli/aoc2018
[INFO] finished tweaking git repo https://github.com/mingyli/aoc2018
[INFO] tweaked toml for git repo https://github.com/mingyli/aoc2018 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mingyli/aoc2018 on toolchain f77b5bc6c7c84df104f86b0dd01d9490e3923fa8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f77b5bc6c7c84df104f86b0dd01d9490e3923fa8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/mingyli/aoc2018 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f77b5bc6c7c84df104f86b0dd01d9490e3923fa8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: failed to select a version for `libc`.
[INFO] [stderr]     ... required by package `gear-dlmalloc v0.1.4`
[INFO] [stderr]     ... which satisfies dependency `dlmalloc = "^0.1.4"` of package `galloc v1.0.2`
[INFO] [stderr]     ... which satisfies dependency `galloc = "^1.0.2"` of package `gstd v1.0.2`
[INFO] [stderr]     ... which satisfies dependency `gstd = "^1"` of package `io v0.0.2`
[INFO] [stderr]     ... which satisfies dependency `io = "^0.0.2"` (locked to 0.0.2) of package `aoc2018 v0.1.0 (/workspace/builds/worker-7-tc2/source)`
[INFO] [stderr] versions that meet the requirements `^0.2.101` are: 0.2.177, 0.2.176, 0.2.175, 0.2.174, 0.2.173, 0.2.172, 0.2.171, 0.2.170, 0.2.169, 0.2.168, 0.2.167, 0.2.166, 0.2.164, 0.2.163, 0.2.162, 0.2.161, 0.2.160, 0.2.159, 0.2.158, 0.2.157, 0.2.156, 0.2.155, 0.2.153, 0.2.152, 0.2.151, 0.2.150, 0.2.149, 0.2.148, 0.2.147, 0.2.146, 0.2.144, 0.2.143, 0.2.142, 0.2.141, 0.2.140, 0.2.139, 0.2.138, 0.2.137, 0.2.136, 0.2.135, 0.2.134, 0.2.133, 0.2.132, 0.2.131, 0.2.129, 0.2.127, 0.2.126, 0.2.125, 0.2.124, 0.2.123, 0.2.122, 0.2.121, 0.2.120, 0.2.119, 0.2.118, 0.2.117, 0.2.116, 0.2.115, 0.2.114, 0.2.113, 0.2.112, 0.2.111, 0.2.109, 0.2.108, 0.2.107, 0.2.106, 0.2.105, 0.2.104, 0.2.103, 0.2.102, 0.2.101
[INFO] [stderr] 
[INFO] [stderr] all possible versions conflict with previously selected packages.
[INFO] [stderr] 
[INFO] [stderr]   previously selected package `libc v0.2.66`
[INFO] [stderr]     ... which satisfies dependency `libc = "^0.2.1"` (locked to 0.2.66) of package `time v0.1.42`
[INFO] [stderr]     ... which satisfies dependency `time = "^0.1.39"` (locked to 0.1.42) of package `chrono v0.4.10`
[INFO] [stderr]     ... which satisfies dependency `chrono = "^0.4.10"` (locked to 0.4.10) of package `aoc2018 v0.1.0 (/workspace/builds/worker-7-tc2/source)`
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `libc` which could resolve this conflict
[INFO] checking mingyli/aoc2018 against try#f77b5bc6c7c84df104f86b0dd01d9490e3923fa8 for pr-147834
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmingyli%2Faoc2018" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/mingyli/aoc2018
[INFO] finished tweaking git repo https://github.com/mingyli/aoc2018
[INFO] tweaked toml for git repo https://github.com/mingyli/aoc2018 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mingyli/aoc2018 on toolchain f77b5bc6c7c84df104f86b0dd01d9490e3923fa8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f77b5bc6c7c84df104f86b0dd01d9490e3923fa8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/mingyli/aoc2018 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f77b5bc6c7c84df104f86b0dd01d9490e3923fa8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: failed to select a version for `libc`.
[INFO] [stderr]     ... required by package `gear-dlmalloc v0.1.4`
[INFO] [stderr]     ... which satisfies dependency `dlmalloc = "^0.1.4"` of package `galloc v1.0.2`
[INFO] [stderr]     ... which satisfies dependency `galloc = "^1.0.2"` of package `gstd v1.0.2`
[INFO] [stderr]     ... which satisfies dependency `gstd = "^1"` of package `io v0.0.2`
[INFO] [stderr]     ... which satisfies dependency `io = "^0.0.2"` (locked to 0.0.2) of package `aoc2018 v0.1.0 (/workspace/builds/worker-7-tc2/source)`
[INFO] [stderr] versions that meet the requirements `^0.2.101` are: 0.2.177, 0.2.176, 0.2.175, 0.2.174, 0.2.173, 0.2.172, 0.2.171, 0.2.170, 0.2.169, 0.2.168, 0.2.167, 0.2.166, 0.2.164, 0.2.163, 0.2.162, 0.2.161, 0.2.160, 0.2.159, 0.2.158, 0.2.157, 0.2.156, 0.2.155, 0.2.153, 0.2.152, 0.2.151, 0.2.150, 0.2.149, 0.2.148, 0.2.147, 0.2.146, 0.2.144, 0.2.143, 0.2.142, 0.2.141, 0.2.140, 0.2.139, 0.2.138, 0.2.137, 0.2.136, 0.2.135, 0.2.134, 0.2.133, 0.2.132, 0.2.131, 0.2.129, 0.2.127, 0.2.126, 0.2.125, 0.2.124, 0.2.123, 0.2.122, 0.2.121, 0.2.120, 0.2.119, 0.2.118, 0.2.117, 0.2.116, 0.2.115, 0.2.114, 0.2.113, 0.2.112, 0.2.111, 0.2.109, 0.2.108, 0.2.107, 0.2.106, 0.2.105, 0.2.104, 0.2.103, 0.2.102, 0.2.101
[INFO] [stderr] 
[INFO] [stderr] all possible versions conflict with previously selected packages.
[INFO] [stderr] 
[INFO] [stderr]   previously selected package `libc v0.2.66`
[INFO] [stderr]     ... which satisfies dependency `libc = "^0.2.1"` (locked to 0.2.66) of package `time v0.1.42`
[INFO] [stderr]     ... which satisfies dependency `time = "^0.1.39"` (locked to 0.1.42) of package `chrono v0.4.10`
[INFO] [stderr]     ... which satisfies dependency `chrono = "^0.4.10"` (locked to 0.4.10) of package `aoc2018 v0.1.0 (/workspace/builds/worker-7-tc2/source)`
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `libc` which could resolve this conflict
[INFO] checking mingyli/aoc2018 against try#f77b5bc6c7c84df104f86b0dd01d9490e3923fa8 for pr-147834
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmingyli%2Faoc2018" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/mingyli/aoc2018
[INFO] finished tweaking git repo https://github.com/mingyli/aoc2018
[INFO] tweaked toml for git repo https://github.com/mingyli/aoc2018 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mingyli/aoc2018 on toolchain f77b5bc6c7c84df104f86b0dd01d9490e3923fa8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f77b5bc6c7c84df104f86b0dd01d9490e3923fa8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/mingyli/aoc2018 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f77b5bc6c7c84df104f86b0dd01d9490e3923fa8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: failed to select a version for `libc`.
[INFO] [stderr]     ... required by package `gear-dlmalloc v0.1.4`
[INFO] [stderr]     ... which satisfies dependency `dlmalloc = "^0.1.4"` of package `galloc v1.0.2`
[INFO] [stderr]     ... which satisfies dependency `galloc = "^1.0.2"` of package `gstd v1.0.2`
[INFO] [stderr]     ... which satisfies dependency `gstd = "^1"` of package `io v0.0.2`
[INFO] [stderr]     ... which satisfies dependency `io = "^0.0.2"` (locked to 0.0.2) of package `aoc2018 v0.1.0 (/workspace/builds/worker-7-tc2/source)`
[INFO] [stderr] versions that meet the requirements `^0.2.101` are: 0.2.177, 0.2.176, 0.2.175, 0.2.174, 0.2.173, 0.2.172, 0.2.171, 0.2.170, 0.2.169, 0.2.168, 0.2.167, 0.2.166, 0.2.164, 0.2.163, 0.2.162, 0.2.161, 0.2.160, 0.2.159, 0.2.158, 0.2.157, 0.2.156, 0.2.155, 0.2.153, 0.2.152, 0.2.151, 0.2.150, 0.2.149, 0.2.148, 0.2.147, 0.2.146, 0.2.144, 0.2.143, 0.2.142, 0.2.141, 0.2.140, 0.2.139, 0.2.138, 0.2.137, 0.2.136, 0.2.135, 0.2.134, 0.2.133, 0.2.132, 0.2.131, 0.2.129, 0.2.127, 0.2.126, 0.2.125, 0.2.124, 0.2.123, 0.2.122, 0.2.121, 0.2.120, 0.2.119, 0.2.118, 0.2.117, 0.2.116, 0.2.115, 0.2.114, 0.2.113, 0.2.112, 0.2.111, 0.2.109, 0.2.108, 0.2.107, 0.2.106, 0.2.105, 0.2.104, 0.2.103, 0.2.102, 0.2.101
[INFO] [stderr] 
[INFO] [stderr] all possible versions conflict with previously selected packages.
[INFO] [stderr] 
[INFO] [stderr]   previously selected package `libc v0.2.66`
[INFO] [stderr]     ... which satisfies dependency `libc = "^0.2.1"` (locked to 0.2.66) of package `time v0.1.42`
[INFO] [stderr]     ... which satisfies dependency `time = "^0.1.39"` (locked to 0.1.42) of package `chrono v0.4.10`
[INFO] [stderr]     ... which satisfies dependency `chrono = "^0.4.10"` (locked to 0.4.10) of package `aoc2018 v0.1.0 (/workspace/builds/worker-7-tc2/source)`
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `libc` which could resolve this conflict


command failed: exit status: 101

    Blocking waiting for file lock on package cache
    Updating crates.io index
error: failed to select a version for `libc`.
    ... required by package `gear-dlmalloc v0.1.4`
    ... which satisfies dependency `dlmalloc = "^0.1.4"` of package `galloc v1.0.2`
    ... which satisfies dependency `galloc = "^1.0.2"` of package `gstd v1.0.2`
    ... which satisfies dependency `gstd = "^1"` of package `io v0.0.2`
    ... which satisfies dependency `io = "^0.0.2"` (locked to 0.0.2) of package `aoc2018 v0.1.0 (/workspace/builds/worker-7-tc2/source)`
versions that meet the requirements `^0.2.101` are: 0.2.177, 0.2.176, 0.2.175, 0.2.174, 0.2.173, 0.2.172, 0.2.171, 0.2.170, 0.2.169, 0.2.168, 0.2.167, 0.2.166, 0.2.164, 0.2.163, 0.2.162, 0.2.161, 0.2.160, 0.2.159, 0.2.158, 0.2.157, 0.2.156, 0.2.155, 0.2.153, 0.2.152, 0.2.151, 0.2.150, 0.2.149, 0.2.148, 0.2.147, 0.2.146, 0.2.144, 0.2.143, 0.2.142, 0.2.141, 0.2.140, 0.2.139, 0.2.138, 0.2.137, 0.2.136, 0.2.135, 0.2.134, 0.2.133, 0.2.132, 0.2.131, 0.2.129, 0.2.127, 0.2.126, 0.2.125, 0.2.124, 0.2.123, 0.2.122, 0.2.121, 0.2.120, 0.2.119, 0.2.118, 0.2.117, 0.2.116, 0.2.115, 0.2.114, 0.2.113, 0.2.112, 0.2.111, 0.2.109, 0.2.108, 0.2.107, 0.2.106, 0.2.105, 0.2.104, 0.2.103, 0.2.102, 0.2.101

all possible versions conflict with previously selected packages.

  previously selected package `libc v0.2.66`
    ... which satisfies dependency `libc = "^0.2.1"` (locked to 0.2.66) of package `time v0.1.42`
    ... which satisfies dependency `time = "^0.1.39"` (locked to 0.1.42) of package `chrono v0.4.10`
    ... which satisfies dependency `chrono = "^0.4.10"` (locked to 0.4.10) of package `aoc2018 v0.1.0 (/workspace/builds/worker-7-tc2/source)`

failed to select a version for `libc` which could resolve this conflict