[INFO] cloning repository https://github.com/mingyli/aoc2019
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mingyli/aoc2019" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmingyli%2Faoc2019", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmingyli%2Faoc2019'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f5eb17177232e4255e5fc9424bdb800067b2a705
[INFO] checking mingyli/aoc2019 against master#f00b02e6bbe63707503f058fb87cc3e2b25991ac for pr-125596
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmingyli%2Faoc2019" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mingyli/aoc2019 on toolchain f00b02e6bbe63707503f058fb87cc3e2b25991ac
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f00b02e6bbe63707503f058fb87cc3e2b25991ac" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mingyli/aoc2019
[INFO] finished tweaking git repo https://github.com/mingyli/aoc2019
[INFO] tweaked toml for git repo https://github.com/mingyli/aoc2019 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/mingyli/aoc2019 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" "+f00b02e6bbe63707503f058fb87cc3e2b25991ac" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: failed to select a version for `version_check`.
[INFO] [stderr]     ... required by package `ahash v0.8.6`
[INFO] [stderr]     ... which satisfies dependency `ahash = "^0.8.6"` of package `hashbrown v0.14.3`
[INFO] [stderr]     ... which satisfies dependency `hashbrown = "^0.14.3"` 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 `aoc2019 v0.1.0 (/workspace/builds/worker-4-tc1/source)`
[INFO] [stderr] versions that meet the requirements `^0.9.4` are: 0.9.4
[INFO] [stderr] 
[INFO] [stderr] all possible versions conflict with previously selected packages.
[INFO] [stderr] 
[INFO] [stderr]   previously selected package `version_check v0.9.1`
[INFO] [stderr]     ... which satisfies dependency `version_check = "^0.9"` (locked to 0.9.1) of package `im v14.0.0`
[INFO] [stderr]     ... which satisfies dependency `im = "^14.0.0"` (locked to 14.0.0) of package `aoc2019 v0.1.0 (/workspace/builds/worker-4-tc1/source)`
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `version_check` which could resolve this conflict
[ERROR] this task or one of its parent failed!
[ERROR] command failed: exit status: 101
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] checking mingyli/aoc2019 against try#c57a122e6bc7d3e243f3b2a000b6916cb51ef149 for pr-125596
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmingyli%2Faoc2019" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mingyli/aoc2019 on toolchain c57a122e6bc7d3e243f3b2a000b6916cb51ef149
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c57a122e6bc7d3e243f3b2a000b6916cb51ef149" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mingyli/aoc2019
[INFO] finished tweaking git repo https://github.com/mingyli/aoc2019
[INFO] tweaked toml for git repo https://github.com/mingyli/aoc2019 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/mingyli/aoc2019 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" "+c57a122e6bc7d3e243f3b2a000b6916cb51ef149" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: failed to select a version for `version_check`.
[INFO] [stderr]     ... required by package `ahash v0.8.6`
[INFO] [stderr]     ... which satisfies dependency `ahash = "^0.8.6"` of package `hashbrown v0.14.3`
[INFO] [stderr]     ... which satisfies dependency `hashbrown = "^0.14.3"` 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 `aoc2019 v0.1.0 (/workspace/builds/worker-4-tc2/source)`
[INFO] [stderr] versions that meet the requirements `^0.9.4` are: 0.9.4
[INFO] [stderr] 
[INFO] [stderr] all possible versions conflict with previously selected packages.
[INFO] [stderr] 
[INFO] [stderr]   previously selected package `version_check v0.9.1`
[INFO] [stderr]     ... which satisfies dependency `version_check = "^0.9"` (locked to 0.9.1) of package `im v14.0.0`
[INFO] [stderr]     ... which satisfies dependency `im = "^14.0.0"` (locked to 14.0.0) of package `aoc2019 v0.1.0 (/workspace/builds/worker-4-tc2/source)`
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `version_check` which could resolve this conflict
[INFO] checking mingyli/aoc2019 against try#c57a122e6bc7d3e243f3b2a000b6916cb51ef149 for pr-125596
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmingyli%2Faoc2019" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mingyli/aoc2019 on toolchain c57a122e6bc7d3e243f3b2a000b6916cb51ef149
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c57a122e6bc7d3e243f3b2a000b6916cb51ef149" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mingyli/aoc2019
[INFO] finished tweaking git repo https://github.com/mingyli/aoc2019
[INFO] tweaked toml for git repo https://github.com/mingyli/aoc2019 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/mingyli/aoc2019 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" "+c57a122e6bc7d3e243f3b2a000b6916cb51ef149" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: failed to select a version for `version_check`.
[INFO] [stderr]     ... required by package `ahash v0.8.6`
[INFO] [stderr]     ... which satisfies dependency `ahash = "^0.8.6"` of package `hashbrown v0.14.3`
[INFO] [stderr]     ... which satisfies dependency `hashbrown = "^0.14.3"` 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 `aoc2019 v0.1.0 (/workspace/builds/worker-4-tc2/source)`
[INFO] [stderr] versions that meet the requirements `^0.9.4` are: 0.9.4
[INFO] [stderr] 
[INFO] [stderr] all possible versions conflict with previously selected packages.
[INFO] [stderr] 
[INFO] [stderr]   previously selected package `version_check v0.9.1`
[INFO] [stderr]     ... which satisfies dependency `version_check = "^0.9"` (locked to 0.9.1) of package `im v14.0.0`
[INFO] [stderr]     ... which satisfies dependency `im = "^14.0.0"` (locked to 14.0.0) of package `aoc2019 v0.1.0 (/workspace/builds/worker-4-tc2/source)`
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `version_check` which could resolve this conflict
[INFO] checking mingyli/aoc2019 against try#c57a122e6bc7d3e243f3b2a000b6916cb51ef149 for pr-125596
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmingyli%2Faoc2019" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mingyli/aoc2019 on toolchain c57a122e6bc7d3e243f3b2a000b6916cb51ef149
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c57a122e6bc7d3e243f3b2a000b6916cb51ef149" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mingyli/aoc2019
[INFO] finished tweaking git repo https://github.com/mingyli/aoc2019
[INFO] tweaked toml for git repo https://github.com/mingyli/aoc2019 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/mingyli/aoc2019 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" "+c57a122e6bc7d3e243f3b2a000b6916cb51ef149" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: failed to select a version for `version_check`.
[INFO] [stderr]     ... required by package `ahash v0.8.6`
[INFO] [stderr]     ... which satisfies dependency `ahash = "^0.8.6"` of package `hashbrown v0.14.3`
[INFO] [stderr]     ... which satisfies dependency `hashbrown = "^0.14.3"` 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 `aoc2019 v0.1.0 (/workspace/builds/worker-4-tc2/source)`
[INFO] [stderr] versions that meet the requirements `^0.9.4` are: 0.9.4
[INFO] [stderr] 
[INFO] [stderr] all possible versions conflict with previously selected packages.
[INFO] [stderr] 
[INFO] [stderr]   previously selected package `version_check v0.9.1`
[INFO] [stderr]     ... which satisfies dependency `version_check = "^0.9"` (locked to 0.9.1) of package `im v14.0.0`
[INFO] [stderr]     ... which satisfies dependency `im = "^14.0.0"` (locked to 14.0.0) of package `aoc2019 v0.1.0 (/workspace/builds/worker-4-tc2/source)`
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `version_check` which could resolve this conflict
[INFO] checking mingyli/aoc2019 against try#c57a122e6bc7d3e243f3b2a000b6916cb51ef149 for pr-125596
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmingyli%2Faoc2019" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mingyli/aoc2019 on toolchain c57a122e6bc7d3e243f3b2a000b6916cb51ef149
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c57a122e6bc7d3e243f3b2a000b6916cb51ef149" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mingyli/aoc2019
[INFO] finished tweaking git repo https://github.com/mingyli/aoc2019
[INFO] tweaked toml for git repo https://github.com/mingyli/aoc2019 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/mingyli/aoc2019 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" "+c57a122e6bc7d3e243f3b2a000b6916cb51ef149" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: failed to select a version for `version_check`.
[INFO] [stderr]     ... required by package `ahash v0.8.6`
[INFO] [stderr]     ... which satisfies dependency `ahash = "^0.8.6"` of package `hashbrown v0.14.3`
[INFO] [stderr]     ... which satisfies dependency `hashbrown = "^0.14.3"` 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 `aoc2019 v0.1.0 (/workspace/builds/worker-4-tc2/source)`
[INFO] [stderr] versions that meet the requirements `^0.9.4` are: 0.9.4
[INFO] [stderr] 
[INFO] [stderr] all possible versions conflict with previously selected packages.
[INFO] [stderr] 
[INFO] [stderr]   previously selected package `version_check v0.9.1`
[INFO] [stderr]     ... which satisfies dependency `version_check = "^0.9"` (locked to 0.9.1) of package `im v14.0.0`
[INFO] [stderr]     ... which satisfies dependency `im = "^14.0.0"` (locked to 14.0.0) of package `aoc2019 v0.1.0 (/workspace/builds/worker-4-tc2/source)`
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `version_check` which could resolve this conflict
[INFO] checking mingyli/aoc2019 against try#c57a122e6bc7d3e243f3b2a000b6916cb51ef149 for pr-125596
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmingyli%2Faoc2019" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mingyli/aoc2019 on toolchain c57a122e6bc7d3e243f3b2a000b6916cb51ef149
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c57a122e6bc7d3e243f3b2a000b6916cb51ef149" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mingyli/aoc2019
[INFO] finished tweaking git repo https://github.com/mingyli/aoc2019
[INFO] tweaked toml for git repo https://github.com/mingyli/aoc2019 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/mingyli/aoc2019 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" "+c57a122e6bc7d3e243f3b2a000b6916cb51ef149" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: failed to select a version for `version_check`.
[INFO] [stderr]     ... required by package `ahash v0.8.6`
[INFO] [stderr]     ... which satisfies dependency `ahash = "^0.8.6"` of package `hashbrown v0.14.3`
[INFO] [stderr]     ... which satisfies dependency `hashbrown = "^0.14.3"` 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 `aoc2019 v0.1.0 (/workspace/builds/worker-4-tc2/source)`
[INFO] [stderr] versions that meet the requirements `^0.9.4` are: 0.9.4
[INFO] [stderr] 
[INFO] [stderr] all possible versions conflict with previously selected packages.
[INFO] [stderr] 
[INFO] [stderr]   previously selected package `version_check v0.9.1`
[INFO] [stderr]     ... which satisfies dependency `version_check = "^0.9"` (locked to 0.9.1) of package `im v14.0.0`
[INFO] [stderr]     ... which satisfies dependency `im = "^14.0.0"` (locked to 14.0.0) of package `aoc2019 v0.1.0 (/workspace/builds/worker-4-tc2/source)`
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `version_check` which could resolve this conflict
[ERROR] this task or one of its parent failed!
[ERROR] command failed: exit status: 101
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.