[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] testing mingyli/aoc2019 against try#28f95933dc0727396c07b48d0a8cb5211b7fb472 for pr-154065-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmingyli%2Faoc2019" "/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/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-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mingyli/aoc2019 on toolchain 28f95933dc0727396c07b48d0a8cb5211b7fb472
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+28f95933dc0727396c07b48d0a8cb5211b7fb472" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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" "+28f95933dc0727396c07b48d0a8cb5211b7fb472" "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-7-tc2/source)`
[INFO] [stderr] versions that meet the requirements `^0.9.4` are: 0.9.5, 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-7-tc2/source)`
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `version_check` which could resolve this conflict
[INFO] testing mingyli/aoc2019 against try#28f95933dc0727396c07b48d0a8cb5211b7fb472 for pr-154065-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmingyli%2Faoc2019" "/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/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-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mingyli/aoc2019 on toolchain 28f95933dc0727396c07b48d0a8cb5211b7fb472
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+28f95933dc0727396c07b48d0a8cb5211b7fb472" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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" "+28f95933dc0727396c07b48d0a8cb5211b7fb472" "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-7-tc2/source)`
[INFO] [stderr] versions that meet the requirements `^0.9.4` are: 0.9.5, 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-7-tc2/source)`
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `version_check` which could resolve this conflict
[INFO] testing mingyli/aoc2019 against try#28f95933dc0727396c07b48d0a8cb5211b7fb472 for pr-154065-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmingyli%2Faoc2019" "/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/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-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mingyli/aoc2019 on toolchain 28f95933dc0727396c07b48d0a8cb5211b7fb472
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+28f95933dc0727396c07b48d0a8cb5211b7fb472" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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" "+28f95933dc0727396c07b48d0a8cb5211b7fb472" "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-7-tc2/source)`
[INFO] [stderr] versions that meet the requirements `^0.9.4` are: 0.9.5, 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-7-tc2/source)`
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `version_check` which could resolve this conflict
[INFO] testing mingyli/aoc2019 against try#28f95933dc0727396c07b48d0a8cb5211b7fb472 for pr-154065-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmingyli%2Faoc2019" "/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/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-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mingyli/aoc2019 on toolchain 28f95933dc0727396c07b48d0a8cb5211b7fb472
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+28f95933dc0727396c07b48d0a8cb5211b7fb472" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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" "+28f95933dc0727396c07b48d0a8cb5211b7fb472" "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-7-tc2/source)`
[INFO] [stderr] versions that meet the requirements `^0.9.4` are: 0.9.5, 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-7-tc2/source)`
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `version_check` which could resolve this conflict
[INFO] testing mingyli/aoc2019 against try#28f95933dc0727396c07b48d0a8cb5211b7fb472 for pr-154065-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmingyli%2Faoc2019" "/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/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-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mingyli/aoc2019 on toolchain 28f95933dc0727396c07b48d0a8cb5211b7fb472
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+28f95933dc0727396c07b48d0a8cb5211b7fb472" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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" "+28f95933dc0727396c07b48d0a8cb5211b7fb472" "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-7-tc2/source)`
[INFO] [stderr] versions that meet the requirements `^0.9.4` are: 0.9.5, 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-7-tc2/source)`
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `version_check` which could resolve this conflict


overridden task result to prepare-fail:unknown

Caused by:
    0: uncategorized prepare error
    1: command failed: exit status: 101
       
           Updating crates.io index
       error: failed to select a version for `version_check`.
           ... required by package `ahash v0.8.6`
           ... which satisfies dependency `ahash = "^0.8.6"` of package `hashbrown v0.14.3`
           ... which satisfies dependency `hashbrown = "^0.14.3"` 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 `aoc2019 v0.1.0 (/workspace/builds/worker-7-tc2/source)`
       versions that meet the requirements `^0.9.4` are: 0.9.5, 0.9.4
       
       all possible versions conflict with previously selected packages
       
         previously selected package `version_check v0.9.1`
           ... which satisfies dependency `version_check = "^0.9"` (locked to 0.9.1) of package `im v14.0.0`
           ... which satisfies dependency `im = "^14.0.0"` (locked to 14.0.0) of package `aoc2019 v0.1.0 (/workspace/builds/worker-7-tc2/source)`
       
       failed to select a version for `version_check` which could resolve this conflict