[INFO] cloning repository https://github.com/pixelcodecrafter/rust-blockchain
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/pixelcodecrafter/rust-blockchain" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpixelcodecrafter%2Frust-blockchain", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpixelcodecrafter%2Frust-blockchain'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 18c93f8975476d5b007593243594b6e888e0c888
[INFO] checking pixelcodecrafter/rust-blockchain against try#723ab942d877517caf445dafde0416803ef56501 for pr-143857
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpixelcodecrafter%2Frust-blockchain" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/pixelcodecrafter/rust-blockchain
[INFO] finished tweaking git repo https://github.com/pixelcodecrafter/rust-blockchain
[INFO] tweaked toml for git repo https://github.com/pixelcodecrafter/rust-blockchain written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/pixelcodecrafter/rust-blockchain on toolchain 723ab942d877517caf445dafde0416803ef56501
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+723ab942d877517caf445dafde0416803ef56501" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/pixelcodecrafter/rust-blockchain 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" "+723ab942d877517caf445dafde0416803ef56501" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: failed to select a version for the requirement `ink_lang = "^4.0"`
[INFO] [stderr] candidate versions found which didn't match: 4.0.0-alpha.1, 3.4.0, 3.3.1, ...
[INFO] [stderr] location searched: crates.io index
[INFO] [stderr] required by package `rust-blockchain v0.1.0 (/workspace/builds/worker-1-tc2/source)`
[INFO] [stderr] if you are looking for the prerelease package it needs to be specified explicitly
[INFO] [stderr]     ink_lang = { version = "4.0.0-alpha.1" }
[INFO] checking pixelcodecrafter/rust-blockchain against try#723ab942d877517caf445dafde0416803ef56501 for pr-143857
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpixelcodecrafter%2Frust-blockchain" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/pixelcodecrafter/rust-blockchain
[INFO] finished tweaking git repo https://github.com/pixelcodecrafter/rust-blockchain
[INFO] tweaked toml for git repo https://github.com/pixelcodecrafter/rust-blockchain written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/pixelcodecrafter/rust-blockchain on toolchain 723ab942d877517caf445dafde0416803ef56501
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+723ab942d877517caf445dafde0416803ef56501" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/pixelcodecrafter/rust-blockchain 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" "+723ab942d877517caf445dafde0416803ef56501" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: failed to select a version for the requirement `ink_lang = "^4.0"`
[INFO] [stderr] candidate versions found which didn't match: 4.0.0-alpha.1, 3.4.0, 3.3.1, ...
[INFO] [stderr] location searched: crates.io index
[INFO] [stderr] required by package `rust-blockchain v0.1.0 (/workspace/builds/worker-1-tc2/source)`
[INFO] [stderr] if you are looking for the prerelease package it needs to be specified explicitly
[INFO] [stderr]     ink_lang = { version = "4.0.0-alpha.1" }
[INFO] checking pixelcodecrafter/rust-blockchain against try#723ab942d877517caf445dafde0416803ef56501 for pr-143857
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpixelcodecrafter%2Frust-blockchain" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/pixelcodecrafter/rust-blockchain
[INFO] finished tweaking git repo https://github.com/pixelcodecrafter/rust-blockchain
[INFO] tweaked toml for git repo https://github.com/pixelcodecrafter/rust-blockchain written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/pixelcodecrafter/rust-blockchain on toolchain 723ab942d877517caf445dafde0416803ef56501
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+723ab942d877517caf445dafde0416803ef56501" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/pixelcodecrafter/rust-blockchain 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" "+723ab942d877517caf445dafde0416803ef56501" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: failed to select a version for the requirement `ink_lang = "^4.0"`
[INFO] [stderr] candidate versions found which didn't match: 4.0.0-alpha.1, 3.4.0, 3.3.1, ...
[INFO] [stderr] location searched: crates.io index
[INFO] [stderr] required by package `rust-blockchain v0.1.0 (/workspace/builds/worker-1-tc2/source)`
[INFO] [stderr] if you are looking for the prerelease package it needs to be specified explicitly
[INFO] [stderr]     ink_lang = { version = "4.0.0-alpha.1" }
[INFO] checking pixelcodecrafter/rust-blockchain against try#723ab942d877517caf445dafde0416803ef56501 for pr-143857
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpixelcodecrafter%2Frust-blockchain" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/pixelcodecrafter/rust-blockchain
[INFO] finished tweaking git repo https://github.com/pixelcodecrafter/rust-blockchain
[INFO] tweaked toml for git repo https://github.com/pixelcodecrafter/rust-blockchain written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/pixelcodecrafter/rust-blockchain on toolchain 723ab942d877517caf445dafde0416803ef56501
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+723ab942d877517caf445dafde0416803ef56501" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/pixelcodecrafter/rust-blockchain 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" "+723ab942d877517caf445dafde0416803ef56501" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: failed to select a version for the requirement `ink_lang = "^4.0"`
[INFO] [stderr] candidate versions found which didn't match: 4.0.0-alpha.1, 3.4.0, 3.3.1, ...
[INFO] [stderr] location searched: crates.io index
[INFO] [stderr] required by package `rust-blockchain v0.1.0 (/workspace/builds/worker-1-tc2/source)`
[INFO] [stderr] if you are looking for the prerelease package it needs to be specified explicitly
[INFO] [stderr]     ink_lang = { version = "4.0.0-alpha.1" }
[INFO] checking pixelcodecrafter/rust-blockchain against try#723ab942d877517caf445dafde0416803ef56501 for pr-143857
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpixelcodecrafter%2Frust-blockchain" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/pixelcodecrafter/rust-blockchain
[INFO] finished tweaking git repo https://github.com/pixelcodecrafter/rust-blockchain
[INFO] tweaked toml for git repo https://github.com/pixelcodecrafter/rust-blockchain written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/pixelcodecrafter/rust-blockchain on toolchain 723ab942d877517caf445dafde0416803ef56501
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+723ab942d877517caf445dafde0416803ef56501" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/pixelcodecrafter/rust-blockchain 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" "+723ab942d877517caf445dafde0416803ef56501" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: failed to select a version for the requirement `ink_lang = "^4.0"`
[INFO] [stderr] candidate versions found which didn't match: 4.0.0-alpha.1, 3.4.0, 3.3.1, ...
[INFO] [stderr] location searched: crates.io index
[INFO] [stderr] required by package `rust-blockchain v0.1.0 (/workspace/builds/worker-1-tc2/source)`
[INFO] [stderr] if you are looking for the prerelease package it needs to be specified explicitly
[INFO] [stderr]     ink_lang = { version = "4.0.0-alpha.1" }


command failed: exit status: 101

    Updating crates.io index
error: failed to select a version for the requirement `ink_lang = "^4.0"`
candidate versions found which didn't match: 4.0.0-alpha.1, 3.4.0, 3.3.1, ...
location searched: crates.io index
required by package `rust-blockchain v0.1.0 (/workspace/builds/worker-1-tc2/source)`
if you are looking for the prerelease package it needs to be specified explicitly
    ink_lang = { version = "4.0.0-alpha.1" }