[INFO] cloning repository https://github.com/matthiaskrgr/raca
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/matthiaskrgr/raca" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmatthiaskrgr%2Fraca", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmatthiaskrgr%2Fraca'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ea9f9bf01fd3ac52d69d402620eb5f87162adaf0
[INFO] testing matthiaskrgr/raca against 1.90.0 for beta-1.91-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmatthiaskrgr%2Fraca" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/matthiaskrgr/raca
[INFO] finished tweaking git repo https://github.com/matthiaskrgr/raca
[INFO] tweaked toml for git repo https://github.com/matthiaskrgr/raca written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/matthiaskrgr/raca on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/matthiaskrgr/raca 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" "+1.90.0" "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 the requirement `serde_json = "^1.0"` (locked to 1.0.39)
[INFO] [stderr] candidate versions found which didn't match: 1.0.8, 1.0.7, 1.0.6, ...
[INFO] [stderr] location searched: crates.io index
[INFO] [stderr] required by package `raca v0.1.0 (/workspace/builds/worker-1-tc1/source)`
[INFO] [stderr] if you are looking for the prerelease package it needs to be specified explicitly
[INFO] [stderr]     serde_json = { version = "0.9.0-rc3" }


command failed: exit status: 101

    Blocking waiting for file lock on package cache
    Updating crates.io index
error: failed to select a version for the requirement `serde_json = "^1.0"` (locked to 1.0.39)
candidate versions found which didn't match: 1.0.8, 1.0.7, 1.0.6, ...
location searched: crates.io index
required by package `raca v0.1.0 (/workspace/builds/worker-1-tc1/source)`
if you are looking for the prerelease package it needs to be specified explicitly
    serde_json = { version = "0.9.0-rc3" }