[INFO] cloning repository https://github.com/lancenonce/hiding
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lancenonce/hiding" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flancenonce%2Fhiding", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flancenonce%2Fhiding'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2127100c904c295c291c2b4e341d328f268c8695
[INFO] testing lancenonce/hiding against master#d98a5da813da67eb189387b8ccfb73cf481275d8+rustflags=-Copt-level=3 for pr-138759
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flancenonce%2Fhiding" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/lancenonce/hiding
[INFO] finished tweaking git repo https://github.com/lancenonce/hiding
[INFO] tweaked toml for git repo https://github.com/lancenonce/hiding written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/lancenonce/hiding on toolchain d98a5da813da67eb189387b8ccfb73cf481275d8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/lancenonce/hiding 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" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "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 `syn = "^1.0.3"` (locked to 1.0.109)
[INFO] [stderr] candidate versions found which didn't match: 0.15.11, 0.15.10, 0.15.9, ...
[INFO] [stderr] location searched: crates.io index
[INFO] [stderr] required by package `derivative v2.2.0`
[INFO] [stderr]     ... which satisfies dependency `derivative = "^2"` (locked to 2.2.0) of package `ark-ec v0.3.0`
[INFO] [stderr]     ... which satisfies dependency `ark-ec = "^0.3"` (locked to 0.3.0) of package `hiding v0.1.0 (/workspace/builds/worker-6-tc1/source)`


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 `syn = "^1.0.3"` (locked to 1.0.109)
candidate versions found which didn't match: 0.15.11, 0.15.10, 0.15.9, ...
location searched: crates.io index
required by package `derivative v2.2.0`
    ... which satisfies dependency `derivative = "^2"` (locked to 2.2.0) of package `ark-ec v0.3.0`
    ... which satisfies dependency `ark-ec = "^0.3"` (locked to 0.3.0) of package `hiding v0.1.0 (/workspace/builds/worker-6-tc1/source)`