[INFO] cloning repository https://github.com/garro95/ballista-example
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/garro95/ballista-example" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgarro95%2Fballista-example", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgarro95%2Fballista-example'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7f4c5dc72fd17e58abba1cd74f8bcdb49f3a9539
[INFO] testing garro95/ballista-example against try#28f95933dc0727396c07b48d0a8cb5211b7fb472 for pr-154065-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgarro95%2Fballista-example" "/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/garro95/ballista-example
[INFO] finished tweaking git repo https://github.com/garro95/ballista-example
[INFO] tweaked toml for git repo https://github.com/garro95/ballista-example written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/garro95/ballista-example 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/garro95/ballista-example 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 `proc-macro2`.
[INFO] [stderr]     ... required by package `arrow-flight v6.1.0`
[INFO] [stderr]     ... which satisfies dependency `arrow-flight = "^6.1.0"` of package `ballista-core v0.6.0`
[INFO] [stderr]     ... which satisfies dependency `ballista-core = "^0.6.0"` of package `ballista v0.6.0`
[INFO] [stderr]     ... which satisfies dependency `ballista = "^0.6"` of package `ballista-example v0.1.0 (/workspace/builds/worker-1-tc2/source)`
[INFO] [stderr] versions that meet the requirements `=1.0.27` are: 1.0.27
[INFO] [stderr] 
[INFO] [stderr] all possible versions conflict with previously selected packages
[INFO] [stderr] 
[INFO] [stderr]   previously selected package `proc-macro2 v1.0.26`
[INFO] [stderr]     ... which satisfies dependency `proc-macro2 = "=1.0.26"` of package `ballista-example v0.1.0 (/workspace/builds/worker-1-tc2/source)`
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `proc-macro2` which could resolve this conflict
[INFO] testing garro95/ballista-example against try#28f95933dc0727396c07b48d0a8cb5211b7fb472 for pr-154065-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgarro95%2Fballista-example" "/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/garro95/ballista-example
[INFO] finished tweaking git repo https://github.com/garro95/ballista-example
[INFO] tweaked toml for git repo https://github.com/garro95/ballista-example written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/garro95/ballista-example 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/garro95/ballista-example 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 `proc-macro2`.
[INFO] [stderr]     ... required by package `arrow-flight v6.1.0`
[INFO] [stderr]     ... which satisfies dependency `arrow-flight = "^6.1.0"` of package `ballista-core v0.6.0`
[INFO] [stderr]     ... which satisfies dependency `ballista-core = "^0.6.0"` of package `ballista v0.6.0`
[INFO] [stderr]     ... which satisfies dependency `ballista = "^0.6"` of package `ballista-example v0.1.0 (/workspace/builds/worker-1-tc2/source)`
[INFO] [stderr] versions that meet the requirements `=1.0.27` are: 1.0.27
[INFO] [stderr] 
[INFO] [stderr] all possible versions conflict with previously selected packages
[INFO] [stderr] 
[INFO] [stderr]   previously selected package `proc-macro2 v1.0.26`
[INFO] [stderr]     ... which satisfies dependency `proc-macro2 = "=1.0.26"` of package `ballista-example v0.1.0 (/workspace/builds/worker-1-tc2/source)`
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `proc-macro2` which could resolve this conflict
[INFO] testing garro95/ballista-example against try#28f95933dc0727396c07b48d0a8cb5211b7fb472 for pr-154065-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgarro95%2Fballista-example" "/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/garro95/ballista-example
[INFO] finished tweaking git repo https://github.com/garro95/ballista-example
[INFO] tweaked toml for git repo https://github.com/garro95/ballista-example written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/garro95/ballista-example 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/garro95/ballista-example 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 `proc-macro2`.
[INFO] [stderr]     ... required by package `arrow-flight v6.1.0`
[INFO] [stderr]     ... which satisfies dependency `arrow-flight = "^6.1.0"` of package `ballista-core v0.6.0`
[INFO] [stderr]     ... which satisfies dependency `ballista-core = "^0.6.0"` of package `ballista v0.6.0`
[INFO] [stderr]     ... which satisfies dependency `ballista = "^0.6"` of package `ballista-example v0.1.0 (/workspace/builds/worker-1-tc2/source)`
[INFO] [stderr] versions that meet the requirements `=1.0.27` are: 1.0.27
[INFO] [stderr] 
[INFO] [stderr] all possible versions conflict with previously selected packages
[INFO] [stderr] 
[INFO] [stderr]   previously selected package `proc-macro2 v1.0.26`
[INFO] [stderr]     ... which satisfies dependency `proc-macro2 = "=1.0.26"` of package `ballista-example v0.1.0 (/workspace/builds/worker-1-tc2/source)`
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `proc-macro2` which could resolve this conflict
[INFO] testing garro95/ballista-example against try#28f95933dc0727396c07b48d0a8cb5211b7fb472 for pr-154065-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgarro95%2Fballista-example" "/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/garro95/ballista-example
[INFO] finished tweaking git repo https://github.com/garro95/ballista-example
[INFO] tweaked toml for git repo https://github.com/garro95/ballista-example written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/garro95/ballista-example 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/garro95/ballista-example 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 `proc-macro2`.
[INFO] [stderr]     ... required by package `arrow-flight v6.1.0`
[INFO] [stderr]     ... which satisfies dependency `arrow-flight = "^6.1.0"` of package `ballista-core v0.6.0`
[INFO] [stderr]     ... which satisfies dependency `ballista-core = "^0.6.0"` of package `ballista v0.6.0`
[INFO] [stderr]     ... which satisfies dependency `ballista = "^0.6"` of package `ballista-example v0.1.0 (/workspace/builds/worker-1-tc2/source)`
[INFO] [stderr] versions that meet the requirements `=1.0.27` are: 1.0.27
[INFO] [stderr] 
[INFO] [stderr] all possible versions conflict with previously selected packages
[INFO] [stderr] 
[INFO] [stderr]   previously selected package `proc-macro2 v1.0.26`
[INFO] [stderr]     ... which satisfies dependency `proc-macro2 = "=1.0.26"` of package `ballista-example v0.1.0 (/workspace/builds/worker-1-tc2/source)`
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `proc-macro2` which could resolve this conflict
[INFO] testing garro95/ballista-example against try#28f95933dc0727396c07b48d0a8cb5211b7fb472 for pr-154065-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgarro95%2Fballista-example" "/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/garro95/ballista-example
[INFO] finished tweaking git repo https://github.com/garro95/ballista-example
[INFO] tweaked toml for git repo https://github.com/garro95/ballista-example written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/garro95/ballista-example 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/garro95/ballista-example 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 `proc-macro2`.
[INFO] [stderr]     ... required by package `arrow-flight v6.1.0`
[INFO] [stderr]     ... which satisfies dependency `arrow-flight = "^6.1.0"` of package `ballista-core v0.6.0`
[INFO] [stderr]     ... which satisfies dependency `ballista-core = "^0.6.0"` of package `ballista v0.6.0`
[INFO] [stderr]     ... which satisfies dependency `ballista = "^0.6"` of package `ballista-example v0.1.0 (/workspace/builds/worker-1-tc2/source)`
[INFO] [stderr] versions that meet the requirements `=1.0.27` are: 1.0.27
[INFO] [stderr] 
[INFO] [stderr] all possible versions conflict with previously selected packages
[INFO] [stderr] 
[INFO] [stderr]   previously selected package `proc-macro2 v1.0.26`
[INFO] [stderr]     ... which satisfies dependency `proc-macro2 = "=1.0.26"` of package `ballista-example v0.1.0 (/workspace/builds/worker-1-tc2/source)`
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `proc-macro2` 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 `proc-macro2`.
           ... required by package `arrow-flight v6.1.0`
           ... which satisfies dependency `arrow-flight = "^6.1.0"` of package `ballista-core v0.6.0`
           ... which satisfies dependency `ballista-core = "^0.6.0"` of package `ballista v0.6.0`
           ... which satisfies dependency `ballista = "^0.6"` of package `ballista-example v0.1.0 (/workspace/builds/worker-1-tc2/source)`
       versions that meet the requirements `=1.0.27` are: 1.0.27
       
       all possible versions conflict with previously selected packages
       
         previously selected package `proc-macro2 v1.0.26`
           ... which satisfies dependency `proc-macro2 = "=1.0.26"` of package `ballista-example v0.1.0 (/workspace/builds/worker-1-tc2/source)`
       
       failed to select a version for `proc-macro2` which could resolve this conflict