[INFO] fetching crate rumblebars 0.3.0...
[INFO] checking rumblebars-0.3.0 against master#31a9463c6e2794a59ce57a8f37abc6966afc2a58 for pr-156807
[INFO] extracting crate rumblebars 0.3.0 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate rumblebars 0.3.0
[INFO] finished tweaking crates.io crate rumblebars 0.3.0
[INFO] tweaked toml for crates.io crate rumblebars 0.3.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate rumblebars 0.3.0 on toolchain 31a9463c6e2794a59ce57a8f37abc6966afc2a58
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+31a9463c6e2794a59ce57a8f37abc6966afc2a58" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+31a9463c6e2794a59ce57a8f37abc6966afc2a58" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: failed to select a version for `rustlex_codegen`.
[INFO] [stderr]     ... required by package `rumblebars v0.3.0 (/workspace/builds/worker-6-tc1/source)`
[INFO] [stderr] versions that meet the requirements `*` are: 0.4.0, 0.3.4
[INFO] [stderr] 
[INFO] [stderr] package `rumblebars` depends on `rustlex_codegen` with feature `with-syntex` but `rustlex_codegen` does not have that feature.
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `rustlex_codegen` 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 `rustlex_codegen`.
           ... required by package `rumblebars v0.3.0 (/workspace/builds/worker-6-tc1/source)`
       versions that meet the requirements `*` are: 0.4.0, 0.3.4
       
       package `rumblebars` depends on `rustlex_codegen` with feature `with-syntex` but `rustlex_codegen` does not have that feature.
       
       
       failed to select a version for `rustlex_codegen` which could resolve this conflict