[INFO] cloning repository https://github.com/shilpaakula06/chat_bot_sample
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/shilpaakula06/chat_bot_sample" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshilpaakula06%2Fchat_bot_sample", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshilpaakula06%2Fchat_bot_sample'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 920f246d3aa9a50a272dbbeb40e4a7750c2bb9b6
[INFO] checking shilpaakula06/chat_bot_sample against master#31a9463c6e2794a59ce57a8f37abc6966afc2a58 for pr-156807
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshilpaakula06%2Fchat_bot_sample" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/shilpaakula06/chat_bot_sample
[INFO] finished tweaking git repo https://github.com/shilpaakula06/chat_bot_sample
[INFO] tweaked toml for git repo https://github.com/shilpaakula06/chat_bot_sample written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/shilpaakula06/chat_bot_sample 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] crate git repo https://github.com/shilpaakula06/chat_bot_sample 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" "+31a9463c6e2794a59ce57a8f37abc6966afc2a58" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: failed to select a version for `openssl-sys`.
[INFO] [stderr]     ... required by package `openssl v0.6.7`
[INFO] [stderr]     ... which satisfies dependency `openssl = "^0.6"` (locked to 0.6.7) of package `hyper v0.5.2`
[INFO] [stderr]     ... which satisfies dependency `hyper = "~0.5"` (locked to 0.5.2) of package `chatbot v0.2.3`
[INFO] [stderr]     ... which satisfies dependency `chatbot = "^0.2.3"` (locked to 0.2.3) of package `chat_bot_sample v0.1.0 (/workspace/builds/worker-3-tc1/source)`
[INFO] [stderr] versions that meet the requirements `^0.6.7` (locked to 0.6.7) are: 0.6.7
[INFO] [stderr] 
[INFO] [stderr] package `openssl-sys` links to the native library `openssl`, but it conflicts with a previous package which links to `openssl` as well:
[INFO] [stderr] package `openssl-sys v0.9.93`
[INFO] [stderr]     ... which satisfies dependency `openssl-sys = "^0.9.36"` (locked to 0.9.93) of package `chat_bot_sample v0.1.0 (/workspace/builds/worker-3-tc1/source)`
[INFO] [stderr] note: only one package in the dependency graph may specify the same links value to ensure that only one copy of a native library is linked in the final binary
[INFO] [stderr] for more information, see https://doc.rust-lang.org/cargo/reference/resolver.html#links
[INFO] [stderr] help: try to adjust your dependencies so that only one package uses the `links = "openssl"` value
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `openssl-sys` 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 `openssl-sys`.
           ... required by package `openssl v0.6.7`
           ... which satisfies dependency `openssl = "^0.6"` (locked to 0.6.7) of package `hyper v0.5.2`
           ... which satisfies dependency `hyper = "~0.5"` (locked to 0.5.2) of package `chatbot v0.2.3`
           ... which satisfies dependency `chatbot = "^0.2.3"` (locked to 0.2.3) of package `chat_bot_sample v0.1.0 (/workspace/builds/worker-3-tc1/source)`
       versions that meet the requirements `^0.6.7` (locked to 0.6.7) are: 0.6.7
       
       package `openssl-sys` links to the native library `openssl`, but it conflicts with a previous package which links to `openssl` as well:
       package `openssl-sys v0.9.93`
           ... which satisfies dependency `openssl-sys = "^0.9.36"` (locked to 0.9.93) of package `chat_bot_sample v0.1.0 (/workspace/builds/worker-3-tc1/source)`
       note: only one package in the dependency graph may specify the same links value to ensure that only one copy of a native library is linked in the final binary
       for more information, see https://doc.rust-lang.org/cargo/reference/resolver.html#links
       help: try to adjust your dependencies so that only one package uses the `links = "openssl"` value
       
       failed to select a version for `openssl-sys` which could resolve this conflict