[INFO] cloning repository https://github.com/sunkit02/matrix_calc
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sunkit02/matrix_calc" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsunkit02%2Fmatrix_calc", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsunkit02%2Fmatrix_calc'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d3ad995028bac220d4807f74840a1a4601fbbdd3
[INFO] building sunkit02/matrix_calc against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsunkit02%2Fmatrix_calc" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sunkit02/matrix_calc on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sunkit02/matrix_calc
[INFO] finished tweaking git repo https://github.com/sunkit02/matrix_calc
[INFO] tweaked toml for git repo https://github.com/sunkit02/matrix_calc written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/sunkit02/matrix_calc 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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded fraction v0.15.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dd5ee207f2276e0b978327ce14139ec22b098cd425c701484f4c0e4fcb78838c
[INFO] running `Command { std: "docker" "start" "-a" "dd5ee207f2276e0b978327ce14139ec22b098cd425c701484f4c0e4fcb78838c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dd5ee207f2276e0b978327ce14139ec22b098cd425c701484f4c0e4fcb78838c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dd5ee207f2276e0b978327ce14139ec22b098cd425c701484f4c0e4fcb78838c", kill_on_drop: false }`
[INFO] [stdout] dd5ee207f2276e0b978327ce14139ec22b098cd425c701484f4c0e4fcb78838c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid -Dtail-expr-drop-order" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dfa301cb55fc4a3b3b27f331b904bee1d6c25c9f62c918b000a8f7d48fbd9cbb
[INFO] running `Command { std: "docker" "start" "-a" "dfa301cb55fc4a3b3b27f331b904bee1d6c25c9f62c918b000a8f7d48fbd9cbb", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling num-complex v0.4.4
[INFO] [stderr]    Compiling num-bigint v0.4.4
[INFO] [stderr]    Compiling num-iter v0.1.43
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]    Compiling num v0.4.1
[INFO] [stderr]    Compiling fraction v0.15.0
[INFO] [stderr]    Compiling matrix_calc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function `from_iter` is never used
[INFO] [stdout]   --> src/matrix.rs:62:12
[INFO] [stdout]    |
[INFO] [stdout] 54 | impl Matrix {
[INFO] [stdout]    | ----------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 62 |     pub fn from_iter<I, Inner>(iter: I) -> Result<Self, String>
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.18s
[INFO] running `Command { std: "docker" "inspect" "dfa301cb55fc4a3b3b27f331b904bee1d6c25c9f62c918b000a8f7d48fbd9cbb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dfa301cb55fc4a3b3b27f331b904bee1d6c25c9f62c918b000a8f7d48fbd9cbb", kill_on_drop: false }`
[INFO] [stdout] dfa301cb55fc4a3b3b27f331b904bee1d6c25c9f62c918b000a8f7d48fbd9cbb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid -Dtail-expr-drop-order" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ffb8a41ee49cc8039e3c8f5801ca5bc62e6abde4a97f14c4056ccb9687b2d125
[INFO] running `Command { std: "docker" "start" "-a" "ffb8a41ee49cc8039e3c8f5801ca5bc62e6abde4a97f14c4056ccb9687b2d125", kill_on_drop: false }`
[INFO] [stderr]    Compiling matrix_calc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function `from_iter` is never used
[INFO] [stdout]   --> src/matrix.rs:62:12
[INFO] [stdout]    |
[INFO] [stdout] 54 | impl Matrix {
[INFO] [stdout]    | ----------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 62 |     pub fn from_iter<I, Inner>(iter: I) -> Result<Self, String>
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.73s
[INFO] running `Command { std: "docker" "inspect" "ffb8a41ee49cc8039e3c8f5801ca5bc62e6abde4a97f14c4056ccb9687b2d125", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ffb8a41ee49cc8039e3c8f5801ca5bc62e6abde4a97f14c4056ccb9687b2d125", kill_on_drop: false }`
[INFO] [stdout] ffb8a41ee49cc8039e3c8f5801ca5bc62e6abde4a97f14c4056ccb9687b2d125