[INFO] cloning repository https://github.com/taekyunk/combine_line
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/taekyunk/combine_line" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftaekyunk%2Fcombine_line", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftaekyunk%2Fcombine_line'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 622efa2f50db734cae8d8331ad0fd6f77e5675fa
[INFO] testing taekyunk/combine_line against master#1ddedbaa5919b7b3e70d984660e21e844c615c97 for pr-128400
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftaekyunk%2Fcombine_line" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/taekyunk/combine_line on toolchain 1ddedbaa5919b7b3e70d984660e21e844c615c97
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1ddedbaa5919b7b3e70d984660e21e844c615c97" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/taekyunk/combine_line
[INFO] finished tweaking git repo https://github.com/taekyunk/combine_line
[INFO] tweaked toml for git repo https://github.com/taekyunk/combine_line written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/taekyunk/combine_line 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" "+1ddedbaa5919b7b3e70d984660e21e844c615c97" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1ddedbaa5919b7b3e70d984660e21e844c615c97" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 81cf7de09fd690837d8a8aebfda7aa0440a8cb777b3ddc6aed84bbb28ff67b38
[INFO] running `Command { std: "docker" "start" "-a" "81cf7de09fd690837d8a8aebfda7aa0440a8cb777b3ddc6aed84bbb28ff67b38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "81cf7de09fd690837d8a8aebfda7aa0440a8cb777b3ddc6aed84bbb28ff67b38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "81cf7de09fd690837d8a8aebfda7aa0440a8cb777b3ddc6aed84bbb28ff67b38", kill_on_drop: false }`
[INFO] [stdout] 81cf7de09fd690837d8a8aebfda7aa0440a8cb777b3ddc6aed84bbb28ff67b38
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1ddedbaa5919b7b3e70d984660e21e844c615c97" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5dcbc0d07ef60dbcb3a97fa769a1004836abe564a314e4e73fbe3d27572289fe
[INFO] running `Command { std: "docker" "start" "-a" "5dcbc0d07ef60dbcb3a97fa769a1004836abe564a314e4e73fbe3d27572289fe", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.47
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling unicode-width v0.1.5
[INFO] [stderr]    Compiling bitflags v1.0.4
[INFO] [stderr]    Compiling either v1.5.0
[INFO] [stderr]    Compiling regex-syntax v0.6.26
[INFO] [stderr]    Compiling once_cell v1.12.0
[INFO] [stderr]    Compiling vec_map v0.8.1
[INFO] [stderr]    Compiling textwrap v0.10.0
[INFO] [stderr]    Compiling ansi_term v0.11.0
[INFO] [stderr]    Compiling strsim v0.7.0
[INFO] [stderr]    Compiling itertools v0.8.0
[INFO] [stderr]    Compiling thread_local v1.1.4
[INFO] [stderr]    Compiling lazy_static v1.2.0
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling atty v0.2.11
[INFO] [stderr]    Compiling clap v2.32.0
[INFO] [stderr]    Compiling regex v1.5.6
[INFO] [stderr]    Compiling combine_line v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: a method with this name may be added to the standard library in the future
[INFO] [stdout]   --> src/main.rs:31:10
[INFO] [stdout]    |
[INFO] [stdout] 31 |         .intersperse(". \n")
[INFO] [stdout]    |          ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]    = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]    = help: call with fully qualified syntax `itertools::Itertools::intersperse(...)` to keep using the current method
[INFO] [stdout]    = note: `#[warn(unstable_name_collisions)]` on by default
[INFO] [stdout] help: add `#![feature(iter_intersperse)]` to the crate attributes to enable `std::iter::Iterator::intersperse`
[INFO] [stdout]    |
[INFO] [stdout] 1  + #![feature(iter_intersperse)]
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.49s
[INFO] running `Command { std: "docker" "inspect" "5dcbc0d07ef60dbcb3a97fa769a1004836abe564a314e4e73fbe3d27572289fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5dcbc0d07ef60dbcb3a97fa769a1004836abe564a314e4e73fbe3d27572289fe", kill_on_drop: false }`
[INFO] [stdout] 5dcbc0d07ef60dbcb3a97fa769a1004836abe564a314e4e73fbe3d27572289fe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1ddedbaa5919b7b3e70d984660e21e844c615c97" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6ccae58d87db438357d9f7de66760cf0e6eb74449183f44411cef9156281809d
[INFO] running `Command { std: "docker" "start" "-a" "6ccae58d87db438357d9f7de66760cf0e6eb74449183f44411cef9156281809d", kill_on_drop: false }`
[INFO] [stderr]    Compiling combine_line v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: a method with this name may be added to the standard library in the future
[INFO] [stdout]   --> src/main.rs:31:10
[INFO] [stdout]    |
[INFO] [stdout] 31 |         .intersperse(". \n")
[INFO] [stdout]    |          ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]    = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]    = help: call with fully qualified syntax `itertools::Itertools::intersperse(...)` to keep using the current method
[INFO] [stdout]    = note: `#[warn(unstable_name_collisions)]` on by default
[INFO] [stdout] help: add `#![feature(iter_intersperse)]` to the crate attributes to enable `std::iter::Iterator::intersperse`
[INFO] [stdout]    |
[INFO] [stdout] 1  + #![feature(iter_intersperse)]
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.23s
[INFO] running `Command { std: "docker" "inspect" "6ccae58d87db438357d9f7de66760cf0e6eb74449183f44411cef9156281809d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6ccae58d87db438357d9f7de66760cf0e6eb74449183f44411cef9156281809d", kill_on_drop: false }`
[INFO] [stdout] 6ccae58d87db438357d9f7de66760cf0e6eb74449183f44411cef9156281809d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1ddedbaa5919b7b3e70d984660e21e844c615c97" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 35d1df12f8f2e51c03f3806f447a872d374a4dd0d33524bc8ed56c52321c80d2
[INFO] running `Command { std: "docker" "start" "-a" "35d1df12f8f2e51c03f3806f447a872d374a4dd0d33524bc8ed56c52321c80d2", kill_on_drop: false }`
[INFO] [stderr] warning: a method with this name may be added to the standard library in the future
[INFO] [stderr]   --> src/main.rs:31:10
[INFO] [stderr]    |
[INFO] [stderr] 31 |         .intersperse(". \n")
[INFO] [stderr]    |          ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]    = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]    = help: call with fully qualified syntax `itertools::Itertools::intersperse(...)` to keep using the current method
[INFO] [stderr]    = note: `#[warn(unstable_name_collisions)]` on by default
[INFO] [stderr] help: add `#![feature(iter_intersperse)]` to the crate attributes to enable `std::iter::Iterator::intersperse`
[INFO] [stderr]    |
[INFO] [stderr] 1  + #![feature(iter_intersperse)]
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: `combine_line` (bin "combine_line" test) generated 1 warning
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/combine_line-827b66579a0b1514)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "35d1df12f8f2e51c03f3806f447a872d374a4dd0d33524bc8ed56c52321c80d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "35d1df12f8f2e51c03f3806f447a872d374a4dd0d33524bc8ed56c52321c80d2", kill_on_drop: false }`
[INFO] [stdout] 35d1df12f8f2e51c03f3806f447a872d374a4dd0d33524bc8ed56c52321c80d2
[INFO] testing taekyunk/combine_line against try#33f1d8bb92813a1bfc23c093c9f443ab09290307 for pr-128400
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftaekyunk%2Fcombine_line" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/taekyunk/combine_line on toolchain 33f1d8bb92813a1bfc23c093c9f443ab09290307
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+33f1d8bb92813a1bfc23c093c9f443ab09290307" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/taekyunk/combine_line
[INFO] finished tweaking git repo https://github.com/taekyunk/combine_line
[INFO] tweaked toml for git repo https://github.com/taekyunk/combine_line written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/taekyunk/combine_line 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" "+33f1d8bb92813a1bfc23c093c9f443ab09290307" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+33f1d8bb92813a1bfc23c093c9f443ab09290307" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9717ee63e193a272985fe6691d6ec47340d95b6c3cd87bee61ff7781639a1680
[INFO] running `Command { std: "docker" "start" "-a" "9717ee63e193a272985fe6691d6ec47340d95b6c3cd87bee61ff7781639a1680", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9717ee63e193a272985fe6691d6ec47340d95b6c3cd87bee61ff7781639a1680", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9717ee63e193a272985fe6691d6ec47340d95b6c3cd87bee61ff7781639a1680", kill_on_drop: false }`
[INFO] [stdout] 9717ee63e193a272985fe6691d6ec47340d95b6c3cd87bee61ff7781639a1680
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+33f1d8bb92813a1bfc23c093c9f443ab09290307" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 472cb40e5808bad50f5b155ceb32b29e2c7cfb7aca4aff7c08554c8ee6edff8c
[INFO] running `Command { std: "docker" "start" "-a" "472cb40e5808bad50f5b155ceb32b29e2c7cfb7aca4aff7c08554c8ee6edff8c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.47
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling unicode-width v0.1.5
[INFO] [stderr]    Compiling bitflags v1.0.4
[INFO] [stderr]    Compiling regex-syntax v0.6.26
[INFO] [stderr]    Compiling once_cell v1.12.0
[INFO] [stderr]    Compiling strsim v0.7.0
[INFO] [stderr]    Compiling vec_map v0.8.1
[INFO] [stderr]    Compiling textwrap v0.10.0
[INFO] [stderr]    Compiling either v1.5.0
[INFO] [stderr]    Compiling ansi_term v0.11.0
[INFO] [stderr]    Compiling itertools v0.8.0
[INFO] [stderr]    Compiling thread_local v1.1.4
[INFO] [stderr]    Compiling lazy_static v1.2.0
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling atty v0.2.11
[INFO] [stderr]    Compiling clap v2.32.0
[INFO] [stderr]    Compiling regex v1.5.6
[INFO] [stderr]    Compiling combine_line v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: a method with this name may be added to the standard library in the future
[INFO] [stdout]   --> src/main.rs:31:10
[INFO] [stdout]    |
[INFO] [stdout] 31 |         .intersperse(". \n")
[INFO] [stdout]    |          ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]    = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]    = help: call with fully qualified syntax `itertools::Itertools::intersperse(...)` to keep using the current method
[INFO] [stdout]    = note: `#[warn(unstable_name_collisions)]` on by default
[INFO] [stdout] help: add `#![feature(iter_intersperse)]` to the crate attributes to enable `std::iter::Iterator::intersperse`
[INFO] [stdout]    |
[INFO] [stdout] 1  + #![feature(iter_intersperse)]
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.75s
[INFO] running `Command { std: "docker" "inspect" "472cb40e5808bad50f5b155ceb32b29e2c7cfb7aca4aff7c08554c8ee6edff8c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "472cb40e5808bad50f5b155ceb32b29e2c7cfb7aca4aff7c08554c8ee6edff8c", kill_on_drop: false }`
[INFO] [stdout] 472cb40e5808bad50f5b155ceb32b29e2c7cfb7aca4aff7c08554c8ee6edff8c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+33f1d8bb92813a1bfc23c093c9f443ab09290307" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 602f72c35f61c41edc4a80ef8bea5fb64efcfabfb79f72de0ae394892470df3c
[INFO] running `Command { std: "docker" "start" "-a" "602f72c35f61c41edc4a80ef8bea5fb64efcfabfb79f72de0ae394892470df3c", kill_on_drop: false }`
[INFO] [stderr]    Compiling combine_line v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: a method with this name may be added to the standard library in the future
[INFO] [stdout]   --> src/main.rs:31:10
[INFO] [stdout]    |
[INFO] [stdout] 31 |         .intersperse(". \n")
[INFO] [stdout]    |          ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]    = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]    = help: call with fully qualified syntax `itertools::Itertools::intersperse(...)` to keep using the current method
[INFO] [stdout]    = note: `#[warn(unstable_name_collisions)]` on by default
[INFO] [stdout] help: add `#![feature(iter_intersperse)]` to the crate attributes to enable `std::iter::Iterator::intersperse`
[INFO] [stdout]    |
[INFO] [stdout] 1  + #![feature(iter_intersperse)]
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: linking with `cc` failed: exit status: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note: LC_ALL="C" PATH="/opt/rustwide/rustup-home/toolchains/33f1d8bb92813a1bfc23c093c9f443ab09290307/lib/rustlib/x86_64-unknown-linux-gnu/bin:/opt/rustwide/rustup-home/toolchains/33f1d8bb92813a1bfc23c093c9f443ab09290307/lib/rustlib/x86_64-unknown-linux-gnu/bin/self-contained:/opt/rustwide/rustup-home/toolchains/33f1d8bb92813a1bfc23c093c9f443ab09290307/lib/rustlib/x86_64-unknown-linux-gnu/bin:/opt/rustwide/rustup-home/toolchains/33f1d8bb92813a1bfc23c093c9f443ab09290307/lib/rustlib/x86_64-unknown-linux-gnu/bin/self-contained:/opt/rustwide/rustup-home/toolchains/33f1d8bb92813a1bfc23c093c9f443ab09290307/lib/rustlib/x86_64-unknown-linux-gnu/bin:/opt/rustwide/rustup-home/toolchains/33f1d8bb92813a1bfc23c093c9f443ab09290307/lib/rustlib/x86_64-unknown-linux-gnu/bin/self-contained:/opt/rustwide/cargo-home/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin" VSLANG="1033" "cc" "-m64" "/tmp/rustcWwxgjo/symbols.o" "/opt/rustwide/target/debug/deps/combine_line-827b66579a0b1514.combine_line.3eafa571fedde129-cgu.0.rcgu.o" "/opt/rustwide/target/debug/deps/combine_line-827b66579a0b1514.80v1tw17bdz6bjuhr27b9jr00.rcgu.o" "-Wl,--as-needed" "-L" "/opt/rustwide/target/debug/deps" "-L" "/opt/rustwide/rustup-home/toolchains/33f1d8bb92813a1bfc23c093c9f443ab09290307/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/rustwide/rustup-home/toolchains/33f1d8bb92813a1bfc23c093c9f443ab09290307/lib/rustlib/x86_64-unknown-linux-gnu/lib/libtest-d2aabef62695c36a.rlib" "/opt/rustwide/rustup-home/toolchains/33f1d8bb92813a1bfc23c093c9f443ab09290307/lib/rustlib/x86_64-unknown-linux-gnu/lib/libgetopts-85ffb1adee1b6de7.rlib" "/opt/rustwide/rustup-home/toolchains/33f1d8bb92813a1bfc23c093c9f443ab09290307/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunicode_width-47c1d1c97d43fb9c.rlib" "/opt/rustwide/rustup-home/toolchains/33f1d8bb92813a1bfc23c093c9f443ab09290307/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_std-767d58143f86b11a.rlib" "/opt/rustwide/target/debug/deps/libitertools-5b7947b47c004aed.rlib" "/opt/rustwide/target/debug/deps/libeither-b8d35442016604f8.rlib" "/opt/rustwide/target/debug/deps/liblazy_static-2d7273ae5c232b84.rlib" "/opt/rustwide/target/debug/deps/libregex-df4741e0356188d8.rlib" "/opt/rustwide/target/debug/deps/libaho_corasick-80f7a70dd86fdf7a.rlib" "/opt/rustwide/target/debug/deps/libmemchr-a4f7a93850c27d99.rlib" "/opt/rustwide/target/debug/deps/libregex_syntax-7ffa49b660516afe.rlib" "/opt/rustwide/target/debug/deps/libclap-08e97e477faa13e8.rlib" "/opt/rustwide/target/debug/deps/libvec_map-eac28ef77e7894f4.rlib" "/opt/rustwide/target/debug/deps/libtextwrap-32e0c0e83b05fe75.rlib" "/opt/rustwide/target/debug/deps/libunicode_width-e4b1988cf7eebb1f.rlib" "/opt/rustwide/target/debug/deps/libstrsim-07930e1cd81ce9fd.rlib" "/opt/rustwide/target/debug/deps/libbitflags-6684b7fdeed469bb.rlib" "/opt/rustwide/target/debug/deps/libatty-2c005be6ee574b38.rlib" "/opt/rustwide/target/debug/deps/liblibc-e139610af5d9f376.rlib" "/opt/rustwide/target/debug/deps/libansi_term-c5d639f3e545ec5b.rlib" "/opt/rustwide/rustup-home/toolchains/33f1d8bb92813a1bfc23c093c9f443ab09290307/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-9506e3738f23e7c7.rlib" "/opt/rustwide/rustup-home/toolchains/33f1d8bb92813a1bfc23c093c9f443ab09290307/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-0e87bdc388165b9b.rlib" "/opt/rustwide/rustup-home/toolchains/33f1d8bb92813a1bfc23c093c9f443ab09290307/lib/rustlib/x86_64-unknown-linux-gnu/lib/libobject-28d2ee21ffecbcd0.rlib" "/opt/rustwide/rustup-home/toolchains/33f1d8bb92813a1bfc23c093c9f443ab09290307/lib/rustlib/x86_64-unknown-linux-gnu/lib/libmemchr-4cd64c3d9fc2560b.rlib" "/opt/rustwide/rustup-home/toolchains/33f1d8bb92813a1bfc23c093c9f443ab09290307/lib/rustlib/x86_64-unknown-linux-gnu/lib/libaddr2line-a1fedeceba4cc892.rlib" "/opt/rustwide/rustup-home/toolchains/33f1d8bb92813a1bfc23c093c9f443ab09290307/lib/rustlib/x86_64-unknown-linux-gnu/lib/libgimli-0b8915cbc76cd410.rlib" "/opt/rustwide/rustup-home/toolchains/33f1d8bb92813a1bfc23c093c9f443ab09290307/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-fec2ce82fc5b17fa.rlib" "/opt/rustwide/rustup-home/toolchains/33f1d8bb92813a1bfc23c093c9f443ab09290307/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd_detect-fdb02324b55b2840.rlib" "/opt/rustwide/rustup-home/toolchains/33f1d8bb92813a1bfc23c093c9f443ab09290307/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-db981ef273c68b12.rlib" "/opt/rustwide/rustup-home/toolchains/33f1d8bb92813a1bfc23c093c9f443ab09290307/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-2c4968ed4cb29e9c.rlib" "/opt/rustwide/rustup-home/toolchains/33f1d8bb92813a1bfc23c093c9f443ab09290307/lib/rustlib/x86_64-unknown-linux-gnu/lib/libminiz_oxide-661cdd70a5b83118.rlib" "/opt/rustwide/rustup-home/toolchains/33f1d8bb92813a1bfc23c093c9f443ab09290307/lib/rustlib/x86_64-unknown-linux-gnu/lib/libadler-9cbb3bfdc8e63ca5.rlib" "/opt/rustwide/rustup-home/toolchains/33f1d8bb92813a1bfc23c093c9f443ab09290307/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-a4c5ad4392a26401.rlib" "/opt/rustwide/rustup-home/toolchains/33f1d8bb92813a1bfc23c093c9f443ab09290307/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-9409cd7d030362b9.rlib" "/opt/rustwide/rustup-home/toolchains/33f1d8bb92813a1bfc23c093c9f443ab09290307/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-7b90a2705bcf265b.rlib" "/opt/rustwide/rustup-home/toolchains/33f1d8bb92813a1bfc23c093c9f443ab09290307/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-80d2f129fb536a6f.rlib" "/opt/rustwide/rustup-home/toolchains/33f1d8bb92813a1bfc23c093c9f443ab09290307/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-f72b956e24d1de70.rlib" "/opt/rustwide/rustup-home/toolchains/33f1d8bb92813a1bfc23c093c9f443ab09290307/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-632ae0f28c5e55ff.rlib" "/opt/rustwide/rustup-home/toolchains/33f1d8bb92813a1bfc23c093c9f443ab09290307/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-7586cb84705120bb.rlib" "-Wl,-Bdynamic" "-lutil" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc" "-B/opt/rustwide/rustup-home/toolchains/33f1d8bb92813a1bfc23c093c9f443ab09290307/lib/rustlib/x86_64-unknown-linux-gnu/bin/gcc-ld" "-B/opt/rustwide/rustup-home/toolchains/33f1d8bb92813a1bfc23c093c9f443ab09290307/lib/rustlib/x86_64-unknown-linux-gnu/bin/gcc-ld" "-B/opt/rustwide/rustup-home/toolchains/33f1d8bb92813a1bfc23c093c9f443ab09290307/lib/rustlib/x86_64-unknown-linux-gnu/bin/gcc-ld" "-fuse-ld=lld" "-Wl,--eh-frame-hdr" "-Wl,-z,noexecstack" "-L" "/opt/rustwide/rustup-home/toolchains/33f1d8bb92813a1bfc23c093c9f443ab09290307/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-L" "/opt/rustwide/rustup-home/toolchains/33f1d8bb92813a1bfc23c093c9f443ab09290307/lib/rustlib/x86_64-unknown-linux-gnu/lib/self-contained" "-o" "/opt/rustwide/target/debug/deps/combine_line-827b66579a0b1514" "-Wl,--gc-sections" "-pie" "-Wl,-z,relro,-z,now" "-nodefaultlibs"
[INFO] [stdout]   = note: collect2: fatal error: ld terminated with signal 7 [Bus error], core dumped
[INFO] [stdout]           compilation terminated.
[INFO] [stdout]           
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `combine_line` (bin "combine_line" test) due to 1 previous error; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "602f72c35f61c41edc4a80ef8bea5fb64efcfabfb79f72de0ae394892470df3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "602f72c35f61c41edc4a80ef8bea5fb64efcfabfb79f72de0ae394892470df3c", kill_on_drop: false }`
[INFO] [stdout] 602f72c35f61c41edc4a80ef8bea5fb64efcfabfb79f72de0ae394892470df3c