[INFO] cloning repository https://github.com/kenleung5e28/grepr
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kenleung5e28/grepr" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkenleung5e28%2Fgrepr", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkenleung5e28%2Fgrepr'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 76c743a9b704f929efc7c095ccb80477c6d4693c
[INFO] checking kenleung5e28/grepr against master#22572d0994593197593e2a1b7b18d720a9a349a7 for pr-126452-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkenleung5e28%2Fgrepr" "/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/kenleung5e28/grepr on toolchain 22572d0994593197593e2a1b7b18d720a9a349a7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kenleung5e28/grepr
[INFO] finished tweaking git repo https://github.com/kenleung5e28/grepr
[INFO] tweaked toml for git repo https://github.com/kenleung5e28/grepr written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/kenleung5e28/grepr 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" "+22572d0994593197593e2a1b7b18d720a9a349a7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded predicates-tree v1.0.5
[INFO] [stderr]   Downloaded termtree v0.2.4
[INFO] [stderr]   Downloaded predicates-core v1.0.3
[INFO] [stderr]   Downloaded predicates v2.1.1
[INFO] [stderr]   Downloaded assert_cmd v2.0.4
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c0604565d939b2a6cd3ef1fd4ae2b3c94ff12175636d893eb76bfc9c949ce5c0
[INFO] running `Command { std: "docker" "start" "-a" "c0604565d939b2a6cd3ef1fd4ae2b3c94ff12175636d893eb76bfc9c949ce5c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c0604565d939b2a6cd3ef1fd4ae2b3c94ff12175636d893eb76bfc9c949ce5c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c0604565d939b2a6cd3ef1fd4ae2b3c94ff12175636d893eb76bfc9c949ce5c0", kill_on_drop: false }`
[INFO] [stdout] c0604565d939b2a6cd3ef1fd4ae2b3c94ff12175636d893eb76bfc9c949ce5c0
[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" "-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" "+22572d0994593197593e2a1b7b18d720a9a349a7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dc48274b4fd6b194b95e6f0fff233be6d06c401580a7a2d8686b8016cfdb25a1
[INFO] running `Command { std: "docker" "start" "-a" "dc48274b4fd6b194b95e6f0fff233be6d06c401580a7a2d8686b8016cfdb25a1", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.120
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling cc v1.0.73
[INFO] [stderr]     Checking unicode-width v0.1.9
[INFO] [stderr]     Checking predicates-core v1.0.3
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking itertools v0.10.3
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]     Checking termtree v0.2.4
[INFO] [stderr]     Checking difflib v0.4.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.16
[INFO] [stderr]     Checking predicates-tree v1.0.5
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking bstr v0.2.17
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling sys-info v0.9.1
[INFO] [stderr]     Checking getrandom v0.2.5
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking float-cmp v0.9.0
[INFO] [stderr]     Checking predicates v2.1.1
[INFO] [stderr]     Checking assert_cmd v2.0.4
[INFO] [stderr]     Checking grepr v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.06s
[INFO] running `Command { std: "docker" "inspect" "dc48274b4fd6b194b95e6f0fff233be6d06c401580a7a2d8686b8016cfdb25a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dc48274b4fd6b194b95e6f0fff233be6d06c401580a7a2d8686b8016cfdb25a1", kill_on_drop: false }`
[INFO] [stdout] dc48274b4fd6b194b95e6f0fff233be6d06c401580a7a2d8686b8016cfdb25a1
[INFO] checking kenleung5e28/grepr against try#6289438dbad80b1a0029c66dd3f6abf57c2c51be for pr-126452-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkenleung5e28%2Fgrepr" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kenleung5e28/grepr on toolchain 6289438dbad80b1a0029c66dd3f6abf57c2c51be
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kenleung5e28/grepr
[INFO] finished tweaking git repo https://github.com/kenleung5e28/grepr
[INFO] tweaked toml for git repo https://github.com/kenleung5e28/grepr written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/kenleung5e28/grepr 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" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b71ddfa7a5f30813f0f8771e7481452c12dd4f839432e577d74b2fe62e36ff1f
[INFO] running `Command { std: "docker" "start" "-a" "b71ddfa7a5f30813f0f8771e7481452c12dd4f839432e577d74b2fe62e36ff1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b71ddfa7a5f30813f0f8771e7481452c12dd4f839432e577d74b2fe62e36ff1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b71ddfa7a5f30813f0f8771e7481452c12dd4f839432e577d74b2fe62e36ff1f", kill_on_drop: false }`
[INFO] [stdout] b71ddfa7a5f30813f0f8771e7481452c12dd4f839432e577d74b2fe62e36ff1f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3bb97153950ccf722772f299afe2cf86344579212d75ff706fc2bffe2a7da773
[INFO] running `Command { std: "docker" "start" "-a" "3bb97153950ccf722772f299afe2cf86344579212d75ff706fc2bffe2a7da773", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.120
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling cc v1.0.73
[INFO] [stderr]     Checking unicode-width v0.1.9
[INFO] [stderr]     Checking predicates-core v1.0.3
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]     Checking itertools v0.10.3
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]     Checking difflib v0.4.0
[INFO] [stderr]     Checking termtree v0.2.4
[INFO] [stderr]     Checking ppv-lite86 v0.2.16
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking predicates-tree v1.0.5
[INFO] [stderr]     Checking bstr v0.2.17
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]     Checking getrandom v0.2.5
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]    Compiling sys-info v0.9.1
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking float-cmp v0.9.0
[INFO] [stderr]     Checking predicates v2.1.1
[INFO] [stderr]     Checking assert_cmd v2.0.4
[INFO] [stderr]     Checking grepr v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.58s
[INFO] running `Command { std: "docker" "inspect" "3bb97153950ccf722772f299afe2cf86344579212d75ff706fc2bffe2a7da773", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3bb97153950ccf722772f299afe2cf86344579212d75ff706fc2bffe2a7da773", kill_on_drop: false }`
[INFO] [stdout] 3bb97153950ccf722772f299afe2cf86344579212d75ff706fc2bffe2a7da773