[INFO] fetching crate mreplace 0.1.7...
[INFO] testing mreplace-0.1.7 against 1.91.0 for beta-1.92-2
[INFO] extracting crate mreplace 0.1.7 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate mreplace 0.1.7
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate mreplace 0.1.7
[INFO] tweaked toml for crates.io crate mreplace 0.1.7 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate mreplace 0.1.7 on toolchain 1.91.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "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" "+1.91.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 25 packages to latest compatible versions
[INFO] [stderr]       Adding const-str v0.5.7 (available: v0.7.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded daachorse v1.0.0
[INFO] [stderr]   Downloaded const-str v0.5.7
[INFO] [stderr]   Downloaded static_init_macro v1.0.4
[INFO] [stderr]   Downloaded static_init v1.0.4
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ac42331c4b54ba2b841ae68efd2f24afeeed09789c99065ec30688a233c5482d
[INFO] running `Command { std: "docker" "start" "-a" "ac42331c4b54ba2b841ae68efd2f24afeeed09789c99065ec30688a233c5482d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ac42331c4b54ba2b841ae68efd2f24afeeed09789c99065ec30688a233c5482d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac42331c4b54ba2b841ae68efd2f24afeeed09789c99065ec30688a233c5482d", kill_on_drop: false }`
[INFO] [stdout] ac42331c4b54ba2b841ae68efd2f24afeeed09789c99065ec30688a233c5482d
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 200b188e0139e501c289438109525479ea3412d28716e5731f164a1aaa28e8f6
[INFO] running `Command { std: "docker" "start" "-a" "200b188e0139e501c289438109525479ea3412d28716e5731f164a1aaa28e8f6", kill_on_drop: false }`
[INFO] [stderr]    Compiling const-str v0.5.7
[INFO] [stderr]    Compiling daachorse v1.0.0
[INFO] [stderr]    Compiling mreplace v0.1.7 (/opt/rustwide/workdir)
[INFO] [stderr] error: could not compile `mreplace` (lib) due to 2 previous errors
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(doc_cfg)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(slice_index_methods)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "200b188e0139e501c289438109525479ea3412d28716e5731f164a1aaa28e8f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "200b188e0139e501c289438109525479ea3412d28716e5731f164a1aaa28e8f6", kill_on_drop: false }`
[INFO] [stdout] 200b188e0139e501c289438109525479ea3412d28716e5731f164a1aaa28e8f6