[INFO] fetching crate prometheus-client-derive-text-encode 0.3.0...
[INFO] testing prometheus-client-derive-text-encode-0.3.0 against try#8de4c7234dd9b97c9d76b58671343fdbbc9a433e+target=x86_64-unknown-linux-musl for musl_upgrade_1_2_5_with_libc_patch_0
[INFO] extracting crate prometheus-client-derive-text-encode 0.3.0 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate prometheus-client-derive-text-encode 0.3.0
[INFO] finished tweaking crates.io crate prometheus-client-derive-text-encode 0.3.0
[INFO] tweaked toml for crates.io crate prometheus-client-derive-text-encode 0.3.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate prometheus-client-derive-text-encode 0.3.0 on toolchain 8de4c7234dd9b97c9d76b58671343fdbbc9a433e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "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" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 4 packages to latest compatible versions
[INFO] [stderr]       Adding syn v1.0.109 (available: v2.0.104)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "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-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4582a830de1b199c50e5fcb98d3f2d33ace940501461ee1c0777ff3e1830a43e
[INFO] running `Command { std: "docker" "start" "-a" "4582a830de1b199c50e5fcb98d3f2d33ace940501461ee1c0777ff3e1830a43e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4582a830de1b199c50e5fcb98d3f2d33ace940501461ee1c0777ff3e1830a43e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4582a830de1b199c50e5fcb98d3f2d33ace940501461ee1c0777ff3e1830a43e", kill_on_drop: false }`
[INFO] [stdout] 4582a830de1b199c50e5fcb98d3f2d33ace940501461ee1c0777ff3e1830a43e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "build" "--frozen" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] d4512ab18f6e4f45e2ec96702692f8f6b5f475abff785e76fdb8a6fc0fc14e56
[INFO] running `Command { std: "docker" "start" "-a" "d4512ab18f6e4f45e2ec96702692f8f6b5f475abff785e76fdb8a6fc0fc14e56", kill_on_drop: false }`
[INFO] [stderr]    Compiling prometheus-client-derive-text-encode v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.77s
[INFO] running `Command { std: "docker" "inspect" "d4512ab18f6e4f45e2ec96702692f8f6b5f475abff785e76fdb8a6fc0fc14e56", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d4512ab18f6e4f45e2ec96702692f8f6b5f475abff785e76fdb8a6fc0fc14e56", kill_on_drop: false }`
[INFO] [stdout] d4512ab18f6e4f45e2ec96702692f8f6b5f475abff785e76fdb8a6fc0fc14e56
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "test" "--frozen" "--no-run" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] e870017c1b81de6899d396af359de634b44df6e5c49a49ffe7cc9db2a7d18b2d
[INFO] running `Command { std: "docker" "start" "-a" "e870017c1b81de6899d396af359de634b44df6e5c49a49ffe7cc9db2a7d18b2d", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.95
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling prometheus-client-derive-text-encode v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `prometheus_client`
[INFO] [stdout]  --> tests/lib.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use prometheus_client::encoding::text::{encode, Encode};
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^ use of unresolved module or unlinked crate `prometheus_client`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `prometheus_client`, use `cargo add prometheus_client` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `prometheus_client`
[INFO] [stdout]  --> tests/lib.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use prometheus_client::metrics::counter::Counter;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^ use of unresolved module or unlinked crate `prometheus_client`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `prometheus_client`, use `cargo add prometheus_client` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `prometheus_client`
[INFO] [stdout]  --> tests/lib.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use prometheus_client::metrics::family::Family;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^ use of unresolved module or unlinked crate `prometheus_client`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `prometheus_client`, use `cargo add prometheus_client` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `prometheus_client`
[INFO] [stdout]  --> tests/lib.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use prometheus_client::registry::Registry;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^ use of unresolved module or unlinked crate `prometheus_client`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `prometheus_client`, use `cargo add prometheus_client` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `encode` found for struct `remap_keyword_identifiers::Labels` in the current scope
[INFO] [stdout]   --> tests/lib.rs:61:12
[INFO] [stdout]    |
[INFO] [stdout] 47 |     struct Labels {
[INFO] [stdout]    |     ------------- method `encode` not found for this struct
[INFO] [stdout] ...
[INFO] [stdout] 61 |     labels.encode(&mut buffer).unwrap();
[INFO] [stdout]    |            ^^^^^^ method not found in `remap_keyword_identifiers::Labels`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0433, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0433`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `prometheus-client-derive-text-encode` (test "lib") due to 5 previous errors
[INFO] running `Command { std: "docker" "inspect" "e870017c1b81de6899d396af359de634b44df6e5c49a49ffe7cc9db2a7d18b2d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e870017c1b81de6899d396af359de634b44df6e5c49a49ffe7cc9db2a7d18b2d", kill_on_drop: false }`
[INFO] [stdout] e870017c1b81de6899d396af359de634b44df6e5c49a49ffe7cc9db2a7d18b2d