[INFO] fetching crate mcp-client 0.1.0...
[INFO] testing mcp-client-0.1.0 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate mcp-client 0.1.0 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate mcp-client 0.1.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate mcp-client 0.1.0
[INFO] tweaked toml for crates.io crate mcp-client 0.1.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate mcp-client 0.1.0 on toolchain beta-2025-09-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate mcp-client 0.1.0 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" "+beta-2025-09-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7287785f835b810b60d9af83822a6efdef90a60a382636bd99a4548c01ca8467
[INFO] running `Command { std: "docker" "start" "-a" "7287785f835b810b60d9af83822a6efdef90a60a382636bd99a4548c01ca8467", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7287785f835b810b60d9af83822a6efdef90a60a382636bd99a4548c01ca8467", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7287785f835b810b60d9af83822a6efdef90a60a382636bd99a4548c01ca8467", kill_on_drop: false }`
[INFO] [stdout] 7287785f835b810b60d9af83822a6efdef90a60a382636bd99a4548c01ca8467
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] eb8970a5a2e51b99caafac60257219feb5f5cf4279aa756ca47c42d66706d9d0
[INFO] running `Command { std: "docker" "start" "-a" "eb8970a5a2e51b99caafac60257219feb5f5cf4279aa756ca47c42d66706d9d0", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.170
[INFO] [stderr]    Compiling smallvec v1.14.0
[INFO] [stderr]    Compiling bytes v1.10.0
[INFO] [stderr]    Compiling once_cell v1.20.3
[INFO] [stderr]    Compiling log v0.4.26
[INFO] [stderr]    Compiling itoa v1.0.14
[INFO] [stderr]    Compiling litemap v0.7.5
[INFO] [stderr]    Compiling syn v2.0.98
[INFO] [stderr]    Compiling cc v1.2.15
[INFO] [stderr]    Compiling serde v1.0.218
[INFO] [stderr]    Compiling httparse v1.10.0
[INFO] [stderr]    Compiling rustls v0.21.12
[INFO] [stderr]    Compiling indexmap v2.7.1
[INFO] [stderr]    Compiling ryu v1.0.19
[INFO] [stderr]    Compiling byteorder v1.5.0
[INFO] [stderr]    Compiling serde_json v1.0.139
[INFO] [stderr]    Compiling rustls-native-certs v0.6.3
[INFO] [stderr]    Compiling tracing-core v0.1.33
[INFO] [stderr]    Compiling schemars v0.8.22
[INFO] [stderr]    Compiling anyhow v1.0.96
[INFO] [stderr]    Compiling iana-time-zone v0.1.61
[INFO] [stderr]    Compiling dyn-clone v1.0.18
[INFO] [stderr]    Compiling thread_local v1.1.8
[INFO] [stderr]    Compiling encoding_rs v0.8.35
[INFO] [stderr]    Compiling webpki-roots v0.25.4
[INFO] [stderr]    Compiling tracing-log v0.2.0
[INFO] [stderr]    Compiling http v0.2.12
[INFO] [stderr]    Compiling parking_lot_core v0.9.10
[INFO] [stderr]    Compiling getrandom v0.2.15
[INFO] [stderr]    Compiling mio v1.0.3
[INFO] [stderr]    Compiling signal-hook-registry v1.4.2
[INFO] [stderr]    Compiling socket2 v0.5.8
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling ring v0.17.11
[INFO] [stderr]    Compiling parking_lot v0.12.3
[INFO] [stderr]    Compiling http-body v0.4.6
[INFO] [stderr]    Compiling synstructure v0.13.1
[INFO] [stderr]    Compiling serde_derive_internals v0.29.1
[INFO] [stderr]    Compiling zerofrom-derive v0.1.6
[INFO] [stderr]    Compiling yoke-derive v0.7.5
[INFO] [stderr]    Compiling zerovec-derive v0.10.3
[INFO] [stderr]    Compiling displaydoc v0.2.5
[INFO] [stderr]    Compiling tokio-macros v2.5.0
[INFO] [stderr]    Compiling futures-macro v0.3.31
[INFO] [stderr]    Compiling icu_provider_macros v1.5.0
[INFO] [stderr]    Compiling tracing-attributes v0.1.28
[INFO] [stderr]    Compiling serde_derive v1.0.218
[INFO] [stderr]    Compiling zerocopy-derive v0.7.35
[INFO] [stderr]    Compiling pin-project-internal v1.1.9
[INFO] [stderr]    Compiling thiserror-impl v1.0.69
[INFO] [stderr]    Compiling async-trait v0.1.86
[INFO] [stderr]    Compiling schemars_derive v0.8.22
[INFO] [stderr]    Compiling futures-util v0.3.31
[INFO] [stderr]    Compiling tokio v1.43.0
[INFO] [stderr]    Compiling zerocopy v0.7.35
[INFO] [stderr]    Compiling pin-project v1.1.9
[INFO] [stderr]    Compiling zerofrom v0.1.6
[INFO] [stderr]    Compiling tracing v0.1.41
[INFO] [stderr]    Compiling yoke v0.7.5
[INFO] [stderr]    Compiling zerovec v0.10.4
[INFO] [stderr]    Compiling thiserror v1.0.69
[INFO] [stderr]    Compiling tracing-subscriber v0.3.19
[INFO] [stderr]    Compiling sct v0.7.1
[INFO] [stderr]    Compiling rustls-webpki v0.101.7
[INFO] [stderr]    Compiling ppv-lite86 v0.2.20
[INFO] [stderr]    Compiling tinystr v0.7.6
[INFO] [stderr]    Compiling icu_collections v1.5.0
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling icu_locid v1.5.0
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling icu_provider v1.5.0
[INFO] [stderr]    Compiling icu_locid_transform v1.5.0
[INFO] [stderr]    Compiling futures-executor v0.3.31
[INFO] [stderr]    Compiling futures v0.3.31
[INFO] [stderr]    Compiling icu_properties v1.5.1
[INFO] [stderr]    Compiling chrono v0.4.40
[INFO] [stderr]    Compiling serde_urlencoded v0.7.1
[INFO] [stderr]    Compiling tokio-util v0.7.13
[INFO] [stderr]    Compiling tokio-rustls v0.24.1
[INFO] [stderr]    Compiling tokio-io-timeout v1.2.0
[INFO] [stderr]    Compiling tower v0.4.13
[INFO] [stderr]    Compiling h2 v0.3.26
[INFO] [stderr]    Compiling icu_normalizer v1.5.0
[INFO] [stderr]    Compiling idna_adapter v1.2.0
[INFO] [stderr]    Compiling idna v1.0.3
[INFO] [stderr]    Compiling url v2.5.4
[INFO] [stderr]    Compiling mcp-spec v0.1.0
[INFO] [stderr]    Compiling hyper v0.14.32
[INFO] [stderr]    Compiling hyper-rustls v0.24.2
[INFO] [stderr]    Compiling hyper-timeout v0.4.1
[INFO] [stderr]    Compiling eventsource-client v0.12.2
[INFO] [stderr]    Compiling reqwest v0.11.27
[INFO] [stderr]    Compiling mcp-client v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 00s
[INFO] running `Command { std: "docker" "inspect" "eb8970a5a2e51b99caafac60257219feb5f5cf4279aa756ca47c42d66706d9d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eb8970a5a2e51b99caafac60257219feb5f5cf4279aa756ca47c42d66706d9d0", kill_on_drop: false }`
[INFO] [stdout] eb8970a5a2e51b99caafac60257219feb5f5cf4279aa756ca47c42d66706d9d0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7d4d0262362ed0d0b3afb66b26bd0eb2a1bdef387b82c636049e5da9e4e41089
[INFO] running `Command { std: "docker" "start" "-a" "7d4d0262362ed0d0b3afb66b26bd0eb2a1bdef387b82c636049e5da9e4e41089", kill_on_drop: false }`
[INFO] [stderr]    Compiling mcp-client v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 6.67s
[INFO] running `Command { std: "docker" "inspect" "7d4d0262362ed0d0b3afb66b26bd0eb2a1bdef387b82c636049e5da9e4e41089", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d4d0262362ed0d0b3afb66b26bd0eb2a1bdef387b82c636049e5da9e4e41089", kill_on_drop: false }`
[INFO] [stdout] 7d4d0262362ed0d0b3afb66b26bd0eb2a1bdef387b82c636049e5da9e4e41089
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 7eb9a1e190557a7055e784adf474325b25e677ed6336efb8c8558038caa68920
[INFO] running `Command { std: "docker" "start" "-a" "7eb9a1e190557a7055e784adf474325b25e677ed6336efb8c8558038caa68920", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.23s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/mcp_client-d764f68768a00371)
[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] [stderr]    Doc-tests mcp_client
[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" "7eb9a1e190557a7055e784adf474325b25e677ed6336efb8c8558038caa68920", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7eb9a1e190557a7055e784adf474325b25e677ed6336efb8c8558038caa68920", kill_on_drop: false }`
[INFO] [stdout] 7eb9a1e190557a7055e784adf474325b25e677ed6336efb8c8558038caa68920