[INFO] fetching crate tnetstring 0.2.0...
[INFO] checking tnetstring-0.2.0 against master#ff1737bb00913444173658b4e0b274fd79aabf66 for pr-132712-1
[INFO] extracting crate tnetstring 0.2.0 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate tnetstring 0.2.0 on toolchain ff1737bb00913444173658b4e0b274fd79aabf66
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ff1737bb00913444173658b4e0b274fd79aabf66" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tnetstring 0.2.0
[INFO] finished tweaking crates.io crate tnetstring 0.2.0
[INFO] tweaked toml for crates.io crate tnetstring 0.2.0 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ff1737bb00913444173658b4e0b274fd79aabf66" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 7 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ff1737bb00913444173658b4e0b274fd79aabf66" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+ff1737bb00913444173658b4e0b274fd79aabf66" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 20723b6b00b17cb9db6be85a7ed29835daf4b30598a315ee410ff6add0fbe556
[INFO] running `Command { std: "docker" "start" "-a" "20723b6b00b17cb9db6be85a7ed29835daf4b30598a315ee410ff6add0fbe556", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "20723b6b00b17cb9db6be85a7ed29835daf4b30598a315ee410ff6add0fbe556", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "20723b6b00b17cb9db6be85a7ed29835daf4b30598a315ee410ff6add0fbe556", kill_on_drop: false }`
[INFO] [stdout] 20723b6b00b17cb9db6be85a7ed29835daf4b30598a315ee410ff6add0fbe556
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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=allow" "-e" "RUSTDOCFLAGS=--cap-lints=allow" "-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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+ff1737bb00913444173658b4e0b274fd79aabf66" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ebb0ed6565290de8a6496460fd0b67c554a8f73055302a859cacccd492b82cc7
[INFO] running `Command { std: "docker" "start" "-a" "ebb0ed6565290de8a6496460fd0b67c554a8f73055302a859cacccd492b82cc7", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.92
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]    Compiling syn v2.0.89
[INFO] [stderr]    Compiling serde_derive v1.0.215
[INFO] [stderr]     Checking serde v1.0.215
[INFO] [stderr]     Checking tnetstring v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0283]: type annotations needed
[INFO] [stdout]   --> src/ser.rs:49:18
[INFO] [stdout]    |
[INFO] [stdout] 49 |         .map(|x| String::from(x.as_ref()))
[INFO] [stdout]    |                  ^^^^^^ cannot infer type for reference `&_`
[INFO] [stdout]    |
[INFO] [stdout]    = note: multiple `impl`s satisfying `std::string::String: From<&_>` found in the `alloc` crate:
[INFO] [stdout]            - impl From<&std::string::String> for std::string::String;
[INFO] [stdout]            - impl From<&str> for std::string::String;
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0283]: type annotations needed
[INFO] [stdout]   --> src/ser.rs:49:33
[INFO] [stdout]    |
[INFO] [stdout] 49 |         .map(|x| String::from(x.as_ref()))
[INFO] [stdout]    |                                 ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: multiple `impl`s satisfying `std::string::String: AsRef<_>` found in the following crates: `alloc`, `std`:
[INFO] [stdout]            - impl AsRef<OsStr> for std::string::String;
[INFO] [stdout]            - impl AsRef<Path> for std::string::String;
[INFO] [stdout]            - impl AsRef<[u8]> for std::string::String;
[INFO] [stdout]            - impl AsRef<str> for std::string::String;
[INFO] [stdout] help: try using a fully qualified path to specify the expected types
[INFO] [stdout]    |
[INFO] [stdout] 49 |         .map(|x| String::from(<std::string::String as AsRef<T>>::as_ref(x)))
[INFO] [stdout]    |                               ++++++++++++++++++++++++++++++++++++++++++ ~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0283`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tnetstring` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0283]: type annotations needed
[INFO] [stdout]   --> src/ser.rs:49:18
[INFO] [stdout]    |
[INFO] [stdout] 49 |         .map(|x| String::from(x.as_ref()))
[INFO] [stdout]    |                  ^^^^^^ cannot infer type for reference `&_`
[INFO] [stdout]    |
[INFO] [stdout]    = note: multiple `impl`s satisfying `std::string::String: From<&_>` found in the `alloc` crate:
[INFO] [stdout]            - impl From<&std::string::String> for std::string::String;
[INFO] [stdout]            - impl From<&str> for std::string::String;
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0283]: type annotations needed
[INFO] [stdout]   --> src/ser.rs:49:33
[INFO] [stdout]    |
[INFO] [stdout] 49 |         .map(|x| String::from(x.as_ref()))
[INFO] [stdout]    |                                 ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: multiple `impl`s satisfying `std::string::String: AsRef<_>` found in the following crates: `alloc`, `std`:
[INFO] [stdout]            - impl AsRef<OsStr> for std::string::String;
[INFO] [stdout]            - impl AsRef<Path> for std::string::String;
[INFO] [stdout]            - impl AsRef<[u8]> for std::string::String;
[INFO] [stdout]            - impl AsRef<str> for std::string::String;
[INFO] [stdout] help: try using a fully qualified path to specify the expected types
[INFO] [stdout]    |
[INFO] [stdout] 49 |         .map(|x| String::from(<std::string::String as AsRef<T>>::as_ref(x)))
[INFO] [stdout]    |                               ++++++++++++++++++++++++++++++++++++++++++ ~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0283`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tnetstring` (lib test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "ebb0ed6565290de8a6496460fd0b67c554a8f73055302a859cacccd492b82cc7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ebb0ed6565290de8a6496460fd0b67c554a8f73055302a859cacccd492b82cc7", kill_on_drop: false }`
[INFO] [stdout] ebb0ed6565290de8a6496460fd0b67c554a8f73055302a859cacccd492b82cc7