[INFO] fetching crate memstream 0.0.1...
[INFO] testing memstream-0.0.1 against beta-2025-10-28 for beta-1.92-2
[INFO] extracting crate memstream 0.0.1 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate memstream 0.0.1
[INFO] finished tweaking crates.io crate memstream 0.0.1
[INFO] tweaked toml for crates.io crate memstream 0.0.1 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate memstream 0.0.1 on toolchain beta-2025-10-28
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "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" "+beta-2025-10-28" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8fad1acdfadb049c661a7498df6523e6695cd18577baf58e4f76e72444657167
[INFO] running `Command { std: "docker" "start" "-a" "8fad1acdfadb049c661a7498df6523e6695cd18577baf58e4f76e72444657167", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8fad1acdfadb049c661a7498df6523e6695cd18577baf58e4f76e72444657167", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8fad1acdfadb049c661a7498df6523e6695cd18577baf58e4f76e72444657167", kill_on_drop: false }`
[INFO] [stdout] 8fad1acdfadb049c661a7498df6523e6695cd18577baf58e4f76e72444657167
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 759b2b5606f11550aabf9b34110a527a93abac0280f10c4f2be2aac0a98e9890
[INFO] running `Command { std: "docker" "start" "-a" "759b2b5606f11550aabf9b34110a527a93abac0280f10c4f2be2aac0a98e9890", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]    Compiling memstream v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unknown lint: `missing_doc`
[INFO] [stdout]  --> src/lib.rs:1:9
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![deny(missing_doc)]
[INFO] [stdout]   |         ^^^^^^^^^^^ help: did you mean: `missing_docs`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unknown_lints)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.17s
[INFO] running `Command { std: "docker" "inspect" "759b2b5606f11550aabf9b34110a527a93abac0280f10c4f2be2aac0a98e9890", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "759b2b5606f11550aabf9b34110a527a93abac0280f10c4f2be2aac0a98e9890", kill_on_drop: false }`
[INFO] [stdout] 759b2b5606f11550aabf9b34110a527a93abac0280f10c4f2be2aac0a98e9890
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 704e6041689de4c5bea4e44691b94ad6a81542a5fb62324776d9f3c674a56fd2
[INFO] running `Command { std: "docker" "start" "-a" "704e6041689de4c5bea4e44691b94ad6a81542a5fb62324776d9f3c674a56fd2", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]    Compiling memstream v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unknown lint: `missing_doc`
[INFO] [stdout]  --> src/lib.rs:1:9
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![deny(missing_doc)]
[INFO] [stdout]   |         ^^^^^^^^^^^ help: did you mean: `missing_docs`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unknown_lints)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unknown lint: `missing_doc`
[INFO] [stdout]  --> src/lib.rs:1:9
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![deny(missing_doc)]
[INFO] [stdout]   |         ^^^^^^^^^^^ help: did you mean: `missing_docs`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unknown_lints)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature `test`
[INFO] [stdout]   --> src/lib.rs:73:5
[INFO] [stdout]    |
[INFO] [stdout] 73 |     extern crate test;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #50297 <https://github.com/rust-lang/rust/issues/50297> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `write` found for struct `MemStream` in the current scope
[INFO] [stdout]   --> src/lib.rs:79:16
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct MemStream {
[INFO] [stdout]    | -------------------- method `write` not found for this struct
[INFO] [stdout] ...
[INFO] [stdout] 79 |         stream.write([0, 1, 2, 3]).unwrap();
[INFO] [stdout]    |                ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   --> /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/std/src/io/mod.rs:1724:8
[INFO] [stdout]    |
[INFO] [stdout]    = note: the method is available for `MemStream` here
[INFO] [stdout]    |
[INFO] [stdout]    = help: items from traits can only be used if the trait is in scope
[INFO] [stdout] help: trait `Write` which provides `write` is implemented but not in scope; perhaps you want to import it
[INFO] [stdout]    |
[INFO] [stdout] 73 +     use std::io::Write;
[INFO] [stdout]    |
[INFO] [stdout] help: there is a method `write_all` with a similar name
[INFO] [stdout]    |
[INFO] [stdout] 79 |         stream.write_all([0, 1, 2, 3]).unwrap();
[INFO] [stdout]    |                     ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `write` found for struct `MemStream` in the current scope
[INFO] [stdout]   --> src/lib.rs:80:16
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct MemStream {
[INFO] [stdout]    | -------------------- method `write` not found for this struct
[INFO] [stdout] ...
[INFO] [stdout] 80 |         stream.write([4, 5, 6, 7]).unwrap();
[INFO] [stdout]    |                ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   --> /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/std/src/io/mod.rs:1724:8
[INFO] [stdout]    |
[INFO] [stdout]    = note: the method is available for `MemStream` here
[INFO] [stdout]    |
[INFO] [stdout]    = help: items from traits can only be used if the trait is in scope
[INFO] [stdout] help: trait `Write` which provides `write` is implemented but not in scope; perhaps you want to import it
[INFO] [stdout]    |
[INFO] [stdout] 73 +     use std::io::Write;
[INFO] [stdout]    |
[INFO] [stdout] help: there is a method `write_all` with a similar name
[INFO] [stdout]    |
[INFO] [stdout] 80 |         stream.write_all([4, 5, 6, 7]).unwrap();
[INFO] [stdout]    |                     ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `read` found for struct `MemStream` in the current scope
[INFO] [stdout]   --> src/lib.rs:84:27
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct MemStream {
[INFO] [stdout]    | -------------------- method `read` not found for this struct
[INFO] [stdout] ...
[INFO] [stdout] 84 |         assert_eq!(stream.read(buf), Ok(0));
[INFO] [stdout]    |                           ^^^^ method not found in `MemStream`
[INFO] [stdout]    |
[INFO] [stdout]   --> /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/std/src/io/mod.rs:813:8
[INFO] [stdout]    |
[INFO] [stdout]    = note: the method is available for `MemStream` here
[INFO] [stdout]    |
[INFO] [stdout]    = help: items from traits can only be used if the trait is in scope
[INFO] [stdout] help: trait `Read` which provides `read` is implemented but not in scope; perhaps you want to import it
[INFO] [stdout]    |
[INFO] [stdout] 73 +     use std::io::Read;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `read` found for struct `MemStream` in the current scope
[INFO] [stdout]   --> src/lib.rs:86:27
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct MemStream {
[INFO] [stdout]    | -------------------- method `read` not found for this struct
[INFO] [stdout] ...
[INFO] [stdout] 86 |         assert_eq!(stream.read(buf), Ok(1));
[INFO] [stdout]    |                           ^^^^ method not found in `MemStream`
[INFO] [stdout]    |
[INFO] [stdout]   --> /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/std/src/io/mod.rs:813:8
[INFO] [stdout]    |
[INFO] [stdout]    = note: the method is available for `MemStream` here
[INFO] [stdout]    |
[INFO] [stdout]    = help: items from traits can only be used if the trait is in scope
[INFO] [stdout] help: trait `Read` which provides `read` is implemented but not in scope; perhaps you want to import it
[INFO] [stdout]    |
[INFO] [stdout] 73 +     use std::io::Read;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/lib.rs:89:27
[INFO] [stdout]    |
[INFO] [stdout] 89 |         let mut buf = [0, ..4];
[INFO] [stdout]    |                           ^^^ expected integer, found `RangeTo<{integer}>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected type `{integer}`
[INFO] [stdout]             found struct `RangeTo<{integer}>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `read` found for struct `MemStream` in the current scope
[INFO] [stdout]   --> src/lib.rs:90:27
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct MemStream {
[INFO] [stdout]    | -------------------- method `read` not found for this struct
[INFO] [stdout] ...
[INFO] [stdout] 90 |         assert_eq!(stream.read(buf), Ok(4));
[INFO] [stdout]    |                           ^^^^ method not found in `MemStream`
[INFO] [stdout]    |
[INFO] [stdout]   --> /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/std/src/io/mod.rs:813:8
[INFO] [stdout]    |
[INFO] [stdout]    = note: the method is available for `MemStream` here
[INFO] [stdout]    |
[INFO] [stdout]    = help: items from traits can only be used if the trait is in scope
[INFO] [stdout] help: trait `Read` which provides `read` is implemented but not in scope; perhaps you want to import it
[INFO] [stdout]    |
[INFO] [stdout] 73 +     use std::io::Read;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `read` found for struct `MemStream` in the current scope
[INFO] [stdout]   --> src/lib.rs:93:27
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct MemStream {
[INFO] [stdout]    | -------------------- method `read` not found for this struct
[INFO] [stdout] ...
[INFO] [stdout] 93 |         assert_eq!(stream.read(buf), Ok(3));
[INFO] [stdout]    |                           ^^^^ method not found in `MemStream`
[INFO] [stdout]    |
[INFO] [stdout]   --> /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/std/src/io/mod.rs:813:8
[INFO] [stdout]    |
[INFO] [stdout]    = note: the method is available for `MemStream` here
[INFO] [stdout]    |
[INFO] [stdout]    = help: items from traits can only be used if the trait is in scope
[INFO] [stdout] help: trait `Read` which provides `read` is implemented but not in scope; perhaps you want to import it
[INFO] [stdout]    |
[INFO] [stdout] 73 +     use std::io::Read;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `read` found for struct `MemStream` in the current scope
[INFO] [stdout]   --> src/lib.rs:96:24
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct MemStream {
[INFO] [stdout]    | -------------------- method `read` not found for this struct
[INFO] [stdout] ...
[INFO] [stdout] 96 |         assert!(stream.read(buf).is_err());
[INFO] [stdout]    |                        ^^^^ method not found in `MemStream`
[INFO] [stdout]    |
[INFO] [stdout]   --> /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/std/src/io/mod.rs:813:8
[INFO] [stdout]    |
[INFO] [stdout]    = note: the method is available for `MemStream` here
[INFO] [stdout]    |
[INFO] [stdout]    = help: items from traits can only be used if the trait is in scope
[INFO] [stdout] help: trait `Read` which provides `read` is implemented but not in scope; perhaps you want to import it
[INFO] [stdout]    |
[INFO] [stdout] 73 +     use std::io::Read;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0308, E0599, E0658.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `memstream` (lib test) due to 9 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "704e6041689de4c5bea4e44691b94ad6a81542a5fb62324776d9f3c674a56fd2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "704e6041689de4c5bea4e44691b94ad6a81542a5fb62324776d9f3c674a56fd2", kill_on_drop: false }`
[INFO] [stdout] 704e6041689de4c5bea4e44691b94ad6a81542a5fb62324776d9f3c674a56fd2
