[INFO] fetching crate memstream 0.0.1...
[INFO] checking memstream-0.0.1 against 1.55.0 for beta-1.56-3
[INFO] extracting crate memstream 0.0.1 into /workspace/builds/worker-27/source
[INFO] validating manifest of crates.io crate memstream 0.0.1 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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-27/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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-27/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8ea327907295db47eae7dad0adb4b1555c25a3e06a37993ebfc4af80ad6a4696
[INFO] running `Command { std: "docker" "start" "-a" "8ea327907295db47eae7dad0adb4b1555c25a3e06a37993ebfc4af80ad6a4696", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8ea327907295db47eae7dad0adb4b1555c25a3e06a37993ebfc4af80ad6a4696", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8ea327907295db47eae7dad0adb4b1555c25a3e06a37993ebfc4af80ad6a4696", kill_on_drop: false }`
[INFO] [stdout] 8ea327907295db47eae7dad0adb4b1555c25a3e06a37993ebfc4af80ad6a4696
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 650f45f563c35053f7715a343b70b9215ca9ae084e4642ff1abd9824fa80fae0
[INFO] running `Command { std: "docker" "start" "-a" "650f45f563c35053f7715a343b70b9215ca9ae084e4642ff1abd9824fa80fae0", kill_on_drop: false }`
[INFO] [stderr]     Checking 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] 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] 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: 1 warning emitted
[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
[INFO] [stdout] ...
[INFO] [stdout] 79   |         stream.write([0, 1, 2, 3]).unwrap();
[INFO] [stdout]      |                ^^^^^ method not found in `MemStream`
[INFO] [stdout]      |
[INFO] [stdout]      = help: items from traits can only be used if the trait is in scope
[INFO] [stdout]      = note: the following trait is implemented but not in scope; perhaps add a `use` for it:
[INFO] [stdout]              `use std::io::Write;`
[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
[INFO] [stdout] ...
[INFO] [stdout] 80   |         stream.write([4, 5, 6, 7]).unwrap();
[INFO] [stdout]      |                ^^^^^ method not found in `MemStream`
[INFO] [stdout]      |
[INFO] [stdout]      = help: items from traits can only be used if the trait is in scope
[INFO] [stdout]      = note: the following trait is implemented but not in scope; perhaps add a `use` for it:
[INFO] [stdout]              `use std::io::Write;`
[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
[INFO] [stdout] ...
[INFO] [stdout] 84  |         assert_eq!(stream.read(buf), Ok(0));
[INFO] [stdout]     |                           ^^^^ method not found in `MemStream`
[INFO] [stdout]     |
[INFO] [stdout]     = help: items from traits can only be used if the trait is in scope
[INFO] [stdout]     = note: the following trait is implemented but not in scope; perhaps add a `use` for it:
[INFO] [stdout]             `use std::io::Read;`
[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
[INFO] [stdout] ...
[INFO] [stdout] 86  |         assert_eq!(stream.read(buf), Ok(1));
[INFO] [stdout]     |                           ^^^^ method not found in `MemStream`
[INFO] [stdout]     |
[INFO] [stdout]     = help: items from traits can only be used if the trait is in scope
[INFO] [stdout]     = note: the following trait is implemented but not in scope; perhaps add a `use` for it:
[INFO] [stdout]             `use std::io::Read;`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature 'array_methods'
[INFO] [stdout]   --> src/lib.rs:88:24
[INFO] [stdout]    |
[INFO] [stdout] 88 |         assert_eq!(buf.as_slice(), b);
[INFO] [stdout]    |                        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #76118 <https://github.com/rust-lang/rust/issues/76118> for more information
[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 struct `RangeTo`
[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
[INFO] [stdout] ...
[INFO] [stdout] 90  |         assert_eq!(stream.read(buf), Ok(4));
[INFO] [stdout]     |                           ^^^^ method not found in `MemStream`
[INFO] [stdout]     |
[INFO] [stdout]     = help: items from traits can only be used if the trait is in scope
[INFO] [stdout]     = note: the following trait is implemented but not in scope; perhaps add a `use` for it:
[INFO] [stdout]             `use std::io::Read;`
[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
[INFO] [stdout] ...
[INFO] [stdout] 93  |         assert_eq!(stream.read(buf), Ok(3));
[INFO] [stdout]     |                           ^^^^ method not found in `MemStream`
[INFO] [stdout]     |
[INFO] [stdout]     = help: items from traits can only be used if the trait is in scope
[INFO] [stdout]     = note: the following trait is implemented but not in scope; perhaps add a `use` for it:
[INFO] [stdout]             `use std::io::Read;`
[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
[INFO] [stdout] ...
[INFO] [stdout] 96  |         assert!(stream.read(buf).is_err());
[INFO] [stdout]     |                        ^^^^ method not found in `MemStream`
[INFO] [stdout]     |
[INFO] [stdout]     = help: items from traits can only be used if the trait is in scope
[INFO] [stdout]     = note: the following trait is implemented but not in scope; perhaps add a `use` for it:
[INFO] [stdout]             `use std::io::Read;`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 10 previous errors; 1 warning emitted
[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` due to 11 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "650f45f563c35053f7715a343b70b9215ca9ae084e4642ff1abd9824fa80fae0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "650f45f563c35053f7715a343b70b9215ca9ae084e4642ff1abd9824fa80fae0", kill_on_drop: false }`
[INFO] [stdout] 650f45f563c35053f7715a343b70b9215ca9ae084e4642ff1abd9824fa80fae0
