[INFO] fetching crate memstream 0.0.1...
[INFO] checking memstream-0.0.1 against beta-2020-07-24 for pr-75494-beta
[INFO] extracting crate memstream 0.0.1 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate memstream 0.0.1 on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", 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-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5547b9e8aca1b4849d268f40ed9b23f5fb9f1d0f92b3e073d092db939c340b47
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "5547b9e8aca1b4849d268f40ed9b23f5fb9f1d0f92b3e073d092db939c340b47", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5547b9e8aca1b4849d268f40ed9b23f5fb9f1d0f92b3e073d092db939c340b47", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5547b9e8aca1b4849d268f40ed9b23f5fb9f1d0f92b3e073d092db939c340b47", kill_on_drop: false }`
[INFO] [stdout] 5547b9e8aca1b4849d268f40ed9b23f5fb9f1d0f92b3e073d092db939c340b47
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2d81090064f158ff072543b8145fa2a9e2db2c0a7cc5f35e21245da441da3dea
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "2d81090064f158ff072543b8145fa2a9e2db2c0a7cc5f35e21245da441da3dea", 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] 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: 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[E0599]: no method named `as_slice` found for array `[{integer}; 1]` in the current scope
[INFO] [stdout]   --> src/lib.rs:88:24
[INFO] [stdout]    |
[INFO] [stdout] 88 |         assert_eq!(buf.as_slice(), b);
[INFO] [stdout]    |                        ^^^^^^^^ method not found in `[{integer}; 1]`
[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::array::FixedSizeArray;`
[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 `std::ops::RangeTo`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected type `{integer}`
[INFO] [stdout]             found struct `std::ops::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`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "2d81090064f158ff072543b8145fa2a9e2db2c0a7cc5f35e21245da441da3dea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2d81090064f158ff072543b8145fa2a9e2db2c0a7cc5f35e21245da441da3dea", kill_on_drop: false }`
[INFO] [stdout] 2d81090064f158ff072543b8145fa2a9e2db2c0a7cc5f35e21245da441da3dea
