[INFO] updating cached repository https://github.com/FrankYang4/learning-rust
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 17008ef4e40720b3cc35879685621cb06d8b553b
[INFO] testing FrankYang4/learning-rust against 1.38.0 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2FFrankYang4%2Flearning-rust" "work/builds/worker-10/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/FrankYang4/learning-rust on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/FrankYang4/learning-rust
[INFO] finished tweaking git repo https://github.com/FrankYang4/learning-rust
[INFO] tweaked toml for git repo https://github.com/FrankYang4/learning-rust written to work/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/FrankYang4/learning-rust already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-10/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] f86e9b2369614b447004604f51d7998f1835c490b450ffa1983b2292e09b5623
[INFO] running `"docker" "start" "-a" "f86e9b2369614b447004604f51d7998f1835c490b450ffa1983b2292e09b5623"`
[INFO] [stderr]    Compiling learning_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.32s
[INFO] running `"docker" "inspect" "f86e9b2369614b447004604f51d7998f1835c490b450ffa1983b2292e09b5623"`
[INFO] running `"docker" "rm" "-f" "f86e9b2369614b447004604f51d7998f1835c490b450ffa1983b2292e09b5623"`
[INFO] [stdout] f86e9b2369614b447004604f51d7998f1835c490b450ffa1983b2292e09b5623
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-10/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] e63dfe1dc6055c9e9f6a35cb30fc05e92672a1ec24eb6d6a36ce3f286a540310
[INFO] running `"docker" "start" "-a" "e63dfe1dc6055c9e9f6a35cb30fc05e92672a1ec24eb6d6a36ce3f286a540310"`
[INFO] [stderr]    Compiling learning_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: unexpected token: `...`
[INFO] [stderr]  --> examples/for_loop.rs:3:15
[INFO] [stderr]   |
[INFO] [stderr] 3 |     for i in 0...10 {
[INFO] [stderr]   |               ^^^
[INFO] [stderr] help: use `..` for an exclusive range
[INFO] [stderr]   |
[INFO] [stderr] 3 |     for i in 0..10 {
[INFO] [stderr]   |               ^^
[INFO] [stderr] help: or `..=` for an inclusive range
[INFO] [stderr]   |
[INFO] [stderr] 3 |     for i in 0..=10 {
[INFO] [stderr]   |               ^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> examples/boxes.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(box_syntax, box_patterns)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: unexpected token: `...`
[INFO] [stderr]   --> examples/array.rs:10:21
[INFO] [stderr]    |
[INFO] [stderr] 10 |              &arr2[1...2]);
[INFO] [stderr]    |                     ^^^
[INFO] [stderr] help: use `..` for an exclusive range
[INFO] [stderr]    |
[INFO] [stderr] 10 |              &arr2[1..2]);
[INFO] [stderr]    |                     ^^
[INFO] [stderr] help: or `..=` for an inclusive range
[INFO] [stderr]    |
[INFO] [stderr] 10 |              &arr2[1..=2]);
[INFO] [stderr]    |                     ^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> examples/array.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(inclusive_range_syntax)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> examples/for_loop.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(inclusive_range_syntax)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]   --> examples/match_pattern.rs:26:14
[INFO] [stderr]    |
[INFO] [stderr] 26 |         d @ 1...5 => println!("weekday {}", d),
[INFO] [stderr]    |              ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `learning_rust`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `learning_rust`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] warning: floating-point types cannot be used in patterns
[INFO] [stderr]  --> examples/match_pattern.rs:9:10
[INFO] [stderr]   |
[INFO] [stderr] 9 |         (1.2, y) => println!("x is 1.2, y is {}", y),
[INFO] [stderr]   |          ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(illegal_floating_point_literal_pattern)]` on by default
[INFO] [stderr]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr]   = note: for more information, see issue #41620 <https://github.com/rust-lang/rust/issues/41620>
[INFO] [stderr] 
[INFO] [stderr] warning: floating-point types cannot be used in patterns
[INFO] [stderr]   --> examples/match_pattern.rs:10:13
[INFO] [stderr]    |
[INFO] [stderr] 10 |         (x, 4.3) => println!("x is {}, y is 4.3", x),
[INFO] [stderr]    |             ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr]    = note: for more information, see issue #41620 <https://github.com/rust-lang/rust/issues/41620>
[INFO] [stderr] 
[INFO] [stderr] warning: floating-point types cannot be used in patterns
[INFO] [stderr]  --> examples/match_pattern.rs:9:10
[INFO] [stderr]   |
[INFO] [stderr] 9 |         (1.2, y) => println!("x is 1.2, y is {}", y),
[INFO] [stderr]   |          ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr]   = note: for more information, see issue #41620 <https://github.com/rust-lang/rust/issues/41620>
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `learning_rust`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> examples/vec.rs:23:13
[INFO] [stderr]    |
[INFO] [stderr] 23 |         let mut v5 = &mut v4;
[INFO] [stderr]    |             ----^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "e63dfe1dc6055c9e9f6a35cb30fc05e92672a1ec24eb6d6a36ce3f286a540310"`
[INFO] running `"docker" "rm" "-f" "e63dfe1dc6055c9e9f6a35cb30fc05e92672a1ec24eb6d6a36ce3f286a540310"`
[INFO] [stdout] e63dfe1dc6055c9e9f6a35cb30fc05e92672a1ec24eb6d6a36ce3f286a540310