[INFO] cloning repository https://github.com/karenhong/prusti_vec
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/karenhong/prusti_vec" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkarenhong%2Fprusti_vec", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkarenhong%2Fprusti_vec'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e6ae59a4ea39261f6dcc587a5a37a99ac624d720
[INFO] testing karenhong/prusti_vec against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkarenhong%2Fprusti_vec" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/karenhong/prusti_vec on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/karenhong/prusti_vec
[INFO] finished tweaking git repo https://github.com/karenhong/prusti_vec
[INFO] tweaked toml for git repo https://github.com/karenhong/prusti_vec written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/karenhong/prusti_vec already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 471241021fbaeca3db6eef5720b2ea71ac4e45775721fdd9eca6ccfe6e9b5530
[INFO] running `Command { std: "docker" "start" "-a" "471241021fbaeca3db6eef5720b2ea71ac4e45775721fdd9eca6ccfe6e9b5530", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "471241021fbaeca3db6eef5720b2ea71ac4e45775721fdd9eca6ccfe6e9b5530", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "471241021fbaeca3db6eef5720b2ea71ac4e45775721fdd9eca6ccfe6e9b5530", kill_on_drop: false }`
[INFO] [stdout] 471241021fbaeca3db6eef5720b2ea71ac4e45775721fdd9eca6ccfe6e9b5530
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dd733469f96802595cb726ffb8a72d62b7ef7ac7a82a3456e1b821e650034175
[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" "dd733469f96802595cb726ffb8a72d62b7ef7ac7a82a3456e1b821e650034175", kill_on_drop: false }`
[INFO] [stderr]    Compiling prusti-lib-support v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0463]: can't find crate for `prusti_contracts`
[INFO] [stdout]  --> src/prusti_vec.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | extern crate prusti_contracts;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `ensures` in this scope
[INFO] [stdout]  --> src/prusti_vec.rs:4:7
[INFO] [stdout]   |
[INFO] [stdout] 4 |     #[ensures="result.len() == 0"]
[INFO] [stdout]   |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `requires` in this scope
[INFO] [stdout]  --> src/prusti_vec.rs:7:7
[INFO] [stdout]   |
[INFO] [stdout] 7 |     #[requires="capacity >= 0"]
[INFO] [stdout]   |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `ensures` in this scope
[INFO] [stdout]  --> src/prusti_vec.rs:8:7
[INFO] [stdout]   |
[INFO] [stdout] 8 |     #[ensures="result.len() == 0"]
[INFO] [stdout]   |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `ensures` in this scope
[INFO] [stdout]  --> src/prusti_vec.rs:9:7
[INFO] [stdout]   |
[INFO] [stdout] 9 |     #[ensures="result.capacity() == capacity"]
[INFO] [stdout]   |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `pure` in this scope
[INFO] [stdout]   --> src/prusti_vec.rs:12:7
[INFO] [stdout]    |
[INFO] [stdout] 12 |     #[pure]
[INFO] [stdout]    |       ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `ensures` in this scope
[INFO] [stdout]   --> src/prusti_vec.rs:13:7
[INFO] [stdout]    |
[INFO] [stdout] 13 |     #[ensures="result >= self.len()"]
[INFO] [stdout]    |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `ensures` in this scope
[INFO] [stdout]   --> src/prusti_vec.rs:16:7
[INFO] [stdout]    |
[INFO] [stdout] 16 |     #[ensures="self.capacity() >= self.len()"]
[INFO] [stdout]    |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `ensures` in this scope
[INFO] [stdout]   --> src/prusti_vec.rs:17:7
[INFO] [stdout]    |
[INFO] [stdout] 17 |     #[ensures="self.capacity() >= old(self.len())"]
[INFO] [stdout]    |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `ensures` in this scope
[INFO] [stdout]   --> src/prusti_vec.rs:18:7
[INFO] [stdout]    |
[INFO] [stdout] 18 |     #[ensures="forall i: usize :: (i >= 0 && i < self.len()) ==> 
[INFO] [stdout]    |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `ensures` in this scope
[INFO] [stdout]   --> src/prusti_vec.rs:22:7
[INFO] [stdout]    |
[INFO] [stdout] 22 |     #[ensures="self.len() == old(self.len()) + 1"]
[INFO] [stdout]    |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `ensures` in this scope
[INFO] [stdout]   --> src/prusti_vec.rs:23:7
[INFO] [stdout]    |
[INFO] [stdout] 23 |     #[ensures="forall i: usize :: (i >= 0 && i < old(self.len())) ==> 
[INFO] [stdout]    |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `ensures` in this scope
[INFO] [stdout]   --> src/prusti_vec.rs:25:7
[INFO] [stdout]    |
[INFO] [stdout] 25 |     #[ensures="self.index(self.len()-1) == value"]
[INFO] [stdout]    |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `ensures` in this scope
[INFO] [stdout]   --> src/prusti_vec.rs:28:7
[INFO] [stdout]    |
[INFO] [stdout] 28 |     #[ensures="self.len() == old(self.len()) - 1"]
[INFO] [stdout]    |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `ensures` in this scope
[INFO] [stdout]   --> src/prusti_vec.rs:29:7
[INFO] [stdout]    |
[INFO] [stdout] 29 |     #[ensures="forall i: usize :: (i >= 0 && i < self.len()) ==> 
[INFO] [stdout]    |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `pure` in this scope
[INFO] [stdout]   --> src/prusti_vec.rs:33:7
[INFO] [stdout]    |
[INFO] [stdout] 33 |     #[pure]
[INFO] [stdout]    |       ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `ensures` in this scope
[INFO] [stdout]   --> src/prusti_vec.rs:34:7
[INFO] [stdout]    |
[INFO] [stdout] 34 |     #[ensures="result >= 0"]
[INFO] [stdout]    |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `ensures` in this scope
[INFO] [stdout]   --> src/prusti_vec.rs:37:7
[INFO] [stdout]    |
[INFO] [stdout] 37 |     #[ensures="self.len() == old(self.len()) + other.len()"]
[INFO] [stdout]    |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `ensures` in this scope
[INFO] [stdout]   --> src/prusti_vec.rs:41:7
[INFO] [stdout]    |
[INFO] [stdout] 41 |     #[ensures="self.len() == 0"]
[INFO] [stdout]    |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `ensures` in this scope
[INFO] [stdout]   --> src/prusti_vec.rs:44:7
[INFO] [stdout]    |
[INFO] [stdout] 44 |     #[ensures="self.len() == result.len()"]
[INFO] [stdout]    |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `ensures` in this scope
[INFO] [stdout]   --> src/prusti_vec.rs:45:7
[INFO] [stdout]    |
[INFO] [stdout] 45 |     #[ensures="forall i: usize :: (i >= 0 && i < result.len()) ==> 
[INFO] [stdout]    |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `requires` in this scope
[INFO] [stdout]   --> src/prusti_vec.rs:74:7
[INFO] [stdout]    |
[INFO] [stdout] 74 |     #[requires="index >= 0"]
[INFO] [stdout]    |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `requires` in this scope
[INFO] [stdout]   --> src/prusti_vec.rs:79:7
[INFO] [stdout]    |
[INFO] [stdout] 79 |     #[requires="index >= 0"]
[INFO] [stdout]    |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `pure` in this scope
[INFO] [stdout]   --> src/prusti_vec.rs:84:7
[INFO] [stdout]    |
[INFO] [stdout] 84 |     #[pure]
[INFO] [stdout]    |       ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `ensures` in this scope
[INFO] [stdout]   --> src/prusti_vec.rs:85:7
[INFO] [stdout]    |
[INFO] [stdout] 85 |     #[ensures="result >= 0"]
[INFO] [stdout]    |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `ensures` in this scope
[INFO] [stdout]   --> src/prusti_vec.rs:88:7
[INFO] [stdout]    |
[INFO] [stdout] 88 |     #[ensures="self.len() == 0 ==> true"]
[INFO] [stdout]    |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `ensures` in this scope
[INFO] [stdout]   --> src/prusti_vec.rs:89:7
[INFO] [stdout]    |
[INFO] [stdout] 89 |     #[ensures="self.len() != 0 ==> false"]
[INFO] [stdout]    |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `ensures` in this scope
[INFO] [stdout]   --> src/prusti_vec.rs:93:7
[INFO] [stdout]    |
[INFO] [stdout] 93 |     #[ensures="result == self.get(0)"]
[INFO] [stdout]    |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `ensures` in this scope
[INFO] [stdout]   --> src/prusti_vec.rs:96:7
[INFO] [stdout]    |
[INFO] [stdout] 96 |     #[ensures="result == self.get(self.len() - 1)"]
[INFO] [stdout]    |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `requires` in this scope
[INFO] [stdout]   --> src/prusti_vec.rs:99:7
[INFO] [stdout]    |
[INFO] [stdout] 99 |     #[requires="a >= 0 && a < self.len() && b >= 0 && b < self.len()"] // Panics if a or b are out of bounds.
[INFO] [stdout]    |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `ensures` in this scope
[INFO] [stdout]    --> src/prusti_vec.rs:100:7
[INFO] [stdout]     |
[INFO] [stdout] 100 |     #[ensures="self.len() == old(self.len())"]
[INFO] [stdout]     |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `ensures` in this scope
[INFO] [stdout]    --> src/prusti_vec.rs:101:7
[INFO] [stdout]     |
[INFO] [stdout] 101 |     #[ensures="self.get(a) == old(self.get(b)) && self.get(b) == old(self.get(a))"]
[INFO] [stdout]     |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `ensures` in this scope
[INFO] [stdout]    --> src/prusti_vec.rs:102:7
[INFO] [stdout]     |
[INFO] [stdout] 102 |     #[ensures="forall i: usize :: (i >= 0 && i < self.len() && i != a && i != b) ==> 
[INFO] [stdout]     |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `ensures` in this scope
[INFO] [stdout]    --> src/prusti_vec.rs:107:7
[INFO] [stdout]     |
[INFO] [stdout] 107 |     #[ensures="self.len() == old(self.len())"]
[INFO] [stdout]     |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `ensures` in this scope
[INFO] [stdout]    --> src/prusti_vec.rs:108:7
[INFO] [stdout]     |
[INFO] [stdout] 108 |     #[ensures="forall i: usize, j: usize ::
[INFO] [stdout]     |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `ensures` in this scope
[INFO] [stdout]    --> src/prusti_vec.rs:113:7
[INFO] [stdout]     |
[INFO] [stdout] 113 |     #[ensures="self.len() == old(self.len())"]
[INFO] [stdout]     |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `ensures` in this scope
[INFO] [stdout]    --> src/prusti_vec.rs:114:7
[INFO] [stdout]     |
[INFO] [stdout] 114 |     #[ensures="forall i : usize :: (i >= 0 && i < self.len()) ==> 
[INFO] [stdout]     |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 37 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `prusti-lib-support` due to 38 previous errors
[INFO] running `Command { std: "docker" "inspect" "dd733469f96802595cb726ffb8a72d62b7ef7ac7a82a3456e1b821e650034175", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dd733469f96802595cb726ffb8a72d62b7ef7ac7a82a3456e1b821e650034175", kill_on_drop: false }`
[INFO] [stdout] dd733469f96802595cb726ffb8a72d62b7ef7ac7a82a3456e1b821e650034175