[INFO] updating cached repository cis198-2016s/hw04
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/cis198-2016s/hw04
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/cis198-2016s/hw04" "work/ex/beta-1.38-1/sources/1.37.0/gh/cis198-2016s/hw04"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/cis198-2016s/hw04'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/cis198-2016s/hw04" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/cis198-2016s/hw04"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/cis198-2016s/hw04'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 8d4ff5d6004215e2b89b4a807bb4306766ec36e7
[INFO] sha for GitHub repo cis198-2016s/hw04: 8d4ff5d6004215e2b89b4a807bb4306766ec36e7
[INFO] validating manifest of cis198-2016s/hw04 on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of cis198-2016s/hw04 on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing cis198-2016s/hw04
[INFO] finished frobbing cis198-2016s/hw04
[INFO] frobbed toml for cis198-2016s/hw04 written to work/ex/beta-1.38-1/sources/1.37.0/gh/cis198-2016s/hw04/Cargo.toml
[INFO] started frobbing cis198-2016s/hw04
[INFO] finished frobbing cis198-2016s/hw04
[INFO] frobbed toml for cis198-2016s/hw04 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/cis198-2016s/hw04/Cargo.toml
[INFO] crate cis198-2016s/hw04 already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/cis198-2016s/hw04/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing cis198-2016s/hw04 against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/cis198-2016s/hw04:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 8106d162785db96fee4c88f631aa556e6cc8272a028367cb3c2cd6a9985365d4
[INFO] running `"docker" "start" "-a" "8106d162785db96fee4c88f631aa556e6cc8272a028367cb3c2cd6a9985365d4"`
[INFO] [stderr]    Compiling hw04 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0432]: unresolved import `rpn::Stack`
[INFO] [stderr]  --> src/parser.rs:3:17
[INFO] [stderr]   |
[INFO] [stderr] 3 | use rpn::{self, Stack};
[INFO] [stderr]   |                 ^^^^^ no `Stack` in `rpn`
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `Result` in module `rpn`
[INFO] [stderr]  --> src/parser.rs:6:39
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn read_eval_print_loop() -> rpn::Result<()> {
[INFO] [stderr]   |                                       ^^^^^^ not found in `rpn`
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::fmt::Result;
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io::Result;
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::prelude::v1::Result;
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::result::Result;
[INFO] [stderr]   |
[INFO] [stderr] and 1 other candidates
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `Result` in module `rpn`
[INFO] [stderr]   --> src/parser.rs:21:59
[INFO] [stderr]    |
[INFO] [stderr] 21 | fn evaluate_line(stack: &mut Stack, buf: &String) -> rpn::Result<()> {
[INFO] [stderr]    |                                                           ^^^^^^ not found in `rpn`
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]    |
[INFO] [stderr] 1  | use std::fmt::Result;
[INFO] [stderr]    |
[INFO] [stderr] 1  | use std::io::Result;
[INFO] [stderr]    |
[INFO] [stderr] 1  | use std::prelude::v1::Result;
[INFO] [stderr]    |
[INFO] [stderr] 1  | use std::result::Result;
[INFO] [stderr]    |
[INFO] [stderr] and 1 other candidates
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `Stack` in this scope
[INFO] [stderr]   --> src/rpn.rs:47:6
[INFO] [stderr]    |
[INFO] [stderr] 47 | impl Stack {
[INFO] [stderr]    |      ^^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `Stack` in this scope
[INFO] [stderr]   --> src/rpn.rs:49:21
[INFO] [stderr]    |
[INFO] [stderr] 49 |     pub fn new() -> Stack {
[INFO] [stderr]    |                     ^^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::result`
[INFO] [stderr]  --> src/rpn.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::result;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0107]: wrong number of type arguments: expected 2, found 1
[INFO] [stderr]   --> src/rpn.rs:54:41
[INFO] [stderr]    |
[INFO] [stderr] 54 |     pub fn push(&mut self, val: Elt) -> Result<()> {
[INFO] [stderr]    |                                         ^^^^^^^^^^ expected 2 type arguments
[INFO] [stderr] 
[INFO] [stderr] error[E0107]: wrong number of type arguments: expected 2, found 1
[INFO] [stderr]   --> src/rpn.rs:59:30
[INFO] [stderr]    |
[INFO] [stderr] 59 |     pub fn pop(&mut self) -> Result<Elt> {
[INFO] [stderr]    |                              ^^^^^^^^^^^ expected 2 type arguments
[INFO] [stderr] 
[INFO] [stderr] error[E0107]: wrong number of type arguments: expected 2, found 1
[INFO] [stderr]   --> src/rpn.rs:64:39
[INFO] [stderr]    |
[INFO] [stderr] 64 |     pub fn eval(&mut self, op: Op) -> Result<()> {
[INFO] [stderr]    |                                       ^^^^^^^^^^ expected 2 type arguments
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 8 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0107, E0412, E0432.
[INFO] [stderr] For more information about an error, try `rustc --explain E0107`.
[INFO] [stderr] error: Could not compile `hw04`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "8106d162785db96fee4c88f631aa556e6cc8272a028367cb3c2cd6a9985365d4"`
[INFO] running `"docker" "rm" "-f" "8106d162785db96fee4c88f631aa556e6cc8272a028367cb3c2cd6a9985365d4"`
[INFO] [stdout] 8106d162785db96fee4c88f631aa556e6cc8272a028367cb3c2cd6a9985365d4