[INFO] updating cached repository benjcollins/Iris
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/benjcollins/Iris
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/benjcollins/Iris" "work/ex/beta-1.38-1/sources/1.37.0/gh/benjcollins/Iris"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/benjcollins/Iris'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/benjcollins/Iris" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/benjcollins/Iris"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/benjcollins/Iris'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 345aa9c4047a40cf13ce09c9306c86410f3e5427
[INFO] sha for GitHub repo benjcollins/Iris: 345aa9c4047a40cf13ce09c9306c86410f3e5427
[INFO] validating manifest of benjcollins/Iris 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 benjcollins/Iris 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 benjcollins/Iris
[INFO] finished frobbing benjcollins/Iris
[INFO] frobbed toml for benjcollins/Iris written to work/ex/beta-1.38-1/sources/1.37.0/gh/benjcollins/Iris/Cargo.toml
[INFO] started frobbing benjcollins/Iris
[INFO] finished frobbing benjcollins/Iris
[INFO] frobbed toml for benjcollins/Iris written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/benjcollins/Iris/Cargo.toml
[INFO] crate benjcollins/Iris 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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing benjcollins/Iris against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/benjcollins/Iris:/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 2994731f6effaf9aa0cabdd0c45b7e6555e0e7001f165db8f770ec7338b7cf77
[INFO] running `"docker" "start" "-a" "2994731f6effaf9aa0cabdd0c45b7e6555e0e7001f165db8f770ec7338b7cf77"`
[INFO] [stderr]    Compiling lang v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::rc::Rc`
[INFO] [stderr]  --> src/parser.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::rc::Rc;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parser.rs:28:14
[INFO] [stderr]    |
[INFO] [stderr] 28 |     opr: &'a Fn(Expr, Expr) -> Node,
[INFO] [stderr]    |              ^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Expr, Expr) -> Node`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parser.rs:34:14
[INFO] [stderr]    |
[INFO] [stderr] 34 |     opr: &'a Fn(Expr) -> Node,
[INFO] [stderr]    |              ^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Expr) -> Node`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `col`
[INFO] [stderr]    --> src/parser.rs:112:17
[INFO] [stderr]     |
[INFO] [stderr] 112 |         let mut col = self.col;
[INFO] [stderr]     |                 ^^^ help: consider prefixing with an underscore: `_col`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/parser.rs:112:13
[INFO] [stderr]     |
[INFO] [stderr] 112 |         let mut col = self.col;
[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]     Finished dev [unoptimized + debuginfo] target(s) in 0.73s
[INFO] running `"docker" "inspect" "2994731f6effaf9aa0cabdd0c45b7e6555e0e7001f165db8f770ec7338b7cf77"`
[INFO] running `"docker" "rm" "-f" "2994731f6effaf9aa0cabdd0c45b7e6555e0e7001f165db8f770ec7338b7cf77"`
[INFO] [stdout] 2994731f6effaf9aa0cabdd0c45b7e6555e0e7001f165db8f770ec7338b7cf77
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/benjcollins/Iris:/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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 89fd53f2bca3af0ffce4e43bc402c1cd77ed10a887a61b4eda15d1e28fa904e2
[INFO] running `"docker" "start" "-a" "89fd53f2bca3af0ffce4e43bc402c1cd77ed10a887a61b4eda15d1e28fa904e2"`
[INFO] [stderr]    Compiling lang v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::rc::Rc`
[INFO] [stderr]  --> src/parser.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::rc::Rc;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parser.rs:28:14
[INFO] [stderr]    |
[INFO] [stderr] 28 |     opr: &'a Fn(Expr, Expr) -> Node,
[INFO] [stderr]    |              ^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Expr, Expr) -> Node`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parser.rs:34:14
[INFO] [stderr]    |
[INFO] [stderr] 34 |     opr: &'a Fn(Expr) -> Node,
[INFO] [stderr]    |              ^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Expr) -> Node`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `col`
[INFO] [stderr]    --> src/parser.rs:112:17
[INFO] [stderr]     |
[INFO] [stderr] 112 |         let mut col = self.col;
[INFO] [stderr]     |                 ^^^ help: consider prefixing with an underscore: `_col`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/parser.rs:112:13
[INFO] [stderr]     |
[INFO] [stderr] 112 |         let mut col = self.col;
[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]     Finished dev [unoptimized + debuginfo] target(s) in 0.52s
[INFO] running `"docker" "inspect" "89fd53f2bca3af0ffce4e43bc402c1cd77ed10a887a61b4eda15d1e28fa904e2"`
[INFO] running `"docker" "rm" "-f" "89fd53f2bca3af0ffce4e43bc402c1cd77ed10a887a61b4eda15d1e28fa904e2"`
[INFO] [stdout] 89fd53f2bca3af0ffce4e43bc402c1cd77ed10a887a61b4eda15d1e28fa904e2
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/benjcollins/Iris:/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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] fc64f72e8d908972d57a92a9c2b0f99fc44376383ce79f267a5fd653962b4467
[INFO] running `"docker" "start" "-a" "fc64f72e8d908972d57a92a9c2b0f99fc44376383ce79f267a5fd653962b4467"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/lang-d30bbc7a7c4ea33b
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "fc64f72e8d908972d57a92a9c2b0f99fc44376383ce79f267a5fd653962b4467"`
[INFO] running `"docker" "rm" "-f" "fc64f72e8d908972d57a92a9c2b0f99fc44376383ce79f267a5fd653962b4467"`
[INFO] [stdout] fc64f72e8d908972d57a92a9c2b0f99fc44376383ce79f267a5fd653962b4467