[INFO] updating cached repository NatTuck/meatball
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/NatTuck/meatball
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/NatTuck/meatball" "work/ex/beta-1.37-6/sources/1.36.0/gh/NatTuck/meatball"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/NatTuck/meatball'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/NatTuck/meatball" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/NatTuck/meatball"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/NatTuck/meatball'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 14c81418bb1aaeea96385cbe7bc05cd465dfce2f
[INFO] sha for GitHub repo NatTuck/meatball: 14c81418bb1aaeea96385cbe7bc05cd465dfce2f
[INFO] validating manifest of NatTuck/meatball on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of NatTuck/meatball on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing NatTuck/meatball
[INFO] finished frobbing NatTuck/meatball
[INFO] frobbed toml for NatTuck/meatball written to work/ex/beta-1.37-6/sources/1.36.0/gh/NatTuck/meatball/Cargo.toml
[INFO] started frobbing NatTuck/meatball
[INFO] finished frobbing NatTuck/meatball
[INFO] frobbed toml for NatTuck/meatball written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/NatTuck/meatball/Cargo.toml
[INFO] crate NatTuck/meatball already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing NatTuck/meatball against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/NatTuck/meatball:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 86fc73f30469ddba2b0a371b95324e79f0ffda42537e376f7789c0fe1750dd02
[INFO] running `"docker" "start" "-a" "86fc73f30469ddba2b0a371b95324e79f0ffda42537e376f7789c0fe1750dd02"`
[INFO] [stderr]    Compiling meatball v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `builtins::Builtin`
[INFO] [stderr]  --> src/program.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use builtins::Builtin;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `zero_expr`
[INFO] [stderr]   --> src/parse.rs:46:1
[INFO] [stderr]    |
[INFO] [stderr] 46 | pub fn zero_expr() -> Ast {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Cond`
[INFO] [stderr]   --> src/program.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 30 |     Cond(Vec<(Expr, Expr)>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Func`
[INFO] [stderr]   --> src/program.rs:31:5
[INFO] [stderr]    |
[INFO] [stderr] 31 |     Func(Box<Func>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `ast2var`
[INFO] [stderr]   --> src/program.rs:80:1
[INFO] [stderr]    |
[INFO] [stderr] 80 | fn ast2var(ast: &[Ast]) -> Result<(String, Expr)> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.20s
[INFO] running `"docker" "inspect" "86fc73f30469ddba2b0a371b95324e79f0ffda42537e376f7789c0fe1750dd02"`
[INFO] running `"docker" "rm" "-f" "86fc73f30469ddba2b0a371b95324e79f0ffda42537e376f7789c0fe1750dd02"`
[INFO] [stdout] 86fc73f30469ddba2b0a371b95324e79f0ffda42537e376f7789c0fe1750dd02
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/NatTuck/meatball:/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 13b6041da752945236d0e4c0d85d93a7f7a53f84cc2aca0f1001c9746fd9478c
[INFO] running `"docker" "start" "-a" "13b6041da752945236d0e4c0d85d93a7f7a53f84cc2aca0f1001c9746fd9478c"`
[INFO] [stderr]    Compiling meatball v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `builtins::Builtin`
[INFO] [stderr]  --> src/program.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use builtins::Builtin;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `zero_expr`
[INFO] [stderr]   --> src/parse.rs:46:1
[INFO] [stderr]    |
[INFO] [stderr] 46 | pub fn zero_expr() -> Ast {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Cond`
[INFO] [stderr]   --> src/program.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 30 |     Cond(Vec<(Expr, Expr)>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Func`
[INFO] [stderr]   --> src/program.rs:31:5
[INFO] [stderr]    |
[INFO] [stderr] 31 |     Func(Box<Func>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `ast2var`
[INFO] [stderr]   --> src/program.rs:80:1
[INFO] [stderr]    |
[INFO] [stderr] 80 | fn ast2var(ast: &[Ast]) -> Result<(String, Expr)> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.32s
[INFO] running `"docker" "inspect" "13b6041da752945236d0e4c0d85d93a7f7a53f84cc2aca0f1001c9746fd9478c"`
[INFO] running `"docker" "rm" "-f" "13b6041da752945236d0e4c0d85d93a7f7a53f84cc2aca0f1001c9746fd9478c"`
[INFO] [stdout] 13b6041da752945236d0e4c0d85d93a7f7a53f84cc2aca0f1001c9746fd9478c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/NatTuck/meatball:/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] ab75b4f0b1db0a1620b1952fa0f33101dba10e8b369a71a5fd3ec6ef1a8c5bb6
[INFO] running `"docker" "start" "-a" "ab75b4f0b1db0a1620b1952fa0f33101dba10e8b369a71a5fd3ec6ef1a8c5bb6"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/meatball-94bda4b275b8d2b7
[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" "ab75b4f0b1db0a1620b1952fa0f33101dba10e8b369a71a5fd3ec6ef1a8c5bb6"`
[INFO] running `"docker" "rm" "-f" "ab75b4f0b1db0a1620b1952fa0f33101dba10e8b369a71a5fd3ec6ef1a8c5bb6"`
[INFO] [stdout] ab75b4f0b1db0a1620b1952fa0f33101dba10e8b369a71a5fd3ec6ef1a8c5bb6