[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/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/NatTuck/meatball"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/NatTuck/meatball'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/NatTuck/meatball" "work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/NatTuck/meatball"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/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 master#435236b8877cdb98c82eaebfb7887782277265c5
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of NatTuck/meatball on toolchain try#b5c7f157c20453dde8d47371abe73b32351b4e7f
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "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/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/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/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/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" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] checking NatTuck/meatball against try#b5c7f157c20453dde8d47371abe73b32351b4e7f for pr-62849
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62849/worker-7/try#b5c7f157c20453dde8d47371abe73b32351b4e7f:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/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=forbid" "-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" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 6bef6aa0cca8a459dfa7c0f537e45213723125a5c1f507594037928b2dcb2098
[INFO] running `"docker" "start" "-a" "6bef6aa0cca8a459dfa7c0f537e45213723125a5c1f507594037928b2dcb2098"`
[INFO] [stderr]     Checking regex v1.0.2
[INFO] [stderr]     Checking 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: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]   --> src/parse.rs:89:5
[INFO] [stderr]    |
[INFO] [stderr] 89 | /     lazy_static! {
[INFO] [stderr] 90 | |         static ref WSP: Regex = Regex::new(r"^\s+").unwrap();
[INFO] [stderr] 91 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]    --> src/parse.rs:115:5
[INFO] [stderr]     |
[INFO] [stderr] 115 | /     lazy_static! {
[INFO] [stderr] 116 | |         static ref PAR: Regex = Regex::new(r"^[\(\[\)\]]").unwrap();
[INFO] [stderr] 117 | |         static ref F64: Regex = Regex::new(r"^\d+\.\d*").unwrap();
[INFO] [stderr] 118 | |         static ref I64: Regex = Regex::new(r"^\d+").unwrap();
[INFO] [stderr] 119 | |         static ref SYM: Regex =
[INFO] [stderr] 120 | |             Regex::new(r#"^[\p{L}_+\-!?][\p{L}\p{N}_+\-!?]*"#).unwrap();
[INFO] [stderr] 121 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]    --> src/parse.rs:115:5
[INFO] [stderr]     |
[INFO] [stderr] 115 | /     lazy_static! {
[INFO] [stderr] 116 | |         static ref PAR: Regex = Regex::new(r"^[\(\[\)\]]").unwrap();
[INFO] [stderr] 117 | |         static ref F64: Regex = Regex::new(r"^\d+\.\d*").unwrap();
[INFO] [stderr] 118 | |         static ref I64: Regex = Regex::new(r"^\d+").unwrap();
[INFO] [stderr] 119 | |         static ref SYM: Regex =
[INFO] [stderr] 120 | |             Regex::new(r#"^[\p{L}_+\-!?][\p{L}\p{N}_+\-!?]*"#).unwrap();
[INFO] [stderr] 121 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]    --> src/parse.rs:115:5
[INFO] [stderr]     |
[INFO] [stderr] 115 | /     lazy_static! {
[INFO] [stderr] 116 | |         static ref PAR: Regex = Regex::new(r"^[\(\[\)\]]").unwrap();
[INFO] [stderr] 117 | |         static ref F64: Regex = Regex::new(r"^\d+\.\d*").unwrap();
[INFO] [stderr] 118 | |         static ref I64: Regex = Regex::new(r"^\d+").unwrap();
[INFO] [stderr] 119 | |         static ref SYM: Regex =
[INFO] [stderr] 120 | |             Regex::new(r#"^[\p{L}_+\-!?][\p{L}\p{N}_+\-!?]*"#).unwrap();
[INFO] [stderr] 121 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]    --> src/parse.rs:115:5
[INFO] [stderr]     |
[INFO] [stderr] 115 | /     lazy_static! {
[INFO] [stderr] 116 | |         static ref PAR: Regex = Regex::new(r"^[\(\[\)\]]").unwrap();
[INFO] [stderr] 117 | |         static ref F64: Regex = Regex::new(r"^\d+\.\d*").unwrap();
[INFO] [stderr] 118 | |         static ref I64: Regex = Regex::new(r"^\d+").unwrap();
[INFO] [stderr] 119 | |         static ref SYM: Regex =
[INFO] [stderr] 120 | |             Regex::new(r#"^[\p{L}_+\-!?][\p{L}\p{N}_+\-!?]*"#).unwrap();
[INFO] [stderr] 121 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[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: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]   --> src/parse.rs:89:5
[INFO] [stderr]    |
[INFO] [stderr] 89 | /     lazy_static! {
[INFO] [stderr] 90 | |         static ref WSP: Regex = Regex::new(r"^\s+").unwrap();
[INFO] [stderr] 91 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]    --> src/parse.rs:115:5
[INFO] [stderr]     |
[INFO] [stderr] 115 | /     lazy_static! {
[INFO] [stderr] 116 | |         static ref PAR: Regex = Regex::new(r"^[\(\[\)\]]").unwrap();
[INFO] [stderr] 117 | |         static ref F64: Regex = Regex::new(r"^\d+\.\d*").unwrap();
[INFO] [stderr] 118 | |         static ref I64: Regex = Regex::new(r"^\d+").unwrap();
[INFO] [stderr] 119 | |         static ref SYM: Regex =
[INFO] [stderr] 120 | |             Regex::new(r#"^[\p{L}_+\-!?][\p{L}\p{N}_+\-!?]*"#).unwrap();
[INFO] [stderr] 121 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]    --> src/parse.rs:115:5
[INFO] [stderr]     |
[INFO] [stderr] 115 | /     lazy_static! {
[INFO] [stderr] 116 | |         static ref PAR: Regex = Regex::new(r"^[\(\[\)\]]").unwrap();
[INFO] [stderr] 117 | |         static ref F64: Regex = Regex::new(r"^\d+\.\d*").unwrap();
[INFO] [stderr] 118 | |         static ref I64: Regex = Regex::new(r"^\d+").unwrap();
[INFO] [stderr] 119 | |         static ref SYM: Regex =
[INFO] [stderr] 120 | |             Regex::new(r#"^[\p{L}_+\-!?][\p{L}\p{N}_+\-!?]*"#).unwrap();
[INFO] [stderr] 121 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]    --> src/parse.rs:115:5
[INFO] [stderr]     |
[INFO] [stderr] 115 | /     lazy_static! {
[INFO] [stderr] 116 | |         static ref PAR: Regex = Regex::new(r"^[\(\[\)\]]").unwrap();
[INFO] [stderr] 117 | |         static ref F64: Regex = Regex::new(r"^\d+\.\d*").unwrap();
[INFO] [stderr] 118 | |         static ref I64: Regex = Regex::new(r"^\d+").unwrap();
[INFO] [stderr] 119 | |         static ref SYM: Regex =
[INFO] [stderr] 120 | |             Regex::new(r#"^[\p{L}_+\-!?][\p{L}\p{N}_+\-!?]*"#).unwrap();
[INFO] [stderr] 121 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]    --> src/parse.rs:115:5
[INFO] [stderr]     |
[INFO] [stderr] 115 | /     lazy_static! {
[INFO] [stderr] 116 | |         static ref PAR: Regex = Regex::new(r"^[\(\[\)\]]").unwrap();
[INFO] [stderr] 117 | |         static ref F64: Regex = Regex::new(r"^\d+\.\d*").unwrap();
[INFO] [stderr] 118 | |         static ref I64: Regex = Regex::new(r"^\d+").unwrap();
[INFO] [stderr] 119 | |         static ref SYM: Regex =
[INFO] [stderr] 120 | |             Regex::new(r#"^[\p{L}_+\-!?][\p{L}\p{N}_+\-!?]*"#).unwrap();
[INFO] [stderr] 121 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[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] 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 4.68s
[INFO] running `"docker" "inspect" "6bef6aa0cca8a459dfa7c0f537e45213723125a5c1f507594037928b2dcb2098"`
[INFO] running `"docker" "rm" "-f" "6bef6aa0cca8a459dfa7c0f537e45213723125a5c1f507594037928b2dcb2098"`
[INFO] [stdout] 6bef6aa0cca8a459dfa7c0f537e45213723125a5c1f507594037928b2dcb2098