Oct 27 10:58:09.995 INFO checking Lapz/undisclosed against try#19f01b935b91481fd445b16b533d2f87661bf12e for pr-55192-2
Oct 27 10:58:09.996 INFO running `"docker" "create" "-v" "/mnt/big/crater/./work/local/target-dirs/pr-55192-2/worker-1/try#19f01b935b91481fd445b16b533d2f87661bf12e:/target:rw,Z" "-v" "/mnt/big/crater/./work/local/test-source/worker-1/pr-55192-2/try#19f01b935b91481fd445b16b533d2f87661bf12e:/source:ro,Z" "-v" "/mnt/big/crater/./work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/./work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +19f01b935b91481fd445b16b533d2f87661bf12e-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Oct 27 10:58:10.403 INFO blam! 06787194d2c2b5a998fd57f13d7f71b97db2b88566a98e04872ccc1d4bb119df
Oct 27 10:58:10.407 INFO running `"docker" "start" "-a" "06787194d2c2b5a998fd57f13d7f71b97db2b88566a98e04872ccc1d4bb119df"`
Oct 27 10:58:11.941 INFO kablam! usermod: no changes
Oct 27 10:58:12.129 INFO kablam!     Checking underscore_vm v0.1.0 (/source/underscore_vm)
Oct 27 10:58:12.156 INFO kablam!     Checking rand v0.5.0-pre.0
Oct 27 10:58:12.157 INFO kablam!     Checking underscore_util v0.1.0 (/source/underscore_util)
Oct 27 10:58:12.159 INFO kablam!     Checking structopt v0.1.7
Oct 27 10:58:17.742 INFO kablam!     Checking underscore_syntax v0.1.0 (/source/underscore_syntax)
Oct 27 10:58:19.917 INFO kablam!     Checking underscore_ir v0.1.0 (/source/underscore_ir)
Oct 27 10:58:22.088 INFO kablam!     Checking underscore_semant v0.1.0 (/source/underscore_semant)
Oct 27 10:58:22.089 INFO kablam!     Checking underscore_x86 v0.1.0 (/source/underscore_x86)
Oct 27 10:58:25.331 INFO kablam! warning: unused variable: `escapes`
Oct 27 10:58:25.331 INFO kablam!    --> underscore_semant/src/infer/function.rs:260:21
Oct 27 10:58:25.331 INFO kablam!     |
Oct 27 10:58:25.331 INFO kablam! 260 |                 ref escapes,
Oct 27 10:58:25.331 INFO kablam!     |                     ^^^^^^^ help: try ignoring the field: `escapes: _`
Oct 27 10:58:25.331 INFO kablam!     |
Oct 27 10:58:25.331 INFO kablam!     = note: #[warn(unused_variables)] on by default
Oct 27 10:58:25.331 INFO kablam! 
Oct 27 10:58:25.604 INFO kablam! warning: unused variable: `escapes`
Oct 27 10:58:25.604 INFO kablam!    --> underscore_semant/src/infer/function.rs:260:21
Oct 27 10:58:25.604 INFO kablam!     |
Oct 27 10:58:25.604 INFO kablam! 260 |                 ref escapes,
Oct 27 10:58:25.604 INFO kablam!     |                     ^^^^^^^ help: try ignoring the field: `escapes: _`
Oct 27 10:58:25.604 INFO kablam!     |
Oct 27 10:58:25.604 INFO kablam!     = note: #[warn(unused_variables)] on by default
Oct 27 10:58:25.604 INFO kablam! 
Oct 27 10:58:25.723 INFO kablam! warning: struct is never constructed: `Program`
Oct 27 10:58:25.724 INFO kablam!  --> underscore_semant/src/ast/lowered.rs:8:1
Oct 27 10:58:25.724 INFO kablam!   |
Oct 27 10:58:25.724 INFO kablam! 8 | pub struct Program {
Oct 27 10:58:25.724 INFO kablam!   | ^^^^^^^^^^^^^^^^^^
Oct 27 10:58:25.725 INFO kablam!   |
Oct 27 10:58:25.725 INFO kablam!   = note: #[warn(dead_code)] on by default
Oct 27 10:58:25.725 INFO kablam! 
Oct 27 10:58:25.726 INFO kablam! warning: struct is never constructed: `Function`
Oct 27 10:58:25.726 INFO kablam!   --> underscore_semant/src/ast/lowered.rs:13:1
Oct 27 10:58:25.726 INFO kablam!    |
Oct 27 10:58:25.726 INFO kablam! 13 | pub struct Function {
Oct 27 10:58:25.727 INFO kablam!    | ^^^^^^^^^^^^^^^^^^^
Oct 27 10:58:25.727 INFO kablam! 
Oct 27 10:58:25.727 INFO kablam! warning: struct is never constructed: `FindEscape`
Oct 27 10:58:25.727 INFO kablam!  --> underscore_semant/src/escape.rs:6:1
Oct 27 10:58:25.728 INFO kablam!   |
Oct 27 10:58:25.728 INFO kablam! 6 | pub struct FindEscape {
Oct 27 10:58:25.728 INFO kablam!   | ^^^^^^^^^^^^^^^^^^^^^
Oct 27 10:58:25.729 INFO kablam! 
Oct 27 10:58:25.729 INFO kablam! warning: method is never used: `new`
Oct 27 10:58:25.729 INFO kablam!   --> underscore_semant/src/escape.rs:11:5
Oct 27 10:58:25.729 INFO kablam!    |
Oct 27 10:58:25.730 INFO kablam! 11 |     pub fn new() -> Self {
Oct 27 10:58:25.730 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^
Oct 27 10:58:25.730 INFO kablam! 
Oct 27 10:58:25.730 INFO kablam! warning: method is never used: `find_escape`
Oct 27 10:58:25.731 INFO kablam!   --> underscore_semant/src/escape.rs:14:5
Oct 27 10:58:25.731 INFO kablam!    |
Oct 27 10:58:25.731 INFO kablam! 14 | /     pub fn find_escape(
Oct 27 10:58:25.732 INFO kablam! 15 | |         &mut self,
Oct 27 10:58:25.732 INFO kablam! 16 | |         program: &mut Program,
Oct 27 10:58:25.732 INFO kablam! 17 | |         env: &mut Symbols<(u32, bool)>,
Oct 27 10:58:25.732 INFO kablam! ...  |
Oct 27 10:58:25.733 INFO kablam! 22 | |         Ok(())
Oct 27 10:58:25.733 INFO kablam! 23 | |     }
Oct 27 10:58:25.733 INFO kablam!    | |_____^
Oct 27 10:58:25.733 INFO kablam! 
Oct 27 10:58:25.734 INFO kablam! warning: method is never used: `escape_function`
Oct 27 10:58:25.734 INFO kablam!   --> underscore_semant/src/escape.rs:25:5
Oct 27 10:58:25.734 INFO kablam!    |
Oct 27 10:58:25.734 INFO kablam! 25 | /     fn escape_function(
Oct 27 10:58:25.735 INFO kablam! 26 | |         &mut self,
Oct 27 10:58:25.735 INFO kablam! 27 | |         function: &mut Spanned<Function>,
Oct 27 10:58:25.735 INFO kablam! 28 | |         env: &mut Symbols<(u32, bool)>,
Oct 27 10:58:25.736 INFO kablam! 29 | |     ) -> InferResult<()> {
Oct 27 10:58:25.736 INFO kablam! 30 | |         self.escape_statement(&mut function.value.body, env)
Oct 27 10:58:25.736 INFO kablam! 31 | |     }
Oct 27 10:58:25.736 INFO kablam!    | |_____^
Oct 27 10:58:25.737 INFO kablam! 
Oct 27 10:58:25.737 INFO kablam! warning: method is never used: `check_ident`
Oct 27 10:58:25.737 INFO kablam!   --> underscore_semant/src/escape.rs:33:5
Oct 27 10:58:25.738 INFO kablam!    |
Oct 27 10:58:25.738 INFO kablam! 33 |     fn check_ident(&mut self, ident: Symbol, env: &mut Symbols<(u32, bool)>) -> InferResult<()> {
Oct 27 10:58:25.738 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 27 10:58:25.738 INFO kablam! 
Oct 27 10:58:25.739 INFO kablam! warning: method is never used: `escape_statement`
Oct 27 10:58:25.739 INFO kablam!    --> underscore_semant/src/escape.rs:50:5
Oct 27 10:58:25.739 INFO kablam!     |
Oct 27 10:58:25.740 INFO kablam! 50  | /     fn escape_statement(
Oct 27 10:58:25.740 INFO kablam! 51  | |         &mut self,
Oct 27 10:58:25.740 INFO kablam! 52  | |         statement: &mut Spanned<Statement>,
Oct 27 10:58:25.740 INFO kablam! 53  | |         env: &mut Symbols<(u32, bool)>,
Oct 27 10:58:25.741 INFO kablam! ...   |
Oct 27 10:58:25.741 INFO kablam! 109 | |         }
Oct 27 10:58:25.741 INFO kablam! 110 | |     }
Oct 27 10:58:25.741 INFO kablam!     | |_____^
Oct 27 10:58:25.742 INFO kablam! 
Oct 27 10:58:25.742 INFO kablam! warning: method is never used: `escape_expression`
Oct 27 10:58:25.742 INFO kablam!    --> underscore_semant/src/escape.rs:112:5
Oct 27 10:58:25.742 INFO kablam!     |
Oct 27 10:58:25.743 INFO kablam! 112 | /     fn escape_expression(
Oct 27 10:58:25.743 INFO kablam! 113 | |         &mut self,
Oct 27 10:58:25.743 INFO kablam! 114 | |         expr: &mut Spanned<Expression>,
Oct 27 10:58:25.744 INFO kablam! 115 | |         env: &mut Symbols<(u32, bool)>,
Oct 27 10:58:25.744 INFO kablam! ...   |
Oct 27 10:58:25.744 INFO kablam! 193 | |         }
Oct 27 10:58:25.744 INFO kablam! 194 | |     }
Oct 27 10:58:25.745 INFO kablam!     | |_____^
Oct 27 10:58:25.745 INFO kablam! 
Oct 27 10:58:25.745 INFO kablam! warning: method is never used: `check_var`
Oct 27 10:58:25.745 INFO kablam!    --> underscore_semant/src/escape.rs:196:5
Oct 27 10:58:25.746 INFO kablam!     |
Oct 27 10:58:25.746 INFO kablam! 196 |     fn check_var(&mut self, var: &Spanned<Var>, env: &mut Symbols<(u32, bool)>) -> InferResult<()> {
Oct 27 10:58:25.746 INFO kablam!     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 27 10:58:25.747 INFO kablam! 
Oct 27 10:58:25.898 INFO kablam! warning: struct is never constructed: `Program`
Oct 27 10:58:25.898 INFO kablam!  --> underscore_semant/src/ast/lowered.rs:8:1
Oct 27 10:58:25.898 INFO kablam!   |
Oct 27 10:58:25.899 INFO kablam! 8 | pub struct Program {
Oct 27 10:58:25.899 INFO kablam!   | ^^^^^^^^^^^^^^^^^^
Oct 27 10:58:25.899 INFO kablam!   |
Oct 27 10:58:25.900 INFO kablam!   = note: #[warn(dead_code)] on by default
Oct 27 10:58:25.900 INFO kablam! 
Oct 27 10:58:25.900 INFO kablam! warning: struct is never constructed: `Function`
Oct 27 10:58:25.900 INFO kablam!   --> underscore_semant/src/ast/lowered.rs:13:1
Oct 27 10:58:25.901 INFO kablam!    |
Oct 27 10:58:25.901 INFO kablam! 13 | pub struct Function {
Oct 27 10:58:25.901 INFO kablam!    | ^^^^^^^^^^^^^^^^^^^
Oct 27 10:58:25.901 INFO kablam! 
Oct 27 10:58:25.902 INFO kablam! warning: struct is never constructed: `FindEscape`
Oct 27 10:58:25.902 INFO kablam!  --> underscore_semant/src/escape.rs:6:1
Oct 27 10:58:25.902 INFO kablam!   |
Oct 27 10:58:25.903 INFO kablam! 6 | pub struct FindEscape {
Oct 27 10:58:25.903 INFO kablam!   | ^^^^^^^^^^^^^^^^^^^^^
Oct 27 10:58:25.903 INFO kablam! 
Oct 27 10:58:25.903 INFO kablam! warning: method is never used: `new`
Oct 27 10:58:25.904 INFO kablam!   --> underscore_semant/src/escape.rs:11:5
Oct 27 10:58:25.904 INFO kablam!    |
Oct 27 10:58:25.904 INFO kablam! 11 |     pub fn new() -> Self {
Oct 27 10:58:25.904 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^
Oct 27 10:58:25.905 INFO kablam! 
Oct 27 10:58:25.905 INFO kablam! warning: method is never used: `find_escape`
Oct 27 10:58:25.905 INFO kablam!   --> underscore_semant/src/escape.rs:14:5
Oct 27 10:58:25.905 INFO kablam!    |
Oct 27 10:58:25.906 INFO kablam! 14 | /     pub fn find_escape(
Oct 27 10:58:25.906 INFO kablam! 15 | |         &mut self,
Oct 27 10:58:25.906 INFO kablam! 16 | |         program: &mut Program,
Oct 27 10:58:25.907 INFO kablam! 17 | |         env: &mut Symbols<(u32, bool)>,
Oct 27 10:58:25.907 INFO kablam! ...  |
Oct 27 10:58:25.907 INFO kablam! 22 | |         Ok(())
Oct 27 10:58:25.907 INFO kablam! 23 | |     }
Oct 27 10:58:25.908 INFO kablam!    | |_____^
Oct 27 10:58:25.908 INFO kablam! 
Oct 27 10:58:25.908 INFO kablam! warning: method is never used: `escape_function`
Oct 27 10:58:25.908 INFO kablam!   --> underscore_semant/src/escape.rs:25:5
Oct 27 10:58:25.909 INFO kablam!    |
Oct 27 10:58:25.909 INFO kablam! 25 | /     fn escape_function(
Oct 27 10:58:25.909 INFO kablam! 26 | |         &mut self,
Oct 27 10:58:25.909 INFO kablam! 27 | |         function: &mut Spanned<Function>,
Oct 27 10:58:25.910 INFO kablam! 28 | |         env: &mut Symbols<(u32, bool)>,
Oct 27 10:58:25.910 INFO kablam! 29 | |     ) -> InferResult<()> {
Oct 27 10:58:25.910 INFO kablam! 30 | |         self.escape_statement(&mut function.value.body, env)
Oct 27 10:58:25.910 INFO kablam! 31 | |     }
Oct 27 10:58:25.911 INFO kablam!    | |_____^
Oct 27 10:58:25.911 INFO kablam! 
Oct 27 10:58:25.911 INFO kablam! warning: method is never used: `check_ident`
Oct 27 10:58:25.912 INFO kablam!   --> underscore_semant/src/escape.rs:33:5
Oct 27 10:58:25.912 INFO kablam!    |
Oct 27 10:58:25.912 INFO kablam! 33 |     fn check_ident(&mut self, ident: Symbol, env: &mut Symbols<(u32, bool)>) -> InferResult<()> {
Oct 27 10:58:25.912 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 27 10:58:25.913 INFO kablam! 
Oct 27 10:58:25.913 INFO kablam! warning: method is never used: `escape_statement`
Oct 27 10:58:25.913 INFO kablam!    --> underscore_semant/src/escape.rs:50:5
Oct 27 10:58:25.913 INFO kablam!     |
Oct 27 10:58:25.914 INFO kablam! 50  | /     fn escape_statement(
Oct 27 10:58:25.914 INFO kablam! 51  | |         &mut self,
Oct 27 10:58:25.914 INFO kablam! 52  | |         statement: &mut Spanned<Statement>,
Oct 27 10:58:25.914 INFO kablam! 53  | |         env: &mut Symbols<(u32, bool)>,
Oct 27 10:58:25.915 INFO kablam! ...   |
Oct 27 10:58:25.915 INFO kablam! 109 | |         }
Oct 27 10:58:25.915 INFO kablam! 110 | |     }
Oct 27 10:58:25.915 INFO kablam!     | |_____^
Oct 27 10:58:25.916 INFO kablam! 
Oct 27 10:58:25.916 INFO kablam! warning: method is never used: `escape_expression`
Oct 27 10:58:25.916 INFO kablam!    --> underscore_semant/src/escape.rs:112:5
Oct 27 10:58:25.916 INFO kablam!     |
Oct 27 10:58:25.917 INFO kablam! 112 | /     fn escape_expression(
Oct 27 10:58:25.917 INFO kablam! 113 | |         &mut self,
Oct 27 10:58:25.917 INFO kablam! 114 | |         expr: &mut Spanned<Expression>,
Oct 27 10:58:25.917 INFO kablam! 115 | |         env: &mut Symbols<(u32, bool)>,
Oct 27 10:58:25.918 INFO kablam! ...   |
Oct 27 10:58:25.918 INFO kablam! 193 | |         }
Oct 27 10:58:25.918 INFO kablam! 194 | |     }
Oct 27 10:58:25.922 INFO kablam!     | |_____^
Oct 27 10:58:25.922 INFO kablam! 
Oct 27 10:58:25.923 INFO kablam! warning: method is never used: `check_var`
Oct 27 10:58:25.923 INFO kablam!    --> underscore_semant/src/escape.rs:196:5
Oct 27 10:58:25.923 INFO kablam!     |
Oct 27 10:58:25.923 INFO kablam! 196 |     fn check_var(&mut self, var: &Spanned<Var>, env: &mut Symbols<(u32, bool)>) -> InferResult<()> {
Oct 27 10:58:25.923 INFO kablam!     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 27 10:58:25.923 INFO kablam! 
Oct 27 10:58:25.987 INFO kablam!     Checking underscore v0.1.0 (/source/underscore)
Oct 27 10:58:27.607 INFO kablam! warning: unused `#[macro_use]` import
Oct 27 10:58:27.607 INFO kablam!  --> underscore/src/main.rs:8:1
Oct 27 10:58:27.607 INFO kablam!   |
Oct 27 10:58:27.607 INFO kablam! 8 | #[macro_use]
Oct 27 10:58:27.607 INFO kablam!   | ^^^^^^^^^^^^
Oct 27 10:58:27.607 INFO kablam!   |
Oct 27 10:58:27.607 INFO kablam!   = note: #[warn(unused_imports)] on by default
Oct 27 10:58:27.607 INFO kablam! 
Oct 27 10:58:27.943 INFO kablam! warning: unused `#[macro_use]` import
Oct 27 10:58:27.943 INFO kablam!  --> underscore/src/main.rs:8:1
Oct 27 10:58:27.943 INFO kablam!   |
Oct 27 10:58:27.943 INFO kablam! 8 | #[macro_use]
Oct 27 10:58:27.943 INFO kablam!   | ^^^^^^^^^^^^
Oct 27 10:58:27.943 INFO kablam!   |
Oct 27 10:58:27.943 INFO kablam!   = note: #[warn(unused_imports)] on by default
Oct 27 10:58:27.943 INFO kablam! 
Oct 27 10:58:28.087 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 16.10s
Oct 27 10:58:28.107 INFO kablam! su: No module specific data is present
Oct 27 10:58:28.691 INFO running `"docker" "rm" "-f" "06787194d2c2b5a998fd57f13d7f71b97db2b88566a98e04872ccc1d4bb119df"`
Oct 27 10:58:28.939 INFO blam! 06787194d2c2b5a998fd57f13d7f71b97db2b88566a98e04872ccc1d4bb119df