Oct 13 03:51:45.233 INFO checking Lapz/undisclosed against try#4021bd0b3c5815b087d6db10ce461e7e4854ade7 for pr-54977
Oct 13 03:51:45.233 INFO running `"docker" "create" "-v" "/mnt/big/crater/./work/local/target-dirs/pr-54977/worker-0/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/target:rw,Z" "-v" "/mnt/big/crater/./work/local/test-source/worker-0/pr-54977/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/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 +4021bd0b3c5815b087d6db10ce461e7e4854ade7-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 13 03:51:45.898 INFO blam! 5584c645671265ed2342295fbfed909488ae48afaee725e612ed0904311f797b
Oct 13 03:51:45.899 INFO running `"docker" "start" "-a" "5584c645671265ed2342295fbfed909488ae48afaee725e612ed0904311f797b"`
Oct 13 03:51:47.417 INFO kablam! usermod: no changes
Oct 13 03:51:47.524 INFO kablam!     Checking underscore_vm v0.1.0 (/source/underscore_vm)
Oct 13 03:51:47.532 INFO kablam!     Checking underscore_util v0.1.0 (/source/underscore_util)
Oct 13 03:51:47.532 INFO kablam!     Checking rand v0.5.0-pre.0
Oct 13 03:51:47.556 INFO kablam!     Checking walkdir v2.1.3
Oct 13 03:51:47.568 INFO kablam!     Checking structopt v0.1.7
Oct 13 03:51:53.490 INFO kablam!     Checking underscore_syntax v0.1.0 (/source/underscore_syntax)
Oct 13 03:51:55.552 INFO kablam!     Checking underscore_ir v0.1.0 (/source/underscore_ir)
Oct 13 03:51:57.060 INFO kablam!     Checking underscore_semant v0.1.0 (/source/underscore_semant)
Oct 13 03:51:57.060 INFO kablam!     Checking underscore_x86 v0.1.0 (/source/underscore_x86)
Oct 13 03:52:00.827 INFO kablam! warning: unused variable: `escapes`
Oct 13 03:52:00.827 INFO kablam!    --> underscore_semant/src/infer/function.rs:260:21
Oct 13 03:52:00.828 INFO kablam!     |
Oct 13 03:52:00.828 INFO kablam! 260 |                 ref escapes,
Oct 13 03:52:00.828 INFO kablam!     |                     ^^^^^^^ help: try ignoring the field: `escapes: _`
Oct 13 03:52:00.828 INFO kablam!     |
Oct 13 03:52:00.828 INFO kablam!     = note: #[warn(unused_variables)] on by default
Oct 13 03:52:00.829 INFO kablam! 
Oct 13 03:52:00.895 INFO kablam! warning: unused variable: `escapes`
Oct 13 03:52:00.895 INFO kablam!    --> underscore_semant/src/infer/function.rs:260:21
Oct 13 03:52:00.896 INFO kablam!     |
Oct 13 03:52:00.896 INFO kablam! 260 |                 ref escapes,
Oct 13 03:52:00.896 INFO kablam!     |                     ^^^^^^^ help: try ignoring the field: `escapes: _`
Oct 13 03:52:00.897 INFO kablam!     |
Oct 13 03:52:00.897 INFO kablam!     = note: #[warn(unused_variables)] on by default
Oct 13 03:52:00.897 INFO kablam! 
Oct 13 03:52:01.111 INFO kablam! warning: struct is never constructed: `Program`
Oct 13 03:52:01.112 INFO kablam!  --> underscore_semant/src/ast/lowered.rs:8:1
Oct 13 03:52:01.112 INFO kablam!   |
Oct 13 03:52:01.112 INFO kablam! 8 | pub struct Program {
Oct 13 03:52:01.113 INFO kablam!   | ^^^^^^^^^^^^^^^^^^
Oct 13 03:52:01.114 INFO kablam!   |
Oct 13 03:52:01.114 INFO kablam!   = note: #[warn(dead_code)] on by default
Oct 13 03:52:01.114 INFO kablam! 
Oct 13 03:52:01.114 INFO kablam! warning: struct is never constructed: `Function`
Oct 13 03:52:01.114 INFO kablam!   --> underscore_semant/src/ast/lowered.rs:13:1
Oct 13 03:52:01.115 INFO kablam!    |
Oct 13 03:52:01.115 INFO kablam! 13 | pub struct Function {
Oct 13 03:52:01.115 INFO kablam!    | ^^^^^^^^^^^^^^^^^^^
Oct 13 03:52:01.115 INFO kablam! 
Oct 13 03:52:01.116 INFO kablam! warning: struct is never constructed: `FindEscape`
Oct 13 03:52:01.116 INFO kablam!  --> underscore_semant/src/escape.rs:6:1
Oct 13 03:52:01.116 INFO kablam!   |
Oct 13 03:52:01.117 INFO kablam! 6 | pub struct FindEscape {
Oct 13 03:52:01.117 INFO kablam!   | ^^^^^^^^^^^^^^^^^^^^^
Oct 13 03:52:01.117 INFO kablam! 
Oct 13 03:52:01.118 INFO kablam! warning: method is never used: `new`
Oct 13 03:52:01.118 INFO kablam!   --> underscore_semant/src/escape.rs:11:5
Oct 13 03:52:01.118 INFO kablam!    |
Oct 13 03:52:01.119 INFO kablam! 11 |     pub fn new() -> Self {
Oct 13 03:52:01.119 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^
Oct 13 03:52:01.119 INFO kablam! 
Oct 13 03:52:01.119 INFO kablam! warning: method is never used: `find_escape`
Oct 13 03:52:01.119 INFO kablam!   --> underscore_semant/src/escape.rs:14:5
Oct 13 03:52:01.119 INFO kablam!    |
Oct 13 03:52:01.120 INFO kablam! 14 | /     pub fn find_escape(
Oct 13 03:52:01.120 INFO kablam! 15 | |         &mut self,
Oct 13 03:52:01.120 INFO kablam! 16 | |         program: &mut Program,
Oct 13 03:52:01.120 INFO kablam! 17 | |         env: &mut Symbols<(u32, bool)>,
Oct 13 03:52:01.120 INFO kablam! ...  |
Oct 13 03:52:01.121 INFO kablam! 22 | |         Ok(())
Oct 13 03:52:01.121 INFO kablam! 23 | |     }
Oct 13 03:52:01.121 INFO kablam!    | |_____^
Oct 13 03:52:01.121 INFO kablam! 
Oct 13 03:52:01.121 INFO kablam! warning: method is never used: `escape_function`
Oct 13 03:52:01.122 INFO kablam!   --> underscore_semant/src/escape.rs:25:5
Oct 13 03:52:01.122 INFO kablam!    |
Oct 13 03:52:01.122 INFO kablam! 25 | /     fn escape_function(
Oct 13 03:52:01.122 INFO kablam! 26 | |         &mut self,
Oct 13 03:52:01.122 INFO kablam! 27 | |         function: &mut Spanned<Function>,
Oct 13 03:52:01.122 INFO kablam! 28 | |         env: &mut Symbols<(u32, bool)>,
Oct 13 03:52:01.123 INFO kablam! 29 | |     ) -> InferResult<()> {
Oct 13 03:52:01.123 INFO kablam! 30 | |         self.escape_statement(&mut function.value.body, env)
Oct 13 03:52:01.123 INFO kablam! 31 | |     }
Oct 13 03:52:01.123 INFO kablam!    | |_____^
Oct 13 03:52:01.129 INFO kablam! 
Oct 13 03:52:01.129 INFO kablam! warning: method is never used: `check_ident`
Oct 13 03:52:01.129 INFO kablam!   --> underscore_semant/src/escape.rs:33:5
Oct 13 03:52:01.129 INFO kablam!    |
Oct 13 03:52:01.129 INFO kablam! 33 |     fn check_ident(&mut self, ident: Symbol, env: &mut Symbols<(u32, bool)>) -> InferResult<()> {
Oct 13 03:52:01.130 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 13 03:52:01.130 INFO kablam! 
Oct 13 03:52:01.130 INFO kablam! warning: method is never used: `escape_statement`
Oct 13 03:52:01.130 INFO kablam!    --> underscore_semant/src/escape.rs:50:5
Oct 13 03:52:01.130 INFO kablam!     |
Oct 13 03:52:01.131 INFO kablam! 50  | /     fn escape_statement(
Oct 13 03:52:01.131 INFO kablam! 51  | |         &mut self,
Oct 13 03:52:01.131 INFO kablam! 52  | |         statement: &mut Spanned<Statement>,
Oct 13 03:52:01.131 INFO kablam! 53  | |         env: &mut Symbols<(u32, bool)>,
Oct 13 03:52:01.131 INFO kablam! ...   |
Oct 13 03:52:01.132 INFO kablam! 109 | |         }
Oct 13 03:52:01.132 INFO kablam! 110 | |     }
Oct 13 03:52:01.132 INFO kablam!     | |_____^
Oct 13 03:52:01.132 INFO kablam! 
Oct 13 03:52:01.132 INFO kablam! warning: method is never used: `escape_expression`
Oct 13 03:52:01.133 INFO kablam!    --> underscore_semant/src/escape.rs:112:5
Oct 13 03:52:01.133 INFO kablam!     |
Oct 13 03:52:01.133 INFO kablam! 112 | /     fn escape_expression(
Oct 13 03:52:01.133 INFO kablam! 113 | |         &mut self,
Oct 13 03:52:01.133 INFO kablam! 114 | |         expr: &mut Spanned<Expression>,
Oct 13 03:52:01.134 INFO kablam! 115 | |         env: &mut Symbols<(u32, bool)>,
Oct 13 03:52:01.134 INFO kablam! ...   |
Oct 13 03:52:01.134 INFO kablam! 193 | |         }
Oct 13 03:52:01.134 INFO kablam! 194 | |     }
Oct 13 03:52:01.134 INFO kablam!     | |_____^
Oct 13 03:52:01.135 INFO kablam! 
Oct 13 03:52:01.135 INFO kablam! warning: method is never used: `check_var`
Oct 13 03:52:01.135 INFO kablam!    --> underscore_semant/src/escape.rs:196:5
Oct 13 03:52:01.135 INFO kablam!     |
Oct 13 03:52:01.135 INFO kablam! 196 |     fn check_var(&mut self, var: &Spanned<Var>, env: &mut Symbols<(u32, bool)>) -> InferResult<()> {
Oct 13 03:52:01.136 INFO kablam!     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 13 03:52:01.136 INFO kablam! 
Oct 13 03:52:01.215 INFO kablam!     Checking underscore v0.1.0 (/source/underscore)
Oct 13 03:52:01.225 INFO kablam! warning: struct is never constructed: `Program`
Oct 13 03:52:01.225 INFO kablam!  --> underscore_semant/src/ast/lowered.rs:8:1
Oct 13 03:52:01.226 INFO kablam!   |
Oct 13 03:52:01.226 INFO kablam! 8 | pub struct Program {
Oct 13 03:52:01.226 INFO kablam!   | ^^^^^^^^^^^^^^^^^^
Oct 13 03:52:01.227 INFO kablam!   |
Oct 13 03:52:01.227 INFO kablam!   = note: #[warn(dead_code)] on by default
Oct 13 03:52:01.227 INFO kablam! 
Oct 13 03:52:01.227 INFO kablam! warning: struct is never constructed: `Function`
Oct 13 03:52:01.227 INFO kablam!   --> underscore_semant/src/ast/lowered.rs:13:1
Oct 13 03:52:01.227 INFO kablam!    |
Oct 13 03:52:01.228 INFO kablam! 13 | pub struct Function {
Oct 13 03:52:01.228 INFO kablam!    | ^^^^^^^^^^^^^^^^^^^
Oct 13 03:52:01.228 INFO kablam! 
Oct 13 03:52:01.228 INFO kablam! warning: struct is never constructed: `FindEscape`
Oct 13 03:52:01.229 INFO kablam!  --> underscore_semant/src/escape.rs:6:1
Oct 13 03:52:01.229 INFO kablam!   |
Oct 13 03:52:01.233 INFO kablam! 6 | pub struct FindEscape {
Oct 13 03:52:01.233 INFO kablam!   | ^^^^^^^^^^^^^^^^^^^^^
Oct 13 03:52:01.233 INFO kablam! 
Oct 13 03:52:01.233 INFO kablam! warning: method is never used: `new`
Oct 13 03:52:01.234 INFO kablam!   --> underscore_semant/src/escape.rs:11:5
Oct 13 03:52:01.234 INFO kablam!    |
Oct 13 03:52:01.234 INFO kablam! 11 |     pub fn new() -> Self {
Oct 13 03:52:01.234 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^
Oct 13 03:52:01.235 INFO kablam! 
Oct 13 03:52:01.235 INFO kablam! warning: method is never used: `find_escape`
Oct 13 03:52:01.235 INFO kablam!   --> underscore_semant/src/escape.rs:14:5
Oct 13 03:52:01.235 INFO kablam!    |
Oct 13 03:52:01.236 INFO kablam! 14 | /     pub fn find_escape(
Oct 13 03:52:01.236 INFO kablam! 15 | |         &mut self,
Oct 13 03:52:01.236 INFO kablam! 16 | |         program: &mut Program,
Oct 13 03:52:01.236 INFO kablam! 17 | |         env: &mut Symbols<(u32, bool)>,
Oct 13 03:52:01.237 INFO kablam! ...  |
Oct 13 03:52:01.237 INFO kablam! 22 | |         Ok(())
Oct 13 03:52:01.237 INFO kablam! 23 | |     }
Oct 13 03:52:01.237 INFO kablam!    | |_____^
Oct 13 03:52:01.238 INFO kablam! 
Oct 13 03:52:01.238 INFO kablam! warning: method is never used: `escape_function`
Oct 13 03:52:01.238 INFO kablam!   --> underscore_semant/src/escape.rs:25:5
Oct 13 03:52:01.239 INFO kablam!    |
Oct 13 03:52:01.239 INFO kablam! 25 | /     fn escape_function(
Oct 13 03:52:01.239 INFO kablam! 26 | |         &mut self,
Oct 13 03:52:01.239 INFO kablam! 27 | |         function: &mut Spanned<Function>,
Oct 13 03:52:01.240 INFO kablam! 28 | |         env: &mut Symbols<(u32, bool)>,
Oct 13 03:52:01.240 INFO kablam! 29 | |     ) -> InferResult<()> {
Oct 13 03:52:01.240 INFO kablam! 30 | |         self.escape_statement(&mut function.value.body, env)
Oct 13 03:52:01.241 INFO kablam! 31 | |     }
Oct 13 03:52:01.241 INFO kablam!    | |_____^
Oct 13 03:52:01.241 INFO kablam! 
Oct 13 03:52:01.241 INFO kablam! warning: method is never used: `check_ident`
Oct 13 03:52:01.242 INFO kablam!   --> underscore_semant/src/escape.rs:33:5
Oct 13 03:52:01.242 INFO kablam!    |
Oct 13 03:52:01.242 INFO kablam! 33 |     fn check_ident(&mut self, ident: Symbol, env: &mut Symbols<(u32, bool)>) -> InferResult<()> {
Oct 13 03:52:01.243 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 13 03:52:01.243 INFO kablam! 
Oct 13 03:52:01.243 INFO kablam! warning: method is never used: `escape_statement`
Oct 13 03:52:01.243 INFO kablam!    --> underscore_semant/src/escape.rs:50:5
Oct 13 03:52:01.244 INFO kablam!     |
Oct 13 03:52:01.244 INFO kablam! 50  | /     fn escape_statement(
Oct 13 03:52:01.244 INFO kablam! 51  | |         &mut self,
Oct 13 03:52:01.244 INFO kablam! 52  | |         statement: &mut Spanned<Statement>,
Oct 13 03:52:01.245 INFO kablam! 53  | |         env: &mut Symbols<(u32, bool)>,
Oct 13 03:52:01.245 INFO kablam! ...   |
Oct 13 03:52:01.245 INFO kablam! 109 | |         }
Oct 13 03:52:01.245 INFO kablam! 110 | |     }
Oct 13 03:52:01.246 INFO kablam!     | |_____^
Oct 13 03:52:01.246 INFO kablam! 
Oct 13 03:52:01.246 INFO kablam! warning: method is never used: `escape_expression`
Oct 13 03:52:01.246 INFO kablam!    --> underscore_semant/src/escape.rs:112:5
Oct 13 03:52:01.247 INFO kablam!     |
Oct 13 03:52:01.247 INFO kablam! 112 | /     fn escape_expression(
Oct 13 03:52:01.247 INFO kablam! 113 | |         &mut self,
Oct 13 03:52:01.247 INFO kablam! 114 | |         expr: &mut Spanned<Expression>,
Oct 13 03:52:01.248 INFO kablam! 115 | |         env: &mut Symbols<(u32, bool)>,
Oct 13 03:52:01.248 INFO kablam! ...   |
Oct 13 03:52:01.248 INFO kablam! 193 | |         }
Oct 13 03:52:01.248 INFO kablam! 194 | |     }
Oct 13 03:52:01.248 INFO kablam!     | |_____^
Oct 13 03:52:01.249 INFO kablam! 
Oct 13 03:52:01.249 INFO kablam! warning: method is never used: `check_var`
Oct 13 03:52:01.249 INFO kablam!    --> underscore_semant/src/escape.rs:196:5
Oct 13 03:52:01.250 INFO kablam!     |
Oct 13 03:52:01.250 INFO kablam! 196 |     fn check_var(&mut self, var: &Spanned<Var>, env: &mut Symbols<(u32, bool)>) -> InferResult<()> {
Oct 13 03:52:01.250 INFO kablam!     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 13 03:52:01.250 INFO kablam! 
Oct 13 03:52:03.880 INFO kablam! warning: unused `#[macro_use]` import
Oct 13 03:52:03.881 INFO kablam!  --> underscore/src/main.rs:8:1
Oct 13 03:52:03.881 INFO kablam!   |
Oct 13 03:52:03.881 INFO kablam! 8 | #[macro_use]
Oct 13 03:52:03.881 INFO kablam!   | ^^^^^^^^^^^^
Oct 13 03:52:03.881 INFO kablam!   |
Oct 13 03:52:03.881 INFO kablam!   = note: #[warn(unused_imports)] on by default
Oct 13 03:52:03.881 INFO kablam! 
Oct 13 03:52:04.080 INFO kablam! warning: unused `#[macro_use]` import
Oct 13 03:52:04.080 INFO kablam!  --> underscore/src/main.rs:8:1
Oct 13 03:52:04.081 INFO kablam!   |
Oct 13 03:52:04.085 INFO kablam! 8 | #[macro_use]
Oct 13 03:52:04.085 INFO kablam!   | ^^^^^^^^^^^^
Oct 13 03:52:04.085 INFO kablam!   |
Oct 13 03:52:04.085 INFO kablam!   = note: #[warn(unused_imports)] on by default
Oct 13 03:52:04.086 INFO kablam! 
Oct 13 03:52:04.287 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 16.83s
Oct 13 03:52:04.300 INFO kablam! su: No module specific data is present
Oct 13 03:52:05.513 INFO running `"docker" "rm" "-f" "5584c645671265ed2342295fbfed909488ae48afaee725e612ed0904311f797b"`
Oct 13 03:52:05.740 INFO blam! 5584c645671265ed2342295fbfed909488ae48afaee725e612ed0904311f797b