[INFO] cloning repository https://github.com/CopperWasp/Rust_exercise
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/CopperWasp/Rust_exercise" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCopperWasp%2FRust_exercise"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCopperWasp%2FRust_exercise'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9118d5e6f72440328eb60a5b7f6fbea47980abe5
[INFO] checking CopperWasp/Rust_exercise against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCopperWasp%2FRust_exercise" "/workspace/builds/worker-6/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/CopperWasp/Rust_exercise on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/CopperWasp/Rust_exercise
[INFO] finished tweaking git repo https://github.com/CopperWasp/Rust_exercise
[INFO] tweaked toml for git repo https://github.com/CopperWasp/Rust_exercise written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/CopperWasp/Rust_exercise already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 5ae598e1645b4a7492918db49a3c9d66c14f4ab77c9957cf438857e84b15d448
[INFO] running `"docker" "start" "-a" "5ae598e1645b4a7492918db49a3c9d66c14f4ab77c9957cf438857e84b15d448"`
[INFO] [stderr]     Checking let_lang_proj v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0432]: unresolved import `let_lang_exp`
[INFO] [stderr]   --> src/proc_lang_env.rs:81:9
[INFO] [stderr]    |
[INFO] [stderr] 81 |     use let_lang_exp::*;
[INFO] [stderr]    |         ^^^^^^^^^^^^ maybe a missing crate `let_lang_exp`?
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/proc_lang_scanner.rs:76:9
[INFO] [stderr]    |
[INFO] [stderr] 76 |         try!(lexer.scan()); // May return from tokenize() w/ Err(LexErr). If no error, then
[INFO] [stderr]    |         ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/proc_lang_scanner.rs:126:39
[INFO] [stderr]     |
[INFO] [stderr] 126 | ...                   let tok = try!(self.scan_keywrd_ident_bool());
[INFO] [stderr]     |                                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/proc_lang_scanner.rs:128:29
[INFO] [stderr]     |
[INFO] [stderr] 128 | ...                   try!(self.parse_whitespace_paren_or_eoi());
[INFO] [stderr]     |                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/proc_lang_scanner.rs:135:47
[INFO] [stderr]     |
[INFO] [stderr] 135 | ...                   let val = try!(self.parse_number());
[INFO] [stderr]     |                                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/proc_lang_scanner.rs:137:37
[INFO] [stderr]     |
[INFO] [stderr] 137 | ...                   try!(self.parse_whitespace_paren_or_eoi());
[INFO] [stderr]     |                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/proc_lang_scanner.rs:151:47
[INFO] [stderr]     |
[INFO] [stderr] 151 | ...                   let val = try!(self.parse_number());
[INFO] [stderr]     |                                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/proc_lang_scanner.rs:153:37
[INFO] [stderr]     |
[INFO] [stderr] 153 | ...                   try!(self.parse_whitespace_paren_or_eoi());
[INFO] [stderr]     |                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/proc_lang_scanner.rs:162:39
[INFO] [stderr]     |
[INFO] [stderr] 162 | ...                   let val = try!(self.parse_number());
[INFO] [stderr]     |                                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/proc_lang_scanner.rs:164:29
[INFO] [stderr]     |
[INFO] [stderr] 164 | ...                   try!(self.parse_whitespace_paren_or_eoi());
[INFO] [stderr]     |                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/let_lang_parser.rs:185:9
[INFO] [stderr]     |
[INFO] [stderr] 185 |         try!(self.match_token(&Token::Minus));   // return with Err(ParseErr) if no match
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/let_lang_parser.rs:186:9
[INFO] [stderr]     |
[INFO] [stderr] 186 |         try!(self.match_token(&Token::Lparen));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/let_lang_parser.rs:187:18
[INFO] [stderr]     |
[INFO] [stderr] 187 |         let e1 = try!(self.parse_let_lang_exp()); // return with Err(ParseErr) if no parse
[INFO] [stderr]     |                  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/let_lang_parser.rs:188:9
[INFO] [stderr]     |
[INFO] [stderr] 188 |         try!(self.match_token(&Token::Comma));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/let_lang_parser.rs:189:18
[INFO] [stderr]     |
[INFO] [stderr] 189 |         let e2 = try!(self.parse_let_lang_exp());
[INFO] [stderr]     |                  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/let_lang_parser.rs:190:9
[INFO] [stderr]     |
[INFO] [stderr] 190 |         try!(self.match_token(&Token::Rparen));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/proc_lang_scanner.rs:125:29
[INFO] [stderr]     |
[INFO] [stderr] 125 |                         'a' ... 'z' | 'A' ... 'Z' => {
[INFO] [stderr]     |                             ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/proc_lang_scanner.rs:125:43
[INFO] [stderr]     |
[INFO] [stderr] 125 |                         'a' ... 'z' | 'A' ... 'Z' => {
[INFO] [stderr]     |                                           ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/proc_lang_scanner.rs:132:41
[INFO] [stderr]     |
[INFO] [stderr] 132 | ...                   Some('0'...'9') => {
[INFO] [stderr]     |                               ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/proc_lang_scanner.rs:148:41
[INFO] [stderr]     |
[INFO] [stderr] 148 | ...                   Some('0'...'9') => {
[INFO] [stderr]     |                               ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/proc_lang_scanner.rs:161:29
[INFO] [stderr]     |
[INFO] [stderr] 161 |                         '0' ... '9' => {
[INFO] [stderr]     |                             ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/proc_lang_scanner.rs:183:29
[INFO] [stderr]     |
[INFO] [stderr] 183 |                         'a' ... 'z' => { s.push(c);
[INFO] [stderr]     |                             ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/proc_lang_scanner.rs:185:29
[INFO] [stderr]     |
[INFO] [stderr] 185 |                         'A' ... 'Z' => { s.push(c);
[INFO] [stderr]     |                             ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/proc_lang_scanner.rs:235:28
[INFO] [stderr]     |
[INFO] [stderr] 235 |                         '0'...'9' => {
[INFO] [stderr]     |                            ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `proc_lang_env`
[INFO] [stderr]  --> src/proc_lang_exp.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use proc_lang_env;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/proc_lang_scanner.rs:76:9
[INFO] [stderr]    |
[INFO] [stderr] 76 |         try!(lexer.scan()); // May return from tokenize() w/ Err(LexErr). If no error, then
[INFO] [stderr]    |         ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/proc_lang_scanner.rs:126:39
[INFO] [stderr]     |
[INFO] [stderr] 126 | ...                   let tok = try!(self.scan_keywrd_ident_bool());
[INFO] [stderr]     |                                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/proc_lang_scanner.rs:128:29
[INFO] [stderr]     |
[INFO] [stderr] 128 | ...                   try!(self.parse_whitespace_paren_or_eoi());
[INFO] [stderr]     |                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/proc_lang_scanner.rs:135:47
[INFO] [stderr]     |
[INFO] [stderr] 135 | ...                   let val = try!(self.parse_number());
[INFO] [stderr]     |                                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/proc_lang_scanner.rs:137:37
[INFO] [stderr]     |
[INFO] [stderr] 137 | ...                   try!(self.parse_whitespace_paren_or_eoi());
[INFO] [stderr]     |                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/proc_lang_scanner.rs:151:47
[INFO] [stderr]     |
[INFO] [stderr] 151 | ...                   let val = try!(self.parse_number());
[INFO] [stderr]     |                                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/proc_lang_scanner.rs:153:37
[INFO] [stderr]     |
[INFO] [stderr] 153 | ...                   try!(self.parse_whitespace_paren_or_eoi());
[INFO] [stderr]     |                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/proc_lang_scanner.rs:162:39
[INFO] [stderr]     |
[INFO] [stderr] 162 | ...                   let val = try!(self.parse_number());
[INFO] [stderr]     |                                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/proc_lang_scanner.rs:164:29
[INFO] [stderr]     |
[INFO] [stderr] 164 | ...                   try!(self.parse_whitespace_paren_or_eoi());
[INFO] [stderr]     |                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/let_lang_parser.rs:185:9
[INFO] [stderr]     |
[INFO] [stderr] 185 |         try!(self.match_token(&Token::Minus));   // return with Err(ParseErr) if no match
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/let_lang_parser.rs:186:9
[INFO] [stderr]     |
[INFO] [stderr] 186 |         try!(self.match_token(&Token::Lparen));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/let_lang_parser.rs:187:18
[INFO] [stderr]     |
[INFO] [stderr] 187 |         let e1 = try!(self.parse_let_lang_exp()); // return with Err(ParseErr) if no parse
[INFO] [stderr]     |                  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/let_lang_parser.rs:188:9
[INFO] [stderr]     |
[INFO] [stderr] 188 |         try!(self.match_token(&Token::Comma));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/let_lang_parser.rs:189:18
[INFO] [stderr]     |
[INFO] [stderr] 189 |         let e2 = try!(self.parse_let_lang_exp());
[INFO] [stderr]     |                  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/let_lang_parser.rs:190:9
[INFO] [stderr]     |
[INFO] [stderr] 190 |         try!(self.match_token(&Token::Rparen));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/proc_lang_scanner.rs:125:29
[INFO] [stderr]     |
[INFO] [stderr] 125 |                         'a' ... 'z' | 'A' ... 'Z' => {
[INFO] [stderr]     |                             ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/proc_lang_scanner.rs:125:43
[INFO] [stderr]     |
[INFO] [stderr] 125 |                         'a' ... 'z' | 'A' ... 'Z' => {
[INFO] [stderr]     |                                           ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/proc_lang_scanner.rs:132:41
[INFO] [stderr]     |
[INFO] [stderr] 132 | ...                   Some('0'...'9') => {
[INFO] [stderr]     |                               ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/proc_lang_scanner.rs:148:41
[INFO] [stderr]     |
[INFO] [stderr] 148 | ...                   Some('0'...'9') => {
[INFO] [stderr]     |                               ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/proc_lang_scanner.rs:161:29
[INFO] [stderr]     |
[INFO] [stderr] 161 |                         '0' ... '9' => {
[INFO] [stderr]     |                             ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/proc_lang_scanner.rs:183:29
[INFO] [stderr]     |
[INFO] [stderr] 183 |                         'a' ... 'z' => { s.push(c);
[INFO] [stderr]     |                             ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/proc_lang_scanner.rs:185:29
[INFO] [stderr]     |
[INFO] [stderr] 185 |                         'A' ... 'Z' => { s.push(c);
[INFO] [stderr]     |                             ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/proc_lang_scanner.rs:235:28
[INFO] [stderr]     |
[INFO] [stderr] 235 |                         '0'...'9' => {
[INFO] [stderr]     |                            ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `proc_lang_env`
[INFO] [stderr]  --> src/proc_lang_exp.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use proc_lang_env;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `env`
[INFO] [stderr]   --> src/proc_lang_env.rs:32:58
[INFO] [stderr]    |
[INFO] [stderr] 32 |             ProcEnvExp::ExtendEnvRec(pname, bvar, pbody, env) =>
[INFO] [stderr]    |                                                          ^^^ help: if this is intentional, prefix it with an underscore: `_env`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `pname`
[INFO] [stderr]   --> src/proc_lang_env.rs:59:38
[INFO] [stderr]    |
[INFO] [stderr] 59 |             ProcEnvExp::ExtendEnvRec(pname, bvar, pbody, env) => {let mut temp = "proc ".to_string();
[INFO] [stderr]    |                                      ^^^^^ help: if this is intentional, prefix it with an underscore: `_pname`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `exp`
[INFO] [stderr]   --> src/int_bool_proc.rs:17:39
[INFO] [stderr]    |
[INFO] [stderr] 17 |             IntBoolProc::Procedure(s, exp, env) => s.to_string(), //check
[INFO] [stderr]    |                                       ^^^ help: if this is intentional, prefix it with an underscore: `_exp`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `env`
[INFO] [stderr]   --> src/int_bool_proc.rs:17:44
[INFO] [stderr]    |
[INFO] [stderr] 17 |             IntBoolProc::Procedure(s, exp, env) => s.to_string(), //check
[INFO] [stderr]    |                                            ^^^ help: if this is intentional, prefix it with an underscore: `_env`
[INFO] [stderr] 
[INFO] [stderr] warning: 28 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]   --> src/proc_lang_env.rs:88:63
[INFO] [stderr]    |
[INFO] [stderr] 88 |         let env2 = null_env.extend_env(&("var1".to_string()), 25);
[INFO] [stderr]    |                                                               ^^
[INFO] [stderr]    |                                                               |
[INFO] [stderr]    |                                                               expected enum `int_bool_proc::IntBoolProc`, found integer
[INFO] [stderr]    |                                                               help: try using a variant of the expected enum: `int_bool_proc::IntBoolProc::Integer(25)`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors; 24 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0308, E0432.
[INFO] [stderr] For more information about an error, try `rustc --explain E0308`.
[INFO] [stderr] error: could not compile `let_lang_proj`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/main.rs:84:23
[INFO] [stderr]    |
[INFO] [stderr] 84 |             let ast = try! (parse(&v));
[INFO] [stderr]    |                       ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/main.rs:120:90
[INFO] [stderr]     |
[INFO] [stderr] 120 |             ProcLangExp::ProcExp(v, e) => Some(IntBoolProc::Procedure(v.clone(), Rc::new(((*e). clone())), Rc::new(env.clone()))),
[INFO] [stderr]     |                                                                                          ^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/main.rs:84:23
[INFO] [stderr]    |
[INFO] [stderr] 84 |             let ast = try! (parse(&v));
[INFO] [stderr]    |                       ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/main.rs:120:90
[INFO] [stderr]     |
[INFO] [stderr] 120 |             ProcLangExp::ProcExp(v, e) => Some(IntBoolProc::Procedure(v.clone(), Rc::new(((*e). clone())), Rc::new(env.clone()))),
[INFO] [stderr]     |                                                                                          ^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `show_parse`
[INFO] [stderr]   --> src/main.rs:79:4
[INFO] [stderr]    |
[INFO] [stderr] 79 | fn show_parse(s: &String) -> Result <ProcLangExp, ParseErr> {
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `show_parse`
[INFO] [stderr]   --> src/main.rs:79:4
[INFO] [stderr]    |
[INFO] [stderr] 79 | fn show_parse(s: &String) -> Result <ProcLangExp, ParseErr> {
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "5ae598e1645b4a7492918db49a3c9d66c14f4ab77c9957cf438857e84b15d448"`
[INFO] running `"docker" "rm" "-f" "5ae598e1645b4a7492918db49a3c9d66c14f4ab77c9957cf438857e84b15d448"`
[INFO] [stdout] 5ae598e1645b4a7492918db49a3c9d66c14f4ab77c9957cf438857e84b15d448