[INFO] updating cached repository https://github.com/honzasp/spiral
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ed506c02aa90a248799f6b84fb0de19ad6f396ab
[INFO] testing honzasp/spiral against beta-2020-06-03 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhonzasp%2Fspiral" "/workspace/builds/worker-5/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/honzasp/spiral on toolchain beta-2020-06-03
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/honzasp/spiral
[INFO] finished tweaking git repo https://github.com/honzasp/spiral
[INFO] tweaked toml for git repo https://github.com/honzasp/spiral written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/honzasp/spiral already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /workspace/builds/worker-5/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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=warn" "-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" "+beta-2020-06-03" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] abd9890449c10b4114fd945ae5c86f62031a78c6221309c6f07b2871aa452003
[INFO] running `"docker" "start" "-a" "abd9890449c10b4114fd945ae5c86f62031a78c6221309c6f07b2871aa452003"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]    Compiling winapi v0.2.8
[INFO] [stderr]    Compiling regex-syntax v0.3.9
[INFO] [stderr]    Compiling utf8-ranges v0.1.3
[INFO] [stderr]    Compiling rustc-serialize v0.3.24
[INFO] [stderr]    Compiling remove_dir_all v0.5.2
[INFO] [stderr]    Compiling bit-vec v0.4.4
[INFO] [stderr]    Compiling lazy_static v0.2.11
[INFO] [stderr]    Compiling strsim v0.5.2
[INFO] [stderr]    Compiling memchr v0.1.11
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling aho-corasick v0.5.3
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]    Compiling bit-set v0.4.0
[INFO] [stderr]    Compiling thread-id v2.0.0
[INFO] [stderr]    Compiling thread_local v0.2.7
[INFO] [stderr]    Compiling tempdir v0.3.7
[INFO] [stderr]    Compiling regex v0.1.80
[INFO] [stderr]    Compiling docopt v0.6.86
[INFO] [stderr]    Compiling spiral v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(box_syntax, str_char, iter_arith)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/sexpr/parse.rs:92:22
[INFO] [stderr]    |
[INFO] [stderr] 92 |             buf.push(try!(escape_char(esc)));
[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/sexpr/parse.rs:116:21
[INFO] [stderr]     |
[INFO] [stderr] 116 |         character = try!(escape_char(esc));
[INFO] [stderr]     |                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]  --> src/sexpr/to_spiral.rs:8:26
[INFO] [stderr]   |
[INFO] [stderr] 8 |         Ok(Prog { stmts: try!(stmts_from_sexprs(&list[1..])) }),
[INFO] [stderr]   |                          ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/sexpr/to_spiral.rs:19:17
[INFO] [stderr]    |
[INFO] [stderr] 19 |         let _ = try!(match list[0] {
[INFO] [stderr]    |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/sexpr/to_spiral.rs:24:24
[INFO] [stderr]    |
[INFO] [stderr] 24 |         let mod_name = try!(mod_name_from_sexpr(&list[1]));
[INFO] [stderr]    |                        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/sexpr/to_spiral.rs:25:21
[INFO] [stderr]    |
[INFO] [stderr] 25 |         let decls = try!(decls_from_sexprs(&list[2..]));
[INFO] [stderr]    |                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/sexpr/to_spiral.rs:38:16
[INFO] [stderr]    |
[INFO] [stderr] 38 |     decls.push(try!(decl_from_sexpr(elem)));
[INFO] [stderr]    |                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/sexpr/to_spiral.rs:54:24
[INFO] [stderr]    |
[INFO] [stderr] 54 |   return Ok(Decl::Stmt(try!(stmt_from_sexpr(decl))));
[INFO] [stderr]    |                        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/sexpr/to_spiral.rs:60:15
[INFO] [stderr]    |
[INFO] [stderr] 60 |     vars.push(try!(var_from_sexpr(elem)));
[INFO] [stderr]    |               ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/sexpr/to_spiral.rs:68:16
[INFO] [stderr]    |
[INFO] [stderr] 68 |     stmts.push(try!(stmt_from_sexpr(elem)));
[INFO] [stderr]    |                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/sexpr/to_spiral.rs:86:24
[INFO] [stderr]    |
[INFO] [stderr] 86 |   return Ok(Stmt::Expr(try!(expr_from_sexpr(stmt))));
[INFO] [stderr]    |                        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/sexpr/to_spiral.rs:92:12
[INFO] [stderr]    |
[INFO] [stderr] 92 |       var: try!(var_from_sexpr(&elems[0])),
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/sexpr/to_spiral.rs:93:13
[INFO] [stderr]    |
[INFO] [stderr] 93 |       args: try!(vars_from_sexpr(&elems[1])),
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/sexpr/to_spiral.rs:94:14
[INFO] [stderr]    |
[INFO] [stderr] 94 |       stmts: try!(stmts_from_sexprs(&elems[2..])),
[INFO] [stderr]    |              ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/sexpr/to_spiral.rs:104:15
[INFO] [stderr]     |
[INFO] [stderr] 104 |     let var = try!(var_from_sexpr(&elems[0]));
[INFO] [stderr]     |               ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/sexpr/to_spiral.rs:105:17
[INFO] [stderr]     |
[INFO] [stderr] 105 |     let value = try!(expr_from_sexpr(&elems[1]));
[INFO] [stderr]     |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/sexpr/to_spiral.rs:115:22
[INFO] [stderr]     |
[INFO] [stderr] 115 |     import_defs.push(try!(import_def_from_sexpr(elem)));
[INFO] [stderr]     |                      ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/sexpr/to_spiral.rs:123:17
[INFO] [stderr]     |
[INFO] [stderr] 123 |       let def = try!(import_def_from_sexpr(&elems[0]));
[INFO] [stderr]     |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/sexpr/to_spiral.rs:124:18
[INFO] [stderr]     |
[INFO] [stderr] 124 |       let vars = try!(vars_from_sexprs(&elems[1..]));
[INFO] [stderr]     |                  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/sexpr/to_spiral.rs:133:17
[INFO] [stderr]     |
[INFO] [stderr] 133 |       let def = try!(import_def_from_sexpr(&elems[0]));
[INFO] [stderr]     |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/sexpr/to_spiral.rs:134:18
[INFO] [stderr]     |
[INFO] [stderr] 134 |       let vars = try!(vars_from_sexprs(&elems[1..]));
[INFO] [stderr]     |                  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/sexpr/to_spiral.rs:143:17
[INFO] [stderr]     |
[INFO] [stderr] 143 |       let def = try!(import_def_from_sexpr(&elems[0]));
[INFO] [stderr]     |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/sexpr/to_spiral.rs:144:20
[INFO] [stderr]     |
[INFO] [stderr] 144 |       let prefix = try!(var_from_sexpr(&elems[1]));
[INFO] [stderr]     |                    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/sexpr/to_spiral.rs:204:16
[INFO] [stderr]     |
[INFO] [stderr] 204 |     exprs.push(try!(expr_from_sexpr(elem)));
[INFO] [stderr]     |                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/sexpr/to_spiral.rs:211:16
[INFO] [stderr]     |
[INFO] [stderr] 211 |     let cond = try!(expr_from_sexpr(&elems[0]));
[INFO] [stderr]     |                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/sexpr/to_spiral.rs:212:18
[INFO] [stderr]     |
[INFO] [stderr] 212 |     let then_e = try!(expr_from_sexpr(&elems[1]));
[INFO] [stderr]     |                  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/sexpr/to_spiral.rs:213:18
[INFO] [stderr]     |
[INFO] [stderr] 213 |     let else_e = try!(expr_from_sexpr(&elems[2]));
[INFO] [stderr]     |                  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/sexpr/to_spiral.rs:226:26
[INFO] [stderr]     |
[INFO] [stderr] 226 |           let arm_cond = try!(expr_from_sexpr(&arm_elems[0]));
[INFO] [stderr]     |                          ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/sexpr/to_spiral.rs:227:27
[INFO] [stderr]     |
[INFO] [stderr] 227 |           let arm_stmts = try!(stmts_from_sexprs(&arm_elems[1..]));
[INFO] [stderr]     |                           ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/sexpr/to_spiral.rs:241:16
[INFO] [stderr]     |
[INFO] [stderr] 241 |     let cond = try!(expr_from_sexpr(&elems[0]));
[INFO] [stderr]     |                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/sexpr/to_spiral.rs:242:16
[INFO] [stderr]     |
[INFO] [stderr] 242 |     let body = try!(stmts_from_sexprs(&elems[1..]));
[INFO] [stderr]     |                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/sexpr/to_spiral.rs:251:16
[INFO] [stderr]     |
[INFO] [stderr] 251 |     let cond = try!(expr_from_sexpr(&elems[0]));
[INFO] [stderr]     |                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/sexpr/to_spiral.rs:252:16
[INFO] [stderr]     |
[INFO] [stderr] 252 |     let body = try!(stmts_from_sexprs(&elems[1..]));
[INFO] [stderr]     |                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/sexpr/to_spiral.rs:267:26
[INFO] [stderr]     |
[INFO] [stderr] 267 |           var_binds.push(try!(var_bind_from_sexpr(bind)));
[INFO] [stderr]     |                          ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/sexpr/to_spiral.rs:281:21
[INFO] [stderr]     |
[INFO] [stderr] 281 |           let var = try!(var_from_sexpr(&bind[0]));
[INFO] [stderr]     |                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/sexpr/to_spiral.rs:282:22
[INFO] [stderr]     |
[INFO] [stderr] 282 |           let init = try!(expr_from_sexpr(&bind[1]));
[INFO] [stderr]     |                      ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/sexpr/to_spiral.rs:283:22
[INFO] [stderr]     |
[INFO] [stderr] 283 |           let step = try!(expr_from_sexpr(&bind[2]));
[INFO] [stderr]     |                      ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/sexpr/to_spiral.rs:297:27
[INFO] [stderr]     |
[INFO] [stderr] 297 |           let exit_cond = try!(expr_from_sexpr(&list[0]));
[INFO] [stderr]     |                           ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/sexpr/to_spiral.rs:298:28
[INFO] [stderr]     |
[INFO] [stderr] 298 |           let exit_stmts = try!(stmts_from_sexprs(&list[1..]));
[INFO] [stderr]     |                            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/sexpr/to_spiral.rs:308:21
[INFO] [stderr]     |
[INFO] [stderr] 308 |     let var_binds = try!(var_binds_from_sexpr(&elems[0]));
[INFO] [stderr]     |                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/sexpr/to_spiral.rs:309:35
[INFO] [stderr]     |
[INFO] [stderr] 309 |     let (exit_cond, exit_stmts) = try!(exit_from_sexpr(&elems[1]));
[INFO] [stderr]     |                                   ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/sexpr/to_spiral.rs:310:22
[INFO] [stderr]     |
[INFO] [stderr] 310 |     let body_stmts = try!(stmts_from_sexprs(&elems[2..]));
[INFO] [stderr]     |                      ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/sexpr/to_spiral.rs:318:16
[INFO] [stderr]     |
[INFO] [stderr] 318 |   Ok(Expr::And(try!(exprs_from_sexprs(elems))))
[INFO] [stderr]     |                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/sexpr/to_spiral.rs:322:15
[INFO] [stderr]     |
[INFO] [stderr] 322 |   Ok(Expr::Or(try!(exprs_from_sexprs(elems))))
[INFO] [stderr]     |               ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/sexpr/to_spiral.rs:326:18
[INFO] [stderr]     |
[INFO] [stderr] 326 |   Ok(Expr::Begin(try!(stmts_from_sexprs(elems))))
[INFO] [stderr]     |                  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/sexpr/to_spiral.rs:335:26
[INFO] [stderr]     |
[INFO] [stderr] 335 |           var_binds.push(try!(var_bind_from_sexpr(bind)));
[INFO] [stderr]     |                          ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/sexpr/to_spiral.rs:347:21
[INFO] [stderr]     |
[INFO] [stderr] 347 |           let var = try!(var_from_sexpr(&bind[0]));
[INFO] [stderr]     |                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/sexpr/to_spiral.rs:348:23
[INFO] [stderr]     |
[INFO] [stderr] 348 |           let value = try!(expr_from_sexpr(&bind[1]));
[INFO] [stderr]     |                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/sexpr/to_spiral.rs:359:17
[INFO] [stderr]     |
[INFO] [stderr] 359 |     let binds = try!(var_binds_from_sexpr(&elems[0]));
[INFO] [stderr]     |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/sexpr/to_spiral.rs:360:16
[INFO] [stderr]     |
[INFO] [stderr] 360 |     let body = try!(stmts_from_sexprs(&elems[1..]));
[INFO] [stderr]     |                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/sexpr/to_spiral.rs:369:16
[INFO] [stderr]     |
[INFO] [stderr] 369 |     let args = try!(vars_from_sexpr(&elems[0]));
[INFO] [stderr]     |                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/sexpr/to_spiral.rs:370:17
[INFO] [stderr]     |
[INFO] [stderr] 370 |     let stmts = try!(stmts_from_sexprs(&elems[1..]));
[INFO] [stderr]     |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/sexpr/to_spiral.rs:379:16
[INFO] [stderr]     |
[INFO] [stderr] 379 |     let name = try!(var_from_sexpr(&elems[0]));
[INFO] [stderr]     |                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/sexpr/to_spiral.rs:380:16
[INFO] [stderr]     |
[INFO] [stderr] 380 |     let args = try!(exprs_from_sexprs(&elems[1..]));
[INFO] [stderr]     |                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/sexpr/to_spiral.rs:388:13
[INFO] [stderr]     |
[INFO] [stderr] 388 |   let fun = try!(expr_from_sexpr(head));
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/sexpr/to_spiral.rs:389:14
[INFO] [stderr]     |
[INFO] [stderr] 389 |   let args = try!(exprs_from_sexprs(elems));
[INFO] [stderr]     |              ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/sexpr/to_spiral.rs:395:14
[INFO] [stderr]     |
[INFO] [stderr] 395 |   let args = try!(exprs_from_sexprs(elems));
[INFO] [stderr]     |              ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/sexpr/to_spiral.rs:423:15
[INFO] [stderr]     |
[INFO] [stderr] 423 |     vars.push(try!(var_from_sexpr(var)));
[INFO] [stderr]     |               ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/spiral/to_spine/decls.rs:23:37
[INFO] [stderr]    |
[INFO] [stderr] 23 |       let (stmts_onion, stmt_env) = try!(translate_stmts(st, env, &stmts[..]));
[INFO] [stderr]    |                                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/spiral/to_spine/decls.rs:24:35
[INFO] [stderr]    |
[INFO] [stderr] 24 |       let (next_onion, exports) = try!(translate_decls(st, &stmt_env, &decls[stmts.len()..]));
[INFO] [stderr]    |                                   ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/spiral/to_spine/decls.rs:31:23
[INFO] [stderr]    |
[INFO] [stderr] 31 |             let val = try!(env.lookup_var(var)
[INFO] [stderr]    |                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/spiral/to_spine/decls.rs:37:40
[INFO] [stderr]    |
[INFO] [stderr] 37 |       let (next_onion, next_exports) = try!(translate_decls(st, env, &decls[1..]));
[INFO] [stderr]    |                                        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/spiral/to_spine/exprs.rs:35:18
[INFO] [stderr]    |
[INFO] [stderr] 35 |           }, box try!(translate_expr_tail(st, env, expr, join_cont_name))), 
[INFO] [stderr]    |                  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/spiral/to_spine/exprs.rs:45:29
[INFO] [stderr]    |
[INFO] [stderr] 45 |     let (onion, mut vals) = try!(fold_val);
[INFO] [stderr]    |                             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/spiral/to_spine/exprs.rs:46:34
[INFO] [stderr]    |
[INFO] [stderr] 46 |     let (expr_onion, expr_val) = try!(translate_expr(st, env, expr));
[INFO] [stderr]    |                                  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/spiral/to_spine/exprs.rs:79:26
[INFO] [stderr]    |
[INFO] [stderr] 79 |       let (onion, val) = try!(translate_lambda_expr(st, env, &args[..], &body_stmts[..]));
[INFO] [stderr]    |                          ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/spiral/to_spine/exprs.rs:95:26
[INFO] [stderr]    |
[INFO] [stderr] 95 |       let (onion, val) = try!(translate_double_expr(st, number));
[INFO] [stderr]    |                          ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/spiral/to_spine/exprs.rs:99:26
[INFO] [stderr]    |
[INFO] [stderr] 99 |       let (onion, val) = try!(translate_string_expr(st, txt));
[INFO] [stderr]    |                          ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/spiral/to_spine/exprs.rs:113:32
[INFO] [stderr]     |
[INFO] [stderr] 113 |   let (cond_onion, cond_val) = try!(translate_expr(st, env, cond));
[INFO] [stderr]     |                                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/spiral/to_spine/exprs.rs:119:13
[INFO] [stderr]     |
[INFO] [stderr] 119 |       body: try!(then_branch(st, env, cond_val.clone())),
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/spiral/to_spine/exprs.rs:126:13
[INFO] [stderr]     |
[INFO] [stderr] 126 |       body: try!(else_branch(st, env, cond_val.clone())),
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/spiral/to_spine/exprs.rs:206:13
[INFO] [stderr]     |
[INFO] [stderr] 206 |       body: try!(translate_stmts_tail(st, &inner_env, body_stmts, next_cont.clone())),
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/spiral/to_spine/exprs.rs:213:40
[INFO] [stderr]     |
[INFO] [stderr] 213 |         let (nexts_onion, next_vals) = try!(translate_exprs(st, &inner_env, &nexts[..]));
[INFO] [stderr]     |                                        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/spiral/to_spine/exprs.rs:221:13
[INFO] [stderr]     |
[INFO] [stderr] 221 |       body: try!(translate_stmts_tail(st, &inner_env, exit_stmts, result_cont)),
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/spiral/to_spine/exprs.rs:228:38
[INFO] [stderr]     |
[INFO] [stderr] 228 |         let (cond_onion, cond_val) = try!(translate_expr(st, &inner_env, exit_cond));
[INFO] [stderr]     |                                      ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/spiral/to_spine/exprs.rs:238:34
[INFO] [stderr]     |
[INFO] [stderr] 238 |   let (inits_onion, init_vals) = try!(translate_exprs(st, env, &inits[..]));
[INFO] [stderr]     |                                  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/spiral/to_spine/exprs.rs:286:36
[INFO] [stderr]     |
[INFO] [stderr] 286 |       let (expr_onion, expr_val) = try!(translate_expr(st, env, expr));
[INFO] [stderr]     |                                    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/spiral/to_spine/exprs.rs:288:32
[INFO] [stderr]     |
[INFO] [stderr] 288 |       Ok(expr_onion.subst_term(try!(translate_let_expr_tail(st, &inner_env,
[INFO] [stderr]     |                                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/spiral/to_spine/exprs.rs:299:32
[INFO] [stderr]     |
[INFO] [stderr] 299 |   let (args_onion, arg_vals) = try!(translate_exprs(st, env, &arg_refs[..]));
[INFO] [stderr]     |                                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/spiral/to_spine/exprs.rs:300:30
[INFO] [stderr]     |
[INFO] [stderr] 300 |   let (fun_onion, fun_val) = try!(translate_expr(st, env, fun));
[INFO] [stderr]     |                              ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/spiral/to_spine/exprs.rs:309:17
[INFO] [stderr]     |
[INFO] [stderr] 309 |   let fun_def = try!(translate_fun(st, env, var.clone(), args, body_stmts));
[INFO] [stderr]     |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/spiral/to_spine/exprs.rs:318:32
[INFO] [stderr]     |
[INFO] [stderr] 318 |   let (args_onion, arg_vals) = try!(translate_exprs(st, env, &arg_refs[..]));
[INFO] [stderr]     |                                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/spiral/to_spine/exprs.rs:333:19
[INFO] [stderr]     |
[INFO] [stderr] 333 |   let body_term = try!(translate_stmts_tail(st, &inner_env, body_stmts, ret_cont.clone()));
[INFO] [stderr]     |                   ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/spiral/to_spine/mods.rs:25:22
[INFO] [stderr]    |
[INFO] [stderr] 25 |         let module = try!(mod_loader(&required_name));
[INFO] [stderr]    |                      ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/spiral/to_spine/mods.rs:65:32
[INFO] [stderr]    |
[INFO] [stderr] 65 |         let (onion, exports) = try!(translate_decls(st, &mods_env,
[INFO] [stderr]    |                                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/spiral/to_spine/stmts.rs:17:39
[INFO] [stderr]    |
[INFO] [stderr] 17 |     let ((onion, inner_env), nexts) = try!(translate_stmt_block(st, env, stmts));
[INFO] [stderr]    |                                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/spiral/to_spine/stmts.rs:18:25
[INFO] [stderr]    |
[INFO] [stderr] 18 |     Ok(onion.subst_term(try!(translate_stmts_tail(
[INFO] [stderr]    |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/spiral/to_spine/stmts.rs:29:45
[INFO] [stderr]    |
[INFO] [stderr] 29 |     let ((outer_onion, outer_env), nexts) = try!(translate_stmt_block(st, env, stmts));
[INFO] [stderr]    |                                             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/spiral/to_spine/stmts.rs:30:36
[INFO] [stderr]    |
[INFO] [stderr] 30 |     let (inner_onion, inner_env) = try!(translate_stmts(st, &outer_env, nexts));
[INFO] [stderr]    |                                    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/spiral/to_spine/stmts.rs:49:9
[INFO] [stderr]    |
[INFO] [stderr] 49 |     Ok((try!(translate_fun_stmts(st, env, &fun_defs[..])), &stmts[fun_defs.len()..]))
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/spiral/to_spine/stmts.rs:51:9
[INFO] [stderr]    |
[INFO] [stderr] 51 |     Ok((try!(translate_stmt(st, env, stmts[0].borrow())), &stmts[1..]))
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/spiral/to_spine/stmts.rs:69:21
[INFO] [stderr]    |
[INFO] [stderr] 69 |     spine_defs.push(try!(translate_fun(st, &inner_env, spine_var, 
[INFO] [stderr]    |                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/spiral/to_spine/stmts.rs:83:29
[INFO] [stderr]    |
[INFO] [stderr] 83 |       let (stmt_onion, _) = try!(translate_stmt(st, env, stmt));
[INFO] [stderr]    |                             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/spiral/to_spine/stmts.rs:97:43
[INFO] [stderr]    |
[INFO] [stderr] 97 |         import_env = import_env.bind_vars(try!(translate_import_def(env, import_def)));
[INFO] [stderr]    |                                           ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/spiral/to_spine/stmts.rs:104:36
[INFO] [stderr]     |
[INFO] [stderr] 104 |       let (expr_onion, expr_val) = try!(translate_expr(st, env, expr));
[INFO] [stderr]     |                                    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/spiral/to_spine/stmts.rs:109:37
[INFO] [stderr]     |
[INFO] [stderr] 109 |       let (expr_onion, _expr_val) = try!(translate_expr(st, env, expr));
[INFO] [stderr]     |                                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/spiral/to_spine/stmts.rs:129:10
[INFO] [stderr]     |
[INFO] [stderr] 129 |       Ok(try!(translate_import_def(env, def)).into_iter().map(|(var, val)| {
[INFO] [stderr]     |          ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/spiral/to_spine/stmts.rs:140:18
[INFO] [stderr]     |
[INFO] [stderr] 140 |   let selected = try!(translate_import_def(env, import_def)).into_iter()
[INFO] [stderr]     |                  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/spiral/to_spine/mod.rs:23:21
[INFO] [stderr]    |
[INFO] [stderr] 23 |   let loaded_mods = try!(load_mods(prog, mod_loader));
[INFO] [stderr]    |                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/spiral/to_spine/mod.rs:24:32
[INFO] [stderr]    |
[INFO] [stderr] 24 |   let (mod_onions, mods_env) = try!(translate_mods(&mut st, empty_env, loaded_mods));
[INFO] [stderr]    |                                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/spiral/to_spine/mod.rs:62:19
[INFO] [stderr]    |
[INFO] [stderr] 62 |   let body_term = try!(translate_stmts_tail(&mut st, env,
[INFO] [stderr]    |                   ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/main.rs:54:22
[INFO] [stderr]    |
[INFO] [stderr] 54 |     let mut output = try!(fs::File::create(&output_path));
[INFO] [stderr]    |                      ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/main.rs:55:5
[INFO] [stderr]    |
[INFO] [stderr] 55 |     try!(output.write_all(txt.as_bytes()));
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/main.rs:60:22
[INFO] [stderr]    |
[INFO] [stderr] 60 |     let mut output = try!(fs::File::create(&output_path));
[INFO] [stderr]    |                      ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/main.rs:61:5
[INFO] [stderr]    |
[INFO] [stderr] 61 |     try!(output.write_all(sexpr::pretty_print::pretty_print_sexpr(elem).as_bytes()));
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/main.rs:62:5
[INFO] [stderr]    |
[INFO] [stderr] 62 |     try!(output.write_all(b"\n"));
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/main.rs:74:15
[INFO] [stderr]    |
[INFO] [stderr] 74 |   let sexpr = try!(parse_sexpr(&mut try!(fs::File::open(&args.arg_input))));
[INFO] [stderr]    |               ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/main.rs:74:37
[INFO] [stderr]    |
[INFO] [stderr] 74 |   let sexpr = try!(parse_sexpr(&mut try!(fs::File::open(&args.arg_input))));
[INFO] [stderr]    |                                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/main.rs:79:16
[INFO] [stderr]    |
[INFO] [stderr] 79 |   let spiral = try!(sexpr::to_spiral::prog_from_sexpr(&sexpr));
[INFO] [stderr]    |                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/main.rs:90:23
[INFO] [stderr]    |
[INFO] [stderr] 90 |           let sexpr = try!(parse_sexpr(&mut file));
[INFO] [stderr]    |                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/main.rs:99:15
[INFO] [stderr]    |
[INFO] [stderr] 99 |   let spine = try!(spiral::to_spine::spine_from_spiral(&spiral, &mut mod_loader));
[INFO] [stderr]    |               ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:123:13
[INFO] [stderr]     |
[INFO] [stderr] 123 |   let dir = try!(tempdir::TempDir::new("spiral"));
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:134:3
[INFO] [stderr]     |
[INFO] [stderr] 134 |   try!(try!(fs::File::create(&asm_file)).write_all(gas.as_bytes()));
[INFO] [stderr]     |   ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:134:8
[INFO] [stderr]     |
[INFO] [stderr] 134 |   try!(try!(fs::File::create(&asm_file)).write_all(gas.as_bytes()));
[INFO] [stderr]     |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:137:17
[INFO] [stderr]     |
[INFO] [stderr] 137 |   let gas_out = try!(process::Command::new(&gas_cmd[..])
[INFO] [stderr]     |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:143:5
[INFO] [stderr]     |
[INFO] [stderr] 143 |     try!(Err(format!("Assembler failed:\n{}", String::from_utf8_lossy(&gas_out.stderr))))
[INFO] [stderr]     |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:148:18
[INFO] [stderr]     |
[INFO] [stderr] 148 |   let link_out = try!(process::Command::new(&link_cmd[..])
[INFO] [stderr]     |                  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:156:5
[INFO] [stderr]     |
[INFO] [stderr] 156 |     try!(Err(format!("Linker failed:\n{}", String::from_utf8_lossy(&link_out.stderr))))
[INFO] [stderr]     |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/spiral/to_spine/mods.rs:13:20
[INFO] [stderr]    |
[INFO] [stderr] 13 |   mod_loader: &mut (FnMut(&spiral::ModName) -> Result<spiral::Mod, String>))
[INFO] [stderr]    |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/spiral/to_spine/mods.rs:13:21
[INFO] [stderr]    |
[INFO] [stderr] 13 |   mod_loader: &mut (FnMut(&spiral::ModName) -> Result<spiral::Mod, String>))
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut(&spiral::ModName) -> Result<spiral::Mod, String>`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/spiral/to_spine/mod.rs:15:20
[INFO] [stderr]    |
[INFO] [stderr] 15 |   mod_loader: &mut (FnMut(&spiral::ModName) -> Result<spiral::Mod, String>))
[INFO] [stderr]    |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/spiral/to_spine/mod.rs:15:21
[INFO] [stderr]    |
[INFO] [stderr] 15 |   mod_loader: &mut (FnMut(&spiral::ModName) -> Result<spiral::Mod, String>))
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut(&spiral::ModName) -> Result<spiral::Mod, String>`
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_left': superseded by `trim_start`
[INFO] [stderr]  --> src/sexpr/parse.rs:6:15
[INFO] [stderr]   |
[INFO] [stderr] 6 |       if rest.trim_left().is_empty() { 
[INFO] [stderr]   |               ^^^^^^^^^ help: replace the use of the deprecated item: `trim_start`
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_left': superseded by `trim_start`
[INFO] [stderr]   --> src/sexpr/parse.rs:16:21
[INFO] [stderr]    |
[INFO] [stderr] 16 |   let input = input.trim_left();
[INFO] [stderr]    |                     ^^^^^^^^^ help: replace the use of the deprecated item: `trim_start`
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_left': superseded by `trim_start`
[INFO] [stderr]   --> src/sexpr/parse.rs:17:15
[INFO] [stderr]    |
[INFO] [stderr] 17 |   match input.trim_left().slice_shift_char() {
[INFO] [stderr]    |               ^^^^^^^^^ help: replace the use of the deprecated item: `trim_start`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `slice_shift_char` found for reference `&str` in the current scope
[INFO] [stderr]   --> src/sexpr/parse.rs:17:27
[INFO] [stderr]    |
[INFO] [stderr] 17 |   match input.trim_left().slice_shift_char() {
[INFO] [stderr]    |                           ^^^^^^^^^^^^^^^^ method not found in `&str`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `slice_shift_char` found for reference `&str` in the current scope
[INFO] [stderr]   --> src/sexpr/parse.rs:36:38
[INFO] [stderr]    |
[INFO] [stderr] 36 |   while let Some((ch, rest)) = input.slice_shift_char() {
[INFO] [stderr]    |                                      ^^^^^^^^^^^^^^^^ method not found in `&str`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `slice_shift_char` found for reference `&str` in the current scope
[INFO] [stderr]   --> src/sexpr/parse.rs:63:38
[INFO] [stderr]    |
[INFO] [stderr] 63 |   while let Some((ch, rest)) = input.slice_shift_char() {
[INFO] [stderr]    |                                      ^^^^^^^^^^^^^^^^ method not found in `&str`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `slice_shift_char` found for reference `&'a str` in the current scope
[INFO] [stderr]   --> src/sexpr/parse.rs:80:31
[INFO] [stderr]    |
[INFO] [stderr] 80 |   let mut input = match input.slice_shift_char() {
[INFO] [stderr]    |                               ^^^^^^^^^^^^^^^^ method not found in `&'a str`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `slice_shift_char` found for reference `&str` in the current scope
[INFO] [stderr]   --> src/sexpr/parse.rs:89:26
[INFO] [stderr]    |
[INFO] [stderr] 89 |       '\\' => match rest.slice_shift_char() {
[INFO] [stderr]    |                          ^^^^^^^^^^^^^^^^ method not found in `&str`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `slice_shift_char` found for reference `&'a str` in the current scope
[INFO] [stderr]    --> src/sexpr/parse.rs:107:31
[INFO] [stderr]     |
[INFO] [stderr] 107 |   let mut input = match input.slice_shift_char() {
[INFO] [stderr]     |                               ^^^^^^^^^^^^^^^^ method not found in `&'a str`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `slice_shift_char` found for reference `&'a str` in the current scope
[INFO] [stderr]    --> src/sexpr/parse.rs:137:31
[INFO] [stderr]     |
[INFO] [stderr] 137 |   let mut input = match input.slice_shift_char() {
[INFO] [stderr]     |                               ^^^^^^^^^^^^^^^^ method not found in `&'a str`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 8 previous errors; 125 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0554, E0599.
[INFO] [stderr] For more information about an error, try `rustc --explain E0554`.
[INFO] [stderr] error: could not compile `spiral`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "abd9890449c10b4114fd945ae5c86f62031a78c6221309c6f07b2871aa452003"`
[INFO] running `"docker" "rm" "-f" "abd9890449c10b4114fd945ae5c86f62031a78c6221309c6f07b2871aa452003"`
[INFO] [stdout] abd9890449c10b4114fd945ae5c86f62031a78c6221309c6f07b2871aa452003