[INFO] fetching crate mustache 0.9.0...
[INFO] checking mustache-0.9.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate mustache 0.9.0 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate mustache 0.9.0 on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mustache 0.9.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate mustache 0.9.0
[INFO] tweaked toml for crates.io crate mustache 0.9.0 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 23 packages
[INFO] [stderr]       Adding log v0.3.9 (latest: v0.4.21)
[INFO] [stderr]       Adding rand v0.4.6 (latest: v0.8.5)
[INFO] [stderr]       Adding rand_core v0.3.1 (latest: v0.6.4)
[INFO] [stderr]       Adding rand_core v0.4.2 (latest: v0.6.4)
[INFO] [stderr]       Adding rdrand v0.4.0 (latest: v0.8.3)
[INFO] [stderr]       Adding remove_dir_all v0.5.3 (latest: v0.8.2)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: An explicit [[test]] section is specified in Cargo.toml which currently
[INFO] [stderr] disables Cargo from automatically inferring other test targets.
[INFO] [stderr] This inference behavior will change in the Rust 2018 edition and the following
[INFO] [stderr] files will be included as a test target:
[INFO] [stderr] 
[INFO] [stderr] * /workspace/builds/worker-3-tc1/source/tests/builder.rs
[INFO] [stderr] * /workspace/builds/worker-3-tc1/source/tests/macros.rs
[INFO] [stderr] * /workspace/builds/worker-3-tc1/source/tests/template.rs
[INFO] [stderr] 
[INFO] [stderr] This is likely to break cargo build or cargo test as these files may not be
[INFO] [stderr] ready to be compiled as a test target today. You can future-proof yourself
[INFO] [stderr] and disable this warning by adding `autotests = false` to your [package]
[INFO] [stderr] section. You may also move the files to a location where Cargo would not
[INFO] [stderr] automatically infer them to be a target, such as in subfolders.
[INFO] [stderr] 
[INFO] [stderr] For more information on this warning you can consult
[INFO] [stderr] https://github.com/rust-lang/cargo/issues/5330
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0fce3132b85f4ed9d155cb0cee35c384799e66699a38655777931e8eb9224e1e
[INFO] running `Command { std: "docker" "start" "-a" "0fce3132b85f4ed9d155cb0cee35c384799e66699a38655777931e8eb9224e1e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0fce3132b85f4ed9d155cb0cee35c384799e66699a38655777931e8eb9224e1e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0fce3132b85f4ed9d155cb0cee35c384799e66699a38655777931e8eb9224e1e", kill_on_drop: false }`
[INFO] [stdout] 0fce3132b85f4ed9d155cb0cee35c384799e66699a38655777931e8eb9224e1e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 26ed8b619f6d623a6cb6878456633ee8404b38b91dd53170f926fa90ad0bb327
[INFO] running `Command { std: "docker" "start" "-a" "26ed8b619f6d623a6cb6878456633ee8404b38b91dd53170f926fa90ad0bb327", kill_on_drop: false }`
[INFO] [stderr] warning: An explicit [[test]] section is specified in Cargo.toml which currently
[INFO] [stderr] disables Cargo from automatically inferring other test targets.
[INFO] [stderr] This inference behavior will change in the Rust 2018 edition and the following
[INFO] [stderr] files will be included as a test target:
[INFO] [stderr] 
[INFO] [stderr] * /opt/rustwide/workdir/tests/builder.rs
[INFO] [stderr] * /opt/rustwide/workdir/tests/macros.rs
[INFO] [stderr] * /opt/rustwide/workdir/tests/template.rs
[INFO] [stderr] 
[INFO] [stderr] This is likely to break cargo build or cargo test as these files may not be
[INFO] [stderr] ready to be compiled as a test target today. You can future-proof yourself
[INFO] [stderr] and disable this warning by adding `autotests = false` to your [package]
[INFO] [stderr] section. You may also move the files to a location where Cargo would not
[INFO] [stderr] automatically infer them to be a target, such as in subfolders.
[INFO] [stderr] 
[INFO] [stderr] For more information on this warning you can consult
[INFO] [stderr] https://github.com/rust-lang/cargo/issues/5330
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking mustache v0.9.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `ToString` is imported redundantly
[INFO] [stdout]  --> src/builder.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::string::ToString;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:124:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `ToString` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/compiler.rs:54:13
[INFO] [stdout]    |
[INFO] [stdout] 54 |             try!(parser.parse())
[INFO] [stdout]    |             ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/compiler.rs:69:25
[INFO] [stdout]    |
[INFO] [stdout] 69 |                         try!(file.read_to_string(&mut string));
[INFO] [stdout]    |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/compiler.rs:79:53
[INFO] [stdout]    |
[INFO] [stdout] 79 |                         let (tokens, subpartials) = try!(compiler.compile());
[INFO] [stdout]    |                                                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/context.rs:40:34
[INFO] [stdout]    |
[INFO] [stdout] 40 |         let (tokens, partials) = try!(compiler.compile());
[INFO] [stdout]    |                                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/context.rs:53:9
[INFO] [stdout]    |
[INFO] [stdout] 53 |         try!(file.read_to_end(&mut s));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/context.rs:52:24
[INFO] [stdout]    |
[INFO] [stdout] 52 |         let mut file = try!(File::open(&path));
[INFO] [stdout]    |                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde` is imported redundantly
[INFO] [stdout]  --> src/encoder.rs:6:13
[INFO] [stdout]   |
[INFO] [stdout] 6 | use serde::{self, Serialize, ser};
[INFO] [stdout]   |             ^^^^
[INFO] [stdout]   |
[INFO] [stdout]  ::: src/lib.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | extern crate serde;
[INFO] [stdout]   | ------------------- the item `serde` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/encoder.rs:331:23
[INFO] [stdout]     |
[INFO] [stdout] 331 |         self.vec.push(try!(to_data(&value)));
[INFO] [stdout]     |                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/encoder.rs:369:30
[INFO] [stdout]     |
[INFO] [stdout] 369 |         self.map.insert(key, try!(to_data(&value)));
[INFO] [stdout]     |                              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:216:29
[INFO] [stdout]     |
[INFO] [stdout] 216 | ...                   try!(self.add_tag());
[INFO] [stdout]     |                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:227:29
[INFO] [stdout]     |
[INFO] [stdout] 227 | ...                   try!(self.add_tag());
[INFO] [stdout]     |                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:365:9
[INFO] [stdout]     |
[INFO] [stdout] 365 |         try!(deny_blank(&content));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:375:28
[INFO] [stdout]     |
[INFO] [stdout] 375 |                 let name = try!(get_name_or_implicit(name));
[INFO] [stdout]     |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:381:32
[INFO] [stdout]     |
[INFO] [stdout] 381 |                     let name = try!(get_name_or_implicit(name));
[INFO] [stdout]     |                                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:390:28
[INFO] [stdout]     |
[INFO] [stdout] 390 |                 let name = try!(get_name_or_implicit(&content[1..len]));
[INFO] [stdout]     |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:396:28
[INFO] [stdout]     |
[INFO] [stdout] 396 |                 let name = try!(get_name_or_implicit(&content[1..len]));
[INFO] [stdout]     |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:402:28
[INFO] [stdout]     |
[INFO] [stdout] 402 |                 let name = try!(get_name_or_implicit(&content[1..len]));
[INFO] [stdout]     |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:462:17
[INFO] [stdout]     |
[INFO] [stdout] 462 |                 try!(self.add_partial(&content, tag));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:468:29
[INFO] [stdout]     |
[INFO] [stdout] 468 |                     let s = try!(deny_blank(&content[1..len - 1]));
[INFO] [stdout]     |                             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:495:28
[INFO] [stdout]     |
[INFO] [stdout] 495 |                 let name = try!(get_name_or_implicit(&content));
[INFO] [stdout]     |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:533:20
[INFO] [stdout]     |
[INFO] [stdout] 533 |         let name = try!(deny_blank(name));
[INFO] [stdout]     |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:563:16
[INFO] [stdout]     |
[INFO] [stdout] 563 |     let name = try!(deny_blank(&name));
[INFO] [stdout]     |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/template.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 52 |         try!(self.render(&mut output, data));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/template.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |         try!(self.render_data(&mut output, data));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/template.rs:81:13
[INFO] [stdout]    |
[INFO] [stdout] 81 |             try!(self.render_token(wr, stack, token));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:114:9
[INFO] [stdout]     |
[INFO] [stdout] 114 |         try!(wr.write_all(value.as_bytes()));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:126:13
[INFO] [stdout]     |
[INFO] [stdout] 126 |             try!(wr.write_all(self.indent.as_bytes()));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:159:17
[INFO] [stdout]     |
[INFO] [stdout] 159 |                 try!(self.write_tracking_newlines(wr, line));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:156:21
[INFO] [stdout]     |
[INFO] [stdout] 156 |                     try!(self.write_indent(wr));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:169:9
[INFO] [stdout]     |
[INFO] [stdout] 169 |         try!(self.render_utag(&mut bytes, stack, path));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:174:21
[INFO] [stdout]     |
[INFO] [stdout] 174 |                     try!(wr.write_all(b"<"));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:177:21
[INFO] [stdout]     |
[INFO] [stdout] 177 |                     try!(wr.write_all(b">"));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:180:21
[INFO] [stdout]     |
[INFO] [stdout] 180 |                     try!(wr.write_all(b"&"));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:183:21
[INFO] [stdout]     |
[INFO] [stdout] 183 |                     try!(wr.write_all(b"""));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:186:21
[INFO] [stdout]     |
[INFO] [stdout] 186 |                     try!(wr.write_all(b"'"));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:189:21
[INFO] [stdout]     |
[INFO] [stdout] 189 |                     try!(wr.write_all(&[b]));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:201:17
[INFO] [stdout]     |
[INFO] [stdout] 201 |                 try!(self.write_indent(wr));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:213:25
[INFO] [stdout]     |
[INFO] [stdout] 213 |                         try!(self.write_tracking_newlines(wr, value));
[INFO] [stdout]     |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:220:25
[INFO] [stdout]     |
[INFO] [stdout] 220 |                         try!(self.render(wr, stack, &tokens));
[INFO] [stdout]     |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:219:38
[INFO] [stdout]     |
[INFO] [stdout] 219 |                         let tokens = try!(self.render_fun("", "{{", "}}", f));
[INFO] [stdout]     |                                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:267:25
[INFO] [stdout]     |
[INFO] [stdout] 267 |                         try!(self.render(wr, stack, children));
[INFO] [stdout]     |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:273:29
[INFO] [stdout]     |
[INFO] [stdout] 273 | ...                   try!(self.render(wr, stack, children));
[INFO] [stdout]     |                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:280:29
[INFO] [stdout]     |
[INFO] [stdout] 280 | ...                   try!(self.render(wr, stack, children));
[INFO] [stdout]     |                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:286:25
[INFO] [stdout]     |
[INFO] [stdout] 286 |                         try!(self.render(wr, stack, children));
[INFO] [stdout]     |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:292:25
[INFO] [stdout]     |
[INFO] [stdout] 292 |                         try!(self.render(wr, stack, &tokens));
[INFO] [stdout]     |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:291:38
[INFO] [stdout]     |
[INFO] [stdout] 291 |                         let tokens = try!(self.render_fun(src, otag, ctag, f));
[INFO] [stdout]     |                                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:312:17
[INFO] [stdout]     |
[INFO] [stdout] 312 |                 try!(self.render(wr, stack, &tokens));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:334:27
[INFO] [stdout]     |
[INFO] [stdout] 334 |         let (tokens, _) = try!(compiler.compile());
[INFO] [stdout]     |                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/data.rs:11:21
[INFO] [stdout]    |
[INFO] [stdout] 11 |     Fun(RefCell<Box<FnMut(String) -> String + Send>>),
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 11 |     Fun(RefCell<Box<dyn FnMut(String) -> String + Send>>),
[INFO] [stdout]    |                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/template.rs:324:31
[INFO] [stdout]     |
[INFO] [stdout] 324 |                   f: &mut Box<FnMut(String) -> String + Send + 'static>)
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 324 |                   f: &mut Box<dyn FnMut(String) -> String + Send + 'static>)
[INFO] [stdout]     |                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/encoder.rs:39:14
[INFO] [stdout]    |
[INFO] [stdout] 39 |         self.description().fmt(f)
[INFO] [stdout]    |              ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/error.rs:29:14
[INFO] [stdout]    |
[INFO] [stdout] 29 |         self.description().fmt(f)
[INFO] [stdout]    |              ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/error.rs:38:39
[INFO] [stdout]    |
[INFO] [stdout] 38 |             Error::Io(ref err) => err.description(),
[INFO] [stdout]    |                                       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/error.rs:39:43
[INFO] [stdout]    |
[INFO] [stdout] 39 |             Error::Parser(ref err) => err.description(),
[INFO] [stdout]    |                                           ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/error.rs:40:44
[INFO] [stdout]    |
[INFO] [stdout] 40 |             Error::Encoder(ref err) => err.description(),
[INFO] [stdout]    |                                            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/parser.rs:67:39
[INFO] [stdout]    |
[INFO] [stdout] 67 |             _ => write!(f, "{}", self.description()),
[INFO] [stdout]    |                                       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 57 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking tempdir v0.3.7
[INFO] [stdout] warning: the item `ToString` is imported redundantly
[INFO] [stdout]  --> src/builder.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::string::ToString;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:124:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `ToString` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/compiler.rs:54:13
[INFO] [stdout]    |
[INFO] [stdout] 54 |             try!(parser.parse())
[INFO] [stdout]    |             ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/compiler.rs:69:25
[INFO] [stdout]    |
[INFO] [stdout] 69 |                         try!(file.read_to_string(&mut string));
[INFO] [stdout]    |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/compiler.rs:79:53
[INFO] [stdout]    |
[INFO] [stdout] 79 |                         let (tokens, subpartials) = try!(compiler.compile());
[INFO] [stdout]    |                                                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/context.rs:40:34
[INFO] [stdout]    |
[INFO] [stdout] 40 |         let (tokens, partials) = try!(compiler.compile());
[INFO] [stdout]    |                                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/context.rs:53:9
[INFO] [stdout]    |
[INFO] [stdout] 53 |         try!(file.read_to_end(&mut s));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/context.rs:52:24
[INFO] [stdout]    |
[INFO] [stdout] 52 |         let mut file = try!(File::open(&path));
[INFO] [stdout]    |                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde` is imported redundantly
[INFO] [stdout]  --> src/encoder.rs:6:13
[INFO] [stdout]   |
[INFO] [stdout] 6 | use serde::{self, Serialize, ser};
[INFO] [stdout]   |             ^^^^
[INFO] [stdout]   |
[INFO] [stdout]  ::: src/lib.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | extern crate serde;
[INFO] [stdout]   | ------------------- the item `serde` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/encoder.rs:331:23
[INFO] [stdout]     |
[INFO] [stdout] 331 |         self.vec.push(try!(to_data(&value)));
[INFO] [stdout]     |                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/encoder.rs:369:30
[INFO] [stdout]     |
[INFO] [stdout] 369 |         self.map.insert(key, try!(to_data(&value)));
[INFO] [stdout]     |                              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:216:29
[INFO] [stdout]     |
[INFO] [stdout] 216 | ...                   try!(self.add_tag());
[INFO] [stdout]     |                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:227:29
[INFO] [stdout]     |
[INFO] [stdout] 227 | ...                   try!(self.add_tag());
[INFO] [stdout]     |                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:365:9
[INFO] [stdout]     |
[INFO] [stdout] 365 |         try!(deny_blank(&content));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:375:28
[INFO] [stdout]     |
[INFO] [stdout] 375 |                 let name = try!(get_name_or_implicit(name));
[INFO] [stdout]     |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:381:32
[INFO] [stdout]     |
[INFO] [stdout] 381 |                     let name = try!(get_name_or_implicit(name));
[INFO] [stdout]     |                                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:390:28
[INFO] [stdout]     |
[INFO] [stdout] 390 |                 let name = try!(get_name_or_implicit(&content[1..len]));
[INFO] [stdout]     |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:396:28
[INFO] [stdout]     |
[INFO] [stdout] 396 |                 let name = try!(get_name_or_implicit(&content[1..len]));
[INFO] [stdout]     |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:402:28
[INFO] [stdout]     |
[INFO] [stdout] 402 |                 let name = try!(get_name_or_implicit(&content[1..len]));
[INFO] [stdout]     |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:462:17
[INFO] [stdout]     |
[INFO] [stdout] 462 |                 try!(self.add_partial(&content, tag));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:468:29
[INFO] [stdout]     |
[INFO] [stdout] 468 |                     let s = try!(deny_blank(&content[1..len - 1]));
[INFO] [stdout]     |                             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:495:28
[INFO] [stdout]     |
[INFO] [stdout] 495 |                 let name = try!(get_name_or_implicit(&content));
[INFO] [stdout]     |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:533:20
[INFO] [stdout]     |
[INFO] [stdout] 533 |         let name = try!(deny_blank(name));
[INFO] [stdout]     |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:563:16
[INFO] [stdout]     |
[INFO] [stdout] 563 |     let name = try!(deny_blank(&name));
[INFO] [stdout]     |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/template.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 52 |         try!(self.render(&mut output, data));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/template.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |         try!(self.render_data(&mut output, data));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/template.rs:81:13
[INFO] [stdout]    |
[INFO] [stdout] 81 |             try!(self.render_token(wr, stack, token));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:114:9
[INFO] [stdout]     |
[INFO] [stdout] 114 |         try!(wr.write_all(value.as_bytes()));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:126:13
[INFO] [stdout]     |
[INFO] [stdout] 126 |             try!(wr.write_all(self.indent.as_bytes()));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:159:17
[INFO] [stdout]     |
[INFO] [stdout] 159 |                 try!(self.write_tracking_newlines(wr, line));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:156:21
[INFO] [stdout]     |
[INFO] [stdout] 156 |                     try!(self.write_indent(wr));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:169:9
[INFO] [stdout]     |
[INFO] [stdout] 169 |         try!(self.render_utag(&mut bytes, stack, path));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:174:21
[INFO] [stdout]     |
[INFO] [stdout] 174 |                     try!(wr.write_all(b"&lt;"));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:177:21
[INFO] [stdout]     |
[INFO] [stdout] 177 |                     try!(wr.write_all(b"&gt;"));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:180:21
[INFO] [stdout]     |
[INFO] [stdout] 180 |                     try!(wr.write_all(b"&amp;"));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:183:21
[INFO] [stdout]     |
[INFO] [stdout] 183 |                     try!(wr.write_all(b"&quot;"));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:186:21
[INFO] [stdout]     |
[INFO] [stdout] 186 |                     try!(wr.write_all(b"&#39;"));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:189:21
[INFO] [stdout]     |
[INFO] [stdout] 189 |                     try!(wr.write_all(&[b]));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:201:17
[INFO] [stdout]     |
[INFO] [stdout] 201 |                 try!(self.write_indent(wr));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:213:25
[INFO] [stdout]     |
[INFO] [stdout] 213 |                         try!(self.write_tracking_newlines(wr, value));
[INFO] [stdout]     |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:220:25
[INFO] [stdout]     |
[INFO] [stdout] 220 |                         try!(self.render(wr, stack, &tokens));
[INFO] [stdout]     |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:219:38
[INFO] [stdout]     |
[INFO] [stdout] 219 |                         let tokens = try!(self.render_fun("", "{{", "}}", f));
[INFO] [stdout]     |                                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:267:25
[INFO] [stdout]     |
[INFO] [stdout] 267 |                         try!(self.render(wr, stack, children));
[INFO] [stdout]     |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:273:29
[INFO] [stdout]     |
[INFO] [stdout] 273 | ...                   try!(self.render(wr, stack, children));
[INFO] [stdout]     |                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:280:29
[INFO] [stdout]     |
[INFO] [stdout] 280 | ...                   try!(self.render(wr, stack, children));
[INFO] [stdout]     |                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:286:25
[INFO] [stdout]     |
[INFO] [stdout] 286 |                         try!(self.render(wr, stack, children));
[INFO] [stdout]     |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:292:25
[INFO] [stdout]     |
[INFO] [stdout] 292 |                         try!(self.render(wr, stack, &tokens));
[INFO] [stdout]     |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:291:38
[INFO] [stdout]     |
[INFO] [stdout] 291 |                         let tokens = try!(self.render_fun(src, otag, ctag, f));
[INFO] [stdout]     |                                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:312:17
[INFO] [stdout]     |
[INFO] [stdout] 312 |                 try!(self.render(wr, stack, &tokens));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:334:27
[INFO] [stdout]     |
[INFO] [stdout] 334 |         let (tokens, _) = try!(compiler.compile());
[INFO] [stdout]     |                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/data.rs:11:21
[INFO] [stdout]    |
[INFO] [stdout] 11 |     Fun(RefCell<Box<FnMut(String) -> String + Send>>),
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 11 |     Fun(RefCell<Box<dyn FnMut(String) -> String + Send>>),
[INFO] [stdout]    |                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/template.rs:324:31
[INFO] [stdout]     |
[INFO] [stdout] 324 |                   f: &mut Box<FnMut(String) -> String + Send + 'static>)
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 324 |                   f: &mut Box<dyn FnMut(String) -> String + Send + 'static>)
[INFO] [stdout]     |                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `mustache` is imported redundantly
[INFO] [stdout]  --> tests/template.rs:9:16
[INFO] [stdout]   |
[INFO] [stdout] 9 | use mustache::{self, Data, Error, to_data};
[INFO] [stdout]   |                ^^^^
[INFO] [stdout]   |
[INFO] [stdout]  ::: tests/test.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | extern crate mustache;
[INFO] [stdout]   | ---------------------- the item `mustache` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde_json` is imported redundantly
[INFO] [stdout]   --> tests/template.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use serde_json;
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: tests/test.rs:3:1
[INFO] [stdout]    |
[INFO] [stdout] 3  | extern crate serde_json;
[INFO] [stdout]    | ------------------------ the item `serde_json` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> tests/template.rs:55:5
[INFO] [stdout]    |
[INFO] [stdout] 55 |     try!(template.render(&mut bytes, data));
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/encoder.rs:39:14
[INFO] [stdout]    |
[INFO] [stdout] 39 |         self.description().fmt(f)
[INFO] [stdout]    |              ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/error.rs:29:14
[INFO] [stdout]    |
[INFO] [stdout] 29 |         self.description().fmt(f)
[INFO] [stdout]    |              ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/error.rs:38:39
[INFO] [stdout]    |
[INFO] [stdout] 38 |             Error::Io(ref err) => err.description(),
[INFO] [stdout]    |                                       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/error.rs:39:43
[INFO] [stdout]    |
[INFO] [stdout] 39 |             Error::Parser(ref err) => err.description(),
[INFO] [stdout]    |                                           ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/error.rs:40:44
[INFO] [stdout]    |
[INFO] [stdout] 40 |             Error::Encoder(ref err) => err.description(),
[INFO] [stdout]    |                                            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/parser.rs:67:39
[INFO] [stdout]    |
[INFO] [stdout] 67 |             _ => write!(f, "{}", self.description()),
[INFO] [stdout]    |                                       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> tests/template.rs:321:22
[INFO] [stdout]     |
[INFO] [stdout] 321 |         assert_eq!(e.description(), "failed to write whole buffer")
[INFO] [stdout]     |                      ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 57 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.01s
[INFO] running `Command { std: "docker" "inspect" "26ed8b619f6d623a6cb6878456633ee8404b38b91dd53170f926fa90ad0bb327", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "26ed8b619f6d623a6cb6878456633ee8404b38b91dd53170f926fa90ad0bb327", kill_on_drop: false }`
[INFO] [stdout] 26ed8b619f6d623a6cb6878456633ee8404b38b91dd53170f926fa90ad0bb327
[INFO] checking mustache-0.9.0 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate mustache 0.9.0 into /workspace/builds/worker-3-tc2/source
[INFO] validating manifest of crates.io crate mustache 0.9.0 on toolchain 3a4bc97f6385a3aa300a4fd689b44350e54fd676
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mustache 0.9.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate mustache 0.9.0
[INFO] tweaked toml for crates.io crate mustache 0.9.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: An explicit [[test]] section is specified in Cargo.toml which currently
[INFO] [stderr] disables Cargo from automatically inferring other test targets.
[INFO] [stderr] This inference behavior will change in the Rust 2018 edition and the following
[INFO] [stderr] files will be included as a test target:
[INFO] [stderr] 
[INFO] [stderr] * /workspace/builds/worker-3-tc2/source/tests/builder.rs
[INFO] [stderr] * /workspace/builds/worker-3-tc2/source/tests/macros.rs
[INFO] [stderr] * /workspace/builds/worker-3-tc2/source/tests/template.rs
[INFO] [stderr] 
[INFO] [stderr] This is likely to break cargo build or cargo test as these files may not be
[INFO] [stderr] ready to be compiled as a test target today. You can future-proof yourself
[INFO] [stderr] and disable this warning by adding `autotests = false` to your [package]
[INFO] [stderr] section. You may also move the files to a location where Cargo would not
[INFO] [stderr] automatically infer them to be a target, such as in subfolders.
[INFO] [stderr] 
[INFO] [stderr] For more information on this warning you can consult
[INFO] [stderr] https://github.com/rust-lang/cargo/issues/5330
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 75cd4823e746e3518093dcb4128c9d0979ba1194cc1049617c9c04924a517326
[INFO] running `Command { std: "docker" "start" "-a" "75cd4823e746e3518093dcb4128c9d0979ba1194cc1049617c9c04924a517326", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "75cd4823e746e3518093dcb4128c9d0979ba1194cc1049617c9c04924a517326", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "75cd4823e746e3518093dcb4128c9d0979ba1194cc1049617c9c04924a517326", kill_on_drop: false }`
[INFO] [stdout] 75cd4823e746e3518093dcb4128c9d0979ba1194cc1049617c9c04924a517326
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] beedabc0cd28a48e78662e2fc21d981c44df3c35a9e01a28b6fb0de971d01539
[INFO] running `Command { std: "docker" "start" "-a" "beedabc0cd28a48e78662e2fc21d981c44df3c35a9e01a28b6fb0de971d01539", kill_on_drop: false }`
[INFO] [stderr] warning: An explicit [[test]] section is specified in Cargo.toml which currently
[INFO] [stderr] disables Cargo from automatically inferring other test targets.
[INFO] [stderr] This inference behavior will change in the Rust 2018 edition and the following
[INFO] [stderr] files will be included as a test target:
[INFO] [stderr] 
[INFO] [stderr] * /opt/rustwide/workdir/tests/builder.rs
[INFO] [stderr] * /opt/rustwide/workdir/tests/macros.rs
[INFO] [stderr] * /opt/rustwide/workdir/tests/template.rs
[INFO] [stderr] 
[INFO] [stderr] This is likely to break cargo build or cargo test as these files may not be
[INFO] [stderr] ready to be compiled as a test target today. You can future-proof yourself
[INFO] [stderr] and disable this warning by adding `autotests = false` to your [package]
[INFO] [stderr] section. You may also move the files to a location where Cargo would not
[INFO] [stderr] automatically infer them to be a target, such as in subfolders.
[INFO] [stderr] 
[INFO] [stderr] For more information on this warning you can consult
[INFO] [stderr] https://github.com/rust-lang/cargo/issues/5330
[INFO] [stderr]    Compiling serde v1.0.197
[INFO] [stderr]    Compiling serde_json v1.0.115
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]     Checking tempdir v0.3.7
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]     Checking mustache v0.9.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `ToString` is imported redundantly
[INFO] [stdout]  --> src/builder.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::string::ToString;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/3a4bc97f6385a3aa300a4fd689b44350e54fd676/library/std/src/prelude/mod.rs:124:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `ToString` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/compiler.rs:54:13
[INFO] [stdout]    |
[INFO] [stdout] 54 |             try!(parser.parse())
[INFO] [stdout]    |             ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/compiler.rs:69:25
[INFO] [stdout]    |
[INFO] [stdout] 69 |                         try!(file.read_to_string(&mut string));
[INFO] [stdout]    |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/compiler.rs:79:53
[INFO] [stdout]    |
[INFO] [stdout] 79 |                         let (tokens, subpartials) = try!(compiler.compile());
[INFO] [stdout]    |                                                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/context.rs:40:34
[INFO] [stdout]    |
[INFO] [stdout] 40 |         let (tokens, partials) = try!(compiler.compile());
[INFO] [stdout]    |                                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/context.rs:53:9
[INFO] [stdout]    |
[INFO] [stdout] 53 |         try!(file.read_to_end(&mut s));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/context.rs:52:24
[INFO] [stdout]    |
[INFO] [stdout] 52 |         let mut file = try!(File::open(&path));
[INFO] [stdout]    |                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde` is imported redundantly
[INFO] [stdout]  --> src/encoder.rs:6:13
[INFO] [stdout]   |
[INFO] [stdout] 6 | use serde::{self, Serialize, ser};
[INFO] [stdout]   |             ^^^^
[INFO] [stdout]   |
[INFO] [stdout]  ::: src/lib.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | extern crate serde;
[INFO] [stdout]   | ------------------- the item `serde` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/encoder.rs:331:23
[INFO] [stdout]     |
[INFO] [stdout] 331 |         self.vec.push(try!(to_data(&value)));
[INFO] [stdout]     |                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/encoder.rs:369:30
[INFO] [stdout]     |
[INFO] [stdout] 369 |         self.map.insert(key, try!(to_data(&value)));
[INFO] [stdout]     |                              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:216:29
[INFO] [stdout]     |
[INFO] [stdout] 216 | ...                   try!(self.add_tag());
[INFO] [stdout]     |                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:227:29
[INFO] [stdout]     |
[INFO] [stdout] 227 | ...                   try!(self.add_tag());
[INFO] [stdout]     |                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:365:9
[INFO] [stdout]     |
[INFO] [stdout] 365 |         try!(deny_blank(&content));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:375:28
[INFO] [stdout]     |
[INFO] [stdout] 375 |                 let name = try!(get_name_or_implicit(name));
[INFO] [stdout]     |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:381:32
[INFO] [stdout]     |
[INFO] [stdout] 381 |                     let name = try!(get_name_or_implicit(name));
[INFO] [stdout]     |                                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:390:28
[INFO] [stdout]     |
[INFO] [stdout] 390 |                 let name = try!(get_name_or_implicit(&content[1..len]));
[INFO] [stdout]     |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:396:28
[INFO] [stdout]     |
[INFO] [stdout] 396 |                 let name = try!(get_name_or_implicit(&content[1..len]));
[INFO] [stdout]     |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:402:28
[INFO] [stdout]     |
[INFO] [stdout] 402 |                 let name = try!(get_name_or_implicit(&content[1..len]));
[INFO] [stdout]     |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:462:17
[INFO] [stdout]     |
[INFO] [stdout] 462 |                 try!(self.add_partial(&content, tag));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:468:29
[INFO] [stdout]     |
[INFO] [stdout] 468 |                     let s = try!(deny_blank(&content[1..len - 1]));
[INFO] [stdout]     |                             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:495:28
[INFO] [stdout]     |
[INFO] [stdout] 495 |                 let name = try!(get_name_or_implicit(&content));
[INFO] [stdout]     |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:533:20
[INFO] [stdout]     |
[INFO] [stdout] 533 |         let name = try!(deny_blank(name));
[INFO] [stdout]     |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:563:16
[INFO] [stdout]     |
[INFO] [stdout] 563 |     let name = try!(deny_blank(&name));
[INFO] [stdout]     |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/template.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 52 |         try!(self.render(&mut output, data));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/template.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |         try!(self.render_data(&mut output, data));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/template.rs:81:13
[INFO] [stdout]    |
[INFO] [stdout] 81 |             try!(self.render_token(wr, stack, token));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:114:9
[INFO] [stdout]     |
[INFO] [stdout] 114 |         try!(wr.write_all(value.as_bytes()));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:126:13
[INFO] [stdout]     |
[INFO] [stdout] 126 |             try!(wr.write_all(self.indent.as_bytes()));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:159:17
[INFO] [stdout]     |
[INFO] [stdout] 159 |                 try!(self.write_tracking_newlines(wr, line));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:156:21
[INFO] [stdout]     |
[INFO] [stdout] 156 |                     try!(self.write_indent(wr));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:169:9
[INFO] [stdout]     |
[INFO] [stdout] 169 |         try!(self.render_utag(&mut bytes, stack, path));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:174:21
[INFO] [stdout]     |
[INFO] [stdout] 174 |                     try!(wr.write_all(b"&lt;"));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:177:21
[INFO] [stdout]     |
[INFO] [stdout] 177 |                     try!(wr.write_all(b"&gt;"));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:180:21
[INFO] [stdout]     |
[INFO] [stdout] 180 |                     try!(wr.write_all(b"&amp;"));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:183:21
[INFO] [stdout]     |
[INFO] [stdout] 183 |                     try!(wr.write_all(b"&quot;"));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:186:21
[INFO] [stdout]     |
[INFO] [stdout] 186 |                     try!(wr.write_all(b"&#39;"));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:189:21
[INFO] [stdout]     |
[INFO] [stdout] 189 |                     try!(wr.write_all(&[b]));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:201:17
[INFO] [stdout]     |
[INFO] [stdout] 201 |                 try!(self.write_indent(wr));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:213:25
[INFO] [stdout]     |
[INFO] [stdout] 213 |                         try!(self.write_tracking_newlines(wr, value));
[INFO] [stdout]     |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:220:25
[INFO] [stdout]     |
[INFO] [stdout] 220 |                         try!(self.render(wr, stack, &tokens));
[INFO] [stdout]     |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:219:38
[INFO] [stdout]     |
[INFO] [stdout] 219 |                         let tokens = try!(self.render_fun("", "{{", "}}", f));
[INFO] [stdout]     |                                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:267:25
[INFO] [stdout]     |
[INFO] [stdout] 267 |                         try!(self.render(wr, stack, children));
[INFO] [stdout]     |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:273:29
[INFO] [stdout]     |
[INFO] [stdout] 273 | ...                   try!(self.render(wr, stack, children));
[INFO] [stdout]     |                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:280:29
[INFO] [stdout]     |
[INFO] [stdout] 280 | ...                   try!(self.render(wr, stack, children));
[INFO] [stdout]     |                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:286:25
[INFO] [stdout]     |
[INFO] [stdout] 286 |                         try!(self.render(wr, stack, children));
[INFO] [stdout]     |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:292:25
[INFO] [stdout]     |
[INFO] [stdout] 292 |                         try!(self.render(wr, stack, &tokens));
[INFO] [stdout]     |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:291:38
[INFO] [stdout]     |
[INFO] [stdout] 291 |                         let tokens = try!(self.render_fun(src, otag, ctag, f));
[INFO] [stdout]     |                                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:312:17
[INFO] [stdout]     |
[INFO] [stdout] 312 |                 try!(self.render(wr, stack, &tokens));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/template.rs:334:27
[INFO] [stdout]     |
[INFO] [stdout] 334 |         let (tokens, _) = try!(compiler.compile());
[INFO] [stdout]     |                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/data.rs:11:21
[INFO] [stdout]    |
[INFO] [stdout] 11 |     Fun(RefCell<Box<FnMut(String) -> String + Send>>),
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 11 |     Fun(RefCell<Box<dyn FnMut(String) -> String + Send>>),
[INFO] [stdout]    |                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/template.rs:324:31
[INFO] [stdout]     |
[INFO] [stdout] 324 |                   f: &mut Box<FnMut(String) -> String + Send + 'static>)
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 324 |                   f: &mut Box<dyn FnMut(String) -> String + Send + 'static>)
[INFO] [stdout]     |                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/encoder.rs:39:14
[INFO] [stdout]    |
[INFO] [stdout] 39 |         self.description().fmt(f)
[INFO] [stdout]    |              ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/error.rs:29:14
[INFO] [stdout]    |
[INFO] [stdout] 29 |         self.description().fmt(f)
[INFO] [stdout]    |              ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/error.rs:38:39
[INFO] [stdout]    |
[INFO] [stdout] 38 |             Error::Io(ref err) => err.description(),
[INFO] [stdout]    |                                       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/error.rs:39:43
[INFO] [stdout]    |
[INFO] [stdout] 39 |             Error::Parser(ref err) => err.description(),
[INFO] [stdout]    |                                           ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/error.rs:40:44
[INFO] [stdout]    |
[INFO] [stdout] 40 |             Error::Encoder(ref err) => err.description(),
[INFO] [stdout]    |                                            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/parser.rs:67:39
[INFO] [stdout]    |
[INFO] [stdout] 67 |             _ => write!(f, "{}", self.description()),
[INFO] [stdout]    |                                       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> src/macros.rs:7:34
[INFO] [stdout]     |
[INFO] [stdout] 7   |       ($fmt:expr, $($arg:tt)+) => ({
[INFO] [stdout]     |  __________________________________^
[INFO] [stdout] 8   | |         panic!(
[INFO] [stdout] 9   | |             concat!("bug: ",
[INFO] [stdout] 10  | |                     $fmt,
[INFO] [stdout] ...   |
[INFO] [stdout] 14  | |         )
[INFO] [stdout] 15  | |     });
[INFO] [stdout]     | |_____^ cannot infer type
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/template.rs:224:25
[INFO] [stdout]     |
[INFO] [stdout] 224 |                           bug!("render_utag: unexpected value {:?}", value);
[INFO] [stdout]     |                           ------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `bug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error; 57 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mustache` (lib) due to 2 previous errors; 57 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "beedabc0cd28a48e78662e2fc21d981c44df3c35a9e01a28b6fb0de971d01539", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "beedabc0cd28a48e78662e2fc21d981c44df3c35a9e01a28b6fb0de971d01539", kill_on_drop: false }`
[INFO] [stdout] beedabc0cd28a48e78662e2fc21d981c44df3c35a9e01a28b6fb0de971d01539