[INFO] crate flatbuffers-rust 0.1.2 is already in cache
[INFO] extracting crate flatbuffers-rust 0.1.2 into work/ex/beta-1.37-6/sources/1.36.0/reg/flatbuffers-rust/0.1.2
[INFO] extracting crate flatbuffers-rust 0.1.2 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/flatbuffers-rust/0.1.2
[INFO] validating manifest of flatbuffers-rust-0.1.2 on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of flatbuffers-rust-0.1.2 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing flatbuffers-rust-0.1.2
[INFO] finished frobbing flatbuffers-rust-0.1.2
[INFO] frobbed toml for flatbuffers-rust-0.1.2 written to work/ex/beta-1.37-6/sources/1.36.0/reg/flatbuffers-rust/0.1.2/Cargo.toml
[INFO] started frobbing flatbuffers-rust-0.1.2
[INFO] finished frobbing flatbuffers-rust-0.1.2
[INFO] frobbed toml for flatbuffers-rust-0.1.2 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/flatbuffers-rust/0.1.2/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing flatbuffers-rust-0.1.2 against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/flatbuffers-rust/0.1.2:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] d096b9431d6bca104244b10c5438755103e72e560bdbe4f6324c04ac8e8b98d7
[INFO] running `"docker" "start" "-a" "d096b9431d6bca104244b10c5438755103e72e560bdbe4f6324c04ac8e8b98d7"`
[INFO] [stderr]    Compiling flatbuffers-rust v0.1.2 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `pivot`
[INFO] [stderr]   --> src/flatbuffers/flatbuffer.rs:66:18
[INFO] [stderr]    |
[INFO] [stderr] 66 |             Some(pivot) => { bytes.push(SEPARATOR); root = 1;},
[INFO] [stderr]    |                  ^^^^^ help: consider prefixing with an underscore: `_pivot`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]    --> src/flatbuffers/flatbuffer_builder.rs:290:29
[INFO] [stderr]     |
[INFO] [stderr] 290 |                         Err(e) => continue,
[INFO] [stderr]     |                             ^ help: consider prefixing with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/flatbuffers/flatbuffer_builder.rs:341:13
[INFO] [stderr]     |
[INFO] [stderr] 341 |         for i in 0..len {
[INFO] [stderr]     |             ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/flatbuffers/flatbuffer_builder.rs:357:13
[INFO] [stderr]     |
[INFO] [stderr] 357 |         for i in 0..member_num {
[INFO] [stderr]     |             ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `pivot`
[INFO] [stderr]    --> src/flatbuffers/flatbuffer_helper.rs:225:25
[INFO] [stderr]     |
[INFO] [stderr] 225 |             let (bytes, pivot) = match handler.get_part_data(1 + p as usize, root, data) {
[INFO] [stderr]     |                         ^^^^^ help: consider prefixing with an underscore: `_pivot`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `pivot`
[INFO] [stderr]    --> src/flatbuffers/flatbuffer_helper.rs:260:25
[INFO] [stderr]     |
[INFO] [stderr] 260 |             let (bytes, pivot) = match handler.get_part_data(1 + p as usize, root, data) {
[INFO] [stderr]     |                         ^^^^^ help: consider prefixing with an underscore: `_pivot`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `want_vec` is never read
[INFO] [stderr]   --> src/flatbuffers/flatbuffer_handler.rs:21:17
[INFO] [stderr]    |
[INFO] [stderr] 21 |         let mut want_vec = Vec::new();
[INFO] [stderr]    |                 ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `want_root` is never read
[INFO] [stderr]   --> src/flatbuffers/flatbuffer_handler.rs:22:17
[INFO] [stderr]    |
[INFO] [stderr] 22 |         let mut want_root = 0;
[INFO] [stderr]    |                 ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `pivot`
[INFO] [stderr]    --> src/flatbuffers/flatbuffer_handler.rs:100:27
[INFO] [stderr]     |
[INFO] [stderr] 100 |                 let (end, pivot) = self.get_start(part, slot_num, root, data);
[INFO] [stderr]     |                           ^^^^^ help: consider prefixing with an underscore: `_pivot`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `start` is never read
[INFO] [stderr]    --> src/flatbuffers/flatbuffer_handler.rs:131:17
[INFO] [stderr]     |
[INFO] [stderr] 131 |         let mut start = 0;
[INFO] [stderr]     |                 ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `position`
[INFO] [stderr]   --> src/flatbuffers/flatbuffer_manager.rs:51:17
[INFO] [stderr]    |
[INFO] [stderr] 51 |         let mut position = 0;
[INFO] [stderr]    |                 ^^^^^^^^ help: consider prefixing with an underscore: `_position`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `list_str`
[INFO] [stderr]    --> src/flatbuffers/flatbuffer_manager.rs:125:22
[INFO] [stderr]     |
[INFO] [stderr] 125 |                 let (list_str, inner_type) = field_type.split_at(5);
[INFO] [stderr]     |                      ^^^^^^^^ help: consider prefixing with an underscore: `_list_str`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `field_name` is never read
[INFO] [stderr]    --> src/flatbuffers/flatbuffer_manager.rs:147:17
[INFO] [stderr]     |
[INFO] [stderr] 147 |         let mut field_name = "";
[INFO] [stderr]     |                 ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]    --> src/flatbuffers/flatbuffer_manager.rs:163:21
[INFO] [stderr]     |
[INFO] [stderr] 163 |                 Err(e) => break,
[INFO] [stderr]     |                     ^ help: consider prefixing with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `list_str`
[INFO] [stderr]    --> src/flatbuffers/flatbuffer_manager.rs:192:22
[INFO] [stderr]     |
[INFO] [stderr] 192 |                 let (list_str, inner_type) = field_type.split_at(5);
[INFO] [stderr]     |                      ^^^^^^^^ help: consider prefixing with an underscore: `_list_str`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/flatbuffers/flatbuffer_builder.rs:252:17
[INFO] [stderr]     |
[INFO] [stderr] 252 |             let mut field = match message[position] {
[INFO] [stderr]     |                 ----^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/flatbuffers/flatbuffer_builder.rs:273:25
[INFO] [stderr]     |
[INFO] [stderr] 273 |                     let mut message = match child {
[INFO] [stderr]     |                         ----^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/flatbuffers/flatbuffer_builder.rs:296:30
[INFO] [stderr]     |
[INFO] [stderr] 296 |                         Some(mut data) => self.add_flatbuffer_bytes(&mut flatbuffer, position, data, p.unwrap()),
[INFO] [stderr]     |                              ----^^^^
[INFO] [stderr]     |                              |
[INFO] [stderr]     |                              help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/flatbuffers/flatbuffer_builder.rs:364:13
[INFO] [stderr]     |
[INFO] [stderr] 364 |         let mut instance =  InstanceInfo { 
[INFO] [stderr]     |             ----^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/flatbuffers/flatbuffer_helper.rs:47:13
[INFO] [stderr]    |
[INFO] [stderr] 47 |         let mut data_vec = data.into_bytes();
[INFO] [stderr]    |             ----^^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/flatbuffers/flatbuffer_manager.rs:51:13
[INFO] [stderr]    |
[INFO] [stderr] 51 |         let mut position = 0;
[INFO] [stderr]    |             ----^^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/flatbuffers/flatbuffer_manager.rs:81:13
[INFO] [stderr]    |
[INFO] [stderr] 81 |         let mut struct_list = self.struct_list.clone();
[INFO] [stderr]    |             ----^^^^^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/flatbuffers/flatbuffer_manager.rs:212:13
[INFO] [stderr]     |
[INFO] [stderr] 212 |         let mut vec:Vec<&str> = string.as_str().split(".").collect();
[INFO] [stderr]     |             ----^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/flatbuffers/flatbuffer_manager.rs:132:17
[INFO] [stderr]     |
[INFO] [stderr] 132 |                 self.field_position_vec_inner(inner_type_string.as_str(), fields, &mut position_vec);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/flatbuffers/flatbuffer_manager.rs:136:17
[INFO] [stderr]     |
[INFO] [stderr] 136 |                 self.field_position_vec_inner(field_type, fields, &mut position_vec);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/main.rs:10:1
[INFO] [stderr]    |
[INFO] [stderr] 10 | / macro_rules! deser_difftime {
[INFO] [stderr] 11 | |     () => {
[INFO] [stderr] 12 | |     let start = time::now();//获取开始时间
[INFO] [stderr] 13 | |
[INFO] [stderr] ...  |
[INFO] [stderr] 18 | |     };
[INFO] [stderr] 19 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_macros)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/main.rs:21:1
[INFO] [stderr]    |
[INFO] [stderr] 21 | / macro_rules! ser_difftime {
[INFO] [stderr] 22 | |     () => {
[INFO] [stderr] 23 | |     let start = time::now();//获取开始时间
[INFO] [stderr] 24 | |
[INFO] [stderr] ...  |
[INFO] [stderr] 29 | |     };
[INFO] [stderr] 30 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: type `TestMessage_0` should have an upper camel case name
[INFO] [stderr]   --> src/main.rs:33:8
[INFO] [stderr]    |
[INFO] [stderr] 33 | struct TestMessage_0 {
[INFO] [stderr]    |        ^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `TestMessage0`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_camel_case_types)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type `TestMessageChild_0` should have an upper camel case name
[INFO] [stderr]   --> src/main.rs:84:8
[INFO] [stderr]    |
[INFO] [stderr] 84 | struct TestMessageChild_0 {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `TestMessageChild0`
[INFO] [stderr] 
[INFO] [stderr] warning: type `TestMessageChild_1` should have an upper camel case name
[INFO] [stderr]    --> src/main.rs:114:8
[INFO] [stderr]     |
[INFO] [stderr] 114 | struct TestMessageChild_1 {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `TestMessageChild1`
[INFO] [stderr] 
[INFO] [stderr] warning: type `TestMessageChild_2` should have an upper camel case name
[INFO] [stderr]    --> src/main.rs:139:8
[INFO] [stderr]     |
[INFO] [stderr] 139 | struct TestMessageChild_2 {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `TestMessageChild2`
[INFO] [stderr] 
[INFO] [stderr] warning: type `FBTestMessageChild_0` should have an upper camel case name
[INFO] [stderr]    --> src/main.rs:362:16
[INFO] [stderr]     |
[INFO] [stderr] 362 |         struct FBTestMessageChild_0 {
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `FbtestMessageChild0`
[INFO] [stderr] 
[INFO] [stderr] warning: type `FBTestMessageChild_1` should have an upper camel case name
[INFO] [stderr]    --> src/main.rs:372:16
[INFO] [stderr]     |
[INFO] [stderr] 372 |         struct FBTestMessageChild_1 {
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `FbtestMessageChild1`
[INFO] [stderr] 
[INFO] [stderr] warning: type `FBTestMessageChild_2` should have an upper camel case name
[INFO] [stderr]    --> src/main.rs:381:16
[INFO] [stderr]     |
[INFO] [stderr] 381 |         struct FBTestMessageChild_2 {
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `FbtestMessageChild2`
[INFO] [stderr] 
[INFO] [stderr] warning: type `FBTestMessage_0` should have an upper camel case name
[INFO] [stderr]    --> src/main.rs:389:16
[INFO] [stderr]     |
[INFO] [stderr] 389 |         struct FBTestMessage_0 {
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `FbtestMessage0`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/main.rs:174:21
[INFO] [stderr]     |
[INFO] [stderr] 174 |                 for i in 0..len {
[INFO] [stderr]     |                     ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `handler`
[INFO] [stderr]    --> src/main.rs:322:9
[INFO] [stderr]     |
[INFO] [stderr] 322 |     let handler = FlatBufferHandler{};
[INFO] [stderr]     |         ^^^^^^^ help: consider prefixing with an underscore: `_handler`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `handler`
[INFO] [stderr]    --> src/main.rs:340:9
[INFO] [stderr]     |
[INFO] [stderr] 340 |     let handler = FlatBufferHandler{};
[INFO] [stderr]     |         ^^^^^^^ help: consider prefixing with an underscore: `_handler`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `value`
[INFO] [stderr]    --> src/main.rs:575:13
[INFO] [stderr]     |
[INFO] [stderr] 575 |     let mut value = match value_bytes {
[INFO] [stderr]     |             ^^^^^ help: consider prefixing with an underscore: `_value`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `helper`
[INFO] [stderr]    --> src/main.rs:599:9
[INFO] [stderr]     |
[INFO] [stderr] 599 |     let helper = FlatBufferHelper{};
[INFO] [stderr]     |         ^^^^^^ help: consider prefixing with an underscore: `_helper`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:191:9
[INFO] [stderr]     |
[INFO] [stderr] 191 |     let mut field_0 = vec![child_1_0, child_1_1, child_1_2];
[INFO] [stderr]     |         ----^^^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:240:9
[INFO] [stderr]     |
[INFO] [stderr] 240 |     let mut helper = FlatBufferHelper{};
[INFO] [stderr]     |         ----^^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:242:9
[INFO] [stderr]     |
[INFO] [stderr] 242 |     let mut father = father_instance();
[INFO] [stderr]     |         ----^^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:245:9
[INFO] [stderr]     |
[INFO] [stderr] 245 |     let mut field_0 = match father.field_0 {
[INFO] [stderr]     |         ----^^^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:251:21
[INFO] [stderr]     |
[INFO] [stderr] 251 |                 let mut flatbuffer = serialization_child_1(element);
[INFO] [stderr]     |                     ----^^^^^^^^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:264:9
[INFO] [stderr]     |
[INFO] [stderr] 264 |     let mut field_6 = serialization_child_2(field_6_value);
[INFO] [stderr]     |         ----^^^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:270:9
[INFO] [stderr]     |
[INFO] [stderr] 270 |     let mut field_10 = serialization_child_0(field_10_value);
[INFO] [stderr]     |         ----^^^^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:291:9
[INFO] [stderr]     |
[INFO] [stderr] 291 |     let mut helper = FlatBufferHelper{};
[INFO] [stderr]     |         ----^^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:295:9
[INFO] [stderr]     |
[INFO] [stderr] 295 |     let mut field_3 = Some(serialization_child_2(field_3_value).unwrap());
[INFO] [stderr]     |         ----^^^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:325:9
[INFO] [stderr]     |
[INFO] [stderr] 325 |     let mut helper = FlatBufferHelper{};
[INFO] [stderr]     |         ----^^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:449:9
[INFO] [stderr]     |
[INFO] [stderr] 449 |     let mut value = match value_bytes{
[INFO] [stderr]     |         ----^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:575:9
[INFO] [stderr]     |
[INFO] [stderr] 575 |     let mut value = match value_bytes {
[INFO] [stderr]     |         ----^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:587:9
[INFO] [stderr]     |
[INFO] [stderr] 587 |     let mut ser_father = father_instance();
[INFO] [stderr]     |         ----^^^^^^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.10s
[INFO] running `"docker" "inspect" "d096b9431d6bca104244b10c5438755103e72e560bdbe4f6324c04ac8e8b98d7"`
[INFO] running `"docker" "rm" "-f" "d096b9431d6bca104244b10c5438755103e72e560bdbe4f6324c04ac8e8b98d7"`
[INFO] [stdout] d096b9431d6bca104244b10c5438755103e72e560bdbe4f6324c04ac8e8b98d7
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/flatbuffers-rust/0.1.2:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] b6c1c59adc4e98b38275ae4a65004313277d0fc0fd2526a61105a050e3d3b927
[INFO] running `"docker" "start" "-a" "b6c1c59adc4e98b38275ae4a65004313277d0fc0fd2526a61105a050e3d3b927"`
[INFO] [stderr]    Compiling flatbuffers-rust v0.1.2 (/opt/crater/workdir)
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/main.rs:10:1
[INFO] [stderr]    |
[INFO] [stderr] 10 | / macro_rules! deser_difftime {
[INFO] [stderr] 11 | |     () => {
[INFO] [stderr] 12 | |     let start = time::now();//获取开始时间
[INFO] [stderr] 13 | |
[INFO] [stderr] ...  |
[INFO] [stderr] 18 | |     };
[INFO] [stderr] 19 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_macros)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/main.rs:21:1
[INFO] [stderr]    |
[INFO] [stderr] 21 | / macro_rules! ser_difftime {
[INFO] [stderr] 22 | |     () => {
[INFO] [stderr] 23 | |     let start = time::now();//获取开始时间
[INFO] [stderr] 24 | |
[INFO] [stderr] ...  |
[INFO] [stderr] 29 | |     };
[INFO] [stderr] 30 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: type `TestMessage_0` should have an upper camel case name
[INFO] [stderr]   --> src/main.rs:33:8
[INFO] [stderr]    |
[INFO] [stderr] 33 | struct TestMessage_0 {
[INFO] [stderr]    |        ^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `TestMessage0`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_camel_case_types)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type `TestMessageChild_0` should have an upper camel case name
[INFO] [stderr]   --> src/main.rs:84:8
[INFO] [stderr]    |
[INFO] [stderr] 84 | struct TestMessageChild_0 {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `TestMessageChild0`
[INFO] [stderr] 
[INFO] [stderr] warning: type `TestMessageChild_1` should have an upper camel case name
[INFO] [stderr]    --> src/main.rs:114:8
[INFO] [stderr]     |
[INFO] [stderr] 114 | struct TestMessageChild_1 {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `TestMessageChild1`
[INFO] [stderr] 
[INFO] [stderr] warning: type `TestMessageChild_2` should have an upper camel case name
[INFO] [stderr]    --> src/main.rs:139:8
[INFO] [stderr]     |
[INFO] [stderr] 139 | struct TestMessageChild_2 {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `TestMessageChild2`
[INFO] [stderr] 
[INFO] [stderr] warning: type `FBTestMessageChild_0` should have an upper camel case name
[INFO] [stderr]    --> src/main.rs:362:16
[INFO] [stderr]     |
[INFO] [stderr] 362 |         struct FBTestMessageChild_0 {
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `FbtestMessageChild0`
[INFO] [stderr] 
[INFO] [stderr] warning: type `FBTestMessageChild_1` should have an upper camel case name
[INFO] [stderr]    --> src/main.rs:372:16
[INFO] [stderr]     |
[INFO] [stderr] 372 |         struct FBTestMessageChild_1 {
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `FbtestMessageChild1`
[INFO] [stderr] 
[INFO] [stderr] warning: type `FBTestMessageChild_2` should have an upper camel case name
[INFO] [stderr]    --> src/main.rs:381:16
[INFO] [stderr]     |
[INFO] [stderr] 381 |         struct FBTestMessageChild_2 {
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `FbtestMessageChild2`
[INFO] [stderr] 
[INFO] [stderr] warning: type `FBTestMessage_0` should have an upper camel case name
[INFO] [stderr]    --> src/main.rs:389:16
[INFO] [stderr]     |
[INFO] [stderr] 389 |         struct FBTestMessage_0 {
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `FbtestMessage0`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `pivot`
[INFO] [stderr]   --> src/flatbuffers/flatbuffer.rs:66:18
[INFO] [stderr]    |
[INFO] [stderr] 66 |             Some(pivot) => { bytes.push(SEPARATOR); root = 1;},
[INFO] [stderr]    |                  ^^^^^ help: consider prefixing with an underscore: `_pivot`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]    --> src/flatbuffers/flatbuffer_builder.rs:290:29
[INFO] [stderr]     |
[INFO] [stderr] 290 |                         Err(e) => continue,
[INFO] [stderr]     |                             ^ help: consider prefixing with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/flatbuffers/flatbuffer_builder.rs:341:13
[INFO] [stderr]     |
[INFO] [stderr] 341 |         for i in 0..len {
[INFO] [stderr]     |             ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/flatbuffers/flatbuffer_builder.rs:357:13
[INFO] [stderr]     |
[INFO] [stderr] 357 |         for i in 0..member_num {
[INFO] [stderr]     |             ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `pivot`
[INFO] [stderr]    --> src/flatbuffers/flatbuffer_helper.rs:225:25
[INFO] [stderr]     |
[INFO] [stderr] 225 |             let (bytes, pivot) = match handler.get_part_data(1 + p as usize, root, data) {
[INFO] [stderr]     |                         ^^^^^ help: consider prefixing with an underscore: `_pivot`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `pivot`
[INFO] [stderr]    --> src/flatbuffers/flatbuffer_helper.rs:260:25
[INFO] [stderr]     |
[INFO] [stderr] 260 |             let (bytes, pivot) = match handler.get_part_data(1 + p as usize, root, data) {
[INFO] [stderr]     |                         ^^^^^ help: consider prefixing with an underscore: `_pivot`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `want_vec` is never read
[INFO] [stderr]   --> src/flatbuffers/flatbuffer_handler.rs:21:17
[INFO] [stderr]    |
[INFO] [stderr] 21 |         let mut want_vec = Vec::new();
[INFO] [stderr]    |                 ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `want_root` is never read
[INFO] [stderr]   --> src/flatbuffers/flatbuffer_handler.rs:22:17
[INFO] [stderr]    |
[INFO] [stderr] 22 |         let mut want_root = 0;
[INFO] [stderr]    |                 ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `pivot`
[INFO] [stderr]    --> src/flatbuffers/flatbuffer_handler.rs:100:27
[INFO] [stderr]     |
[INFO] [stderr] 100 |                 let (end, pivot) = self.get_start(part, slot_num, root, data);
[INFO] [stderr]     |                           ^^^^^ help: consider prefixing with an underscore: `_pivot`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `start` is never read
[INFO] [stderr]    --> src/flatbuffers/flatbuffer_handler.rs:131:17
[INFO] [stderr]     |
[INFO] [stderr] 131 |         let mut start = 0;
[INFO] [stderr]     |                 ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `position`
[INFO] [stderr]   --> src/flatbuffers/flatbuffer_manager.rs:51:17
[INFO] [stderr]    |
[INFO] [stderr] 51 |         let mut position = 0;
[INFO] [stderr]    |                 ^^^^^^^^ help: consider prefixing with an underscore: `_position`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `list_str`
[INFO] [stderr]    --> src/flatbuffers/flatbuffer_manager.rs:125:22
[INFO] [stderr]     |
[INFO] [stderr] 125 |                 let (list_str, inner_type) = field_type.split_at(5);
[INFO] [stderr]     |                      ^^^^^^^^ help: consider prefixing with an underscore: `_list_str`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `field_name` is never read
[INFO] [stderr]    --> src/flatbuffers/flatbuffer_manager.rs:147:17
[INFO] [stderr]     |
[INFO] [stderr] 147 |         let mut field_name = "";
[INFO] [stderr]     |                 ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]    --> src/flatbuffers/flatbuffer_manager.rs:163:21
[INFO] [stderr]     |
[INFO] [stderr] 163 |                 Err(e) => break,
[INFO] [stderr]     |                     ^ help: consider prefixing with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `list_str`
[INFO] [stderr]    --> src/flatbuffers/flatbuffer_manager.rs:192:22
[INFO] [stderr]     |
[INFO] [stderr] 192 |                 let (list_str, inner_type) = field_type.split_at(5);
[INFO] [stderr]     |                      ^^^^^^^^ help: consider prefixing with an underscore: `_list_str`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/flatbuffers/flatbuffer_builder.rs:252:17
[INFO] [stderr]     |
[INFO] [stderr] 252 |             let mut field = match message[position] {
[INFO] [stderr]     |                 ----^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/flatbuffers/flatbuffer_builder.rs:273:25
[INFO] [stderr]     |
[INFO] [stderr] 273 |                     let mut message = match child {
[INFO] [stderr]     |                         ----^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/flatbuffers/flatbuffer_builder.rs:296:30
[INFO] [stderr]     |
[INFO] [stderr] 296 |                         Some(mut data) => self.add_flatbuffer_bytes(&mut flatbuffer, position, data, p.unwrap()),
[INFO] [stderr]     |                              ----^^^^
[INFO] [stderr]     |                              |
[INFO] [stderr]     |                              help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/flatbuffers/flatbuffer_builder.rs:364:13
[INFO] [stderr]     |
[INFO] [stderr] 364 |         let mut instance =  InstanceInfo { 
[INFO] [stderr]     |             ----^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/flatbuffers/flatbuffer_helper.rs:47:13
[INFO] [stderr]    |
[INFO] [stderr] 47 |         let mut data_vec = data.into_bytes();
[INFO] [stderr]    |             ----^^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/main.rs:174:21
[INFO] [stderr]     |
[INFO] [stderr] 174 |                 for i in 0..len {
[INFO] [stderr]     |                     ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `handler`
[INFO] [stderr]    --> src/main.rs:322:9
[INFO] [stderr]     |
[INFO] [stderr] 322 |     let handler = FlatBufferHandler{};
[INFO] [stderr]     |         ^^^^^^^ help: consider prefixing with an underscore: `_handler`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `handler`
[INFO] [stderr]    --> src/main.rs:340:9
[INFO] [stderr]     |
[INFO] [stderr] 340 |     let handler = FlatBufferHandler{};
[INFO] [stderr]     |         ^^^^^^^ help: consider prefixing with an underscore: `_handler`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `value`
[INFO] [stderr]    --> src/main.rs:575:13
[INFO] [stderr]     |
[INFO] [stderr] 575 |     let mut value = match value_bytes {
[INFO] [stderr]     |             ^^^^^ help: consider prefixing with an underscore: `_value`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `helper`
[INFO] [stderr]    --> src/main.rs:599:9
[INFO] [stderr]     |
[INFO] [stderr] 599 |     let helper = FlatBufferHelper{};
[INFO] [stderr]     |         ^^^^^^ help: consider prefixing with an underscore: `_helper`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/flatbuffers/flatbuffer_manager.rs:51:13
[INFO] [stderr]    |
[INFO] [stderr] 51 |         let mut position = 0;
[INFO] [stderr]    |             ----^^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/flatbuffers/flatbuffer_manager.rs:81:13
[INFO] [stderr]    |
[INFO] [stderr] 81 |         let mut struct_list = self.struct_list.clone();
[INFO] [stderr]    |             ----^^^^^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/flatbuffers/flatbuffer_manager.rs:212:13
[INFO] [stderr]     |
[INFO] [stderr] 212 |         let mut vec:Vec<&str> = string.as_str().split(".").collect();
[INFO] [stderr]     |             ----^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:191:9
[INFO] [stderr]     |
[INFO] [stderr] 191 |     let mut field_0 = vec![child_1_0, child_1_1, child_1_2];
[INFO] [stderr]     |         ----^^^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:240:9
[INFO] [stderr]     |
[INFO] [stderr] 240 |     let mut helper = FlatBufferHelper{};
[INFO] [stderr]     |         ----^^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:242:9
[INFO] [stderr]     |
[INFO] [stderr] 242 |     let mut father = father_instance();
[INFO] [stderr]     |         ----^^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:245:9
[INFO] [stderr]     |
[INFO] [stderr] 245 |     let mut field_0 = match father.field_0 {
[INFO] [stderr]     |         ----^^^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:251:21
[INFO] [stderr]     |
[INFO] [stderr] 251 |                 let mut flatbuffer = serialization_child_1(element);
[INFO] [stderr]     |                     ----^^^^^^^^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:264:9
[INFO] [stderr]     |
[INFO] [stderr] 264 |     let mut field_6 = serialization_child_2(field_6_value);
[INFO] [stderr]     |         ----^^^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:270:9
[INFO] [stderr]     |
[INFO] [stderr] 270 |     let mut field_10 = serialization_child_0(field_10_value);
[INFO] [stderr]     |         ----^^^^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/flatbuffers/flatbuffer_manager.rs:132:17
[INFO] [stderr]     |
[INFO] [stderr] 132 |                 self.field_position_vec_inner(inner_type_string.as_str(), fields, &mut position_vec);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/flatbuffers/flatbuffer_manager.rs:136:17
[INFO] [stderr]     |
[INFO] [stderr] 136 |                 self.field_position_vec_inner(field_type, fields, &mut position_vec);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:291:9
[INFO] [stderr]     |
[INFO] [stderr] 291 |     let mut helper = FlatBufferHelper{};
[INFO] [stderr]     |         ----^^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:295:9
[INFO] [stderr]     |
[INFO] [stderr] 295 |     let mut field_3 = Some(serialization_child_2(field_3_value).unwrap());
[INFO] [stderr]     |         ----^^^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:325:9
[INFO] [stderr]     |
[INFO] [stderr] 325 |     let mut helper = FlatBufferHelper{};
[INFO] [stderr]     |         ----^^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:449:9
[INFO] [stderr]     |
[INFO] [stderr] 449 |     let mut value = match value_bytes{
[INFO] [stderr]     |         ----^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:575:9
[INFO] [stderr]     |
[INFO] [stderr] 575 |     let mut value = match value_bytes {
[INFO] [stderr]     |         ----^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:587:9
[INFO] [stderr]     |
[INFO] [stderr] 587 |     let mut ser_father = father_instance();
[INFO] [stderr]     |         ----^^^^^^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.35s
[INFO] running `"docker" "inspect" "b6c1c59adc4e98b38275ae4a65004313277d0fc0fd2526a61105a050e3d3b927"`
[INFO] running `"docker" "rm" "-f" "b6c1c59adc4e98b38275ae4a65004313277d0fc0fd2526a61105a050e3d3b927"`
[INFO] [stdout] b6c1c59adc4e98b38275ae4a65004313277d0fc0fd2526a61105a050e3d3b927
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/flatbuffers-rust/0.1.2:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] 5f0becda0581280e6ced4bfb80cfaac34bc768279e1eb7878e3a99857f9f0479
[INFO] running `"docker" "start" "-a" "5f0becda0581280e6ced4bfb80cfaac34bc768279e1eb7878e3a99857f9f0479"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/flatbuffers_rust-d19b3073b68153f4
[INFO] [stderr]      Running /opt/crater/target/debug/deps/flatbuffers_rust-fa4ee0f47998daf4
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests flatbuffers-rust
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/flatbuffers/flatbuffer.rs - flatbuffers::flatbuffer::SEPARATOR (line 12) ... FAILED
[INFO] [stdout] test src/flatbuffers/flatbuffer.rs - flatbuffers::flatbuffer::SEPARATOR (line 9) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/flatbuffers/flatbuffer.rs - flatbuffers::flatbuffer::SEPARATOR (line 12) stdout ----
[INFO] [stdout] error: expected one of `!`, `.`, `::`, `;`, `?`, `{`, `}`, or an operator, found `from`
[INFO] [stdout]  --> src/flatbuffers/flatbuffer.rs:13:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | offset from the pivot
[INFO] [stdout]   |        ^^^^ expected one of 8 possible tokens here
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `offset` in this scope
[INFO] [stdout]  --> src/flatbuffers/flatbuffer.rs:13:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | offset from the pivot
[INFO] [stdout]   | ^^^^^^ not found in this scope
[INFO] [stdout] help: possible candidate is found in another module, you can import it into scope
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::intrinsics::offset;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0425`.
[INFO] [stdout] thread 'src/flatbuffers/flatbuffer.rs - flatbuffers::flatbuffer::SEPARATOR (line 12)' panicked at 'couldn't compile the test', src/librustdoc/test.rs:319:13
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x7f13a025b823 - std::sys::unix::backtrace::tracing::imp::unwind_backtrace::h6485381528590a55
[INFO] [stdout]                                at src/libstd/sys/unix/backtrace/tracing/gcc_s.rs:39
[INFO] [stdout]    1:     0x7f13a02534cb - std::sys_common::backtrace::_print::h49a82ae9552e35c7
[INFO] [stdout]                                at src/libstd/sys_common/backtrace.rs:71
[INFO] [stdout]    2:     0x7f13a0257a56 - std::panicking::default_hook::{{closure}}::he20974adbefcc046
[INFO] [stdout]                                at src/libstd/sys_common/backtrace.rs:59
[INFO] [stdout]                                at src/libstd/panicking.rs:197
[INFO] [stdout]    3:     0x7f13a025777e - std::panicking::default_hook::he4af6af4ac7fef7b
[INFO] [stdout]                                at src/libstd/panicking.rs:208
[INFO] [stdout]    4:     0x7f13a025815f - std::panicking::rust_panic_with_hook::h057ff03eb4c8000f
[INFO] [stdout]                                at src/libstd/panicking.rs:474
[INFO] [stdout]    5:     0x55d9f440c784 - std::panicking::begin_panic::h2203228e86eb91b5
[INFO] [stdout]                                at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/libstd/panicking.rs:408
[INFO] [stdout]    6:     0x55d9f440268f - rustdoc::test::run_test::h29a20600da33f74f
[INFO] [stdout]                                at src/librustdoc/test.rs:319
[INFO] [stdout]    7:     0x55d9f43f67c9 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h84ad3bdb52e265e9
[INFO] [stdout]                                at src/librustdoc/test.rs:715
[INFO] [stdout]                                at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/libcore/ops/function.rs:231
[INFO] [stdout]    8:     0x7f13a17deb7e - <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once::h6b004fa8f4fc1608
[INFO] [stdout]                                at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/liballoc/boxed.rs:704
[INFO] [stdout]    9:     0x7f13a17deb7e - <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once::h6b004fa8f4fc1608
[INFO] [stdout]                                at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/liballoc/boxed.rs:704
[INFO] [stdout]   10:     0x7f13a0269169 - __rust_maybe_catch_panic
[INFO] [stdout]                                at src/libpanic_unwind/lib.rs:85
[INFO] [stdout]   11:     0x7f13a17f9f87 - test::run_test::run_test_inner::{{closure}}::h9a4d23c41d058d37
[INFO] [stdout]                                at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/libstd/panicking.rs:272
[INFO] [stdout]                                at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/libstd/panic.rs:394
[INFO] [stdout]                                at src/libtest/lib.rs:1468
[INFO] [stdout]   12:     0x7f13a17d39a4 - std::sys_common::backtrace::__rust_begin_short_backtrace::h3765d76361a33ff7
[INFO] [stdout]                                at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/libstd/sys_common/backtrace.rs:136
[INFO] [stdout]   13:     0x7f13a17d7a54 - std::panicking::try::do_call::h6f86e980b52f74d5
[INFO] [stdout]                                at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/libstd/thread/mod.rs:470
[INFO] [stdout]                                at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/libstd/panic.rs:315
[INFO] [stdout]                                at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/libstd/panicking.rs:293
[INFO] [stdout]   14:     0x7f13a0269169 - __rust_maybe_catch_panic
[INFO] [stdout]                                at src/libpanic_unwind/lib.rs:85
[INFO] [stdout]   15:     0x7f13a17d8551 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h760b8a2b155f54c3
[INFO] [stdout]                                at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/libstd/panicking.rs:272
[INFO] [stdout]                                at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/libstd/panic.rs:394
[INFO] [stdout]                                at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/libstd/thread/mod.rs:469
[INFO] [stdout]                                at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/libcore/ops/function.rs:231
[INFO] [stdout]   16:     0x7f13a023a36e - <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once::h805c3cc89d534c05
[INFO] [stdout]                                at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/liballoc/boxed.rs:704
[INFO] [stdout]   17:     0x7f13a0267ddf - std::sys::unix::thread::Thread::new::thread_start::h6f10b78f26c98dc6
[INFO] [stdout]                                at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/liballoc/boxed.rs:704
[INFO] [stdout]                                at src/libstd/sys_common/thread.rs:13
[INFO] [stdout]                                at src/libstd/sys/unix/thread.rs:79
[INFO] [stdout]   18:     0x7f139fdd14a3 - start_thread
[INFO] [stdout]   19:     0x7f139f8fcd0e - __clone
[INFO] [stdout]   20:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] ---- src/flatbuffers/flatbuffer.rs - flatbuffers::flatbuffer::SEPARATOR (line 9) stdout ----
[INFO] [stdout] error: expected one of `!`, `.`, `::`, `;`, `?`, `{`, `}`, or an operator, found `slot1`
[INFO] [stdout]  --> src/flatbuffers/flatbuffer.rs:10:9
[INFO] [stdout]   |
[INFO] [stdout] 3 | slot0   slot1  slot*
[INFO] [stdout]   |         ^^^^^ expected one of 8 possible tokens here
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `slot0` in this scope
[INFO] [stdout]  --> src/flatbuffers/flatbuffer.rs:10:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | slot0   slot1  slot*
[INFO] [stdout]   | ^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0425`.
[INFO] [stdout] thread 'src/flatbuffers/flatbuffer.rs - flatbuffers::flatbuffer::SEPARATOR (line 9)' panicked at 'couldn't compile the test', src/librustdoc/test.rs:319:13
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x7f13a025b823 - std::sys::unix::backtrace::tracing::imp::unwind_backtrace::h6485381528590a55
[INFO] [stdout]                                at src/libstd/sys/unix/backtrace/tracing/gcc_s.rs:39
[INFO] [stdout]    1:     0x7f13a02534cb - std::sys_common::backtrace::_print::h49a82ae9552e35c7
[INFO] [stdout]                                at src/libstd/sys_common/backtrace.rs:71
[INFO] [stdout]    2:     0x7f13a0257a56 - std::panicking::default_hook::{{closure}}::he20974adbefcc046
[INFO] [stdout]                                at src/libstd/sys_common/backtrace.rs:59
[INFO] [stdout]                                at src/libstd/panicking.rs:197
[INFO] [stdout]    3:     0x7f13a025777e - std::panicking::default_hook::he4af6af4ac7fef7b
[INFO] [stdout]                                at src/libstd/panicking.rs:208
[INFO] [stdout]    4:     0x7f13a025815f - std::panicking::rust_panic_with_hook::h057ff03eb4c8000f
[INFO] [stdout]                                at src/libstd/panicking.rs:474
[INFO] [stdout]    5:     0x55d9f440c784 - std::panicking::begin_panic::h2203228e86eb91b5
[INFO] [stdout]                                at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/libstd/panicking.rs:408
[INFO] [stdout]    6:     0x55d9f440268f - rustdoc::test::run_test::h29a20600da33f74f
[INFO] [stdout]                                at src/librustdoc/test.rs:319
[INFO] [stdout]    7:     0x55d9f43f67c9 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h84ad3bdb52e265e9
[INFO] [stdout]                                at src/librustdoc/test.rs:715
[INFO] [stdout]                                at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/libcore/ops/function.rs:231
[INFO] [stdout]    8:     0x7f13a17deb7e - <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once::h6b004fa8f4fc1608
[INFO] [stdout]                                at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/liballoc/boxed.rs:704
[INFO] [stdout]    9:     0x7f13a17deb7e - <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once::h6b004fa8f4fc1608
[INFO] [stdout]                                at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/liballoc/boxed.rs:704
[INFO] [stdout]   10:     0x7f13a0269169 - __rust_maybe_catch_panic
[INFO] [stdout]                                at src/libpanic_unwind/lib.rs:85
[INFO] [stdout]   11:     0x7f13a17f9f87 - test::run_test::run_test_inner::{{closure}}::h9a4d23c41d058d37
[INFO] [stdout]                                at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/libstd/panicking.rs:272
[INFO] [stdout]                                at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/libstd/panic.rs:394
[INFO] [stdout]                                at src/libtest/lib.rs:1468
[INFO] [stdout]   12:     0x7f13a17d39a4 - std::sys_common::backtrace::__rust_begin_short_backtrace::h3765d76361a33ff7
[INFO] [stdout]                                at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/libstd/sys_common/backtrace.rs:136
[INFO] [stdout]   13:     0x7f13a17d7a54 - std::panicking::try::do_call::h6f86e980b52f74d5
[INFO] [stdout]                                at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/libstd/thread/mod.rs:470
[INFO] [stdout]                                at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/libstd/panic.rs:315
[INFO] [stdout]                                at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/libstd/panicking.rs:293
[INFO] [stdout]   14:     0x7f13a0269169 - __rust_maybe_catch_panic
[INFO] [stdout]                                at src/libpanic_unwind/lib.rs:85
[INFO] [stdout]   15:     0x7f13a17d8551 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h760b8a2b155f54c3
[INFO] [stdout]                                at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/libstd/panicking.rs:272
[INFO] [stdout]                                at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/libstd/panic.rs:394
[INFO] [stdout]                                at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/libstd/thread/mod.rs:469
[INFO] [stdout]                                at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/libcore/ops/function.rs:231
[INFO] [stdout]   16:     0x7f13a023a36e - <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once::h805c3cc89d534c05
[INFO] [stdout]                                at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/liballoc/boxed.rs:704
[INFO] [stdout]   17:     0x7f13a0267ddf - std::sys::unix::thread::Thread::new::thread_start::h6f10b78f26c98dc6
[INFO] [stdout]                                at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/liballoc/boxed.rs:704
[INFO] [stdout]                                at src/libstd/sys_common/thread.rs:13
[INFO] [stdout]                                at src/libstd/sys/unix/thread.rs:79
[INFO] [stdout]   18:     0x7f139fdd14a3 - start_thread
[INFO] [stdout]   19:     0x7f139f8fcd0e - __clone
[INFO] [stdout]   20:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/flatbuffers/flatbuffer.rs - flatbuffers::flatbuffer::SEPARATOR (line 12)
[INFO] [stdout]     src/flatbuffers/flatbuffer.rs - flatbuffers::flatbuffer::SEPARATOR (line 9)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 2 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] running `"docker" "inspect" "5f0becda0581280e6ced4bfb80cfaac34bc768279e1eb7878e3a99857f9f0479"`
[INFO] running `"docker" "rm" "-f" "5f0becda0581280e6ced4bfb80cfaac34bc768279e1eb7878e3a99857f9f0479"`
[INFO] [stdout] 5f0becda0581280e6ced4bfb80cfaac34bc768279e1eb7878e3a99857f9f0479