[INFO] crate jvm-assembler 0.0.1 is already in cache
[INFO] extracting crate jvm-assembler 0.0.1 into work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/reg/jvm-assembler/0.0.1
[INFO] extracting crate jvm-assembler 0.0.1 into work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/reg/jvm-assembler/0.0.1
[INFO] validating manifest of jvm-assembler-0.0.1 on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of jvm-assembler-0.0.1 on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing jvm-assembler-0.0.1
[INFO] finished frobbing jvm-assembler-0.0.1
[INFO] frobbed toml for jvm-assembler-0.0.1 written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/reg/jvm-assembler/0.0.1/Cargo.toml
[INFO] started frobbing jvm-assembler-0.0.1
[INFO] finished frobbing jvm-assembler-0.0.1
[INFO] frobbed toml for jvm-assembler-0.0.1 written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/reg/jvm-assembler/0.0.1/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking jvm-assembler-0.0.1 against try#266783e4e09e4e9d5307c1c8e695659c58bbcac7 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-6/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/reg/jvm-assembler/0.0.1:/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=forbid" "-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" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 33984a059c8396f23ae8baa1670673627a4c4fd93509d9ca03aff3ed72a4997e
[INFO] running `"docker" "start" "-a" "33984a059c8396f23ae8baa1670673627a4c4fd93509d9ca03aff3ed72a4997e"`
[INFO] [stderr]     Checking jvm-assembler v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/classfile.rs:96:36
[INFO] [stderr]    |
[INFO] [stderr] 96 |     pub fn deserialize(stream: Box<Read>) -> Classfile {
[INFO] [stderr]    |                                    ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/classfile.rs:150:17
[INFO] [stderr]     |
[INFO] [stderr] 150 |     stream: Box<Iterator<Item=u8>>,
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=u8>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/classfile.rs:155:24
[INFO] [stderr]     |
[INFO] [stderr] 155 |     fn new(stream: Box<Iterator<Item=u8>>) -> Deserializer {
[INFO] [stderr]     |                        ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=u8>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/classfile.rs:96:36
[INFO] [stderr]    |
[INFO] [stderr] 96 |     pub fn deserialize(stream: Box<Read>) -> Classfile {
[INFO] [stderr]    |                                    ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/classfile.rs:150:17
[INFO] [stderr]     |
[INFO] [stderr] 150 |     stream: Box<Iterator<Item=u8>>,
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=u8>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/classfile.rs:155:24
[INFO] [stderr]     |
[INFO] [stderr] 155 |     fn new(stream: Box<Iterator<Item=u8>>) -> Deserializer {
[INFO] [stderr]     |                        ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=u8>`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `buf`
[INFO] [stderr]    --> src/classfile.rs:393:24
[INFO] [stderr]     |
[INFO] [stderr] 393 |     fn serialize(self, buf: &mut Vec<u8>) {
[INFO] [stderr]     |                        ^^^ help: consider prefixing with an underscore: `_buf`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `buf`
[INFO] [stderr]    --> src/classfile.rs:397:20
[INFO] [stderr]     |
[INFO] [stderr] 397 |     fn deserialize(buf: &mut Deserializer, classfile: &Classfile) -> Interface {
[INFO] [stderr]     |                    ^^^ help: consider prefixing with an underscore: `_buf`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `classfile`
[INFO] [stderr]    --> src/classfile.rs:397:44
[INFO] [stderr]     |
[INFO] [stderr] 397 |     fn deserialize(buf: &mut Deserializer, classfile: &Classfile) -> Interface {
[INFO] [stderr]     |                                            ^^^^^^^^^ help: consider prefixing with an underscore: `_classfile`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `buf`
[INFO] [stderr]    --> src/classfile.rs:403:24
[INFO] [stderr]     |
[INFO] [stderr] 403 |     fn serialize(self, buf: &mut Vec<u8>) {
[INFO] [stderr]     |                        ^^^ help: consider prefixing with an underscore: `_buf`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `buf`
[INFO] [stderr]    --> src/classfile.rs:407:20
[INFO] [stderr]     |
[INFO] [stderr] 407 |     fn deserialize(buf: &mut Deserializer, classfile: &Classfile) -> Field {
[INFO] [stderr]     |                    ^^^ help: consider prefixing with an underscore: `_buf`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `classfile`
[INFO] [stderr]    --> src/classfile.rs:407:44
[INFO] [stderr]     |
[INFO] [stderr] 407 |     fn deserialize(buf: &mut Deserializer, classfile: &Classfile) -> Field {
[INFO] [stderr]     |                                            ^^^^^^^^^ help: consider prefixing with an underscore: `_classfile`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `buf`
[INFO] [stderr]    --> src/classfile.rs:472:24
[INFO] [stderr]     |
[INFO] [stderr] 472 |     fn serialize(self, buf: &mut Vec<u8>) {
[INFO] [stderr]     |                        ^^^ help: consider prefixing with an underscore: `_buf`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `buf`
[INFO] [stderr]    --> src/classfile.rs:476:20
[INFO] [stderr]     |
[INFO] [stderr] 476 |     fn deserialize(buf: &mut Deserializer, classfile: &Classfile) -> ExceptionTableEntry {
[INFO] [stderr]     |                    ^^^ help: consider prefixing with an underscore: `_buf`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `classfile`
[INFO] [stderr]    --> src/classfile.rs:476:44
[INFO] [stderr]     |
[INFO] [stderr] 476 |     fn deserialize(buf: &mut Deserializer, classfile: &Classfile) -> ExceptionTableEntry {
[INFO] [stderr]     |                                            ^^^^^^^^^ help: consider prefixing with an underscore: `_classfile`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/classfile.rs:97:13
[INFO] [stderr]    |
[INFO] [stderr] 97 |         let mut buf = &mut Deserializer::new(Box::new(stream.bytes().map(|r| r.unwrap())));
[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/classfile.rs:336:13
[INFO] [stderr]     |
[INFO] [stderr] 336 |         let mut code_buf = &mut Deserializer::new(Box::new(code.into_iter()));
[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/classfile.rs:454:13
[INFO] [stderr]     |
[INFO] [stderr] 454 |         let mut buf2 = &mut Deserializer::new(Box::new(attribute_body.into_iter()));
[INFO] [stderr]     |             ----^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `buf`
[INFO] [stderr]    --> src/classfile.rs:393:24
[INFO] [stderr]     |
[INFO] [stderr] 393 |     fn serialize(self, buf: &mut Vec<u8>) {
[INFO] [stderr]     |                        ^^^ help: consider prefixing with an underscore: `_buf`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `buf`
[INFO] [stderr]    --> src/classfile.rs:397:20
[INFO] [stderr]     |
[INFO] [stderr] 397 |     fn deserialize(buf: &mut Deserializer, classfile: &Classfile) -> Interface {
[INFO] [stderr]     |                    ^^^ help: consider prefixing with an underscore: `_buf`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `classfile`
[INFO] [stderr]    --> src/classfile.rs:397:44
[INFO] [stderr]     |
[INFO] [stderr] 397 |     fn deserialize(buf: &mut Deserializer, classfile: &Classfile) -> Interface {
[INFO] [stderr]     |                                            ^^^^^^^^^ help: consider prefixing with an underscore: `_classfile`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `buf`
[INFO] [stderr]    --> src/classfile.rs:403:24
[INFO] [stderr]     |
[INFO] [stderr] 403 |     fn serialize(self, buf: &mut Vec<u8>) {
[INFO] [stderr]     |                        ^^^ help: consider prefixing with an underscore: `_buf`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `buf`
[INFO] [stderr]    --> src/classfile.rs:407:20
[INFO] [stderr]     |
[INFO] [stderr] 407 |     fn deserialize(buf: &mut Deserializer, classfile: &Classfile) -> Field {
[INFO] [stderr]     |                    ^^^ help: consider prefixing with an underscore: `_buf`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `classfile`
[INFO] [stderr]    --> src/classfile.rs:407:44
[INFO] [stderr]     |
[INFO] [stderr] 407 |     fn deserialize(buf: &mut Deserializer, classfile: &Classfile) -> Field {
[INFO] [stderr]     |                                            ^^^^^^^^^ help: consider prefixing with an underscore: `_classfile`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `buf`
[INFO] [stderr]    --> src/classfile.rs:472:24
[INFO] [stderr]     |
[INFO] [stderr] 472 |     fn serialize(self, buf: &mut Vec<u8>) {
[INFO] [stderr]     |                        ^^^ help: consider prefixing with an underscore: `_buf`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `buf`
[INFO] [stderr]    --> src/classfile.rs:476:20
[INFO] [stderr]     |
[INFO] [stderr] 476 |     fn deserialize(buf: &mut Deserializer, classfile: &Classfile) -> ExceptionTableEntry {
[INFO] [stderr]     |                    ^^^ help: consider prefixing with an underscore: `_buf`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `classfile`
[INFO] [stderr]    --> src/classfile.rs:476:44
[INFO] [stderr]     |
[INFO] [stderr] 476 |     fn deserialize(buf: &mut Deserializer, classfile: &Classfile) -> ExceptionTableEntry {
[INFO] [stderr]     |                                            ^^^^^^^^^ help: consider prefixing with an underscore: `_classfile`
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `ACC_PUBLIC`
[INFO] [stderr]  --> src/classfile_builder.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub const ACC_PUBLIC: u16 = 0x1;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `ACC_STATIC`
[INFO] [stderr]  --> src/classfile_builder.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub const ACC_STATIC: u16 = 0x8;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `ClassfileBuilder`
[INFO] [stderr]  --> src/classfile_builder.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub struct ClassfileBuilder {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/classfile_builder.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     pub fn new(access_flags: u16, this_class: &str, super_class: &str) -> ClassfileBuilder {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `define_method`
[INFO] [stderr]   --> src/classfile_builder.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 |     pub fn define_method(&mut self, access_flags: u16, name: &str, descriptor: &str) -> MethodBuilder {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `push_constant`
[INFO] [stderr]   --> src/classfile_builder.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 32 |     fn push_constant(&mut self, constant: Constant) -> u16 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `define_utf8`
[INFO] [stderr]   --> src/classfile_builder.rs:38:5
[INFO] [stderr]    |
[INFO] [stderr] 38 |     fn define_utf8(&mut self, string: &str) -> u16 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `define_class`
[INFO] [stderr]   --> src/classfile_builder.rs:42:5
[INFO] [stderr]    |
[INFO] [stderr] 42 |     fn define_class(&mut self, class: &str) -> u16 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `define_name_and_type`
[INFO] [stderr]   --> src/classfile_builder.rs:47:5
[INFO] [stderr]    |
[INFO] [stderr] 47 |     fn define_name_and_type(&mut self, name: &str, descriptor: &str) -> u16 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `define_fieldref`
[INFO] [stderr]   --> src/classfile_builder.rs:53:5
[INFO] [stderr]    |
[INFO] [stderr] 53 |     fn define_fieldref(&mut self, class: &str, name: &str, descriptor: &str) -> u16 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `define_methodref`
[INFO] [stderr]   --> src/classfile_builder.rs:59:5
[INFO] [stderr]    |
[INFO] [stderr] 59 |     fn define_methodref(&mut self, class: &str, name: &str, descriptor: &str) -> u16 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `done`
[INFO] [stderr]   --> src/classfile_builder.rs:65:5
[INFO] [stderr]    |
[INFO] [stderr] 65 |     pub fn done(self) -> Classfile {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `MethodBuilder`
[INFO] [stderr]   --> src/classfile_builder.rs:70:1
[INFO] [stderr]    |
[INFO] [stderr] 70 | pub struct MethodBuilder<'a> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/classfile_builder.rs:81:5
[INFO] [stderr]    |
[INFO] [stderr] 81 |     fn new(classfile: &'a mut ClassfileBuilder, access_flags: u16, name: &str, descriptor: &str) -> MethodBuilder<'a> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_static`
[INFO] [stderr]   --> src/classfile_builder.rs:95:5
[INFO] [stderr]    |
[INFO] [stderr] 95 |     pub fn get_static(&mut self, class: &str, name: &str, descriptor: &str) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `invoke_virtual`
[INFO] [stderr]    --> src/classfile_builder.rs:101:5
[INFO] [stderr]     |
[INFO] [stderr] 101 |     pub fn invoke_virtual(&mut self, class: &str, name: &str, descriptor: &str) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `bipush`
[INFO] [stderr]    --> src/classfile_builder.rs:107:5
[INFO] [stderr]     |
[INFO] [stderr] 107 |     pub fn bipush(&mut self, value: i8) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `iadd`
[INFO] [stderr]    --> src/classfile_builder.rs:112:5
[INFO] [stderr]     |
[INFO] [stderr] 112 |     pub fn iadd(&mut self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `do_return`
[INFO] [stderr]    --> src/classfile_builder.rs:117:5
[INFO] [stderr]     |
[INFO] [stderr] 117 |     pub fn do_return(&mut self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `increase_stack_depth`
[INFO] [stderr]    --> src/classfile_builder.rs:121:5
[INFO] [stderr]     |
[INFO] [stderr] 121 |     fn increase_stack_depth(&mut self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `decrease_stack_depth`
[INFO] [stderr]    --> src/classfile_builder.rs:128:5
[INFO] [stderr]     |
[INFO] [stderr] 128 |     fn decrease_stack_depth(&mut self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `done`
[INFO] [stderr]    --> src/classfile_builder.rs:132:5
[INFO] [stderr]     |
[INFO] [stderr] 132 |     pub fn done(self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/classfile.rs:598:9
[INFO] [stderr]     |
[INFO] [stderr] 598 |         write!(f, ": ");
[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]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/classfile.rs:97:13
[INFO] [stderr]    |
[INFO] [stderr] 97 |         let mut buf = &mut Deserializer::new(Box::new(stream.bytes().map(|r| r.unwrap())));
[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/classfile.rs:336:13
[INFO] [stderr]     |
[INFO] [stderr] 336 |         let mut code_buf = &mut Deserializer::new(Box::new(code.into_iter()));
[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/classfile.rs:454:13
[INFO] [stderr]     |
[INFO] [stderr] 454 |         let mut buf2 = &mut Deserializer::new(Box::new(attribute_body.into_iter()));
[INFO] [stderr]     |             ----^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `ACC_PUBLIC`
[INFO] [stderr]  --> src/classfile_builder.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub const ACC_PUBLIC: u16 = 0x1;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `ACC_STATIC`
[INFO] [stderr]  --> src/classfile_builder.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub const ACC_STATIC: u16 = 0x8;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `ClassfileBuilder`
[INFO] [stderr]  --> src/classfile_builder.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub struct ClassfileBuilder {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/classfile_builder.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     pub fn new(access_flags: u16, this_class: &str, super_class: &str) -> ClassfileBuilder {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `define_method`
[INFO] [stderr]   --> src/classfile_builder.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 |     pub fn define_method(&mut self, access_flags: u16, name: &str, descriptor: &str) -> MethodBuilder {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `push_constant`
[INFO] [stderr]   --> src/classfile_builder.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 32 |     fn push_constant(&mut self, constant: Constant) -> u16 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `define_utf8`
[INFO] [stderr]   --> src/classfile_builder.rs:38:5
[INFO] [stderr]    |
[INFO] [stderr] 38 |     fn define_utf8(&mut self, string: &str) -> u16 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `define_class`
[INFO] [stderr]   --> src/classfile_builder.rs:42:5
[INFO] [stderr]    |
[INFO] [stderr] 42 |     fn define_class(&mut self, class: &str) -> u16 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `define_name_and_type`
[INFO] [stderr]   --> src/classfile_builder.rs:47:5
[INFO] [stderr]    |
[INFO] [stderr] 47 |     fn define_name_and_type(&mut self, name: &str, descriptor: &str) -> u16 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `define_fieldref`
[INFO] [stderr]   --> src/classfile_builder.rs:53:5
[INFO] [stderr]    |
[INFO] [stderr] 53 |     fn define_fieldref(&mut self, class: &str, name: &str, descriptor: &str) -> u16 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `define_methodref`
[INFO] [stderr]   --> src/classfile_builder.rs:59:5
[INFO] [stderr]    |
[INFO] [stderr] 59 |     fn define_methodref(&mut self, class: &str, name: &str, descriptor: &str) -> u16 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `done`
[INFO] [stderr]   --> src/classfile_builder.rs:65:5
[INFO] [stderr]    |
[INFO] [stderr] 65 |     pub fn done(self) -> Classfile {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `MethodBuilder`
[INFO] [stderr]   --> src/classfile_builder.rs:70:1
[INFO] [stderr]    |
[INFO] [stderr] 70 | pub struct MethodBuilder<'a> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/classfile_builder.rs:81:5
[INFO] [stderr]    |
[INFO] [stderr] 81 |     fn new(classfile: &'a mut ClassfileBuilder, access_flags: u16, name: &str, descriptor: &str) -> MethodBuilder<'a> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_static`
[INFO] [stderr]   --> src/classfile_builder.rs:95:5
[INFO] [stderr]    |
[INFO] [stderr] 95 |     pub fn get_static(&mut self, class: &str, name: &str, descriptor: &str) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `invoke_virtual`
[INFO] [stderr]    --> src/classfile_builder.rs:101:5
[INFO] [stderr]     |
[INFO] [stderr] 101 |     pub fn invoke_virtual(&mut self, class: &str, name: &str, descriptor: &str) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `bipush`
[INFO] [stderr]    --> src/classfile_builder.rs:107:5
[INFO] [stderr]     |
[INFO] [stderr] 107 |     pub fn bipush(&mut self, value: i8) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `iadd`
[INFO] [stderr]    --> src/classfile_builder.rs:112:5
[INFO] [stderr]     |
[INFO] [stderr] 112 |     pub fn iadd(&mut self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `do_return`
[INFO] [stderr]    --> src/classfile_builder.rs:117:5
[INFO] [stderr]     |
[INFO] [stderr] 117 |     pub fn do_return(&mut self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `increase_stack_depth`
[INFO] [stderr]    --> src/classfile_builder.rs:121:5
[INFO] [stderr]     |
[INFO] [stderr] 121 |     fn increase_stack_depth(&mut self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `decrease_stack_depth`
[INFO] [stderr]    --> src/classfile_builder.rs:128:5
[INFO] [stderr]     |
[INFO] [stderr] 128 |     fn decrease_stack_depth(&mut self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `done`
[INFO] [stderr]    --> src/classfile_builder.rs:132:5
[INFO] [stderr]     |
[INFO] [stderr] 132 |     pub fn done(self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/classfile.rs:598:9
[INFO] [stderr]     |
[INFO] [stderr] 598 |         write!(f, ": ");
[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]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.95s
[INFO] running `"docker" "inspect" "33984a059c8396f23ae8baa1670673627a4c4fd93509d9ca03aff3ed72a4997e"`
[INFO] running `"docker" "rm" "-f" "33984a059c8396f23ae8baa1670673627a4c4fd93509d9ca03aff3ed72a4997e"`
[INFO] [stdout] 33984a059c8396f23ae8baa1670673627a4c4fd93509d9ca03aff3ed72a4997e