[INFO] updating cached repository douchuan/jvm2
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/douchuan/jvm2
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/douchuan/jvm2" "work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/douchuan/jvm2"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/douchuan/jvm2'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/douchuan/jvm2" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/douchuan/jvm2"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/douchuan/jvm2'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7e15272c57e5d3d19fd7dea7b6a8f3cfb02d78cb
[INFO] sha for GitHub repo douchuan/jvm2: 7e15272c57e5d3d19fd7dea7b6a8f3cfb02d78cb
[INFO] validating manifest of douchuan/jvm2 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 douchuan/jvm2 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 douchuan/jvm2
[INFO] finished frobbing douchuan/jvm2
[INFO] frobbed toml for douchuan/jvm2 written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/douchuan/jvm2/Cargo.toml
[INFO] started frobbing douchuan/jvm2
[INFO] finished frobbing douchuan/jvm2
[INFO] frobbed toml for douchuan/jvm2 written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/douchuan/jvm2/Cargo.toml
[INFO] crate douchuan/jvm2 already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking douchuan/jvm2 against try#266783e4e09e4e9d5307c1c8e695659c58bbcac7 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-1/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/douchuan/jvm2:/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] 79a270e77c07b84046236e10445bbef327983469b7349b7132d1a1c0094ca4b7
[INFO] running `"docker" "start" "-a" "79a270e77c07b84046236e10445bbef327983469b7349b7132d1a1c0094ca4b7"`
[INFO] [stderr]     Checking env_logger v0.6.1
[INFO] [stderr]     Checking jvm v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `METHOD_NAME_CLINIT`
[INFO] [stderr]  --> src/classfile/constant_pool.rs:4:50
[INFO] [stderr]   |
[INFO] [stderr] 4 | use crate::classfile::consts::{METHOD_NAME_INIT, METHOD_NAME_CLINIT};
[INFO] [stderr]   |                                                  ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `METHOD_NAME_CLINIT`
[INFO] [stderr]  --> src/classfile/constant_pool.rs:4:50
[INFO] [stderr]   |
[INFO] [stderr] 4 | use crate::classfile::consts::{METHOD_NAME_INIT, METHOD_NAME_CLINIT};
[INFO] [stderr]   |                                                  ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `ts`
[INFO] [stderr]    --> src/classfile/signature.rs:174:13
[INFO] [stderr]     |
[INFO] [stderr] 174 |         let ts = vec![
[INFO] [stderr]     |             ^^ help: consider prefixing with an underscore: `_ts`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `ClassAccFlags`
[INFO] [stderr]  --> src/classfile/access_flags.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub enum ClassAccFlags {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `MethodAccFlags`
[INFO] [stderr]   --> src/classfile/access_flags.rs:16:1
[INFO] [stderr]    |
[INFO] [stderr] 16 | pub enum MethodAccFlags {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `FieldAccFlags`
[INFO] [stderr]   --> src/classfile/access_flags.rs:32:1
[INFO] [stderr]    |
[INFO] [stderr] 32 | pub enum FieldAccFlags {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `NestedClassAccessPropertyFlag`
[INFO] [stderr]    --> src/classfile/attr_info.rs:201:1
[INFO] [stderr]     |
[INFO] [stderr] 201 | pub enum NestedClassAccessPropertyFlag {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `MethodParameterAccessFlag`
[INFO] [stderr]    --> src/classfile/attr_info.rs:724:1
[INFO] [stderr]     |
[INFO] [stderr] 724 | pub enum MethodParameterAccessFlag {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `InvalidCpInterfaceMethodRefNameAndTypeIdx`
[INFO] [stderr]   --> src/classfile/checker.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     InvalidCpInterfaceMethodRefNameAndTypeIdx,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `InvalidCpInvokeDynBootstrapMethodAttrIdx`
[INFO] [stderr]   --> src/classfile/checker.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     InvalidCpInvokeDynBootstrapMethodAttrIdx,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `InvalidFieldAccFlags`
[INFO] [stderr]   --> src/classfile/checker.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     InvalidFieldAccFlags,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `InvalidFieldNameIdx`
[INFO] [stderr]   --> src/classfile/checker.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 22 |     InvalidFieldNameIdx,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `InvalidFieldDescIdx`
[INFO] [stderr]   --> src/classfile/checker.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     InvalidFieldDescIdx,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `InvalidMethodAccFlags`
[INFO] [stderr]   --> src/classfile/checker.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     InvalidMethodAccFlags,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `InvalidMethodNameIdx`
[INFO] [stderr]   --> src/classfile/checker.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     InvalidMethodNameIdx,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `InvalidMethodDescIdx`
[INFO] [stderr]   --> src/classfile/checker.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     InvalidMethodDescIdx,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_desc`
[INFO] [stderr]    --> src/classfile/constant_pool.rs:184:5
[INFO] [stderr]     |
[INFO] [stderr] 184 |     pub fn get_desc<'cp>(&self, cp: &'cp ConstantPool) -> Option<&'cp [u8]> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_desc`
[INFO] [stderr]    --> src/classfile/constant_pool.rs:260:5
[INFO] [stderr]     |
[INFO] [stderr] 260 |     pub fn get_desc<'cp>(&self, cp: &'cp ConstantPool) -> Option<&'cp [u8]> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `tag`
[INFO] [stderr]    --> src/classfile/constant_pool.rs:447:5
[INFO] [stderr]     |
[INFO] [stderr] 447 |     tag: u8,
[INFO] [stderr]     |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `METHOD_NAME_CLINIT`
[INFO] [stderr]  --> src/classfile/consts.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub const METHOD_NAME_CLINIT: &str = "<clinit>";
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `FieldSignature`
[INFO] [stderr]   --> src/classfile/signature.rs:40:1
[INFO] [stderr]    |
[INFO] [stderr] 40 | pub struct FieldSignature {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/classfile/signature.rs:45:5
[INFO] [stderr]    |
[INFO] [stderr] 45 |     pub fn new(raw: &[u8]) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_valid_field_name`
[INFO] [stderr]    --> src/classfile/mod.rs:107:1
[INFO] [stderr]     |
[INFO] [stderr] 107 | fn is_valid_field_name() -> bool {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_valid_class_name`
[INFO] [stderr]    --> src/classfile/mod.rs:111:1
[INFO] [stderr]     |
[INFO] [stderr] 111 | fn is_valid_class_name() -> bool {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `ClassAccFlags`
[INFO] [stderr]  --> src/classfile/access_flags.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub enum ClassAccFlags {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `MethodAccFlags`
[INFO] [stderr]   --> src/classfile/access_flags.rs:16:1
[INFO] [stderr]    |
[INFO] [stderr] 16 | pub enum MethodAccFlags {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `FieldAccFlags`
[INFO] [stderr]   --> src/classfile/access_flags.rs:32:1
[INFO] [stderr]    |
[INFO] [stderr] 32 | pub enum FieldAccFlags {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `NestedClassAccessPropertyFlag`
[INFO] [stderr]    --> src/classfile/attr_info.rs:201:1
[INFO] [stderr]     |
[INFO] [stderr] 201 | pub enum NestedClassAccessPropertyFlag {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `MethodParameterAccessFlag`
[INFO] [stderr]    --> src/classfile/attr_info.rs:724:1
[INFO] [stderr]     |
[INFO] [stderr] 724 | pub enum MethodParameterAccessFlag {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `InvalidCpInterfaceMethodRefNameAndTypeIdx`
[INFO] [stderr]   --> src/classfile/checker.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     InvalidCpInterfaceMethodRefNameAndTypeIdx,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `InvalidCpInvokeDynBootstrapMethodAttrIdx`
[INFO] [stderr]   --> src/classfile/checker.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     InvalidCpInvokeDynBootstrapMethodAttrIdx,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `InvalidFieldAccFlags`
[INFO] [stderr]   --> src/classfile/checker.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     InvalidFieldAccFlags,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `InvalidFieldNameIdx`
[INFO] [stderr]   --> src/classfile/checker.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 22 |     InvalidFieldNameIdx,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `InvalidFieldDescIdx`
[INFO] [stderr]   --> src/classfile/checker.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     InvalidFieldDescIdx,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `InvalidMethodAccFlags`
[INFO] [stderr]   --> src/classfile/checker.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     InvalidMethodAccFlags,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `InvalidMethodNameIdx`
[INFO] [stderr]   --> src/classfile/checker.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     InvalidMethodNameIdx,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `InvalidMethodDescIdx`
[INFO] [stderr]   --> src/classfile/checker.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     InvalidMethodDescIdx,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_desc`
[INFO] [stderr]    --> src/classfile/constant_pool.rs:184:5
[INFO] [stderr]     |
[INFO] [stderr] 184 |     pub fn get_desc<'cp>(&self, cp: &'cp ConstantPool) -> Option<&'cp [u8]> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_desc`
[INFO] [stderr]    --> src/classfile/constant_pool.rs:260:5
[INFO] [stderr]     |
[INFO] [stderr] 260 |     pub fn get_desc<'cp>(&self, cp: &'cp ConstantPool) -> Option<&'cp [u8]> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `tag`
[INFO] [stderr]    --> src/classfile/constant_pool.rs:447:5
[INFO] [stderr]     |
[INFO] [stderr] 447 |     tag: u8,
[INFO] [stderr]     |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `METHOD_NAME_CLINIT`
[INFO] [stderr]  --> src/classfile/consts.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub const METHOD_NAME_CLINIT: &str = "<clinit>";
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_valid_field_name`
[INFO] [stderr]    --> src/classfile/mod.rs:107:1
[INFO] [stderr]     |
[INFO] [stderr] 107 | fn is_valid_field_name() -> bool {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_valid_class_name`
[INFO] [stderr]    --> src/classfile/mod.rs:111:1
[INFO] [stderr]     |
[INFO] [stderr] 111 | fn is_valid_class_name() -> bool {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.92s
[INFO] running `"docker" "inspect" "79a270e77c07b84046236e10445bbef327983469b7349b7132d1a1c0094ca4b7"`
[INFO] running `"docker" "rm" "-f" "79a270e77c07b84046236e10445bbef327983469b7349b7132d1a1c0094ca4b7"`
[INFO] [stdout] 79a270e77c07b84046236e10445bbef327983469b7349b7132d1a1c0094ca4b7