Nov 18 00:22:05.139 INFO testing rustep-0.1.2 against master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c for pr-55982
Nov 18 00:22:05.141 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55982/worker-2/master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-55982/master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +6b9b97bd9b704f85f0184f7a213cc4d62bd9654c-alt build --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Nov 18 00:22:05.617 INFO [stdout] 188105e4cfd97b967f798767467fc639a3adba20d76a77622b231b5e40d54b59
Nov 18 00:22:05.620 INFO running `"docker" "start" "-a" "188105e4cfd97b967f798767467fc639a3adba20d76a77622b231b5e40d54b59"`
Nov 18 00:22:07.610 INFO [stderr] usermod: no changes
Nov 18 00:22:08.052 INFO [stderr]    Compiling enumflags v0.3.0
Nov 18 00:22:08.060 INFO [stderr]    Compiling enumflags_derive v0.4.1
Nov 18 00:22:08.061 INFO [stderr]    Compiling num-derive v0.2.3
Nov 18 00:22:21.861 INFO [stderr]    Compiling rustep v0.1.2 (/source)
Nov 18 00:22:23.927 INFO [stderr] warning: unused `#[macro_use]` import
Nov 18 00:22:23.928 INFO [stderr]   --> src/lib.rs:50:1
Nov 18 00:22:23.928 INFO [stderr]    |
Nov 18 00:22:23.928 INFO [stderr] 50 | #[macro_use]
Nov 18 00:22:23.928 INFO [stderr]    | ^^^^^^^^^^^^
Nov 18 00:22:23.928 INFO [stderr]    |
Nov 18 00:22:23.928 INFO [stderr]    = note: #[warn(unused_imports)] on by default
Nov 18 00:22:23.928 INFO [stderr] 
Nov 18 00:22:23.929 INFO [stderr] warning: unused import: `TryInto`
Nov 18 00:22:23.930 INFO [stderr]  --> src/format/elf.rs:9:9
Nov 18 00:22:23.930 INFO [stderr]   |
Nov 18 00:22:23.930 INFO [stderr] 9 |         TryInto,
Nov 18 00:22:23.930 INFO [stderr]   |         ^^^^^^^
Nov 18 00:22:23.930 INFO [stderr] 
Nov 18 00:22:23.930 INFO [stderr] warning: cannot find type `SegmentFlag` in this scope
Nov 18 00:22:23.930 INFO [stderr]   --> src/format/elf.rs:59:10
Nov 18 00:22:23.930 INFO [stderr]    |
Nov 18 00:22:23.931 INFO [stderr] 59 | #[derive(EnumFlags, Copy, Clone, Debug)]
Nov 18 00:22:23.931 INFO [stderr]    |          ^^^^^^^^^ names from parent modules are not accessible without an explicit import
Nov 18 00:22:23.931 INFO [stderr]    |
Nov 18 00:22:23.931 INFO [stderr]    = note: #[warn(proc_macro_derive_resolution_fallback)] on by default
Nov 18 00:22:23.931 INFO [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
Nov 18 00:22:23.931 INFO [stderr]    = note: for more information, see issue #50504 <https://github.com/rust-lang/rust/issues/50504>
Nov 18 00:22:23.931 INFO [stderr] 
Nov 18 00:22:23.931 INFO [stderr] warning: cannot find type `SegmentFlag` in this scope
Nov 18 00:22:23.931 INFO [stderr]   --> src/format/elf.rs:59:10
Nov 18 00:22:23.931 INFO [stderr]    |
Nov 18 00:22:23.931 INFO [stderr] 59 | #[derive(EnumFlags, Copy, Clone, Debug)]
Nov 18 00:22:23.931 INFO [stderr]    |          ^^^^^^^^^ names from parent modules are not accessible without an explicit import
Nov 18 00:22:23.931 INFO [stderr]    |
Nov 18 00:22:23.931 INFO [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
Nov 18 00:22:23.931 INFO [stderr]    = note: for more information, see issue #50504 <https://github.com/rust-lang/rust/issues/50504>
Nov 18 00:22:23.931 INFO [stderr] 
Nov 18 00:22:23.931 INFO [stderr] warning: cannot find type `SectionFlag` in this scope
Nov 18 00:22:23.932 INFO [stderr]    --> src/format/elf.rs:111:10
Nov 18 00:22:23.932 INFO [stderr]     |
Nov 18 00:22:23.932 INFO [stderr] 111 | #[derive(EnumFlags, Copy, Clone, Debug)]
Nov 18 00:22:23.932 INFO [stderr]     |          ^^^^^^^^^ names from parent modules are not accessible without an explicit import
Nov 18 00:22:23.932 INFO [stderr]     |
Nov 18 00:22:23.932 INFO [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
Nov 18 00:22:23.932 INFO [stderr]     = note: for more information, see issue #50504 <https://github.com/rust-lang/rust/issues/50504>
Nov 18 00:22:23.932 INFO [stderr] 
Nov 18 00:22:24.929 INFO [stderr] warning: unreachable pattern
Nov 18 00:22:24.930 INFO [stderr]    --> src/format/elf.rs:789:13
Nov 18 00:22:24.931 INFO [stderr]     |
Nov 18 00:22:24.931 INFO [stderr] 789 |             _ => Err(RustepErrorKind::NotElf)?,
Nov 18 00:22:24.932 INFO [stderr]     |             ^
Nov 18 00:22:24.932 INFO [stderr]     |
Nov 18 00:22:24.932 INFO [stderr]     = note: #[warn(unreachable_patterns)] on by default
Nov 18 00:22:24.932 INFO [stderr] 
Nov 18 00:22:27.652 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 20.01s
Nov 18 00:22:27.666 INFO [stderr] su: No module specific data is present
Nov 18 00:22:28.719 INFO running `"docker" "inspect" "188105e4cfd97b967f798767467fc639a3adba20d76a77622b231b5e40d54b59"`
Nov 18 00:22:29.104 INFO running `"docker" "rm" "-f" "188105e4cfd97b967f798767467fc639a3adba20d76a77622b231b5e40d54b59"`
Nov 18 00:22:29.567 INFO [stdout] 188105e4cfd97b967f798767467fc639a3adba20d76a77622b231b5e40d54b59
Nov 18 00:22:29.571 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55982/worker-2/master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-55982/master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +6b9b97bd9b704f85f0184f7a213cc4d62bd9654c-alt test --frozen --no-run" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Nov 18 00:22:30.163 INFO [stdout] 1512943e92664bf6792150a111feb9bcc00a2acd64de58dcf0d91a33339740c7
Nov 18 00:22:30.165 INFO running `"docker" "start" "-a" "1512943e92664bf6792150a111feb9bcc00a2acd64de58dcf0d91a33339740c7"`
Nov 18 00:22:31.526 INFO [stderr] usermod: no changes
Nov 18 00:22:31.711 INFO [stderr]    Compiling rustep v0.1.2 (/source)
Nov 18 00:22:33.871 INFO [stderr] warning: unused `#[macro_use]` import
Nov 18 00:22:33.872 INFO [stderr]   --> src/lib.rs:50:1
Nov 18 00:22:33.873 INFO [stderr]    |
Nov 18 00:22:33.873 INFO [stderr] 50 | #[macro_use]
Nov 18 00:22:33.873 INFO [stderr]    | ^^^^^^^^^^^^
Nov 18 00:22:33.874 INFO [stderr]    |
Nov 18 00:22:33.874 INFO [stderr]    = note: #[warn(unused_imports)] on by default
Nov 18 00:22:33.874 INFO [stderr] 
Nov 18 00:22:33.891 INFO [stderr] warning: cannot find type `SegmentFlag` in this scope
Nov 18 00:22:33.892 INFO [stderr]   --> src/format/elf.rs:59:10
Nov 18 00:22:33.892 INFO [stderr]    |
Nov 18 00:22:33.892 INFO [stderr] 59 | #[derive(EnumFlags, Copy, Clone, Debug)]
Nov 18 00:22:33.893 INFO [stderr]    |          ^^^^^^^^^ names from parent modules are not accessible without an explicit import
Nov 18 00:22:33.895 INFO [stderr]    |
Nov 18 00:22:33.895 INFO [stderr]    = note: #[warn(proc_macro_derive_resolution_fallback)] on by default
Nov 18 00:22:33.896 INFO [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
Nov 18 00:22:33.896 INFO [stderr]    = note: for more information, see issue #50504 <https://github.com/rust-lang/rust/issues/50504>
Nov 18 00:22:33.896 INFO [stderr] 
Nov 18 00:22:33.896 INFO [stderr] warning: cannot find type `SegmentFlag` in this scope
Nov 18 00:22:33.897 INFO [stderr]   --> src/format/elf.rs:59:10
Nov 18 00:22:33.897 INFO [stderr]    |
Nov 18 00:22:33.897 INFO [stderr] 59 | #[derive(EnumFlags, Copy, Clone, Debug)]
Nov 18 00:22:33.897 INFO [stderr]    |          ^^^^^^^^^ names from parent modules are not accessible without an explicit import
Nov 18 00:22:33.898 INFO [stderr]    |
Nov 18 00:22:33.898 INFO [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
Nov 18 00:22:33.898 INFO [stderr]    = note: for more information, see issue #50504 <https://github.com/rust-lang/rust/issues/50504>
Nov 18 00:22:33.899 INFO [stderr] 
Nov 18 00:22:33.899 INFO [stderr] warning: cannot find type `SectionFlag` in this scope
Nov 18 00:22:33.899 INFO [stderr]    --> src/format/elf.rs:111:10
Nov 18 00:22:33.899 INFO [stderr]     |
Nov 18 00:22:33.900 INFO [stderr] 111 | #[derive(EnumFlags, Copy, Clone, Debug)]
Nov 18 00:22:33.900 INFO [stderr]     |          ^^^^^^^^^ names from parent modules are not accessible without an explicit import
Nov 18 00:22:33.900 INFO [stderr]     |
Nov 18 00:22:33.901 INFO [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
Nov 18 00:22:33.901 INFO [stderr]     = note: for more information, see issue #50504 <https://github.com/rust-lang/rust/issues/50504>
Nov 18 00:22:33.901 INFO [stderr] 
Nov 18 00:22:36.143 INFO [stderr] warning: unreachable pattern
Nov 18 00:22:36.143 INFO [stderr]    --> src/format/elf.rs:789:13
Nov 18 00:22:36.143 INFO [stderr]     |
Nov 18 00:22:36.143 INFO [stderr] 789 |             _ => Err(RustepErrorKind::NotElf)?,
Nov 18 00:22:36.143 INFO [stderr]     |             ^
Nov 18 00:22:36.143 INFO [stderr]     |
Nov 18 00:22:36.143 INFO [stderr]     = note: #[warn(unreachable_patterns)] on by default
Nov 18 00:22:36.143 INFO [stderr] 
Nov 18 00:22:39.362 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.81s
Nov 18 00:22:39.371 INFO [stderr] su: No module specific data is present
Nov 18 00:22:39.884 INFO running `"docker" "inspect" "1512943e92664bf6792150a111feb9bcc00a2acd64de58dcf0d91a33339740c7"`
Nov 18 00:22:40.113 INFO running `"docker" "rm" "-f" "1512943e92664bf6792150a111feb9bcc00a2acd64de58dcf0d91a33339740c7"`
Nov 18 00:22:40.357 INFO [stdout] 1512943e92664bf6792150a111feb9bcc00a2acd64de58dcf0d91a33339740c7
Nov 18 00:22:40.360 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55982/worker-2/master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-55982/master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +6b9b97bd9b704f85f0184f7a213cc4d62bd9654c-alt test --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Nov 18 00:22:40.727 INFO [stdout] 7cb1b11572a0bb57cc2d7efdaa65bcc8f96b92bdfcc5e2c7922a78565c25c40b
Nov 18 00:22:40.729 INFO running `"docker" "start" "-a" "7cb1b11572a0bb57cc2d7efdaa65bcc8f96b92bdfcc5e2c7922a78565c25c40b"`
Nov 18 00:22:41.955 INFO [stderr] usermod: no changes
Nov 18 00:22:42.112 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.13s
Nov 18 00:22:42.120 INFO [stderr]      Running /target/debug/deps/rustep-e1c87dcb08f7378a
Nov 18 00:22:42.123 INFO [stdout] 
Nov 18 00:22:42.123 INFO [stdout] running 55 tests
Nov 18 00:22:42.123 INFO [stdout] test format::bindings::bindgen_test_layout_Elf32_Chdr ... ok
Nov 18 00:22:42.123 INFO [stdout] test format::bindings::bindgen_test_layout_Elf32_Dyn ... ok
Nov 18 00:22:42.123 INFO [stdout] test format::bindings::bindgen_test_layout_Elf32_Dyn__bindgen_ty_1 ... ok
Nov 18 00:22:42.123 INFO [stdout] test format::bindings::bindgen_test_layout_Elf32_RegInfo ... ok
Nov 18 00:22:42.123 INFO [stdout] test format::bindings::bindgen_test_layout_Elf32_Rela ... ok
Nov 18 00:22:42.123 INFO [stdout] test format::bindings::bindgen_test_layout_Elf32_Rel ... ok
Nov 18 00:22:42.123 INFO [stdout] test format::bindings::bindgen_test_layout_Elf32_Lib ... ok
Nov 18 00:22:42.123 INFO [stdout] test format::bindings::bindgen_test_layout_Elf32_Ehdr ... ok
Nov 18 00:22:42.123 INFO [stdout] test format::bindings::bindgen_test_layout_Elf32_Syminfo ... ok
Nov 18 00:22:42.123 INFO [stdout] test format::bindings::bindgen_test_layout_Elf32_Verdaux ... ok
Nov 18 00:22:42.123 INFO [stdout] test format::bindings::bindgen_test_layout_Elf32_Verdef ... ok
Nov 18 00:22:42.123 INFO [stdout] test format::bindings::bindgen_test_layout_Elf32_Vernaux ... ok
Nov 18 00:22:42.123 INFO [stdout] test format::bindings::bindgen_test_layout_Elf32_Shdr ... ok
Nov 18 00:22:42.123 INFO [stdout] test format::bindings::bindgen_test_layout_Elf32_Sym ... ok
Nov 18 00:22:42.123 INFO [stdout] test format::bindings::bindgen_test_layout_Elf32_Phdr ... ok
Nov 18 00:22:42.123 INFO [stdout] test format::bindings::bindgen_test_layout_Elf32_Verneed ... ok
Nov 18 00:22:42.123 INFO [stdout] test format::bindings::bindgen_test_layout_Elf32_gptab__bindgen_ty_2 ... ok
Nov 18 00:22:42.123 INFO [stdout] test format::bindings::bindgen_test_layout_Elf64_Chdr ... ok
Nov 18 00:22:42.123 INFO [stdout] test format::bindings::bindgen_test_layout_Elf64_Dyn ... ok
Nov 18 00:22:42.123 INFO [stdout] test format::bindings::bindgen_test_layout_Elf64_Dyn__bindgen_ty_1 ... ok
Nov 18 00:22:42.123 INFO [stdout] test format::bindings::bindgen_test_layout_Elf64_Ehdr ... ok
Nov 18 00:22:42.123 INFO [stdout] test format::bindings::bindgen_test_layout_Elf64_Lib ... ok
Nov 18 00:22:42.123 INFO [stdout] test format::bindings::bindgen_test_layout_Elf64_Move ... ok
Nov 18 00:22:42.123 INFO [stdout] test format::bindings::bindgen_test_layout_Elf32_Move ... ok
Nov 18 00:22:42.123 INFO [stdout] test format::bindings::bindgen_test_layout_Elf64_Nhdr ... ok
Nov 18 00:22:42.123 INFO [stdout] test format::bindings::bindgen_test_layout_Elf64_Rel ... ok
Nov 18 00:22:42.123 INFO [stdout] test format::bindings::bindgen_test_layout_Elf32_Nhdr ... ok
Nov 18 00:22:42.123 INFO [stdout] test format::bindings::bindgen_test_layout_Elf32_auxv_t__bindgen_ty_1 ... ok
Nov 18 00:22:42.123 INFO [stdout] test format::bindings::bindgen_test_layout_Elf32_gptab ... ok
Nov 18 00:22:42.127 INFO [stdout] test format::bindings::bindgen_test_layout_Elf32_auxv_t ... ok
Nov 18 00:22:42.127 INFO [stdout] test format::bindings::bindgen_test_layout_Elf64_Sym ... ok
Nov 18 00:22:42.127 INFO [stdout] test format::bindings::bindgen_test_layout_Elf64_Syminfo ... ok
Nov 18 00:22:42.127 INFO [stdout] test format::bindings::bindgen_test_layout_Elf64_Verdaux ... ok
Nov 18 00:22:42.127 INFO [stdout] test format::bindings::bindgen_test_layout_Elf32_gptab__bindgen_ty_1 ... ok
Nov 18 00:22:42.127 INFO [stdout] test format::bindings::bindgen_test_layout_Elf64_Phdr ... ok
Nov 18 00:22:42.139 INFO [stdout] test format::bindings::bindgen_test_layout_Elf64_Shdr ... ok
Nov 18 00:22:42.139 INFO [stdout] test format::bindings::bindgen_test_layout_Elf64_auxv_t ... ok
Nov 18 00:22:42.139 INFO [stdout] test format::bindings::bindgen_test_layout_Elf64_auxv_t__bindgen_ty_1 ... ok
Nov 18 00:22:42.139 INFO [stdout] test format::bindings::bindgen_test_layout_Elf64_Rela ... ok
Nov 18 00:22:42.139 INFO [stdout] test format::bindings::bindgen_test_layout_Elf64_Verdef ... ok
Nov 18 00:22:42.139 INFO [stdout] test format::bindings::bindgen_test_layout_Elf64_Vernaux ... ok
Nov 18 00:22:42.139 INFO [stdout] test format::bindings::bindgen_test_layout_Elf64_Verneed ... ok
Nov 18 00:22:42.139 INFO [stdout] test format::bindings::bindgen_test_layout_Elf_Options ... ok
Nov 18 00:22:42.139 INFO [stdout] test format::bindings::bindgen_test_layout_Elf_Options_Hw ... ok
Nov 18 00:22:42.139 INFO [stdout] test format::bindings::bindgen_test_layout___fsid_t ... ok
Nov 18 00:22:42.139 INFO [stdout] test format::bindings::bindgen_test_layout_Elf_MIPS_ABIFlags_v0 ... ok
Nov 18 00:22:42.143 INFO [stdout] test format::elf::test_parse_elf_class ... ok
Nov 18 00:22:42.143 INFO [stderr]    Doc-tests rustep
Nov 18 00:22:42.143 INFO [stdout] test format::elf::test_parse_elf_header32 ... ok
Nov 18 00:22:42.143 INFO [stdout] test format::elf::test_parse_elf ... ok
Nov 18 00:22:42.143 INFO [stdout] test format::elf::test_parse_elf64 ... ok
Nov 18 00:22:42.143 INFO [stdout] test format::elf::test_parse_elf32 ... ok
Nov 18 00:22:42.143 INFO [stdout] test tests::it_works ... ok
Nov 18 00:22:42.143 INFO [stdout] test format::elf::test_parse_elf_header64 ... ok
Nov 18 00:22:42.143 INFO [stdout] test format::elf::test_parse_elf_wrong_class ... ok
Nov 18 00:22:42.143 INFO [stdout] test format::executable::test_executable ... ok
Nov 18 00:22:42.143 INFO [stdout] 
Nov 18 00:22:42.143 INFO [stdout] test result: ok. 55 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Nov 18 00:22:42.143 INFO [stdout] 
Nov 18 00:22:44.695 INFO [stdout] 
Nov 18 00:22:44.695 INFO [stdout] running 2 tests
Nov 18 00:22:49.231 INFO [stdout] test src/format/executable.rs - format::executable::Executable<'a>::from_u8_array (line 37) ... ok
Nov 18 00:22:49.338 INFO [stdout] test src/lib.rs -  (line 9) ... ok
Nov 18 00:22:49.338 INFO [stdout] 
Nov 18 00:22:49.338 INFO [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Nov 18 00:22:49.338 INFO [stdout] 
Nov 18 00:22:49.378 INFO [stderr] su: No module specific data is present
Nov 18 00:22:50.211 INFO running `"docker" "inspect" "7cb1b11572a0bb57cc2d7efdaa65bcc8f96b92bdfcc5e2c7922a78565c25c40b"`
Nov 18 00:22:50.441 INFO running `"docker" "rm" "-f" "7cb1b11572a0bb57cc2d7efdaa65bcc8f96b92bdfcc5e2c7922a78565c25c40b"`
Nov 18 00:22:50.613 INFO [stdout] 7cb1b11572a0bb57cc2d7efdaa65bcc8f96b92bdfcc5e2c7922a78565c25c40b