[INFO] cloning repository https://github.com/jolars/ravel
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jolars/ravel" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjolars%2Fravel", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjolars%2Fravel'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6535641bd8d26a0bb321fa24840fc7239102eda8
[INFO] checking jolars/ravel against 846e51f66b1e7b49ba9e3988c58ccfe5817ce0a9 for pr-164812
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjolars%2Fravel" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-7-tc1/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/jolars/ravel
[INFO] finished tweaking git repo https://github.com/jolars/ravel
[INFO] tweaked toml for git repo https://github.com/jolars/ravel written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/jolars/ravel on toolchain 846e51f66b1e7b49ba9e3988c58ccfe5817ce0a9
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+846e51f66b1e7b49ba9e3988c58ccfe5817ce0a9" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/jolars/ravel already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+846e51f66b1e7b49ba9e3988c58ccfe5817ce0a9" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: `package.homepage` is redundant with `package.documentation`
[INFO] [stderr]    --> Cargo.toml:123:12
[INFO] [stderr]     |
[INFO] [stderr] 122 | documentation = "https://arity.cc"
[INFO] [stderr]     |                 ------------------
[INFO] [stderr] 123 | homepage = "https://arity.cc"
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `cargo::redundant_homepage` is set to `warn` by default
[INFO] [stderr] help: consider removing `package.homepage`
[INFO] [stderr] warning: `arity` (manifest) generated 1 warning
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Updating git repository `https://github.com/posit-dev/air`
[INFO] [stderr]     Updating git repository `https://github.com/lionel-/biome`
[INFO] [stderr]     Updating git repository `https://github.com/r-lib/tree-sitter-r`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded utf8-zero v0.8.1
[INFO] [stderr]   Downloaded ureq v3.5.0
[INFO] [stderr]   Downloaded mimalloc v0.1.52
[INFO] [stderr]   Downloaded roff v1.1.1
[INFO] [stderr]   Downloaded salsa-macro-rules v0.28.5
[INFO] [stderr]   Downloaded vsimd v0.8.0
[INFO] [stderr]   Downloaded ureq-proto v0.6.5
[INFO] [stderr]   Downloaded smallvec v1.16.4
[INFO] [stderr]   Downloaded tree-sitter-language v0.1.7
[INFO] [stderr]   Downloaded drop_bomb v0.1.5
[INFO] [stderr]   Downloaded ref-cast-impl v1.0.27
[INFO] [stderr]   Downloaded jiff-static v0.2.38
[INFO] [stderr]   Downloaded env_filter v2.0.0
[INFO] [stderr]   Downloaded terminal_size v0.4.4
[INFO] [stderr]   Downloaded lsp-server v0.10.0
[INFO] [stderr]   Downloaded criterion-plot v0.8.2
[INFO] [stderr]   Downloaded clapdown v0.3.0
[INFO] [stderr]   Downloaded hashlink v0.12.2
[INFO] [stderr]   Downloaded env_logger v0.11.11
[INFO] [stderr]   Downloaded alloca v0.4.0
[INFO] [stderr]   Downloaded strum v0.28.0
[INFO] [stderr]   Downloaded ref-cast v1.0.27
[INFO] [stderr]   Downloaded uuid-simd v0.8.0
[INFO] [stderr]   Downloaded borrow-or-share v0.2.4
[INFO] [stderr]   Downloaded boxcar v0.2.14
[INFO] [stderr]   Downloaded bytecount v0.6.9
[INFO] [stderr]   Downloaded globset v0.4.21
[INFO] [stderr]   Downloaded defmt-macros v1.2.0
[INFO] [stderr]   Downloaded page_size v0.6.0
[INFO] [stderr]   Downloaded cc v1.10.0
[INFO] [stderr]   Downloaded fluent-uri v0.1.4
[INFO] [stderr]   Downloaded outref v0.5.2
[INFO] [stderr]   Downloaded micromap v0.3.0
[INFO] [stderr]   Downloaded text-size v1.1.1
[INFO] [stderr]   Downloaded countme v3.0.1
[INFO] [stderr]   Downloaded crc32fast v1.5.3
[INFO] [stderr]   Downloaded strum_macros v0.28.0
[INFO] [stderr]   Downloaded num-cmp v0.1.0
[INFO] [stderr]   Downloaded jsonschema-regex v0.60.2
[INFO] [stderr]   Downloaded defmt-parser v1.1.0
[INFO] [stderr]   Downloaded rustc-demangle v0.1.28
[INFO] [stderr]   Downloaded schemars_derive v1.2.3
[INFO] [stderr]   Downloaded inventory v0.3.25
[INFO] [stderr]   Downloaded crossbeam-queue v0.3.14
[INFO] [stderr]   Downloaded clap_mangen v0.3.3
[INFO] [stderr]   Downloaded streaming-iterator v0.1.9
[INFO] [stderr]   Downloaded salsa-macros v0.28.5
[INFO] [stderr]   Downloaded defmt v1.2.0
[INFO] [stderr]   Downloaded serde_derive_internals v0.30.0
[INFO] [stderr]   Downloaded thin-vec v0.2.21
[INFO] [stderr]   Downloaded lsp-types v0.97.0
[INFO] [stderr]   Downloaded smol_str v0.3.7
[INFO] [stderr]   Downloaded similar-asserts v2.0.0
[INFO] [stderr]   Downloaded rd-helpdb v0.5.0
[INFO] [stderr]   Downloaded annotate-snippets v0.12.17
[INFO] [stderr]   Downloaded intrusive-collections v0.10.3
[INFO] [stderr]   Downloaded rowan v0.17.0
[INFO] [stderr]   Downloaded fluent-uri v0.4.1
[INFO] [stderr]   Downloaded ignore v0.4.34
[INFO] [stderr]   Downloaded clap_complete v4.6.11
[INFO] [stderr]   Downloaded toml v1.1.8+spec-1.1.0
[INFO] [stderr]   Downloaded borsh v1.8.1
[INFO] [stderr]   Downloaded referencing v0.60.2
[INFO] [stderr]   Downloaded jsonschema-value v0.60.2
[INFO] [stderr]   Downloaded insta v1.49.0
[INFO] [stderr]   Downloaded schemars v1.2.3
[INFO] [stderr]   Downloaded fraction v0.17.0
[INFO] [stderr]   Downloaded webpki-roots v1.0.11
[INFO] [stderr]   Downloaded toml_parser v1.1.5+spec-1.1.0
[INFO] [stderr]   Downloaded jiff-core v0.1.1
[INFO] [stderr]   Downloaded criterion v0.8.2
[INFO] [stderr]   Downloaded rd-rds v0.5.0
[INFO] [stderr]   Downloaded rd-ast v0.5.0
[INFO] [stderr]   Downloaded tree-sitter v0.24.7
[INFO] [stderr]   Downloaded similar v3.2.1
[INFO] [stderr]   Downloaded fancy-regex v0.19.2
[INFO] [stderr]   Downloaded bstr v1.13.1
[INFO] [stderr]   Downloaded salsa v0.28.5
[INFO] [stderr]   Downloaded libmimalloc-sys v0.1.49
[INFO] [stderr]   Downloaded jiff v0.2.38
[INFO] [stderr]   Downloaded jsonschema v0.60.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:c0af3998e971868164375a7dfb646c9933ddd1a3bdb00fa2041266763dc1eeab" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 6037bd8687d62f7d561da9ae7a4c2f04a53c875c5df5d8f8e70f3db0eed02a6e
[INFO] running `Command { std: "docker" "start" "6037bd8687d62f7d561da9ae7a4c2f04a53c875c5df5d8f8e70f3db0eed02a6e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6037bd8687d62f7d561da9ae7a4c2f04a53c875c5df5d8f8e70f3db0eed02a6e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "6037bd8687d62f7d561da9ae7a4c2f04a53c875c5df5d8f8e70f3db0eed02a6e" "/opt/rustwide/cargo-home/bin/cargo" "+846e51f66b1e7b49ba9e3988c58ccfe5817ce0a9" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6037bd8687d62f7d561da9ae7a4c2f04a53c875c5df5d8f8e70f3db0eed02a6e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-w" "/opt/rustwide/workdir" "--user" "0:0" "6037bd8687d62f7d561da9ae7a4c2f04a53c875c5df5d8f8e70f3db0eed02a6e" "/opt/rustwide/cargo-home/bin/cargo" "+846e51f66b1e7b49ba9e3988c58ccfe5817ce0a9" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] warning: `package.homepage` is redundant with `package.documentation`
[INFO] [stderr]    --> Cargo.toml:123:12
[INFO] [stderr]     |
[INFO] [stderr] 122 | documentation = "https://arity.cc"
[INFO] [stderr]     |                 ------------------
[INFO] [stderr] 123 | homepage = "https://arity.cc"
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `cargo::redundant_homepage` is set to `warn` by default
[INFO] [stderr] help: consider removing `package.homepage`
[INFO] [stderr] warning: `arity` (manifest) generated 1 warning
[INFO] [stderr]    Compiling proc-macro2 v1.0.107
[INFO] [stderr]    Compiling unicode-ident v1.0.27
[INFO] [stderr]    Compiling quote v1.0.47
[INFO] [stderr]    Compiling serde_core v1.0.229
[INFO] [stderr]     Checking cfg-if v1.0.5
[INFO] [stderr]    Compiling serde v1.0.229
[INFO] [stderr]    Compiling libc v0.2.191
[INFO] [stderr]    Compiling autocfg v1.5.1
[INFO] [stderr]     Checking memchr v2.8.3
[INFO] [stderr]    Compiling shlex v2.0.1
[INFO] [stderr]    Compiling find-msvc-tools v0.1.15
[INFO] [stderr]     Checking once_cell v1.21.4
[INFO] [stderr]    Compiling cc v1.10.0
[INFO] [stderr]     Checking unicode-segmentation v1.13.3
[INFO] [stderr]     Checking itoa v1.0.18
[INFO] [stderr]    Compiling rustix v1.1.5
[INFO] [stderr]    Compiling zmij v1.0.23
[INFO] [stderr]    Compiling memoffset v0.9.1
[INFO] [stderr]     Checking bitflags v2.13.2
[INFO] [stderr]    Compiling serde_json v1.0.154
[INFO] [stderr]     Checking regex-syntax v0.8.11
[INFO] [stderr]     Checking similar v2.7.0
[INFO] [stderr]    Compiling syn v3.0.9
[INFO] [stderr]    Compiling syn v2.0.119
[INFO] [stderr]     Checking aho-corasick v1.1.5
[INFO] [stderr]     Checking hashbrown v0.14.5
[INFO] [stderr]     Checking text-size v1.1.1
[INFO] [stderr]     Checking countme v3.0.1
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling getrandom v0.4.3
[INFO] [stderr]     Checking rowan v0.17.0
[INFO] [stderr]    Compiling zerocopy v0.8.63
[INFO] [stderr]     Checking smol_str v0.3.7
[INFO] [stderr]     Checking regex-automata v0.4.18
[INFO] [stderr]     Checking fastrand v2.5.0
[INFO] [stderr]     Checking rustc-hash v2.1.3
[INFO] [stderr]     Checking anstyle v1.0.14
[INFO] [stderr]     Checking anstyle-parse v1.0.0
[INFO] [stderr]     Checking console v0.16.6
[INFO] [stderr]     Checking colorchoice v1.0.5
[INFO] [stderr]     Checking either v1.19.0
[INFO] [stderr]     Checking anstream v1.0.0
[INFO] [stderr]     Checking clap_lex v1.1.1
[INFO] [stderr]     Checking tracing-core v0.1.36
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking clap_builder v4.6.7
[INFO] [stderr]     Checking tempfile v3.27.0
[INFO] [stderr]     Checking walkdir v2.5.0
[INFO] [stderr]    Compiling alloca v0.4.0
[INFO] [stderr]     Checking ciborium-io v0.2.2
[INFO] [stderr]     Checking itertools v0.13.0
[INFO] [stderr]     Checking insta v1.49.0
[INFO] [stderr]     Checking tracing v0.1.44
[INFO] [stderr]     Checking cast v0.3.0
[INFO] [stderr]     Checking page_size v0.6.0
[INFO] [stderr]     Checking anes v0.1.6
[INFO] [stderr]     Checking oorandom v11.1.5
[INFO] [stderr]    Compiling crossbeam-utils v0.8.23
[INFO] [stderr]    Compiling utf8parse v0.2.2
[INFO] [stderr]    Compiling anstyle-query v1.1.5
[INFO] [stderr]    Compiling is_terminal_polyfill v1.70.2
[INFO] [stderr]     Checking log v0.4.35
[INFO] [stderr]    Compiling thiserror v2.0.21
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.21
[INFO] [stderr]    Compiling strsim v0.11.1
[INFO] [stderr]    Compiling ring v0.17.14
[INFO] [stderr]    Compiling crc32fast v1.5.3
[INFO] [stderr]     Checking allocator-api2 v0.2.21
[INFO] [stderr]    Compiling crossbeam-deque v0.8.8
[INFO] [stderr]     Checking regex v1.13.1
[INFO] [stderr]     Checking equivalent v1.0.3
[INFO] [stderr]     Checking criterion-plot v0.8.2
[INFO] [stderr]     Checking foldhash v0.2.0
[INFO] [stderr]     Checking num-integer v0.1.47
[INFO] [stderr]     Checking hashbrown v0.17.1
[INFO] [stderr]     Checking simd-adler32 v0.3.10
[INFO] [stderr]     Checking smallvec v1.16.4
[INFO] [stderr]     Checking zeroize v1.9.1
[INFO] [stderr]     Checking miniz_oxide v0.9.1
[INFO] [stderr]     Checking parking_lot_core v0.9.12
[INFO] [stderr]     Checking rustls-pki-types v1.15.1
[INFO] [stderr]    Compiling zerocopy-derive v0.8.63
[INFO] [stderr]     Checking getrandom v0.2.17
[INFO] [stderr]    Compiling httparse v1.10.1
[INFO] [stderr]    Compiling ref-cast v1.0.27
[INFO] [stderr]    Compiling getrandom v0.3.4
[INFO] [stderr]     Checking untrusted v0.9.0
[INFO] [stderr]    Compiling ahash v0.8.12
[INFO] [stderr]     Checking flate2 v1.1.10
[INFO] [stderr]     Checking parking_lot v0.12.5
[INFO] [stderr]     Checking num-bigint v0.4.8
[INFO] [stderr]    Compiling libmimalloc-sys v0.1.49
[INFO] [stderr]    Compiling roff v1.1.1
[INFO] [stderr]    Compiling portable-atomic v1.15.0
[INFO] [stderr]    Compiling typeid v1.0.3
[INFO] [stderr]    Compiling serde_derive v1.0.229
[INFO] [stderr]    Compiling clap_derive v4.6.7
[INFO] [stderr]    Compiling thiserror-impl v2.0.21
[INFO] [stderr]    Compiling ref-cast-impl v1.0.27
[INFO] [stderr]    Compiling rustls v0.23.46
[INFO] [stderr]     Checking bytes v1.12.1
[INFO] [stderr]     Checking num-rational v0.4.2
[INFO] [stderr]     Checking http v1.5.0
[INFO] [stderr]     Checking rd-rds v0.5.0
[INFO] [stderr]     Checking clap v4.6.7
[INFO] [stderr]     Checking rayon-core v1.13.0
[INFO] [stderr]    Compiling clapdown v0.3.0
[INFO] [stderr]    Compiling clap_complete v4.6.11
[INFO] [stderr]    Compiling clap_mangen v0.3.3
[INFO] [stderr]     Checking num-iter v0.1.46
[INFO] [stderr]     Checking num-complex v0.4.6
[INFO] [stderr]     Checking bstr v1.13.1
[INFO] [stderr]     Checking rustls-webpki v0.103.16
[INFO] [stderr]     Checking winnow v1.0.4
[INFO] [stderr]     Checking base64 v0.23.1
[INFO] [stderr]     Checking subtle v2.6.1
[INFO] [stderr]     Checking jiff-core v0.1.1
[INFO] [stderr]     Checking globset v0.4.21
[INFO] [stderr]     Checking fluent-uri v0.1.4
[INFO] [stderr]     Checking ureq-proto v0.6.5
[INFO] [stderr]     Checking toml_parser v1.1.5+spec-1.1.0
[INFO] [stderr]     Checking num v0.4.3
[INFO] [stderr]    Compiling arity v0.29.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking rayon v1.12.0
[INFO] [stderr]     Checking cobs v0.3.0
[INFO] [stderr]    Compiling salsa-macros v0.28.5
[INFO] [stderr]    Compiling serde_repr v0.1.21
[INFO] [stderr]     Checking jiff v0.2.38
[INFO] [stderr]     Checking webpki-roots v1.0.11
[INFO] [stderr]     Checking hashlink v0.12.2
[INFO] [stderr]     Checking arity-parser v0.7.0 (/opt/rustwide/workdir/crates/arity-parser)
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking indexmap v2.14.2
[INFO] [stderr]     Checking env_filter v2.0.0
[INFO] [stderr]     Checking crossbeam-channel v0.5.17
[INFO] [stderr]     Checking crossbeam-queue v0.3.14
[INFO] [stderr]     Checking toml_datetime v1.1.2+spec-1.1.0
[INFO] [stderr]     Checking serde_spanned v1.1.2
[INFO] [stderr]     Checking similar v3.2.1
[INFO] [stderr]     Checking thin-vec v0.2.21
[INFO] [stderr]    Compiling unicode-general-category v1.1.0
[INFO] [stderr]     Checking bit-vec v0.8.0
[INFO] [stderr]     Checking utf8-zero v0.8.1
[INFO] [stderr]     Checking arity-formatter v0.8.3 (/opt/rustwide/workdir/crates/arity-formatter)
[INFO] [stderr]    Compiling jsonschema-value v0.60.2
[INFO] [stderr]     Checking toml_writer v1.1.3+spec-1.1.0
[INFO] [stderr]     Checking salsa-macro-rules v0.28.5
[INFO] [stderr]     Checking unicode-width v0.2.2
[INFO] [stderr]     Checking borrow-or-share v0.2.4
[INFO] [stderr]     Checking intrusive-collections v0.10.3
[INFO] [stderr]     Checking boxcar v0.2.14
[INFO] [stderr]     Checking inventory v0.3.25
[INFO] [stderr]     Checking annotate-snippets v0.12.17
[INFO] [stderr]     Checking fluent-uri v0.4.1
[INFO] [stderr]     Checking toml v1.1.8+spec-1.1.0
[INFO] [stderr]     Checking salsa v0.28.5
[INFO] [stderr]     Checking ureq v3.5.0
[INFO] [stderr]     Checking bit-set v0.8.0
[INFO] [stderr]     Checking env_logger v0.11.11
[INFO] [stderr]     Checking lsp-server v0.10.0
[INFO] [stderr]     Checking lsp-types v0.97.0
[INFO] [stderr]     Checking postcard v1.1.3
[INFO] [stderr]     Checking fraction v0.17.0
[INFO] [stderr] error: failed to run custom build command for `arity v0.29.0 (/opt/rustwide/workdir)`
[INFO] [stderr] note: To improve backtraces for build dependencies, set the CARGO_PROFILE_DEV_BUILD_OVERRIDE_DEBUG=true environment variable to enable debug information generation.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/arity/f07bfbfc6640b7b4/out/build_script_build` (exit status: 1)
[INFO] [stderr]   --- stderr
[INFO] [stderr]   Error: Os { code: 30, kind: ReadOnlyFilesystem, message: "Read-only file system" }
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "6037bd8687d62f7d561da9ae7a4c2f04a53c875c5df5d8f8e70f3db0eed02a6e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6037bd8687d62f7d561da9ae7a4c2f04a53c875c5df5d8f8e70f3db0eed02a6e", kill_on_drop: false }`
[INFO] [stdout] 6037bd8687d62f7d561da9ae7a4c2f04a53c875c5df5d8f8e70f3db0eed02a6e