[INFO] cloning repository https://github.com/libraries/ckb-exec-demo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/libraries/ckb-exec-demo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flibraries%2Fckb-exec-demo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flibraries%2Fckb-exec-demo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1b313db92dc29f15d20710444a3a86a7081a3b99
[INFO] testing libraries/ckb-exec-demo against beta-2026-04-21 for beta-1.96-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flibraries%2Fckb-exec-demo" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/libraries/ckb-exec-demo
[INFO] finished tweaking git repo https://github.com/libraries/ckb-exec-demo
[INFO] tweaked toml for git repo https://github.com/libraries/ckb-exec-demo written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/libraries/ckb-exec-demo on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/libraries/ckb-exec-demo 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" "+beta-2026-04-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr]   |
[INFO] [stderr]   = note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr]   = note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr]   = note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/source:/opt/rustwide/workdir:ro,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" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e6e2881bf12ceeb2fbe4295fefd8dcc752f6f2083fe744286eb5787dabb4d27b
[INFO] running `Command { std: "docker" "start" "-a" "e6e2881bf12ceeb2fbe4295fefd8dcc752f6f2083fe744286eb5787dabb4d27b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e6e2881bf12ceeb2fbe4295fefd8dcc752f6f2083fe744286eb5787dabb4d27b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e6e2881bf12ceeb2fbe4295fefd8dcc752f6f2083fe744286eb5787dabb4d27b", kill_on_drop: false }`
[INFO] [stdout] e6e2881bf12ceeb2fbe4295fefd8dcc752f6f2083fe744286eb5787dabb4d27b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/source:/opt/rustwide/workdir:ro,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" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7f417ba3882af8101b46d38c489018a774d847454ce4a084b06b8a28493bb679
[INFO] running `Command { std: "docker" "start" "-a" "7f417ba3882af8101b46d38c489018a774d847454ce4a084b06b8a28493bb679", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr]   |
[INFO] [stderr]   = note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr]   = note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr]   = note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]    Compiling proc-macro2 v1.0.50
[INFO] [stderr]    Compiling unicode-ident v1.0.6
[INFO] [stderr]    Compiling quote v1.0.23
[INFO] [stderr]    Compiling syn v1.0.107
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]    Compiling serde_derive v1.0.152
[INFO] [stderr]    Compiling serde v1.0.152
[INFO] [stderr]    Compiling cc v1.0.78
[INFO] [stderr]    Compiling thiserror v1.0.38
[INFO] [stderr]    Compiling faster-hex v0.6.1
[INFO] [stderr]    Compiling cty v0.2.2
[INFO] [stderr]    Compiling heapsize v0.4.2
[INFO] [stderr]    Compiling crossbeam-utils v0.8.14
[INFO] [stderr]    Compiling anyhow v1.0.68
[INFO] [stderr]    Compiling siphasher v0.3.10
[INFO] [stderr]    Compiling crc32fast v1.3.2
[INFO] [stderr]    Compiling once_cell v1.17.0
[INFO] [stderr]    Compiling phf_shared v0.8.0
[INFO] [stderr]    Compiling miniz_oxide v0.6.2
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling merkle-cbt v0.3.2
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling crossbeam-channel v0.5.6
[INFO] [stderr]    Compiling bit-vec v0.6.3
[INFO] [stderr]    Compiling rand_pcg v0.2.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling flate2 v1.0.25
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]    Compiling ckb-channel v0.104.0
[INFO] [stderr]    Compiling walkdir v2.3.2
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling blake2b-rs v0.2.0
[INFO] [stderr]    Compiling phf v0.8.0
[INFO] [stderr]    Compiling includedir v0.6.0
[INFO] [stderr]    Compiling secp256k1-sys v0.4.2
[INFO] [stderr]    Compiling serde_json v1.0.91
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling ryu v1.0.12
[INFO] [stderr]    Compiling itoa v1.0.5
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling eaglesong v0.1.0
[INFO] [stderr]    Compiling plain v0.2.3
[INFO] [stderr]    Compiling ckb-vm v0.21.3
[INFO] [stderr]    Compiling ckb-hash v0.104.0
[INFO] [stderr]    Compiling getrandom v0.2.8
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling ckb-constant v0.104.0
[INFO] [stderr]    Compiling phf_generator v0.8.0
[INFO] [stderr]    Compiling ahash v0.7.6
[INFO] [stderr]    Compiling phf_codegen v0.8.0
[INFO] [stderr]    Compiling mapr v0.8.0
[INFO] [stderr]    Compiling ckb-vm-definitions v0.21.3
[INFO] [stderr]    Compiling fastrand v1.8.0
[INFO] [stderr]    Compiling ckb-script v0.104.0
[INFO] [stderr]    Compiling includedir_codegen v0.6.0
[INFO] [stderr]    Compiling remove_dir_all v0.5.3
[INFO] [stderr]    Compiling ckb-logger v0.104.0
[INFO] [stderr]    Compiling ckb-std v0.10.0
[INFO] [stderr]    Compiling tempfile v3.3.0
[INFO] [stderr]    Compiling ckb-system-scripts v0.5.4
[INFO] [stderr]    Compiling hashbrown v0.12.3
[INFO] [stderr]    Compiling buddy-alloc v0.4.1
[INFO] [stderr]    Compiling linked_hash_set v0.1.4
[INFO] [stderr]    Compiling faketime v0.2.1
[INFO] [stderr]    Compiling cstr_core v0.2.6
[INFO] [stderr]    Compiling ckb-always-success-script v0.0.1
[INFO] [stderr]    Compiling lru v0.7.8
[INFO] [stderr]    Compiling secp256k1 v0.20.3
[INFO] [stderr]    Compiling thiserror-impl v1.0.38
[INFO] [stderr]    Compiling numext-constructor v0.1.6
[INFO] [stderr]    Compiling derive_more v0.99.17
[INFO] [stderr]    Compiling scroll_derive v0.10.5
[INFO] [stderr]    Compiling scroll v0.10.2
[INFO] [stderr]    Compiling goblin v0.4.0
[INFO] [stderr]    Compiling goblin v0.2.3
[INFO] [stderr]    Compiling bytes v1.3.0
[INFO] [stderr]    Compiling ckb-occupied-capacity-core v0.104.0
[INFO] [stderr]    Compiling ckb-fixed-hash-core v0.104.0
[INFO] [stderr]    Compiling numext-fixed-uint-core v0.1.6
[INFO] [stderr]    Compiling toml v0.5.10
[INFO] [stderr]    Compiling ckb-occupied-capacity-macros v0.104.0
[INFO] [stderr]    Compiling ckb-fixed-hash-macros v0.104.0
[INFO] [stderr]    Compiling ckb-occupied-capacity v0.104.0
[INFO] [stderr]    Compiling ckb-error v0.104.0
[INFO] [stderr]    Compiling ckb-fixed-hash v0.104.0
[INFO] [stderr]    Compiling molecule v0.7.3
[INFO] [stderr]    Compiling ckb-crypto v0.104.0
[INFO] [stderr]    Compiling ckb-standalone-types v0.1.2
[INFO] [stderr]    Compiling ckb-verification-traits v0.104.0
[INFO] [stderr]    Compiling ckb-exec-demo v0.1.0 (/opt/rustwide/workdir/contracts/ckb-exec-demo)
[INFO] [stderr]    Compiling echo v0.1.0 (/opt/rustwide/workdir/contracts/echo)
[INFO] [stdout] error: the `#[alloc_error_handler]` in this crate conflicts with allocation error handler in: std
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> contracts/ckb-exec-demo/src/main.rs:9:1
[INFO] [stdout]   |
[INFO] [stdout] 9 | #![feature(asm_sym)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `asm_sym` has been stable since `1.66.0` and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `lang_items` is internal to the compiler or standard library
[INFO] [stdout]   --> contracts/ckb-exec-demo/src/main.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | #![feature(lang_items)]
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: using it is strongly discouraged
[INFO] [stdout]    = note: `#[warn(internal_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::arch::asm`
[INFO] [stdout]   --> contracts/ckb-exec-demo/src/main.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | use core::arch::asm;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0152]: found duplicate lang item `eh_personality`
[INFO] [stdout]   --> contracts/ckb-exec-demo/src/main.rs:20:1
[INFO] [stdout]    |
[INFO] [stdout] 20 | ckb_std::entry!(program_entry);
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: the lang item is first defined in crate `std` (which `molecule` depends on)
[INFO] [stdout]    = note: first definition in `std` loaded from /opt/rustwide/rustup-home/toolchains/beta-2026-04-21-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-0b731ea8964f0f7c.so, /opt/rustwide/rustup-home/toolchains/beta-2026-04-21-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-0b731ea8964f0f7c.rlib, /opt/rustwide/rustup-home/toolchains/beta-2026-04-21-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-0b731ea8964f0f7c.rmeta
[INFO] [stdout]    = note: second definition in the local crate (`ckb_exec_demo`)
[INFO] [stdout]    = note: this error originates in the macro `ckb_std::entry` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0152, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0152`.
[INFO] [stdout] 
[INFO] [stdout] error: the `#[alloc_error_handler]` in this crate conflicts with allocation error handler in: std
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> contracts/echo/src/main.rs:9:1
[INFO] [stdout]   |
[INFO] [stdout] 9 | #![feature(asm_sym)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `asm_sym` has been stable since `1.66.0` and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ckb-exec-demo` (bin "ckb-exec-demo") due to 3 previous errors; 2 warnings emitted
[INFO] [stdout] warning: the feature `lang_items` is internal to the compiler or standard library
[INFO] [stdout]   --> contracts/echo/src/main.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | #![feature(lang_items)]
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: using it is strongly discouraged
[INFO] [stdout]    = note: `#[warn(internal_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused import: `core::arch::asm`
[INFO] [stdout]   --> contracts/echo/src/main.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | use core::arch::asm;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0152]: found duplicate lang item `eh_personality`
[INFO] [stdout]   --> contracts/echo/src/main.rs:20:1
[INFO] [stdout]    |
[INFO] [stdout] 20 | ckb_std::entry!(program_entry);
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: the lang item is first defined in crate `std` (which `molecule` depends on)
[INFO] [stdout]    = note: first definition in `std` loaded from /opt/rustwide/rustup-home/toolchains/beta-2026-04-21-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-0b731ea8964f0f7c.so, /opt/rustwide/rustup-home/toolchains/beta-2026-04-21-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-0b731ea8964f0f7c.rlib, /opt/rustwide/rustup-home/toolchains/beta-2026-04-21-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-0b731ea8964f0f7c.rmeta
[INFO] [stdout]    = note: second definition in the local crate (`echo`)
[INFO] [stdout]    = note: this error originates in the macro `ckb_std::entry` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0152, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0152`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `echo` (bin "echo") due to 3 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "7f417ba3882af8101b46d38c489018a774d847454ce4a084b06b8a28493bb679", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f417ba3882af8101b46d38c489018a774d847454ce4a084b06b8a28493bb679", kill_on_drop: false }`
[INFO] [stdout] 7f417ba3882af8101b46d38c489018a774d847454ce4a084b06b8a28493bb679
