Bug report: jco crash error

[xiaozzzZZzzz240]

Summary

We use JavaScript and Rust to construct a Wasm component and execute that in wasmtime and jco.
Wasmtime sucessfully print the result, however, jco crashed.

repo: https://github.com/xiaozzzZZzzz240/jco_issue_1390

Environment

jco 1.16.1
wasmtime 41.0.0
OS: macOS Sequoia 15.7
CPU: Intel Core i7

Reproduce steps

The specific reproduction steps are as follows:

1. Use the following command to generate JavaScript binding files from generated_wit_00000.wit.
   jco guest-types xxx/witfiles/package3hl16smu1p --world-name world0-pvwxtgtmlk --out-dir xxx/javascript/world0-pvwxtgtmlk

2. Implement the JavaScript program as shown in the javascript directory shown in the repo.

3. Use the following command to generate Wasm component file from JavaScript.
   jco componentize xxx/javascript/world0-pvwxtgtmlk/world0-pvwxtgtmlk_generated.js --wit xxx/witfiles/package3hl16smu1p --world-name world0-pvwxtgtmlk --disable http fetch-event --out xxx/componentfiles/world0-pvwxtgtmlk_fromJavaScript.wasm

4. Use the following command to generate Rust binding files from generated_wit_00000b.wit.
   wit-bindgen rust xxx/witfiles/package3hl16smu1p --world world1-consumer --generate-all --out-dir xxx/rust/world1-consumer/wit_bindings

5. Implement the Rust program as shown in the rust directory shown in the repo.

6. Use the following command to generate Wasm component file from Rust.
   cd xxx/rust/world1-consumer
cargo build --target wasm32-wasip2

7. Use wac to combine the two Wasm component files:
   wac plug xxx/componentfiles/world1-consumer_fromRust.wasm --plug xxx/componentfiles/world0-pvwxtgtmlk_fromJavaScript.wasm -o xxx/componentfiles/world1-consumer_fromRust_importworld0-pvwxtgtmlk_fromJavaScript.wasm

8. Use wasmtime to run the final Wasm component file:
   wasmtime run world1-consumer_fromRust_importworld0-pvwxtgtmlk_fromJavaScript.wasm
   Wasmtime prints:

[diag-single] borrow1=f1
[diag-single] size1=101
[diag-single] borrow2=f1
[diag-single] size2=101

9. Use jco to run the same final Wasm component file:
   jco run world1-consumer_fromRust_importworld0-pvwxtgtmlk_fromJavaScript.wasm
   jco prints:

[diag-single] borrow1=f1
can't access property "rep", repTable.get(...) is undefined
Stack:
  export_itf0Tmmdqdfhit$file$method$size@/var/folders/ng/263gml_52h33wsbthhfjjr980000gn/T/74940e2374ce/sources/initializer.js:12091:23

Redirecting call to abort() to mozalloc_abort

RuntimeError: unreachable
    at wasm://wasm/0321339a:wasm-function[12489]:0x885bee
    at wasm://wasm/0321339a:wasm-function[4582]:0x1abaef
    at mydefined:package3hl16smu1p/itf0-tmmdqdfhit#[method]file.size (wasm://wasm/0321339a:wasm-function[12701]:0x89d101)
    at wasm://wasm/c4656136:wasm-function[8]:0x16b
    at withinwit_rust_component.wasm._ZN24withinwit_rust_component12wit_bindings9mydefined17package3hl16smu1p15itf0_tmmdqdfhit4File4size17h09e5035072f9c394E (wasm://wasm/withinwit_rust_component.wasm-00aef5b6:wasm-function[22]:0x9b6)
    at withinwit_rust_component.wasm._ZN126_$LT$withinwit_rust_component..Component$u20$as$u20$withinwit_rust_component..wit_bindings..exports..wasi..cli..run..Guest$GT$3run17hf6a1a59ac95c8ea4E (wasm://wasm/withinwit_rust_component.wasm-00aef5b6:wasm-function[34]:0xe41)
    at withinwit_rust_component.wasm._ZN24withinwit_rust_component12wit_bindings7exports4wasi3cli3run16_export_run_cabi17h276ae912c2818d67E (wasm://wasm/withinwit_rust_component.wasm-00aef5b6:wasm-function[37]:0x1016)
    at withinwit_rust_component.wasm.wasi:cli/run@0.2.0#run (wasm://wasm/withinwit_rust_component.wasm-00aef5b6:wasm-function[35]:0xfab)
    at fn (file:///private/var/folders/ng/263gml_52h33wsbthhfjjr980000gn/T/AmyRXE/world1-consumer_fromRust_importworld0-pvwxtgtmlk_fromJavaScript.js:31647:15)
    at _withGlobalCurrentTaskMeta (file:///private/var/folders/ng/263gml_52h33wsbthhfjjr980000gn/T/AmyRXE/world1-consumer_fromRust_importworld0-pvwxtgtmlk_fromJavaScript.js:451:12)

Simplified reproduction steps

1. Use wasmtime to run the final Wasm component file:
   wasmtime run world1-consumer_fromRust_importworld0-pvwxtgtmlk_fromJavaScript.wasm
   Wasmtime prints:

[diag-single] borrow1=f1
[diag-single] size1=101
[diag-single] borrow2=f1
[diag-single] size2=101

2. Use jco to run the same final Wasm component file:
   jco run world1-consumer_fromRust_importworld0-pvwxtgtmlk_fromJavaScript.wasm
   jco prints:

[diag-single] borrow1=f1
can't access property "rep", repTable.get(...) is undefined
Stack:
  export_itf0Tmmdqdfhit$file$method$size@/var/folders/ng/263gml_52h33wsbthhfjjr980000gn/T/74940e2374ce/sources/initializer.js:12091:23

Redirecting call to abort() to mozalloc_abort

RuntimeError: unreachable
    at wasm://wasm/0321339a:wasm-function[12489]:0x885bee
    at wasm://wasm/0321339a:wasm-function[4582]:0x1abaef
    at mydefined:package3hl16smu1p/itf0-tmmdqdfhit#[method]file.size (wasm://wasm/0321339a:wasm-function[12701]:0x89d101)
    at wasm://wasm/c4656136:wasm-function[8]:0x16b
    at withinwit_rust_component.wasm._ZN24withinwit_rust_component12wit_bindings9mydefined17package3hl16smu1p15itf0_tmmdqdfhit4File4size17h09e5035072f9c394E (wasm://wasm/withinwit_rust_component.wasm-00aef5b6:wasm-function[22]:0x9b6)
    at withinwit_rust_component.wasm._ZN126_$LT$withinwit_rust_component..Component$u20$as$u20$withinwit_rust_component..wit_bindings..exports..wasi..cli..run..Guest$GT$3run17hf6a1a59ac95c8ea4E (wasm://wasm/withinwit_rust_component.wasm-00aef5b6:wasm-function[34]:0xe41)
    at withinwit_rust_component.wasm._ZN24withinwit_rust_component12wit_bindings7exports4wasi3cli3run16_export_run_cabi17h276ae912c2818d67E (wasm://wasm/withinwit_rust_component.wasm-00aef5b6:wasm-function[37]:0x1016)
    at withinwit_rust_component.wasm.wasi:cli/run@0.2.0#run (wasm://wasm/withinwit_rust_component.wasm-00aef5b6:wasm-function[35]:0xfab)
    at fn (file:///private/var/folders/ng/263gml_52h33wsbthhfjjr980000gn/T/AmyRXE/world1-consumer_fromRust_importworld0-pvwxtgtmlk_fromJavaScript.js:31647:15)
    at _withGlobalCurrentTaskMeta (file:///private/var/folders/ng/263gml_52h33wsbthhfjjr980000gn/T/AmyRXE/world1-consumer_fromRust_importworld0-pvwxtgtmlk_fromJavaScript.js:451:12)