Issue with TypeScript Generics Causing Panic in encore run

[theGlenn]

It seems that encore run does not handle TypeScript generics well.

The following code causes a panic when SearchResult has a generic parameter.

Non-Generic Version:

interface SearchResult {
  id: string | number;
  vectors?: number[] | null;
  payload?: any;
}

export const search = api({ method: "POST", path: "/qdrant" },
  async function (args: SeachArgs): Promise<{ results: SearchResult[] }> {
    return { results: [] };
  }
);

Generic Version:

interface SearchResult<T = any> {
  id: string | number;
  vectors?: number[] | null;
  payload?: T;
}

Panic Output:

thread '<unnamed>' panicked at runtimes/core/src/api/schema/encoding.rs:327:46:
index out of bounds: the len is 0 but the index is 0
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
thread '<unnamed>' panicked at core/src/panicking.rs:221:5:
panic in a function that cannot unwind
stack backtrace:
   0:        0x11ccdffc0 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h7adefaad4a31afc0
   1:        0x11c23ddfc - core::fmt::write::h381c0b0ce6ab972a
   2:        0x11ccb52bc - std::io::Write::write_fmt::h75af97148630d8d3
   3:        0x11cce3b04 - std::sys::backtrace::BacktraceLock::print::h8baf33e22611de71
   4:        0x11cce3980 - std::panicking::default_hook::{{closure}}::h369c7295ef58c5b1
   5:        0x11cce4258 - std::panicking::rust_panic_with_hook::h7d795911432661cb
   6:        0x11cce3c3c - std::panicking::begin_panic_handler::{{closure}}::h36f15310ecbde379
   7:        0x11cce3bd4 - std::sys::backtrace::__rust_end_short_backtrace::heed121414170e0c7
   8:        0x11cce3bc8 - _rust_begin_unwind
   9:        0x11c242e3c - core::panicking::panic_nounwind_fmt::h5d86a478a9d7437c
  10:        0x11c242e98 - core::panicking::panic_nounwind::he171ad52d328e60b
  11:        0x11c242e50 - core::panicking::panic_cannot_unwind::h2dd8cd735765e065
  12:        0x11c288b5c - encore_js_runtime::runtime::__napi_impl_helper__Runtime__9::__napi__new::ha23a791975f51618
thread caused non-unwinding panic. aborting.

Steps to Reproduce:

Define an interface such as SearchResult with a generic parameter.
Run the encore run command.

Expected Behavior: The encore run command should handle TypeScript generics without causing a panic.

Actual Behavior: The encore run command causes a panic when SearchResult has a generic parameter.

Additional Context:

Encore.dev version: v1.45.2
Node.js version: v21.7.3
OS: Apple M1 Pro - Sonoma 14.6.1