Self-recursive function with a ternary miscompiles: i64 specialization has empty body (`ret i64 0`)

[dlee]

What happened

A named function whose self-recursive call appears anywhere in a ?:
(either branch, the condition, or via a const) always returns 0. The same
function with if/else is correct. Arrow-function and mutual recursion are
unaffected (no _i64 specialization emitted).

What you expected

idDown(5) → 100 (Node agrees). Perry prints 0.

Minimal reproduction

function idDown(n: number): number {
  return n <= 0 ? 100 : idDown(n - 1);
}
console.log(idDown(5)); // node: 100 — perry: 0

Command you ran:

perry run idDown.ts

Environment

• Perry version: 0.5.1220
• Host OS: macOS 27.0 (arm64)
• Target: native (also reproduces with --output-type dylib)
• Installed via: npm

Diagnostic output

HIR is correct (--trace hir shows the conditional with the recursive call).
--trace llvm (dump in .perry-trace/llvm/idDown_ts.ll) shows the i64
specialization is empty and the boxed entry delegates to it:

define i64 @perry_fn_idDown_ts__idDown_i64(i64 %arg0) alwaysinline {
entry.0:
  %r1 = alloca i64
  store i64 %arg0, ptr %r1
  ret i64 0
}

define double @perry_fn_idDown_ts__idDown(double %arg0) alwaysinline {
entry.0:
  %r1 = fptosi double %arg0 to i64
  %r2 = call i64 @perry_fn_idDown_ts__idDown_i64(i64 %r1)
  %r3 = sitofp i64 %r2 to double
  ret double %r3
}

Anything else

Reproduces with PERRY_NO_CACHE=1. perry check and
--verify-native-regions both pass silently on the miscompiled program.
Workaround: if/else. Checked for dupes; #5784 and #342 are related but
distinct.