error: invalid definition of the runtime `free` symbol used by the standard library
  --> wavedrom-wasm/src/lib.rs:21:1
   |
21 | pub unsafe extern "C" fn free(ptr: *mut u8, size: usize) {
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: expected `unsafe extern "C" fn(*mut c_void)` (for the current target)
           found    `unsafe extern "C" fn(*mut u8, usize)`
   = help: either fix the signature or remove any attributes like `#[unsafe(no_mangle)]`, `#[unsafe(export_name = "free")]`, or `#[link_name = "free"]`
   = note: `#[deny(invalid_runtime_symbol_definitions)]` on by default


--- wavedrom-wasm/src/lib.rs.orig	2026-10-12 16:14:03 UTC
+++ wavedrom-wasm/src/lib.rs
@@ -15,13 +15,6 @@ pub unsafe extern "C" fn malloc(size: usize) -> *const
     Vec::with_capacity(size).leak().as_ptr() as *const u8
 }
 
-/// # Safety
-/// Only call on malloced chunks
-#[no_mangle]
-pub unsafe extern "C" fn free(ptr: *mut u8, size: usize) {
-    unsafe { Vec::from_raw_parts(ptr, 0, size) };
-}
-
 #[repr(u8)]
 enum RenderError {
     JsonDeserializeError = 1,