$ externref --drop-fn test::drop -o /dev/null tests/integration.rs

Error: failed processing module

Caused by:
    0: failed reading WASM module: magic header not detected: bad magic number -
 expected=[
           0x0,
           0x61,
           0x73,
           0x6d,
       ] actual=[
           0x2f,
           0x2f,
           0x21,
           0x20,
       ] (at offset 0x0)
    1: magic header not detected: bad magic number - expected=[
           0x0,
           0x61,
           0x73,
           0x6d,
       ] actual=[
           0x2f,
           0x2f,
           0x21,
           0x20,
       ] (at offset 0x0)