Web audio typescript generation failure

When compiling a simple WebAudio program, typescript type generation fails to register runtime exports. In fact, it fails as soon as I use -sAUDIO_WORKLET. I used a simple main function that only returns 0 to ensure that I was making any mistake.

Version of emscripten/emsdk:

emcc (Emscripten gcc/clang-like replacement + linker emulating GNU ld) 3.1.58 (a41843e0860e52c948c1fce20307933c6631c800)
clang version 19.0.0git (https:/github.com/llvm/llvm-project 0a8cd1ed1f4f35905df318015b0dbcb69d81d7c2)
Target: wasm32-unknown-emscripten
Thread model: posix

Failing command line in full: em++ -O3 -DNDEBUG -pthread -sAUDIO_WORKLET -sWASM_WORKERS --emit-tsd ClientTypes.d.ts {ALL OBJECT FILES...} -o Release/Client.js -lembind

Error:

Traceback (most recent call last):
  File "/home/ptah/Tools/emsdk/upstream/emscripten/em++.py", line 15, in <module>
    sys.exit(emcc.main(sys.argv))
             ^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/contextlib.py", line 81, in inner
    return func(*args, **kwds)
           ^^^^^^^^^^^^^^^^^^^
  File "/home/ptah/Tools/emsdk/upstream/emscripten/emcc.py", line 1583, in main
    ret = run(args)
          ^^^^^^^^^
  File "/home/ptah/Tools/emsdk/upstream/emscripten/emcc.py", line 648, in run
    return link.run(linker_inputs, options, state, newargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/ptah/Tools/emsdk/upstream/emscripten/tools/link.py", line 3102, in run
    phase_post_link(options, state, wasm_target, wasm_target, target, js_syms)
  File "/usr/lib/python3.11/contextlib.py", line 81, in inner
    return func(*args, **kwds)
           ^^^^^^^^^^^^^^^^^^^
  File "/home/ptah/Tools/emsdk/upstream/emscripten/tools/link.py", line 1877, in phase_post_link
    phase_emit_tsd(options, wasm_target, state.js_target, js_syms, metadata)
  File "/usr/lib/python3.11/contextlib.py", line 81, in inner
    return func(*args, **kwds)
           ^^^^^^^^^^^^^^^^^^^
  File "/home/ptah/Tools/emsdk/upstream/emscripten/tools/link.py", line 1966, in phase_emit_tsd
    all_tsd = emscripten.create_tsd(metadata, embind_tsd)
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/ptah/Tools/emsdk/upstream/emscripten/tools/emscripten.py", line 638, in create_tsd
    out += create_tsd_exported_runtime_methods(metadata)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/ptah/Tools/emsdk/upstream/emscripten/tools/emscripten.py", line 620, in create_tsd_exported_runtime_methods
    js_doc += f'{definition["docs"]}\nRuntimeExports[\'{name}\'] = \n{definition["snippet"]};\n'

Failing code: emscripten.py

def create_tsd_exported_runtime_methods(metadata):
  # Use the TypeScript compiler to generate defintions for all of the runtime
  # exports. The JS from the library any JS docs are included in the file used
  # for generation.
  js_doc = 'var RuntimeExports = {};'
  for name in settings.EXPORTED_RUNTIME_METHODS:
    if name in metadata.library_definitions:
      definition = metadata.library_definitions[name]
      print(definition) # I added this print to check what happens
      js_doc += f'{definition["docs"]}\nRuntimeExports[\'{name}\'] = \n{definition["snippet"]};\n'
    else:
      js_doc += f'/** @type {{any}} */RuntimeExports[\'{name}\'];\n'
  js_doc_file = in_temp('jsdoc.js')
  tsc_output_file = in_temp('jsdoc.d.ts')
  utils.write_file(js_doc_file, js_doc)
  if shutil.which('tsc'):
    tsc = ['tsc']
  else:
    tsc = shared.get_npm_cmd('tsc')
  cmd = tsc + ['--outFile', tsc_output_file, '--declaration', '--emitDeclarationOnly', '--allowJs', js_doc_file]
  shared.check_call(cmd, cwd=path_from_root())
  return utils.read_file(tsc_output_file)

The added print(definition) shows few definitions before the error is thrown:

{'docs': '', 'snippet': '() => _emscripten_stack_get_current()'}
{'docs': '', 'snippet': '(sz) => __emscripten_stack_alloc(sz)'}
{'docs': '', 'snippet': '(val) => __emscripten_stack_restore(val)'}
{'docs': ''}

Any help would be greatly appreciated, thank you !

emscripten-core / emscripten

Web audio typescript generation failure #21835