wasm-interp --wasi --enable-threads can't handle emcc's pthread support

I suspect this is a known issue, but recording it here:

emcc will allow you to compile with -pthread, and generate nice wrapper callers for POSIX pthread calls. I'd expect that invoking with --wasi --enable-threads would allow wasm code of this form to load and run, but it fails at load time with wasi error: unknown module import: env

Looking at the wasm2wat output for my code I see only two symbols in env:

(import "env" "pthread_create" (func $pthread_create (type 7)))
(import "env" "pthread_join" (func $pthread_join (type 1)))

I presume this is a known-ish issue due to the current incomplete status of wasi support? Just wanted to note it down here for reference (and in case someone else encounters it).

Reproduce the failure using an emcc-generated module with --wasi --enable-threads, then inspect the wasm2wat output and the env imports for pthread_create and pthread_join. The issue does not name source files or tests; done means the module can load and run without the wasi error: unknown module import: env failure.