wasmtime wasi path_open issue

output.sh

$ env RUST_LOG=wasmtime_wasi=trace wasmtime -d --dir=/ ./stepA_mal.wasm
 TRACE wasmtime_wasi::syscalls > args_sizes_get(argc=0x8a4, argv_buf_size=0x8ac)
 TRACE wasmtime_wasi::syscalls >      | *argc=1
 TRACE wasmtime_wasi::syscalls >      | *argv_buf_size=15
 TRACE wasmtime_wasi::syscalls >     -> errno=__WASI_ESUCCESS
 TRACE wasmtime_wasi::syscalls > args_get(argv=0x8b4, argv_buf=0x8b8)
 TRACE wasmtime_wasi::syscalls >     -> errno=__WASI_ESUCCESS
 TRACE wasmtime_wasi::syscalls > fd_write(fd=1, iovs=0x834, iovs_len=1, nwritten=0x82c)
Mal [WebAssembly]
 TRACE wasmtime_wasi::syscalls >      | *nwritten=18
 TRACE wasmtime_wasi::syscalls >     -> errno=__WASI_ESUCCESS
 TRACE wasmtime_wasi::syscalls > fd_write(fd=1, iovs=0x834, iovs_len=1, nwritten=0x82c)
user>  TRACE wasmtime_wasi::syscalls >      | *nwritten=6
 TRACE wasmtime_wasi::syscalls >     -> errno=__WASI_ESUCCESS
 TRACE wasmtime_wasi::syscalls > fd_read(fd=0, iovs=0x848, iovs_len=1, nread=0x840)
(slurp "/etc/resolv.conf") 
 TRACE wasmtime_wasi::syscalls >      | *nread=27
 TRACE wasmtime_wasi::syscalls >     -> errno=__WASI_ESUCCESS
 TRACE wasmtime_wasi::syscalls > path_open(dirfd=3, dirflags=1, path=0x102933, path_len=16, oflags=0x0, fs_rights_base=0x2, fs_rights_inheriting=0x2, fs_flags=0x0, fd=0x854)
 TRACE wasmtime_wasi::syscalls >      | (path,path_len)=Ok("/etc/resolv.conf")
 TRACE wasmtime_wasi::syscalls >      | *fd=0
 TRACE wasmtime_wasi::syscalls >     -> errno=__WASI_ENOTCAPABLE
 TRACE wasmtime_wasi::syscalls > fd_write(fd=1, iovs=0x834, iovs_len=1, nwritten=0x82c)
Failed to open file
 TRACE wasmtime_wasi::syscalls >      | *nwritten=20
 TRACE wasmtime_wasi::syscalls >     -> errno=__WASI_ESUCCESS
 TRACE wasmtime_wasi::syscalls > proc_exec(rval=2)