Process.run( ... ({ "stdin": "" }) ) fails

[Marcus Comstedt (ACROSS) (Hail Ilpalazzo!) @ Pike (-) developers forum]

The issue seems to come from the code

  if( res->len <= 0 )
  {
    sub_ref(res->str);
    free(res);
    return 0;
  }

(i.e. a string/slice of length zero is treated as an error) in
source_pikestring_make() in
src/post_modules/Shuffler/a_source_pikestring.c.

Before 565043fae7f the return 0 was not there, which made the code
return a freed struct instead.  That change was made over 14 years
ago...