shithub: mc

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Fix cast checks.

    We used some casting slices to intptrs when we implemented
    syscalls.

--- a/6/simp.c

+++ b/6/simp.c

@@ -933,7 +933,8 @@

             switch (t->type) {

                 /* ptr -> slice conversion is disallowed */

                 case Tyslice:

-                    if (to->type != Typtr)

+                    /* FIXME: we should only allow casting to pointers. */

+                    if (tysize(to) != Ptrsz)

                         fatal(val, "bad cast from %s to %s", tystr(exprtype(val)), tystr(to));

                     r = slicebase(s, val, NULL);

                     break;