#184 arg used multiple times in context gives unexpected results

[Anonymous]

Just received this report by e-mail:

---
In this code parameter a and c will be on identical
address (Declared in function):

func:
%push my_context
%stacksize small
%assign %$localsize
arg a:dword,b:dword
arg c:dword

...

%pop
---

I get a syntax error on the %assign line (don't know why
it was included), but otherwise confirmed on 0.98.35,
and can't see any more recent fixes.

I'm not sure if this should work as it logically appears it
should, or generate an error. The directive is
documented as having a non-intuitive format, I know,
but obviously code that doesn't do what it looks like it
should is not a reasonable result.

[nasm64developer]

Logged In: YES
user_id=804543

In essence NASM expects the user to specify all
arguments in a single %ARG statement:

%ARG a:dword, b:dword, c:dword

Multiple %ARG statements can still be useful, to
pass union-like arguments on the stack:

%ARG type:word, d:dword
%ARG type:word, w1:word, w2:word

In other words: this is not a bug, but a feature.
Though a poorly documented one.