From 09aad0efecdc4dea8a09b16976ec9639a6f97655 Mon Sep 17 00:00:00 2001
From: lemon <lsof@mailbox.org>
Date: Sat, 15 Nov 2025 20:10:31 +0100
Subject: c: disallow void arguments

---
 c/c.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'c/c.c')

diff --git a/c/c.c b/c/c.c
index fc6bcc0..d2d842d 100644
--- a/c/c.c
+++ b/c/c.c
@@ -684,7 +684,9 @@ callexpr(struct comp *cm, const struct span *span_, const struct expr *callee)
          error(&arg.span, "too many args to function taking %d params", td->nmemb);
          printsig = 1;
       }
-      if (td && args.n < td->nmemb && !td->kandr) {
+      if (arg.ty.t == TYVOID) {
+         error(&arg.span, "invalid use of void expression");
+      } else if (td && args.n < td->nmemb && !td->kandr) {
          if (!assigncheck(td->param[args.n], &arg)) {
             error(&arg.span, "arg #%d of type '%ty' is incompatible with '%ty'",
                   args.n+1, arg.ty, td->param[args.n]);
-- 
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