From c14321c4d35549d989d614437953b36b8c771cc2 Mon Sep 17 00:00:00 2001
From: lemon <lsof@mailbox.org>
Date: Mon, 1 Dec 2025 19:10:53 +0100
Subject: c: make tentative definitions work

---
 ir/builder.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'ir')

diff --git a/ir/builder.c b/ir/builder.c
index 4b25329..ee83961 100644
--- a/ir/builder.c
+++ b/ir/builder.c
@@ -214,7 +214,7 @@ useblk(struct function *fn, struct block *blk)
    extern int nerror;
    if (fn->curblk && nerror == 0) assert(fn->curblk->jmp.t && "never finished block");
    if (blk) assert(!blk->jmp.t && "reusing built block");
-   if (!blk->lprev) { /* initialize */
+   if (blk && !blk->lprev) { /* initialize */
       blk->lnext = fn->entry;
       blk->lprev = fn->entry->lprev;
       blk->lprev->lnext = blk;
-- 
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