[nasm:master] preproc: Fix the token iterator in expanding single-line macro

[nasm-bot f. C. S. B. <cha...@in...>]

Commit-ID:  51fd5a506723e756d306228cacba47e0a88b50e1
Gitweb:     http://repo.or.cz/w/nasm.git?a=commitdiff;h=51fd5a506723e756d306228cacba47e0a88b50e1
Author:     Chang S. Bae <cha...@in...>
AuthorDate: Thu, 6 Feb 2020 14:39:22 -0800
Committer:  Chang S. Bae <cha...@in...>
CommitDate: Wed, 1 Apr 2020 15:41:38 -0700

preproc: Fix the token iterator in expanding single-line macro

The code used to stuck in going through whitespace tokens.
Fix to increment towards on the next in the loop.

Reported-by: C. Masloch <pu...@ul...>
Link: https://bugzilla.nasm.us/show_bug.cgi?id=3392630
Suggested-by: C. Masloch <pu...@ul...>
Signed-off-by: Chang S. Bae <cha...@in...>


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

diff --git a/asm/preproc.c b/asm/preproc.c
index f94d9558..befe77e8 100644
--- a/asm/preproc.c
+++ b/asm/preproc.c
@@ -5379,8 +5379,10 @@ static SMacro *expand_one_smacro(Token ***tpp)
             Token *endt = tline;
 
             tline = t;
-            while (!cond_comma && t && t != endt)
+            while (!cond_comma && t && t != endt) {
                 cond_comma = t->type != TOK_WHITESPACE;
+                t = t->next;
+            }
         }
 
         if (tnext) {