t7001: add test case for --dry-run

diff --git a/strbuf.c b/strbuf.c
index 89d22e3b0903a220fa958b8d912607828ab2a9ba..323c49ceb35cb053434248df869578e649ccadc0 100644 (file)
--- a/strbuf.c
+++ b/strbuf.c
@@ -476,6 +476,7 @@ int strbuf_getwholeline(struct strbuf *sb, FILE *fp, int term)
        /* Translate slopbuf to NULL, as we cannot call realloc on it */
        if (!sb->alloc)
                sb->buf = NULL;
+       errno = 0;
        r = getdelim(&sb->buf, &sb->alloc, term, fp);
 
        if (r > 0) {