From 2429629e3b2673e21e5d4cf54fdc1c3eacab1679 Mon Sep 17 00:00:00 2001
From: tbeu <tbeu@users.noreply.github.com>
Date: Tue, 24 Oct 2017 17:44:51 +0200
Subject: [PATCH] Fix usage after release (as reported by PVS-Studio)

V774 The '(char *) buf' pointer was used after the memory was released. tpl.c 1027
---
 src/tpl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/tpl.c b/src/tpl.c
index 0cc2788..e37b052 100644
--- a/src/tpl.c
+++ b/src/tpl.c
@@ -1021,13 +1021,13 @@ TPL_API int tpl_dump(tpl_node *r, int mode, ...) {
             } else if (rc == -1) {
                 if (errno == EINTR || errno == EAGAIN) continue;
                 tpl_hook.oops("error writing to fd %d: %s\n", fd, strerror(errno));
-                free(buf);
                 /* attempt to rewind partial write to a regular file */
                 if (fstat(fd,&sbuf) == 0 && S_ISREG(sbuf.st_mode)) {
                   if (ftruncate(fd,sbuf.st_size - (bufv-(char*)buf)) == -1) {
                     tpl_hook.oops("can't rewind: %s\n", strerror(errno));
                   }
                 }
+                free(buf);
                 return -1;
             }
         } while (sz > 0);