Fix memory leaks in pg_rewind. Several PQclear() calls were missing.

Originally reported by Vladimir Borodin in the pg_rewind github project,
patch by Michael Paquier.

diff --git a/src/bin/pg_rewind/libpq_fetch.c b/src/bin/pg_rewind/libpq_fetch.c
index 1979fbcb8a5f3d5b2fb6e275250aa0638a8883eb..0e186f2c36f587f84f1385dca93a427510ccbea9 100644 (file)
--- a/src/bin/pg_rewind/libpq_fetch.c
+++ b/src/bin/pg_rewind/libpq_fetch.c
@@ -350,6 +350,8 @@ libpqGetFile(const char *filename, size_t *filesize)
    memcpy(result, PQgetvalue(res, 0, 0), len);
    result[len] = '\0';
 
+   PQclear(res);
+
    pg_log(PG_DEBUG, "fetched file \"%s\", length %d\n", filename, len);
 
    if (filesize)
@@ -410,6 +412,7 @@ libpq_executeFileMap(filemap_t *map)
    if (PQresultStatus(res) != PGRES_COMMAND_OK)
        pg_fatal("could not create temporary table: %s",
                 PQresultErrorMessage(res));
+   PQclear(res);
 
    sql = "COPY fetchchunks FROM STDIN";
    res = PQexec(conn, sql);
@@ -417,6 +420,7 @@ libpq_executeFileMap(filemap_t *map)
    if (PQresultStatus(res) != PGRES_COPY_IN)
        pg_fatal("could not send file list: %s",
                 PQresultErrorMessage(res));
+   PQclear(res);
 
    for (i = 0; i < map->narray; i++)
    {
@@ -464,6 +468,7 @@ libpq_executeFileMap(filemap_t *map)
        if (PQresultStatus(res) != PGRES_COMMAND_OK)
            pg_fatal("unexpected result while sending file list: %s",
                     PQresultErrorMessage(res));
+       PQclear(res);
    }
 
    /*