tac: do not let failed allocation cause immediate exit

* src/tac.c (temp_stream): Don't exit immediately upon failed heap
allocation, here.  That would inhibit processing of any additional
command-line arguments.

1 files changed, 6 insertions, 1 deletions

diff --git a/src/tac.c b/src/tac.c
index 6a7e51081..7cc562e91 100644
--- a/src/tac.c
+++ b/src/tac.c
@@ -430,7 +430,12 @@ temp_stream (FILE **fp, char **file_name)
     {
       char const *t = getenv ("TMPDIR");
       char const *tempdir = t ? t : DEFAULT_TMPDIR;
-      tempfile = file_name_concat (tempdir, "tacXXXXXX", NULL);
+      tempfile = mfile_name_concat (tempdir, "tacXXXXXX", NULL);
+      if (tempdir == NULL)
+        {
+          error (0, 0, _("memory exhausted"));
+          return false;
+        }
 
       /* FIXME: there's a small window between a successful mkstemp call
          and the unlink that's performed by record_or_unlink_tempfile.