cgraph concat: fix unchecked allocation failure

diff --git a/lib/cgraph/grammar.y b/lib/cgraph/grammar.y
index 943ba27838a94fea2c63c2afd6a31936b55e3620..800a99779987827c6795c7bef0c7f9305cb2eb10 100644 (file)
--- a/lib/cgraph/grammar.y
+++ b/lib/cgraph/grammar.y
@@ -21,6 +21,7 @@
 #include <stdbool.h>
 #include <stdio.h>
 #include <cghdr.h>
+#include <cgraph/alloc.h>
 #include <cgraph/unreachable.h>
 #include <stddef.h>
 extern void aagerror(const char*);
@@ -437,7 +438,7 @@ concat (char* s1, char* s2)
   size_t len = strlen(s1) + strlen(s2) + 1;
 
   if (len <= BUFSIZ) sym = buf;
-  else sym = malloc(len);
+  else sym = gv_alloc(len);
   strcpy(sym,s1);
   strcat(sym,s2);
   s = agstrdup (G,sym);