Patch submitted by @ggouaillardet on ticket #1091.

bosilca · bosilca · commit 688108cf7fbc · 2015-12-02T20:42:18.000-05:00
diff --git a/ompi/mca/coll/basic/coll_basic_scan.c b/ompi/mca/coll/basic/coll_basic_scan.c
@@ -75,6 +75,7 @@ mca_coll_basic_scan_intra(const void *sbuf, void *rbuf, int count,
          * receive into, later. */
 
         dsize = opal_datatype_span(&dtype->super, count, &gap);
+        free_buffer = malloc(dsize);
         if (NULL == free_buffer) {
             return OMPI_ERR_OUT_OF_RESOURCE;
         }

Original file line number	Diff line number	Diff line change
`@@ -75,6 +75,7 @@ mca_coll_basic_scan_intra(const void sbuf, void rbuf, int count,`
`75`	`75`	`* receive into, later. */`
`76`	`76`
`77`	`77`	`dsize = opal_datatype_span(&dtype->super, count, &gap);`
	`78`	`+ free_buffer = malloc(dsize);`
`78`	`79`	`if (NULL == free_buffer) {`
`79`	`80`	`return OMPI_ERR_OUT_OF_RESOURCE;`
`80`	`81`	`}`