On Thu, Mar 16, 2017 at 12:18 AM, Alvaro Herrera
<alvhe...@2ndquadrant.com> wrote:
> Peter Eisentraut wrote:
>> Remove objname/objargs split for referring to objects
>
> I don't know if this is the guilty commit, but I'm now getting these
> compiler warnings:
>
>
> /pgsql/source/master/src/backend/catalog/objectaddress.c: In function 
> 'get_object_address':
> /pgsql/source/master/src/backend/catalog/objectaddress.c:1624:33: warning: 
> 'typenames[1]' may be used uninitialized in this function 
> [-Wmaybe-uninitialized]
>        ereport(ERROR,
>                                  ^
> /pgsql/source/master/src/backend/catalog/objectaddress.c:1578:8: note: 
> 'typenames[1]' was declared here
>   char    *typenames[2];
>         ^
> /pgsql/source/master/src/backend/catalog/objectaddress.c:1624:33: warning: 
> 'typenames[0]' may be used uninitialized in this function 
> [-Wmaybe-uninitialized]
>        ereport(ERROR,
>                                  ^
> /pgsql/source/master/src/backend/catalog/objectaddress.c:1578:8: note: 
> 'typenames[0]' was declared here
>   char    *typenames[2];
>         ^

What are you using as CFLAGS? As both typenames should be normally
set, what about initializing those fields with NULL and add an
assertion like the attached?
-- 
Michael
diff --git a/src/backend/catalog/objectaddress.c b/src/backend/catalog/objectaddress.c
index 3a7f049247..52df94439d 100644
--- a/src/backend/catalog/objectaddress.c
+++ b/src/backend/catalog/objectaddress.c
@@ -1552,7 +1552,7 @@ get_object_address_opf_member(ObjectType objtype,
 	ObjectAddress address;
 	ListCell   *cell;
 	List	   *copy;
-	char	   *typenames[2];
+	char	   *typenames[2] = {NULL, NULL};
 	Oid			typeoids[2];
 	int			membernum;
 	int			i;
@@ -1581,6 +1581,8 @@ get_object_address_opf_member(ObjectType objtype,
 			break;
 	}
 
+	Assert(typenames[0] != NULL && typenames[1] != NULL);
+
 	switch (objtype)
 	{
 		case OBJECT_AMOP:
-- 
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