Index: head/devel/subversion/files/patch-subversion-libsvn_client-conflicts.c
===================================================================
--- head/devel/subversion/files/patch-subversion-libsvn_client-conflicts.c	(revision 479393)
+++ head/devel/subversion/files/patch-subversion-libsvn_client-conflicts.c	(revision 479394)
@@ -1,94 +1,98 @@
---- subversion/libsvn_client/conflicts.c	2018/08/30 11:27:03	1839661
-+++ subversion/libsvn_client/conflicts.c	2018/08/30 11:39:40	1839662
-@@ -1061,6 +1061,9 @@
+Upstream patch: fix automatic conflict resolution for files removed from
+the merge target when the merge source and merge target have no proper
+common ancestor.  See <https://svn.apache.org/r1839662>.
+
+--- subversion/libsvn_client/conflicts.c.orig	2018-07-12 04:00:15 UTC
++++ subversion/libsvn_client/conflicts.c
+@@ -1059,6 +1059,9 @@ find_deleted_rev(void *baton,
      {
        apr_array_header_t *moves;
  
 +      if (b->moves_table == NULL)
 +        return SVN_NO_ERROR;
 +
        moves = apr_hash_get(b->moves_table, &log_entry->revision,
                             sizeof(svn_revnum_t));
        if (moves)
-@@ -2205,8 +2208,8 @@
+@@ -2223,8 +2226,8 @@ find_operative_moves(apr_array_header_t 
   * If the node was replaced rather than deleted, set *REPLACING_NODE_KIND to
   * the node kind of the replacing node. Else, set it to svn_node_unknown.
   * Only request the log for revisions up to END_REV from the server.
 - * If the deleted node was moved, provide heads of move chains in *MOVES.
 - * If the node was not moved,set *MOVES to NULL.
 + * If MOVES it not NULL, and the deleted node was moved, provide heads of
 + * move chains in *MOVES, or, if the node was not moved, set *MOVES to NULL.
   */
  static svn_error_t *
  find_revision_for_suspected_deletion(svn_revnum_t *deleted_rev,
-@@ -2243,10 +2246,11 @@
+@@ -2261,10 +2264,11 @@ find_revision_for_suspected_deletion(svn
                                               scratch_pool));
    victim_abspath = svn_client_conflict_get_local_abspath(conflict);
  
 -  SVN_ERR(find_moves_in_revision_range(&moves_table, parent_repos_relpath,
 -                                       repos_root_url, repos_uuid,
 -                                       victim_abspath, start_rev, end_rev,
 -                                       ctx, result_pool, scratch_pool));
 +  if (moves)
 +    SVN_ERR(find_moves_in_revision_range(&moves_table, parent_repos_relpath,
 +                                         repos_root_url, repos_uuid,
 +                                         victim_abspath, start_rev, end_rev,
 +                                         ctx, result_pool, scratch_pool));
  
    url = svn_path_url_add_component2(repos_root_url, parent_repos_relpath,
                                      scratch_pool);
-@@ -2271,7 +2275,8 @@
+@@ -2289,7 +2293,8 @@ find_revision_for_suspected_deletion(svn
    b.repos_root_url = repos_root_url;
    b.repos_uuid = repos_uuid;
    b.ctx = ctx;
 -  b.moves_table = moves_table;
 +  if (moves)
 +    b.moves_table = moves_table;
    b.result_pool = result_pool;
    SVN_ERR(svn_ra__dup_session(&b.extra_ra_session, ra_session, NULL,
                                scratch_pool, scratch_pool));
-@@ -2301,7 +2306,7 @@
+@@ -2319,7 +2324,7 @@ find_revision_for_suspected_deletion(svn
      {
        struct repos_move_info *move = b.move;
  
 -      if (move)
 +      if (moves && move)
          {
            *deleted_rev = move->rev;
            *deleted_rev_author = move->rev_author;
-@@ -2319,7 +2324,8 @@
+@@ -2337,7 +2342,8 @@ find_revision_for_suspected_deletion(svn
            *deleted_rev = SVN_INVALID_REVNUM;
            *deleted_rev_author = NULL;
            *replacing_node_kind = svn_node_unknown;
 -          *moves = NULL;
 +          if (moves)
 +            *moves = NULL;
          }
        return SVN_NO_ERROR;
      }
-@@ -2328,10 +2334,11 @@
+@@ -2346,10 +2352,11 @@ find_revision_for_suspected_deletion(svn
        *deleted_rev = b.deleted_rev;
        *deleted_rev_author = b.deleted_rev_author;
        *replacing_node_kind = b.replacing_node_kind;
 -      SVN_ERR(find_operative_moves(moves, moves_table,
 -                                   b.deleted_repos_relpath, b.deleted_rev,
 -                                   ra_session, repos_root_url,
 -                                   result_pool, scratch_pool));
 +      if (moves)
 +        SVN_ERR(find_operative_moves(moves, moves_table,
 +                                     b.deleted_repos_relpath, b.deleted_rev,
 +                                     ra_session, repos_root_url,
 +                                     result_pool, scratch_pool));
      }
  
    return SVN_NO_ERROR;
-@@ -2723,7 +2730,8 @@
+@@ -2693,7 +2700,8 @@ conflict_tree_get_details_local_missing(
      end_rev = 0; /* ### We might walk through all of history... */
  
    SVN_ERR(find_revision_for_suspected_deletion(
 -            &deleted_rev, &deleted_rev_author, &replacing_node_kind, &moves,
 +            &deleted_rev, &deleted_rev_author, &replacing_node_kind,
 +            yca_loc ? &moves : NULL,
              conflict, deleted_basename, parent_repos_relpath,
              parent_peg_rev, end_rev, related_repos_relpath, related_peg_rev,
              ctx, conflict->pool, scratch_pool));