commit - a5de2633143c41b5d79b996d2b8f64df0808eaeb
commit + 10ae3a65609c50cc21f975749f15afdcdc514126
blob - b9fcc7dfe751a48b4f3febe2cda52c45cc6288f2
blob + 1d0c6fd4faa11438034964c34bfb319969e36bff
--- lib/diff_main.c
+++ lib/diff_main.c
@@ -302,8 +302,13 @@ diff_state_add_chunk(struct diff_state *state, bool so
 
 	if (!solved || state->temp_result.len) {
 		/* Append to temp_result */
-		debug("append to temp_result\n");
 		result = &state->temp_result;
+		debug("append to temp_result %p L %u  R %u\n", result,
+		      left_count, right_count);
+		debug("L\n");
+		debug_dump_atoms(&state->left, left_start, left_count);
+		debug("R\n");
+		debug_dump_atoms(&state->right, right_start, right_count);
 	} else if (!state->result->chunks.len) {
 		/* Append to final result */
 		result = &state->result->chunks;
blob - 0c983c45b9f23e0e1e04094533004da12a66192a
blob + 468ef9d7d3976ca47d6bf7a7f942dde403e501ad
--- lib/diff_patience.c
+++ lib/diff_patience.c
@@ -369,11 +369,12 @@ diff_atoms_swallow_identical_neighbors(struct diff_dat
 		if (!PATIENCE(l).unique_in_both)
 			continue;
 
-		debug("check identical lines around ");
-		debug_dump_atom(left, right, l);
+		debug("check identical lines around\n");
+		debug(" L "); debug_dump_atom(left, right, l);
 
 		unsigned int r_idx = diff_atom_idx(right, PATIENCE(l).pos_in_other);
 		r = &right->atoms.head[r_idx];
+		debug(" R "); debug_dump_atom(right, left, r);
 
 		struct diff_range identical_l;
 		struct diff_range identical_r;
@@ -583,6 +584,16 @@ diff_algo_patience(const struct diff_algo_config *algo
 			PATIENCE(atom).prev_stack = target_stack ?
 				patience_stacks[target_stack - 1] : NULL;
 
+			{
+				int xx;
+				for (xx = 0; xx < patience_stacks_count; xx++) {
+					debug(" %s%d",
+					      (xx == target_stack) ? ">" : "",
+					      diff_atom_idx(right,
+							    PATIENCE(patience_stacks[xx]).pos_in_other));
+				}
+				debug("\n");
+			}
 		}
 
 		/* backtrace through prev_stack references to form the final
@@ -607,7 +618,9 @@ diff_algo_patience(const struct diff_algo_config *algo
 	if (DEBUG) {
 		debug("\npatience LCS:\n");
 		for (i = 0; i < lcs_count; i++) {
-			debug_dump_atom(left, right, lcs[i]);
+			debug("\n L "); debug_dump_atom(left, right, lcs[i]);
+			debug(" R "); debug_dump_atom(right, left,
+						      PATIENCE(lcs[i]).pos_in_other);
 		}
 	}
 
@@ -640,6 +653,9 @@ diff_algo_patience(const struct diff_algo_config *algo
 		unsigned int left_idx;
 		unsigned int right_idx;
 
+		debug("iteration %u of %u  left_pos %u  right_pos %u\n",
+		      i, lcs_count, left_pos, right_pos);
+
 		if (i < lcs_count) {
 			atom = lcs[i];
 			atom_r = PATIENCE(atom).pos_in_other;