From 4afa02a44f220dfc3521a404c30198b644ffc518 Mon Sep 17 00:00:00 2001
From: nick black <dankamongmen@gmail.com>
Date: Thu, 26 Mar 2020 00:10:22 -0400
Subject: [PATCH] Tetris: clear out lines #421

---
 src/tetris/lock.h | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/tetris/lock.h b/src/tetris/lock.h
index 9e5e707ba..2c61a3ed0 100644
--- a/src/tetris/lock.h
+++ b/src/tetris/lock.h
@@ -22,7 +22,7 @@ void LockPiece(){
     }
     cleared = 0;
     int y;
-    for(y = bdimy - 2 ; y > 0 ; --y){
+    for(y = bdimy - 2 ; y > 0 ; --y){ // get the lowest cleared area
       if(LineClear(y)){
         ++cleared;
       }else if(cleared){
@@ -36,7 +36,11 @@ void LockPiece(){
           if(board_->get_at(dy, x, &c) < 0){
             throw TetrisNotcursesErr("get_at()");
           }
-          if(board_->putc(dy + 1, x, &c) < 0){
+          if(board_->putc(dy + cleared, x, &c) < 0){
+            throw TetrisNotcursesErr("putc()");
+          }
+          c.get().gcluster = 0;
+          if(board_->putc(dy, x, &c) < 0){
             throw TetrisNotcursesErr("putc()");
           }
         }