Index: src/insert.c
==================================================================
--- src/insert.c
+++ src/insert.c
@@ -1637,11 +1637,12 @@
   if( pDest->tabFlags & TF_Virtual ){
     return 0;   /* tab1 must not be a virtual table */
   }
 #endif
   if( onError==OE_Default ){
-    onError = OE_Abort;
+    if( pDest->iPKey>=0 ) onError = pDest->keyConf;
+    if( onError==OE_Default ) onError = OE_Abort;
   }
   if( onError!=OE_Abort && onError!=OE_Rollback ){
     return 0;   /* Cannot do OR REPLACE or OR IGNORE or OR FAIL */
   }
   assert(pSelect->pSrc);   /* allocated even if there is no FROM clause */

Index: test/insert4.test
==================================================================
--- test/insert4.test
+++ test/insert4.test
@@ -383,7 +383,126 @@
   } {123}
   do_test insert4-7.8 {
     set ::sqlite3_xferopt_count
   } {1}
 }
+
+# Ticket [676bc02b87176125635cb174d110b431581912bb]
+# Make sure INTEGER PRIMARY KEY ON CONFLICT ... works with the xfer
+# optimization.
+#
+do_test insert4-8.1 {
+  execsql {
+    DROP TABLE IF EXISTS t1;
+    DROP TABLE IF EXISTS t2;
+    CREATE TABLE t1(a INTEGER PRIMARY KEY ON CONFLICT REPLACE, b);
+    CREATE TABLE t2(x INTEGER PRIMARY KEY ON CONFLICT REPLACE, y);
+    INSERT INTO t1 VALUES(1,2);
+    INSERT INTO t2 VALUES(1,3);
+    INSERT INTO t1 SELECT * FROM t2;
+    SELECT * FROM t1;
+  }
+} {1 3}
+do_test insert4-8.2 {
+  execsql {
+    DROP TABLE IF EXISTS t1;
+    DROP TABLE IF EXISTS t2;
+    CREATE TABLE t1(a INTEGER PRIMARY KEY ON CONFLICT REPLACE, b);
+    CREATE TABLE t2(x, y);
+    INSERT INTO t1 VALUES(1,2);
+    INSERT INTO t2 VALUES(1,3);
+    INSERT INTO t1 SELECT * FROM t2;
+    SELECT * FROM t1;
+  }
+} {1 3}
+do_test insert4-8.3 {
+  execsql {
+    DROP TABLE IF EXISTS t1;
+    DROP TABLE IF EXISTS t2;
+    CREATE TABLE t1(a INTEGER PRIMARY KEY ON CONFLICT IGNORE, b);
+    CREATE TABLE t2(x INTEGER PRIMARY KEY ON CONFLICT IGNORE, y);
+    INSERT INTO t1 VALUES(1,2);
+    INSERT INTO t2 VALUES(1,3);
+    INSERT INTO t1 SELECT * FROM t2;
+    SELECT * FROM t1;
+  }
+} {1 2}
+do_test insert4-8.4 {
+  execsql {
+    DROP TABLE IF EXISTS t1;
+    DROP TABLE IF EXISTS t2;
+    CREATE TABLE t1(a INTEGER PRIMARY KEY ON CONFLICT IGNORE, b);
+    CREATE TABLE t2(x, y);
+    INSERT INTO t1 VALUES(1,2);
+    INSERT INTO t2 VALUES(1,3);
+    INSERT INTO t1 SELECT * FROM t2;
+    SELECT * FROM t1;
+  }
+} {1 2}
+do_test insert4-8.5 {
+  execsql {
+    DROP TABLE IF EXISTS t1;
+    DROP TABLE IF EXISTS t2;
+    CREATE TABLE t1(a INTEGER PRIMARY KEY ON CONFLICT FAIL, b);
+    CREATE TABLE t2(x INTEGER PRIMARY KEY ON CONFLICT FAIL, y);
+    INSERT INTO t1 VALUES(1,2);
+    INSERT INTO t2 VALUES(-99,100);
+    INSERT INTO t2 VALUES(1,3);
+    SELECT * FROM t1;
+  }
+  catchsql {
+    INSERT INTO t1 SELECT * FROM t2;
+  }
+} {1 {PRIMARY KEY must be unique}}
+do_test insert4-8.6 {
+  execsql {
+    SELECT * FROM t1;
+  }
+} {-99 100 1 2} 
+do_test insert4-8.7 {
+  execsql {
+    DROP TABLE IF EXISTS t1;
+    DROP TABLE IF EXISTS t2;
+    CREATE TABLE t1(a INTEGER PRIMARY KEY ON CONFLICT ABORT, b);
+    CREATE TABLE t2(x INTEGER PRIMARY KEY ON CONFLICT ABORT, y);
+    INSERT INTO t1 VALUES(1,2);
+    INSERT INTO t2 VALUES(-99,100);
+    INSERT INTO t2 VALUES(1,3);
+    SELECT * FROM t1;
+  }
+  catchsql {
+    INSERT INTO t1 SELECT * FROM t2;
+  }
+} {1 {PRIMARY KEY must be unique}}
+do_test insert4-8.8 {
+  execsql {
+    SELECT * FROM t1;
+  }
+} {1 2} 
+do_test insert4-8.9 {
+  execsql {
+    DROP TABLE IF EXISTS t1;
+    DROP TABLE IF EXISTS t2;
+    CREATE TABLE t1(a INTEGER PRIMARY KEY ON CONFLICT ROLLBACK, b);
+    CREATE TABLE t2(x INTEGER PRIMARY KEY ON CONFLICT ROLLBACK, y);
+    INSERT INTO t1 VALUES(1,2);
+    INSERT INTO t2 VALUES(-99,100);
+    INSERT INTO t2 VALUES(1,3);
+    SELECT * FROM t1;
+  }
+  catchsql {
+    BEGIN;
+    INSERT INTO t1 VALUES(2,3);
+    INSERT INTO t1 SELECT * FROM t2;
+  }
+} {1 {PRIMARY KEY must be unique}}
+do_test insert4-8.10 {
+  catchsql {COMMIT}
+} {1 {cannot commit - no transaction is active}}
+do_test insert4-8.11 {
+  execsql {
+    SELECT * FROM t1;
+  }
+} {1 2} 
+
 
 finish_test