Do not allow an empty table bypass to jump outside of a right-join body

subroutine.

FossilOrigin-Name: 1549dcd2353903b70abadd428eeef971ab940df04fb05a6b83b04ee30932db6d

manifest

@@ -1,5 +1,5 @@
-C Fix\sthe\ssqlite3SrcListAppendList()\sroutine\sso\sthat\sit\scorrectly\sadds\nthe\sJT_LTORJ\sattribute\sto\sthe\sfirst\sSrcItem,\sif\sneeded.
+C Do\snot\sallow\san\sempty\stable\sbypass\sto\sjump\soutside\sof\sa\sright-join\sbody\nsubroutine.
-D 2022-04-18T10:09:29.854
+D 2022-04-18T10:26:50.482
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -641,7 +641,7 @@ F src/wal.h c3aa7825bfa2fe0d85bef2db94655f99870a285778baa36307c0a16da32b226a
 F src/walker.c f890a3298418d7cba3b69b8803594fdc484ea241206a8dfa99db6dd36f8cbb3b
 F src/where.c 45102d682f6efd450d89c0c5f09b838be6d69c84c6105336730ee38d3b452fad
 F src/whereInt.h eecce79edc6f7005f91f35be6b18b7053f794e1b50e95bcd06a2d537fc176734
-F src/wherecode.c cb747d628e8fdc0396529c07be9c772c2978016a723eba9c3329f8ef5e4411f1
+F src/wherecode.c 4e03f17f8e7b89b9f85d14d705944acf0b0adff3de47753bdd99cf98b0142997
 F src/whereexpr.c 174d4ad5be165c610c907abb779ef4a97974d22b84e1ce7898d2d9f6947249e5
 F src/window.c 42a71595263dbd8ef8248218e4fc7d4b5ddccece52146ad48e079342d93f6f8f
 F test/8_3_names.test ebbb5cd36741350040fd28b432ceadf495be25b2
@@ -1147,7 +1147,7 @@ F test/join4.test 1a352e4e267114444c29266ce79e941af5885916
 F test/join5.test c4df54e2e204d7f1417bfbdd21ca324b4b07415c647595cc47798eacfddc96d3
 F test/join6.test f809c025fa253f9e150c0e9afd4cef8813257bceeb6f46e04041228c9403cc2c
 F test/join7.test e5c9b1b729d7e1d0b4195e99833e0ff0cf2d88e7fdd32b49af1044f4c76f72d9
-F test/join8.test 4f085a233582724be035e83100f458c4cfdd8101699c27feac2782242c037682
+F test/join8.test 8a4cea60cc57ad95f0c718f460d86a7a239fbb50eaf2fa37b66d5f195f40220c
 F test/join9.test afd899f0bda3db6d5fefae2275ad91802d056c7dcd109030100b87e0b75f47ff
 F test/journal1.test c7b768041b7f494471531e17abc2f4f5ebf9e5096984f43ed17c4eb80ba34497
 F test/journal2.test 9dac6b4ba0ca79c3b21446bbae993a462c2397c4
@@ -1948,8 +1948,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 0ccb224e13ad44c7e1a3aa186821a929faabc0075fe15799476c00d9a92e9d91
+P 07ed0dca310d828f9fe152efa8ee2a89202771a8f661afa1dbeee34aaabef67a
-R 868a3abe5b71496a81ccd2968e4bc123
+R a87b222d27880866b7dfd28f3fc0e49d
 U drh
-Z 4d37f6a11fcac66c4ed7fb866c6b8bbc
+Z 6dba88c851bb0b27e425f682c55f1888
 # Remove this line to create a well-formed Fossil manifest.

manifest.uuid

@@ -1 +1 @@
-07ed0dca310d828f9fe152efa8ee2a89202771a8f661afa1dbeee34aaabef67a
+1549dcd2353903b70abadd428eeef971ab940df04fb05a6b83b04ee30932db6d

src/wherecode.c

@@ -1516,7 +1516,10 @@ Bitmask sqlite3WhereCodeOneLoopStart(
 
   /* Compute a safe address to jump to if we discover that the table for
   ** this loop is empty and can never contribute content. */
-  for(j=iLevel; j>0 && pWInfo->a[j].iLeftJoin==0; j--){}
+  for(j=iLevel; j>0; j--){
+    if( pWInfo->a[j].iLeftJoin ) break;
+    if( pWInfo->a[j].pRJ ) break;
+  }
   addrHalt = pWInfo->a[j].addrBrk;
 
   /* Special case of a FROM clause subquery implemented as a co-routine */

test/join8.test

@@ -35,20 +35,22 @@ do_execsql_test join8-10 {
 #
 do_test join8-issue-1 {set rc "Issue-1 'row-value subroutine' unresolved"} {}
 
-# Pending issue #2:
+# Pending issue #2: (now resolved)
 # Jump to addrHalt inside the RIGHT JOIN body subroutine bypasses the
 # OP_Return, resulting in a subroutine loop.  Test case:
 #
-# CREATE TABLE t1(a int, b int, c int);
+reset_db
-# INSERT INTO t1 VALUES(1,2,3),(4,5,6);
+do_execsql_test join8-2000 {
-# CREATE TABLE t2(d int, e int);
+  CREATE TABLE t1(a int, b int, c int);
-# INSERT INTO t2 VALUES(3,333),(4,444);
+  INSERT INTO t1 VALUES(1,2,3),(4,5,6);
-# CREATE TABLE t3(f int, g int);
+  CREATE TABLE t2(d int, e int);
-# PRAGMA automatic_index=off;
+  INSERT INTO t2 VALUES(3,333),(4,444);
-# .eqp trace
+  CREATE TABLE t3(f int, g int);
-# SELECT * FROM t1 RIGHT JOIN t2 ON c=d JOIN t3 ON f=e;
+  PRAGMA automatic_index=off;
-#
+} {}
-do_test join8-issue-2 {set rc "Issue-2 'jump to addrHalt' unresolved"} {}
+do_catchsql_test join8-2010 {
+  SELECT * FROM t1 RIGHT JOIN t2 ON c=d JOIN t3 ON f=e;
+} {0 {}}
 
 # Demonstrate that nested FULL JOINs and USING clauses work
 #