From 84e30ca0ed0953a6b838d5c86e1105dd497f3ac8 Mon Sep 17 00:00:00 2001
From: drh <drh@noemail.net>
Date: Thu, 10 Feb 2011 17:46:14 +0000
Subject: [PATCH] Prevent a segfault when automatic indices try to use a column
 with an unknown collating function.  Ticket [77aa3b1e6592582e38605d36].  This
 check-in also removes some stray \r characters unrelated to the problem.

FossilOrigin-Name: f01030a0df4f94f886ab209ee8766b095da28c1e
---
 manifest      | 20 ++++++++++----------
 manifest.uuid |  2 +-
 src/expr.c    |  6 +++---
 src/where.c   |  3 ++-
 4 files changed, 16 insertions(+), 15 deletions(-)

diff --git a/manifest b/manifest
index 410f03eb5d..962d259cbb 100644
--- a/manifest
+++ b/manifest
@@ -1,8 +1,8 @@
 -----BEGIN PGP SIGNED MESSAGE-----
 Hash: SHA1
 
-C Refactor\sthe\scost\sfunction\sin\sthe\squery\splanner.\s\sGive\sextra\scost\s(thus\nreduce\slikelihood\sof\sselection)\sto\sfull\stable\sscans.
-D 2011-02-10T00:08:47.701
+C Prevent\sa\ssegfault\swhen\sautomatic\sindices\stry\sto\suse\sa\scolumn\swith\san\nunknown\scollating\sfunction.\s\sTicket\s[77aa3b1e6592582e38605d36].\s\sThis\ncheck-in\salso\sremoves\ssome\sstray\s\\r\scharacters\sunrelated\sto\sthe\sproblem.
+D 2011-02-10T17:46:14.555
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
 F Makefile.in 27701a1653595a1f2187dc61c8117e00a6c1d50f
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -132,7 +132,7 @@ F src/complete.c dc1d136c0feee03c2f7550bafc0d29075e36deac
 F src/ctime.c 7deec4534f3b5a0c3b4a4cbadf809d321f64f9c4
 F src/date.c 1548fdac51377e4e7833251de878b4058c148e1b
 F src/delete.c 7ed8a8c8b5f748ece92df173d7e0f7810c899ebd
-F src/expr.c 9b02a6dc3c7b97be01619674abebb59ed8830f1d
+F src/expr.c 400e27db545e0d8b3b18043363294b525596f507
 F src/fault.c 160a0c015b6c2629d3899ed2daf63d75754a32bb
 F src/fkey.c 17950a28f28b23e8ad3feaac5fc88c324d2f600a
 F src/func.c cb41f614edc43b00bfeb030f9768e80eaff47edd
@@ -244,7 +244,7 @@ F src/vtab.c b297e8fa656ab5e66244ab15680d68db0adbec30
 F src/wal.c aca10a60655e103fc8630a75345000f43c6d47ca
 F src/wal.h 7a5fbb00114b7f2cd40c7e1003d4c41ce9d26840
 F src/walker.c 3112bb3afe1d85dc52317cb1d752055e9a781f8f
-F src/where.c 83a89fe4822caf45391459224891b66d3e2ba237
+F src/where.c ebecb7b9e08cf1c0bf84bbc26756ff09e9479f08
 F test/aggerror.test a867e273ef9e3d7919f03ef4f0e8c0d2767944f2
 F test/alias.test 4529fbc152f190268a15f9384a5651bbbabc9d87
 F test/all.test 51756962d522e474338e9b2ebb26e7364d4aa125
@@ -909,14 +909,14 @@ F tool/speedtest2.tcl ee2149167303ba8e95af97873c575c3e0fab58ff
 F tool/speedtest8.c 2902c46588c40b55661e471d7a86e4dd71a18224
 F tool/speedtest8inst1.c 293327bc76823f473684d589a8160bde1f52c14e
 F tool/vdbe-compress.tcl d70ea6d8a19e3571d7ab8c9b75cba86d1173ff0f
-P 7cc515edc9cade2bc6c74699b3e4153bf2b74ebb
-R 08fe91f055ce4403c87684038df163cb
+P 878da276ebf643b716ddd650d4d0ca3595fe5bf2
+R 7115e9b9167d54b1bd5babaa217ab874
 U drh
-Z 1ef92ed18aa7502ebbef18dbb05b7e9d
+Z a8209f45d500942f895f6428366345d2
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.6 (GNU/Linux)
 
-iD8DBQFNUyyToxKgR168RlERAiF4AKCIVGuKzORossDsmQaAQbZKU4Xd/gCfWOhI
-4aKFZ+7oNbX7dj0deyXznl8=
-=Ts3F
+iD8DBQFNVCRpoxKgR168RlERAt6wAJoDNGsC+YrJposBo+/cLnxCnBAN3gCfbqz3
+zSgAQldrrpVNMc5IxEfC5AM=
+=muXT
 -----END PGP SIGNATURE-----
diff --git a/manifest.uuid b/manifest.uuid
index 9097819203..96301c157d 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-878da276ebf643b716ddd650d4d0ca3595fe5bf2
\ No newline at end of file
+f01030a0df4f94f886ab209ee8766b095da28c1e
\ No newline at end of file
diff --git a/src/expr.c b/src/expr.c
index 8c68d9d658..f624133428 100644
--- a/src/expr.c
+++ b/src/expr.c
@@ -92,7 +92,7 @@ Expr *sqlite3ExprSetCollByToken(Parse *pParse, Expr *pExpr, Token *pCollName){
 CollSeq *sqlite3ExprCollSeq(Parse *pParse, Expr *pExpr){
   CollSeq *pColl = 0;
   Expr *p = pExpr;
-  while( ALWAYS(p) ){
+  while( p ){
     int op;
     pColl = p->pColl;
     if( pColl ) break;
@@ -3251,7 +3251,7 @@ void sqlite3ExprIfTrue(Parse *pParse, Expr *pExpr, int dest, int jumpIfNull){
       exprCodeBetween(pParse, pExpr, dest, 1, jumpIfNull);
       break;
     }
-#ifndef SQLITE_OMIT_SUBQUERY
+#ifndef SQLITE_OMIT_SUBQUERY
     case TK_IN: {
       int destIfFalse = sqlite3VdbeMakeLabel(v);
       int destIfNull = jumpIfNull ? dest : destIfFalse;
@@ -3394,7 +3394,7 @@ void sqlite3ExprIfFalse(Parse *pParse, Expr *pExpr, int dest, int jumpIfNull){
       exprCodeBetween(pParse, pExpr, dest, 0, jumpIfNull);
       break;
     }
-#ifndef SQLITE_OMIT_SUBQUERY
+#ifndef SQLITE_OMIT_SUBQUERY
     case TK_IN: {
       if( jumpIfNull ){
         sqlite3ExprCodeIN(pParse, pExpr, dest, dest);
diff --git a/src/where.c b/src/where.c
index d3356cee78..2fc0a80feb 100644
--- a/src/where.c
+++ b/src/where.c
@@ -1882,7 +1882,8 @@ static void constructAutomaticIndex(
         idxCols |= cMask;
         pIdx->aiColumn[n] = pTerm->u.leftColumn;
         pColl = sqlite3BinaryCompareCollSeq(pParse, pX->pLeft, pX->pRight);
-        pIdx->azColl[n] = pColl->zName;
+        assert( pColl!=0 || pParse->nErr>0 );
+        pIdx->azColl[n] = pColl ? pColl->zName : "BINARY";
         n++;
       }
     }