Fix a bug in CTE handling discovered by LibFuzzer that can cause an infinite loop...

FossilOrigin-Name: 088009efdd56160bb4eee0fbd829a529b141274e

diff --cc manifest
index 782863019bb33593fb7e64a060590d88227d68bb,b8a59cb2c66a2948b92e8ee37ac716751c058f0f..b2a16a73948f103644f53fe6ea3d79f245314020
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C The\sOPFLAG_SEEKEQ\soptimization\sis\sonly\sapplicable\sto\sequality\scomparisons\nagainst\san\sindex,\snot\sagainst\sa\srowid\stable.
- D 2015-11-07T01:19:00.997
 -C Add\stest\scases\sfor\sWITH\sclauses.
 -D 2015-11-07T17:51:39.619
++C Fix\sa\sbug\sin\sCTE\shandling\sdiscovered\sby\sLibFuzzer\sthat\scan\scause\san\sinfinite\sloop\sin\sthe\squery\splanner.
++D 2015-11-07T18:07:15.260
  F Makefile.in 3a705bb4bd12e194212ddbdbf068310d17153cdb
  F Makefile.linux-gcc 7bc79876b875010e8c8f9502eb935ca92aa3c434
  F Makefile.msc 702d3e98f3afc6587a78481257f3c4c900efc3a4
@@@ -1400,7 -1401,7 +1401,8 @@@ F tool/vdbe_profile.tcl 246d0da094856d7
  F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
  F tool/warnings.sh 48bd54594752d5be3337f12c72f28d2080cb630b
  F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
- P dd9a26ecdeaef7b0b9cbf4ff70448ab13a276b4e
- R 37fd8f25666e5cc61c467cdb94b7bb71
- U drh
- Z b3bf4f06c783a2156de71d3cb1963976
 -P 028475cb17a4b50baf0e9aba9bd3403d0a5d03b0
++P 0f5b147d1fe83c34d0fbeacc7422be94d8441bc1 e7e65c7559ed43e7065adc2ec1bd242bf187b7c3
+ R 0a66e1cb90e0f88ea5b94da656f84e5f
++T +closed e7e65c7559ed43e7065adc2ec1bd242bf187b7c3
+ U dan
 -Z 560670311488774642220bf984dfc3d3
++Z 97f5561994d709cf0287df4980640bc9

diff --cc manifest.uuid
index f7a057f393aabee2cf6f57abf6df920f928839ab,c4a678277c9dc3647923ac2d62e1f5648de008c5..576eda30afa3f5c98e54e1c8a0566251d1e45acd
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- 0f5b147d1fe83c34d0fbeacc7422be94d8441bc1
 -e7e65c7559ed43e7065adc2ec1bd242bf187b7c3
++088009efdd56160bb4eee0fbd829a529b141274e