Do not allow the zipfile virtual table to start a transaction if no

filename has been specified.

FossilOrigin-Name: 7405e982257611803792617f5d8142c54f9831b4a030f4de8607888c525e6289

ext/misc/zipfile.c

@@ -1444,6 +1444,7 @@ static int zipfileBegin(sqlite3_vtab *pVtab){
   int rc = SQLITE_OK;
 
   assert( pTab->pWriteFd==0 );
+  if( pTab->zFile==0 ) return SQLITE_OK;
 
   /* Open a write fd on the file. Also load the entire central directory
   ** structure into memory. During the transaction any new file data is 

manifest

@@ -1,5 +1,5 @@
-C Fix\ssome\stest\slogic\sin\sthe\sOP_Delete\sopcode\sso\sthat\sit\sworks\safter\sa\ncursor-trip.
-D 2020-01-02T19:50:50.203
+C Do\snot\sallow\sthe\szipfile\svirtual\stable\sto\sstart\sa\stransaction\sif\sno\nfilename\shas\sbeen\sspecified.
+D 2020-01-02T21:30:13.891
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -325,7 +325,7 @@ F ext/misc/vfsstat.c 77b5b4235c9f7f11eddf82487c0a422944ac2f132dafd5af3be7a68a057
 F ext/misc/vtablog.c 5538acd0c8ddaae372331bee11608d76973436b77d6a91e8635cfc9432fba5ae
 F ext/misc/vtshim.c 1976e6dd68dd0d64508c91a6dfab8e75f8aaf6cd
 F ext/misc/wholenumber.c 784b12543d60702ebdd47da936e278aa03076212
-F ext/misc/zipfile.c 185d060a595c79ebbec904e9d73b97b400dca94d2f910d351d6a8b5fcfe2c3d0
+F ext/misc/zipfile.c 442bd056690ceb82a125f2be53738c721357612b3ba5d9249220d4c1f85b2e3a
 F ext/misc/zorder.c b0ff58fa643afa1d846786d51ea8d5c4b6b35aa0254ab5a82617db92f3adda64
 F ext/rbu/rbu.c 8681f6157db6adc82c34af24b14ea8a3be0146ad2a3b6c1d5da6cb8a5796c8ce
 F ext/rbu/rbu1.test 221d9c18a5e600ac9ac6b1810d99d9f99163a7909ba61597876ab6e4d4beb3d6
@@ -1749,7 +1749,7 @@ F test/wordcount.c d721a4b6fae93e6e33449700bce1686bc23257c27425bc3ef1599dc912ade
 F test/writecrash.test f1da7f7adfe8d7f09ea79b42e5ca6dcc41102f27f8e334ad71539501ddd910cc
 F test/zeroblob.test 07a5b11ab591d1f26c626945fb7f228f68b993533b2ada77273edf6ee29db174
 F test/zerodamage.test 9c41628db7e8d9e8a0181e59ea5f189df311a9f6ce99cc376dc461f66db6f8dc
-F test/zipfile.test aab99dc488586842bed415a1ce1a2327948064aa660c00243e3f14a1ff1cf282
+F test/zipfile.test 42603fac7f7d6fdb3e8690da9fd1492b89b2325b3946fcff683cc88437d84ce4
 F test/zipfile2.test 9903388a602a3834189857a985106ff95c3bba6a3969e0134127df991889db5d
 F test/zipfilefault.test 44d4d7a7f7cca7521d569d7f71026b241d65a6b1757aa409c1a168827edbbc2c
 F tool/GetFile.cs 47852aa0d806fe47ed1ac5138bdce7f000fe87aaa7f28107d0cb1e26682aeb44
@@ -1853,7 +1853,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 4fcf07f79672d203efbc90ad21d97f6a131c3885306f8e0bab015d5ac44b8644
-R 23c2d910f0f8167283a76ba9540e77df
+P 28900e5cab73f9edb9383d64a37e14fed0602966cb704ddffa60c0281698fd52
+R 03baaef710a83490f407e9d1a4367e2e
 U drh
-Z 335647452bacbb554070cabfbe244c03
+Z 36e9c165e34c3938dc7f6f92537f7688

manifest.uuid

@@ -1 +1 @@
-28900e5cab73f9edb9383d64a37e14fed0602966cb704ddffa60c0281698fd52
+7405e982257611803792617f5d8142c54f9831b4a030f4de8607888c525e6289

test/zipfile.test

@@ -834,6 +834,11 @@ do_execsql_test 15.20 {
   REPLACE INTO t2 values(null,null,null,null,null,10,null);
 } {}
 
+# 2020-01-02 Yongheng fuzzer discovery
+#
+do_catchsql_test 16.10 {
+  DELETE FROM zipfile;
+} {1 {zipfile() function requires an argument}}
 
 
 finish_test