When parsing a corrupt record using sqlite3VdbeRecordUnpack(), make sure

that the resulting UnpackedRecord object is completely initialized, to avoid
(harmless) MSAN warnings.

FossilOrigin-Name: ddc3697efd61830fad55c6bf7f9115f4a7f53e08838eba5a82e1406c7a721665

manifest

@@ -1,5 +1,5 @@
-C Have\sfts3\signore\sempty\ssets\sof\sparenthesis\sif\sbuilt\swith\nSQLITE_ENABLE_FTS3_PARENTHESIS.
-D 2019-01-14T11:56:13.183
+C When\sparsing\sa\scorrupt\srecord\susing\ssqlite3VdbeRecordUnpack(),\smake\ssure\nthat\sthe\sresulting\sUnpackedRecord\sobject\sis\scompletely\sinitialized,\sto\savoid\n(harmless)\sMSAN\swarnings.
+D 2019-01-14T13:32:15.811
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F Makefile.in 45a3fef4d325ac0220c2172aeec4e4321da351f073f3b8e8ddea655f49ef6f2b
@@ -587,7 +587,7 @@ F src/vdbe.c 1919d490e97bfc59eab4d43444a53a6717d06137295ed684a25e5df7430d9974
 F src/vdbe.h 712bca562eaed1c25506b9faf9680bdc75fc42e2f4a1cd518d883fa79c7a4237
 F src/vdbeInt.h a76d5eed62c76bcd8de7afd3147fac1bc40c5a870582664bcd7d071ef437c37f
 F src/vdbeapi.c 57a2d794a8833f269b878dbc24e955369bdb379af6c4e93ebc5ce1a20fa3daf4
-F src/vdbeaux.c 6e8cf4dd3cf095231af8ecf3c1b986f37e0bad9d7db255d53c1ea6766af7c986
+F src/vdbeaux.c c0c3c0820cd4f85f449876a068258f0691c5dbaa5b3f9e3dfa652f56ec101578
 F src/vdbeblob.c f5c70f973ea3a9e915d1693278a5f890dc78594300cf4d54e64f2b0917c94191
 F src/vdbemem.c 7b3305bc4a5139f4536ac9b5f61da0f915e49d2e3fdfa87dfdfa9d7aba8bc1e9
 F src/vdbesort.c 90aad5a92608f2dd771c96749beabdb562c9d881131a860a7a5bccf66dc3be7f
@@ -1798,7 +1798,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P cb50509020d952fa9efed8df7fa08b07b71ae9bdbdefea216b6e660863291039
-R 513c5d5d05a7bf68768d7506be1c538c
-U dan
-Z 3cd69cc1dca89ff927ba89ca9d578a1e
+P c93c6b45a317c40eb5c0abb6620d21f5821a601632c791e11e5ce62e039eccda
+R 3507d4ff938f8a3f9aade20909b41836
+U drh
+Z 2333778276c1cc3925abbf197e14cec8

manifest.uuid

@@ -1 +1 @@
-c93c6b45a317c40eb5c0abb6620d21f5821a601632c791e11e5ce62e039eccda
+ddc3697efd61830fad55c6bf7f9115f4a7f53e08838eba5a82e1406c7a721665

src/vdbeaux.c

@@ -3818,6 +3818,13 @@ void sqlite3VdbeRecordUnpack(
     pMem++;
     if( (++u)>=p->nField ) break;
   }
+  if( d>nKey && u ){
+    assert( CORRUPT_DB );
+    /* In a corrupt record entry, the last pMem might have been set up using 
+    ** uninitialized memory. Overwrite its value with NULL, to prevent
+    ** warnings from MSAN. */
+    sqlite3VdbeMemSetNull(pMem-1);
+  }
   assert( u<=pKeyInfo->nKeyField + 1 );
   p->nField = u;
 }