Make sure temporary sqlite3_value objects used by STAT4 are reset to NULL prior

to being reused, to prevent a memory leak associated with
the custom xDel string value destructor.
dbsqlfuzz 65209ab5d5730e4fd14fff9d024325a77239036e.

FossilOrigin-Name: 88be7075cdc7000d3a1e84e49064cf8c28fc7caca9c464f44a83265223961b51

manifest

@@ -1,5 +1,5 @@
-C Defer\ssetting\sthe\sBTS_PAGESIZE_FIXED\sflag\suntil\safter\swe\sare\scertain\sthere\nare\sno\serrors\sand\sthe\spage\ssize\shas\sbeen\sset.
-D 2023-06-10T19:33:02.847
+C Make\ssure\stemporary\ssqlite3_value\sobjects\sused\sby\sSTAT4\sare\sreset\sto\sNULL\sprior\nto\sbeing\sreused,\sto\sprevent\sa\smemory\sleak\sassociated\swith\nthe\scustom\sxDel\sstring\svalue\sdestructor.\ndbsqlfuzz\s65209ab5d5730e4fd14fff9d024325a77239036e.
+D 2023-06-11T21:58:20.965
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -712,7 +712,7 @@ F src/vdbeInt.h 7bd49eef8f89c1a271fbf12d80a206bf56c876814c5fc6bee340f4e1907095ae
 F src/vdbeapi.c de9703f8705afc393cc2864669ce28cf9516983c8331d59aa2b978de01634365
 F src/vdbeaux.c 85627cd1d2fb6e069567128001b55824a170efbc30c2fb1b85261ac30d001b38
 F src/vdbeblob.c 2516697b3ee8154eb8915f29466fb5d4f1ae39ee8b755ea909cefaf57ec5e2ce
-F src/vdbemem.c 1cac4028c0dabbf1f3259f107440e2780e05ac9fe419e9709e6eb4e166ba714b
+F src/vdbemem.c 710119a8e35e47813681c48703d65a80ba22792192de90bc51dc0d6366f2a79e
 F src/vdbesort.c 0d40dca073c94e158ead752ef4225f4fee22dee84145e8c00ca2309afb489015
 F src/vdbetrace.c fe0bc29ebd4e02c8bc5c1945f1d2e6be5927ec12c06d89b03ef2a4def34bf823
 F src/vdbevtab.c aae4bd769410eb7e1d02c42613eec961d514459b1c3c1c63cfc84e92a137daac
@@ -2040,8 +2040,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P ac1d3860af4eb30e4a7444b01d7b5afc91a4b1f5e3fe5414a491c6edc7ff1631
-R 838fdd5b776c2494497dd1802cc3163b
+P 70e12efd1b189560e07f59db03a20b8c1ab19224aae4fc3d7c0bdfd2568064ea
+R 17ce6759cf4b3b8032e0247b78c0a077
 U drh
-Z d49175acb3bb5ce67db0eb3e3a6c2e40
+Z 97dad2d6a167510bb1574da3d7628541
 # Remove this line to create a well-formed Fossil manifest.

manifest.uuid

@@ -1 +1 @@
-70e12efd1b189560e07f59db03a20b8c1ab19224aae4fc3d7c0bdfd2568064ea
+88be7075cdc7000d3a1e84e49064cf8c28fc7caca9c464f44a83265223961b51

src/vdbemem.c

@@ -1431,6 +1431,7 @@ static sqlite3_value *valueNew(sqlite3 *db, struct ValueNewStat4Ctx *p){
     }
   
     pRec->nField = p->iVal+1;
+    sqlite3VdbeMemSetNull(&pRec->aMem[p->iVal]);
     return &pRec->aMem[p->iVal];
   }
 #else