Add a new assert() to help static analyzers understand that a pointer is

never NULL.

FossilOrigin-Name: 433f2b942ee6f79d50ebe9b08fa3ea8162db6a10ce9d80e2bc193124baa1b083

manifest

@@ -1,5 +1,5 @@
-C Fix\sa\sharmless\scompiler\swarning\sin\san\sassert().
-D 2024-08-07T14:54:54.630
+C Add\sa\snew\sassert()\sto\shelp\sstatic\sanalyzers\sunderstand\sthat\sa\spointer\sis\nnever\sNULL.
+D 2024-08-07T15:17:37.116
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -837,7 +837,7 @@ F src/vdbeapi.c 80235ac380e9467fec1cb0883354d841f2a771976e766995f7e0c77f845406df
 F src/vdbeaux.c 25d685cafe119ff890c94345e884ea558a6b5d823bfa52ba708eb8ff3c70aa71
 F src/vdbeblob.c 13f9287b55b6356b4b1845410382d6bede203ceb29ef69388a4a3d007ffacbe5
 F src/vdbemem.c 831a244831eaa45335f9ae276b50a7a82ee10d8c46c2c72492d4eb8c98d94d89
-F src/vdbesort.c 218fb7358e6c4ca3c843171d989ff31b4bc0b708c10e6a095ae7e9aa3335cfae
+F src/vdbesort.c d0a3c7056c081703c8b6d91ad60f17da5e062a5c64bf568ed0fa1b5f4cae311f
 F src/vdbetrace.c fe0bc29ebd4e02c8bc5c1945f1d2e6be5927ec12c06d89b03ef2a4def34bf823
 F src/vdbevtab.c fc46b9cbd759dc013f0b3724549cc0d71379183c667df3a5988f7e2f1bd485f3
 F src/vtab.c 5fb499d20494b7eecaadb7584634af9afcb374cb0524912b475fcb1712458a1b
@@ -2203,8 +2203,8 @@ F vsixtest/vsixtest.tcl 6195aba1f12a5e10efc2b8c0009532167be5e301abe5b31385638080
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 048a71bae48aacdfc91e59330db4d4b3d663f00665f51a7110ea82e0508758ec
-R 29c7af48e92a52bfc015cef89b4e9b80
+P 5e4c9a74b2efa74ace67f644fb6bb37e07f5982f8faaca9463e3daa50b0469d7
+R 563f140a9b39903a75648b155c162aef
 U drh
-Z 823f9a62b624b3de6573555750300eee
+Z 2831e995241ff77754cf2f0030919a15
 # Remove this line to create a well-formed Fossil manifest.

manifest.uuid

@@ -1 +1 @@
-5e4c9a74b2efa74ace67f644fb6bb37e07f5982f8faaca9463e3daa50b0469d7
+433f2b942ee6f79d50ebe9b08fa3ea8162db6a10ce9d80e2bc193124baa1b083

src/vdbesort.c

@@ -563,6 +563,7 @@ static int vdbePmaReadBlob(
       rc = vdbePmaReadBlob(p, nCopy, &aNext);
       if( rc!=SQLITE_OK ) return rc;
       assert( aNext!=p->aAlloc );
+      assert( aNext!=0 );
       memcpy(&p->aAlloc[nByte - nRem], aNext, nCopy);
       nRem -= nCopy;
     }