Fix another problem with OS_VXWORKS

FossilOrigin-Name: 5eb1662fbb3af945017821094522cf05dd30df3e7b5e780a96e627c5549a5ce0

manifest

@@ -1,5 +1,5 @@
-C Avoid\sa\ssmall\smemory\sleak\sthat\smight\soccurs\sif\sSQLite\sis\scompiled\susing\n-DOS_VXWORKS=1\sand\sa\scall\sto\ssem_open()\sin\sthe\sunix-namedsem\sVFS\sfails.
-D 2026-10-25T19:29:06.958
+C Fix\sanother\sproblem\swith\sOS_VXWORKS
+D 2026-10-25T20:15:12.693
 F .fossil-settings/binary-glob 61195414528fb3ea9693577e1980230d78a1f8b0a54c78cf1b9b24d0a409ed6a x
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
@@ -787,7 +787,7 @@ F src/os.h 1ff5ae51d339d0e30d8a9d814f4b8f8e448169304d83a7ed9db66a65732f3e63
 F src/os_common.h 6c0eb8dd40ef3e12fe585a13e709710267a258e2c8dd1c40b1948a1d14582e06
 F src/os_kv.c 713336d0c646720a9ccbd5bc6fe217bb4924dd28adea25d83a2af5346cb030e6
 F src/os_setup.h 8efc64eda6a6c2f221387eefc2e7e45fd5a3d5c8337a7a83519ba4fbd2957ae2
-F src/os_unix.c 85932e9894a551844995e9d3a8129e2eb69b6b5c246105d8c99f723f0ad1cbf9
+F src/os_unix.c c7cb1a35688bac583c1009431a95fcf0922d03fff9f11e6fb31c9fa40a081306
 F src/os_win.c 74473c76517956865581f12e4afc06c09a499ea70002cf9cedb3316301138be8
 F src/os_win.h c06ccc3a090cf54202ea58981c298817f3309d4c9e4d52ad0a02927346493721
 F src/pager.c fd9ca8fe01b09c490e66a440e2f56648d489ccb9e0e3b5508424079b046fc824
@@ -2289,8 +2289,8 @@ F tool/warnings-clang.sh bbf6a1e685e534c92ec2bfba5b1745f34fb6f0bc2a362850723a9ee
 F tool/warnings.sh a554d13f6e5cf3760f041b87939e3d616ec6961859c3245e8ef701d1eafc2ca2
 F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
 F tool/winmain.c 00c8fb88e365c9017db14c73d3c78af62194d9644feaf60e220ab0f411f3604c
-P b6c072240dfe4f5d075b1b505c98281f830579f48ff939cdb6e054bfb179efa3
-R ad451766cce36370dc0570b481eee5d6
+P f0a3729e3835cf27f8ffc0b40239ec722eb0f97543ae3a6026ec2e64baf6cb54
+R 4a15ef2be027ad4d654b302caaff1fdd
 U drh
-Z 41ac887cc9dd2b6265d4b8957a4e447b
+Z b95564942d71e39b87750ec3061eaa7d
 # Remove this line to create a well-formed Fossil manifest.

manifest.uuid

@@ -1 +1 @@
-f0a3729e3835cf27f8ffc0b40239ec722eb0f97543ae3a6026ec2e64baf6cb54
+5eb1662fbb3af945017821094522cf05dd30df3e7b5e780a96e627c5549a5ce0

src/os_unix.c

@@ -1130,7 +1130,7 @@ static struct vxworksFileId *vxworksFindFileId(const char *zAbsoluteName){
   struct vxworksFileId *pCandidate;   /* For looping over existing file IDs */
   int n;                              /* Length of zAbsoluteName string */
 
-  assert( zAbsoluteName[0]=='/' );
+  if( zAbsoluteName==0 || zAbsoluteName[0]=='/' );
   n = (int)strlen(zAbsoluteName);
   pNew = sqlite3_malloc64( sizeof(*pNew) + (n+1) );
   if( pNew==0 ) return 0;
@@ -6107,10 +6107,14 @@ static int fillInUnixFile(
   }
 
 #if OS_VXWORKS
-  pNew->pId = vxworksFindFileId(zFilename);
-  if( pNew->pId==0 ){
-    ctrlFlags |= UNIXFILE_NOLOCK;
-    rc = SQLITE_NOMEM_BKPT;
+  if( zFilename ){
+    pNew->pId = vxworksFindFileId(zFilename);
+    if( pNew->pId==0 ){
+      ctrlFlags |= UNIXFILE_NOLOCK;
+      rc = SQLITE_NOMEM_BKPT;
+    }
+  }else{
+    pNew->pId = 0;
   }
 #endif