The sqlite3_str_new() interface never returns NULL, even after an OOM.

Code that uses that interface should invoke sqlite3_str_errcode() to see
if an OOM has occurred.

Author: D. Richard Hipp

ext/misc/analyze.c

@@ -433,7 +433,10 @@ static void analyzeFunc(
   s.db = sqlite3_context_db_handle(context);
   s.context = context;
   s.pOut = sqlite3_str_new(0);
-  if( s.pOut==0 ){ analysisError(&s, 0); return; }
+  if( sqlite3_str_errcode(s.pOut) ){
+    analysisError(&s, 0);
+    return;
+  }
   s.zSchema = (const char*)sqlite3_value_text(argv[0]);
   if( s.zSchema==0 ){
     s.zSchema = "main";

src/func.c

@@ -3106,7 +3106,7 @@ static void filestatFunc(
     assert( pPager!=0 );
     fd = sqlite3PagerFile(pPager);
     pStr = sqlite3_str_new(db);
-    if( pStr==0 ){
+    if( sqlite3_str_errcode(pStr) ){
       sqlite3_result_error_nomem(context);
     }else{
       sqlite3_str_append(pStr, "{\"db\":", 6);
@@ -3209,7 +3209,7 @@ static void parseuriFunc(
   flgs = (unsigned int)sqlite3_value_int(argv[1]);
   rc = sqlite3ParseUri(zVfs, zUri, &flgs, &pVfs, &zFile, &zErr);
   pResult = sqlite3_str_new(0);
-  if( pResult ){
+  if( !sqlite3_str_errcode(pResult) ){
     int i;
     sqlite3_str_appendf(pResult, "rc=%d", rc);
     sqlite3_str_appendf(pResult, ", flags=0x%x", flgs);