In the shell tool, avoid modifying internal data structures until after the arguments to ".open" have been parsed.

FossilOrigin-Name: fcc509d325dabe06275e7804183bb8b4ba6470a45b443bc8292eecd0974e6367

manifest

@@ -1,5 +1,5 @@
-C Remove\san\sunnecessary\sbranch\sfrom\sexprAnalyze(),\sresulting\sin\sa\ssmall\nperformance\sgain.
-D 2021-12-02T13:45:10.819
+C In\sthe\sshell\stool,\savoid\smodifying\sinternal\sdata\sstructures\suntil\safter\sthe\sarguments\sto\s".open"\shave\sbeen\sparsed.
+D 2021-12-02T14:16:30.751
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -551,7 +551,7 @@ F src/random.c 097dc8b31b8fba5a9aca1697aeb9fd82078ec91be734c16bffda620ced7ab83c
 F src/resolve.c 4a1db4aadd802683db40ca2dbbb268187bd195f10cbdb7206dbd8ac988795571
 F src/rowset.c ba9515a922af32abe1f7d39406b9d35730ed65efab9443dc5702693b60854c92
 F src/select.c a7a3d9f54eb24821ec5f67f2e5589b68a5d42d46fc5849d7376886777d93a85a
-F src/shell.c.in 975f268ef261773fcbed1e519dfa10c4f33e8b1cffc12120563e61857fff07c6
+F src/shell.c.in e7ee6517544d075d9f06ee2571567026b89cf9fbeef16a74918019b1cb425764
 F src/sqlite.h.in 5cd209ac7dc4180f0e19292846f40440b8488015849ca0110c70b906b57d68f0
 F src/sqlite3.rc 5121c9e10c3964d5755191c80dd1180c122fc3a8
 F src/sqlite3ext.h 8ff2fd2c166150b2e48639f5e506fb44e29f1a3f65031710b9e89d1c126ac839
@@ -1933,7 +1933,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 080b35e62e5c6bb4ea162bc75232b81e54da5e3e01e762127e228400e8afef1d
-R a7ab895f8cfffd485e37af57ff425c88
-U drh
-Z 5fe3f769c9fffb4907c1638f83e89ed7
+P 3312be1db3519074393573265459f6a1eeabce541a9ef4d93689529ea2b8f739
+R 7b39f65268d7d5d5ddeb7e728b46cc8a
+U dan
+Z 6583dbaeea3c12c619555be53ea08d30

manifest.uuid

@@ -1 +1 @@
-3312be1db3519074393573265459f6a1eeabce541a9ef4d93689529ea2b8f739
+fcc509d325dabe06275e7804183bb8b4ba6470a45b443bc8292eecd0974e6367

src/shell.c.in

@@ -8941,16 +8941,8 @@ static int do_meta_command(char *zLine, ShellState *p){
     char *zNewFilename = 0;  /* Name of the database file to open */
     int iName = 1;           /* Index in azArg[] of the filename */
     int newFlag = 0;         /* True to delete file before opening */
-    /* Close the existing database */
-    session_close_all(p, -1);
-    close_db(p->db);
-    p->db = 0;
-    p->pAuxDb->zDbFilename = 0;
-    sqlite3_free(p->pAuxDb->zFreeOnClose);
-    p->pAuxDb->zFreeOnClose = 0;
-    p->openMode = SHELL_OPEN_UNSPEC;
-    p->openFlags = 0;
-    p->szMax = 0;
+    int openMode = SHELL_OPEN_UNSPEC;
+
     /* Check for command-line arguments */
     for(iName=1; iName<nArg; iName++){
       const char *z = azArg[iName];
@@ -8958,19 +8950,19 @@ static int do_meta_command(char *zLine, ShellState *p){
         newFlag = 1;
 #ifdef SQLITE_HAVE_ZLIB
       }else if( optionMatch(z, "zip") ){
-        p->openMode = SHELL_OPEN_ZIPFILE;
+        openMode = SHELL_OPEN_ZIPFILE;
 #endif
       }else if( optionMatch(z, "append") ){
-        p->openMode = SHELL_OPEN_APPENDVFS;
+        openMode = SHELL_OPEN_APPENDVFS;
       }else if( optionMatch(z, "readonly") ){
-        p->openMode = SHELL_OPEN_READONLY;
+        openMode = SHELL_OPEN_READONLY;
       }else if( optionMatch(z, "nofollow") ){
         p->openFlags |= SQLITE_OPEN_NOFOLLOW;
 #ifndef SQLITE_OMIT_DESERIALIZE
       }else if( optionMatch(z, "deserialize") ){
-        p->openMode = SHELL_OPEN_DESERIALIZE;
+        openMode = SHELL_OPEN_DESERIALIZE;
       }else if( optionMatch(z, "hexdb") ){
-        p->openMode = SHELL_OPEN_HEXDB;
+        openMode = SHELL_OPEN_HEXDB;
       }else if( optionMatch(z, "maxsize") && iName+1<nArg ){
         p->szMax = integerValue(azArg[++iName]);
 #endif /* SQLITE_OMIT_DESERIALIZE */
@@ -8986,6 +8978,18 @@ static int do_meta_command(char *zLine, ShellState *p){
         zNewFilename = sqlite3_mprintf("%s", z);
       }
     }
+
+    /* Close the existing database */
+    session_close_all(p, -1);
+    close_db(p->db);
+    p->db = 0;
+    p->pAuxDb->zDbFilename = 0;
+    sqlite3_free(p->pAuxDb->zFreeOnClose);
+    p->pAuxDb->zFreeOnClose = 0;
+    p->openMode = openMode;
+    p->openFlags = 0;
+    p->szMax = 0;
+
     /* If a filename is specified, try to open it first */
     if( zNewFilename || p->openMode==SHELL_OPEN_HEXDB ){
       if( newFlag && !p->bSafeMode ) shellDeleteFile(zNewFilename);