Subject: [PATCH] * Fix a potential memory leak following OOM in the decimal
 extension. * Fix minor coverity warnings in the CLI.

---
 ext/misc/decimal.c |  9 +++++----
 src/shell.c.in     | 10 +++++-----
 2 files changed, 10 insertions(+), 9 deletions(-)

diff --git a/ext/misc/decimal.c b/ext/misc/decimal.c
index a8d68ac..79fc91f 100644
--- a/ext/misc/decimal.c
+++ b/ext/misc/decimal.c
@@ -459,10 +459,11 @@ static void decimalSubFunc(
   Decimal *pA = decimal_new(context, argv[0], 0, 0);
   Decimal *pB = decimal_new(context, argv[1], 0, 0);
   UNUSED_PARAMETER(argc);
-  if( pB==0 ) return;
-  pB->sign = !pB->sign;
-  decimal_add(pA, pB);
-  decimal_result(context, pA);
+  if( pB ) {
+    pB->sign = !pB->sign;
+    decimal_add(pA, pB);
+    decimal_result(context, pA);
+  }
   decimal_free(pA);
   decimal_free(pB);
 }
diff --git a/src/shell.c.in b/src/shell.c.in
index 2d98d23..8258687 100644
--- a/src/shell.c.in
+++ b/src/shell.c.in
@@ -6715,6 +6715,7 @@ static void shellExec(sqlite3 *db, int *pRc, const char *zSql){
     if( rc!=SQLITE_OK ){
       raw_printf(stderr, "SQL error: %s\n", zErr);
     }
+    sqlite3_free(zErr);
     *pRc = rc;
   }
 }
@@ -8017,7 +8018,6 @@ static int do_meta_command(char *zLine, ShellState *p){
 
   if( c=='f' && strncmp(azArg[0], "fullschema", n)==0 ){
     ShellState data;
-    char *zErrMsg = 0;
     int doStats = 0;
     memcpy(&data, p, sizeof(data));
     data.showHeader = 0;
@@ -8039,7 +8039,7 @@ static int do_meta_command(char *zLine, ShellState *p){
        "   SELECT sql, type, tbl_name, name, rowid FROM sqlite_temp_schema) "
        "WHERE type!='meta' AND sql NOTNULL AND name NOT LIKE 'sqlite_%' "
        "ORDER BY rowid",
-       callback, &data, &zErrMsg
+       callback, &data, 0
     );
     if( rc==SQLITE_OK ){
       sqlite3_stmt *pStmt;
@@ -8055,12 +8055,12 @@ static int do_meta_command(char *zLine, ShellState *p){
     }else{
       raw_printf(p->out, "ANALYZE sqlite_schema;\n");
       sqlite3_exec(p->db, "SELECT 'ANALYZE sqlite_schema'",
-                   callback, &data, &zErrMsg);
+                   callback, &data, 0);
       data.cMode = data.mode = MODE_Insert;
       data.zDestTable = "sqlite_stat1";
-      shell_exec(&data, "SELECT * FROM sqlite_stat1", &zErrMsg);
+      shell_exec(&data, "SELECT * FROM sqlite_stat1", 0);
       data.zDestTable = "sqlite_stat4";
-      shell_exec(&data, "SELECT * FROM sqlite_stat4", &zErrMsg);
+      shell_exec(&data, "SELECT * FROM sqlite_stat4", 0);
       raw_printf(p->out, "ANALYZE sqlite_schema;\n");
     }
   }else
-- 
2.31.1