Index: src/util.c
==================================================================
--- src/util.c
+++ src/util.c
@@ -558,11 +558,11 @@
   *pResult = result;
 
   /* return true if number and no extra non-whitespace chracters after */
   if( z==zEnd && nDigit>0 && eValid && eType>0 ){
     return eType;
-  }else if( eType>=2 && (eType==3 || eValid) ){
+  }else if( eType>=2 && (eType==3 || eValid) && nDigit>0 ){
     return -1;
   }else{
     return 0;
   }
 #else

Index: test/cast.test
==================================================================
--- test/cast.test
+++ test/cast.test
@@ -428,7 +428,24 @@
   DROP TABLE IF EXISTS t0;
   CREATE TABLE t0 (c0 TEXT);
   INSERT INTO t0(c0) VALUES ('1.0');
   SELECT CAST(c0 AS NUMERIC) FROM t0;
 } {1}
+
+# 2019-06-10
+# https://sqlite.org/src/info/27de823723a41df45af3
+#
+do_execsql_test cast-7.30 {
+  SELECT -'.';
+} 0
+do_execsql_test cast-7.31 {
+  SELECT '.'+0;
+} 0
+do_execsql_test cast-7.32 {
+  SELECT CAST('.' AS numeric);
+} 0
+do_execsql_test cast-7.33 {
+  SELECT -CAST('.' AS numeric);
+} 0
+
 
 finish_test