codec: nextValueBytes should not include last read token when reading a json number

Fixes #427

Author: ugorji

codec/json.go

@@ -630,6 +630,11 @@ func (d *jsonDecDriver[T]) nextValueBytes() []byte {
 	switch d.tok {
 	default:
 		_, d.tok = d.r.jsonReadNum()
+		// special case: trim last read token if a valid byte in stream
+		if d.tok != 0 {
+			vv := d.r.stopRecording()
+			return vv[:len(vv)-1]
+		}
 	case 'n':
 		d.checkLit3([3]byte{'u', 'l', 'l'}, d.r.readn3())
 	case 'f':

codec/json.mono.generated.go

@@ -3615,6 +3615,11 @@ func (d *jsonDecDriverBytes) nextValueBytes() []byte {
 	switch d.tok {
 	default:
 		_, d.tok = d.r.jsonReadNum()
+
+		if d.tok != 0 {
+			vv := d.r.stopRecording()
+			return vv[:len(vv)-1]
+		}
 	case 'n':
 		d.checkLit3([3]byte{'u', 'l', 'l'}, d.r.readn3())
 	case 'f':
@@ -7773,6 +7778,11 @@ func (d *jsonDecDriverIO) nextValueBytes() []byte {
 	switch d.tok {
 	default:
 		_, d.tok = d.r.jsonReadNum()
+
+		if d.tok != 0 {
+			vv := d.r.stopRecording()
+			return vv[:len(vv)-1]
+		}
 	case 'n':
 		d.checkLit3([3]byte{'u', 'l', 'l'}, d.r.readn3())
 	case 'f':