diff --git a/Zend/Optimizer/pass1.c b/Zend/Optimizer/pass1.c
index 110babf3e95..695348a3891 100644
--- a/Zend/Optimizer/pass1.c
+++ b/Zend/Optimizer/pass1.c
@@ -104,33 +104,9 @@ constant_binary_op:
 			break;
 
 		case ZEND_ASSIGN_OP:
-			if (opline->op2_type == IS_CONST) {
-				if (opline->extended_value == ZEND_ADD
-				 || opline->extended_value == ZEND_SUB
-				 || opline->extended_value == ZEND_MUL
-				 || opline->extended_value == ZEND_DIV
-				 || opline->extended_value == ZEND_POW) {
-					if (Z_TYPE(ZEND_OP2_LITERAL(opline)) == IS_STRING) {
-						/* don't optimize if it should produce a runtime numeric string error */
-						if (is_numeric_string(Z_STRVAL(ZEND_OP2_LITERAL(opline)), Z_STRLEN(ZEND_OP2_LITERAL(opline)), NULL, NULL, 0)) {
-							convert_scalar_to_number(&ZEND_OP2_LITERAL(opline));
-						}
-					}
-				} else if (opline->extended_value == ZEND_MOD
-				 || opline->extended_value == ZEND_SL
-				 || opline->extended_value == ZEND_SR) {
-					zval *op2 = &ZEND_OP2_LITERAL(opline);
-					if (Z_TYPE_P(op2) != IS_LONG) {
-						if (!zend_is_op_long_compatible(op2)) {
-							break;
-						}
-						convert_to_long(op2);
-					}
-				} else if (opline->extended_value == ZEND_CONCAT) {
-					if (Z_TYPE(ZEND_OP2_LITERAL(opline)) != IS_STRING) {
-						convert_to_string(&ZEND_OP2_LITERAL(opline));
-					}
-				}
+			if (opline->extended_value == ZEND_CONCAT && opline->op2_type == IS_CONST
+					&& Z_TYPE(ZEND_OP2_LITERAL(opline)) != IS_STRING) {
+				convert_to_string(&ZEND_OP2_LITERAL(opline));
 			}
 			break;
 
diff --git a/Zend/tests/assign_op_type_error.phpt b/Zend/tests/assign_op_type_error.phpt
new file mode 100644
index 00000000000..5f175613e20
--- /dev/null
+++ b/Zend/tests/assign_op_type_error.phpt
@@ -0,0 +1,57 @@
+--TEST--
+TypeError for compound assignment operations
+--FILE--
+<?php
+
+$x = [];
+try {
+    $x += "1";
+} catch (TypeError $e) {
+    echo $e->getMessage(), "\n";
+}
+try {
+    $x -= "1";
+} catch (TypeError $e) {
+    echo $e->getMessage(), "\n";
+}
+try {
+    $x *= "1";
+} catch (TypeError $e) {
+    echo $e->getMessage(), "\n";
+}
+try {
+    $x /= "1";
+} catch (TypeError $e) {
+    echo $e->getMessage(), "\n";
+}
+try {
+    $x **= "1";
+} catch (TypeError $e) {
+    echo $e->getMessage(), "\n";
+}
+try {
+    $x %= "1";
+} catch (TypeError $e) {
+    echo $e->getMessage(), "\n";
+}
+try {
+    $x <<= "1";
+} catch (TypeError $e) {
+    echo $e->getMessage(), "\n";
+}
+try {
+    $x >>= "1";
+} catch (TypeError $e) {
+    echo $e->getMessage(), "\n";
+}
+
+?>
+--EXPECT--
+Unsupported operand types: array + string
+Unsupported operand types: array - string
+Unsupported operand types: array * string
+Unsupported operand types: array / string
+Unsupported operand types: array ** string
+Unsupported operand types: array % string
+Unsupported operand types: array << string
+Unsupported operand types: array >> string