Fix

m3m0r7 · m3m0r7 · commit 1e7f069a4d49 · 2019-04-29T13:26:25.000+09:00
diff --git a/src/Kernel/Mnemonics/_invokespecial.php b/src/Kernel/Mnemonics/_invokespecial.php
@@ -28,9 +28,12 @@ public function execute(): void
         $invokerClass = $this->popFromOperandStack();
 
 
-        $arguments = array_fill(0, $parsedSignature['arguments_count'] - 1, null);
-        for ($i = $parsedSignature['arguments_count'] - 1; $i >= 0; $i--) {
-            $arguments[$i] = $this->popFromOperandStack();
+        $arguments = [];
+        if (($length = $parsedSignature['arguments_count'] - 1) >= 0) {
+            $arguments = array_fill(0, $length, null);
+            for ($i = $length; $i >= 0; $i--) {
+                $arguments[$i] = $this->popFromOperandStack();
+            }
         }
 
         $methodName = $cpInfo[$nameAndTypeIndex->getNameIndex()]->getString();
diff --git a/src/Kernel/Mnemonics/_invokestatic.php b/src/Kernel/Mnemonics/_invokestatic.php
@@ -30,9 +30,12 @@ public function execute(): void
         [$resourceType, $classObject] = $this->getOptions('class_resolver')
             ->resolve($cpInfo[$cpInfo[$cp->getClassIndex()]->getClassIndex()]->getString());
 
-        $arguments = array_fill(0, $signature['arguments_count'] - 1, null);
-        for ($i = $signature['arguments_count'] - 1; $i >= 0; $i--) {
-            $arguments[$i] = $this->popFromOperandStack();
+        $arguments = [];
+        if (($length = $signature['arguments_count'] - 1) >= 0) {
+            $arguments = array_fill(0, $length, null);
+            for ($i = $length; $i >= 0; $i--) {
+                $arguments[$i] = $this->popFromOperandStack();
+            }
         }
 
         $return = null;
diff --git a/src/Kernel/Mnemonics/_invokevirtual.php b/src/Kernel/Mnemonics/_invokevirtual.php
@@ -29,9 +29,12 @@ public function execute(): void
         // signature
         $signature = Formatter::parseSignature($cpInfo[$nameAndTypeIndex->getDescriptorIndex()]->getString());
 
-        $arguments = array_fill(0, $signature['arguments_count'] - 1, null);
-        for ($i = $signature['arguments_count'] - 1; $i >= 0; $i--) {
-            $arguments[$i] = $this->popFromOperandStack();
+        $arguments = [];
+        if (($length = $signature['arguments_count'] - 1) >= 0) {
+            $arguments = array_fill(0, $length, null);
+            for ($i = $length; $i >= 0; $i--) {
+                $arguments[$i] = $this->popFromOperandStack();
+            }
         }
 
         $invokerClass = $this->popFromOperandStack();
