Check that implicitly sized array constructors have arguments

src/compiler/translator/ParseContext.cpp

@@ -2595,6 +2595,12 @@ TIntermTyped *TParseContext::addConstructor(TIntermNode *arguments,
     TType type = fnCall->getReturnType();
     if (type.isUnsizedArray())
     {
+        if (fnCall->getParamCount() == 0)
+        {
+            error(line, "implicitly sized array constructor must have at least one argument", "[]");
+            type.setArraySize(1u);
+            return TIntermTyped::CreateZero(type);
+        }
         type.setArraySize(static_cast<unsigned int>(fnCall->getParamCount()));
     }
     bool constType = true;

src/tests/compiler_tests/MalformedShader_test.cpp

@@ -3056,4 +3056,21 @@ TEST_F(MalformedShaderTest, LogicalOpRHSIsBVec)
     {
         FAIL() << "Shader compilation succeeded, expecting failure " << mInfoLog;
     }
-}
\ No newline at end of file
+}
+
+// Check compiler doesn't crash when there's an unsized array constructor with no parameters.
+// ESSL 3.00.6 section 4.1.9: Array size must be greater than zero.
+TEST_F(MalformedShaderTest, UnsizedArrayConstructorNoParameters)
+{
+    const std::string &shaderString =
+        "#version 300 es\n"
+        "void main()\n"
+        "{\n"
+        "    int[]();\n"
+        "}\n";
+
+    if (compile(shaderString))
+    {
+        FAIL() << "Shader compilation succeeded, expecting failure " << mInfoLog;
+    }
+}