selenide: Can't use SelenideElement if it was declared before setWebDriver() method

The problem

As per issue title, declaring a SelenideElement before calling WebDriverRunner.setWebDriver(driver) method leads to an IllegalStateException whenever user tries to interact with the element.

Details

If we do not use setWebDriver method, then everything works regardless of where you declare SelenideElement. It can be a test class field for instance and still works. Exception stacktrace

java.lang.IllegalStateException: Webdriver has been closed. You need to call open(url) to open a browser again.

	at com.codeborne.selenide.drivercommands.LazyDriver.getWebDriver(LazyDriver.java:65)
	at com.codeborne.selenide.impl.ElementFinder.getSearchContext(ElementFinder.java:86)
	at com.codeborne.selenide.impl.ElementFinder.getWebElement(ElementFinder.java:74)
	at com.codeborne.selenide.impl.WebElementSource.checkCondition(WebElementSource.java:47)
	at com.codeborne.selenide.commands.Should.should(Should.java:35)
	at com.codeborne.selenide.commands.Should.execute(Should.java:29)
	at com.codeborne.selenide.commands.Should.execute(Should.java:12)
	at com.codeborne.selenide.commands.Commands.execute(Commands.java:144)
	at com.codeborne.selenide.impl.SelenideElementProxy.dispatchAndRetry(SelenideElementProxy.java:99)
	at com.codeborne.selenide.impl.SelenideElementProxy.invoke(SelenideElementProxy.java:65)
	at com.sun.proxy.$Proxy5.shouldBe(Unknown Source)

Tell us about your environment

• Selenide Version: 5.0.1
• Chrome\Firefox\IE Version: irrelevant
• Browser Driver Version: irrelevant
• Selenium Version: 3.x
• OS Version: irrelevant

Code To Reproduce Issue [ Good To Have ]

Easily reproducible with:

        SelenideElement a=$("abc");
        WebDriverRunner.setWebDriver(new ChromeDriver());
        open("http://google.com");
        a.shouldNot(exist);

And this way it works

        WebDriverRunner.setWebDriver(new ChromeDriver());
        SelenideElement a=$("abc");
        open("http://google.com");
        a.shouldNot(exist);

Also this works

public class SimpleTest {

    public SelenideElement search = $(By.name("q"));

    @Test
    public void testSimple() {
        open("https://www.google.com");
        search.shouldBe(Condition.visible);
    }

}

And this does not

public class SimpleTest {

    public SelenideElement search = $(By.name("q"));

    @Test
    public void testSimple() {
        WebDriverRunner.setWebDriver(new ChromeDriver(new ChromeOptions()));
        open("https://www.google.com");
        search.shouldBe(Condition.visible);
    }
}