[Bug]: Locator screenshot with mask always fails - serialization bug

### Version

1.52.0

### Steps to reproduce

Use this reproduction example, run the main method.

```
import com.microsoft.playwright.Browser;
import com.microsoft.playwright.BrowserContext;
import com.microsoft.playwright.Locator;
import com.microsoft.playwright.Page;
import com.microsoft.playwright.Playwright;
import java.util.List;

public class LocatorScreenshotBugReproducer {

  public static void main(String[] args) {
    try (Playwright playwright = Playwright.create();
        Browser browser = playwright.chromium().launch()) {
      BrowserContext context = browser.newContext();
      Page page = context.newPage();
      page.navigate("https://www.playwright.dev");

      var heading = page.locator("h1");

      heading.waitFor();

      // this throws exception, only if a mask is specified
      heading.screenshot(
          new Locator.ScreenshotOptions()
              .setMask(List.of(heading.locator("span"))));

    } catch (Exception e) {
      e.printStackTrace();
      throw e;
    }
  }
}
```

### Expected behavior

Screenshot should be taken

### Actual behavior

The code fails with an exception and the following stack trace:

```
com.google.gson.JsonIOException: Failed making field 'java.lang.Throwable#detailMessage' accessible; either increase its visibility or write a custom TypeAdapter for its declaring type.
	at com.google.gson.internal.reflect.ReflectionHelper.makeAccessible(ReflectionHelper.java:38)
	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:286)
	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:130)
	at com.google.gson.Gson.getAdapter(Gson.java:556)
	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.createBoundField(ReflectiveTypeAdapterFactory.java:160)
	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:294)
	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:130)
	at com.google.gson.Gson.getAdapter(Gson.java:556)
	at com.google.gson.internal.bind.MapTypeAdapterFactory.create(MapTypeAdapterFactory.java:125)
	at com.google.gson.Gson.getAdapter(Gson.java:556)
	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.createBoundField(ReflectiveTypeAdapterFactory.java:160)
	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:294)
	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:130)
	at com.google.gson.Gson.getAdapter(Gson.java:556)
	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.createBoundField(ReflectiveTypeAdapterFactory.java:160)
	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:294)
	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:130)
	at com.google.gson.Gson.getAdapter(Gson.java:556)
	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.createBoundField(ReflectiveTypeAdapterFactory.java:160)
	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:294)
	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:130)
	at com.google.gson.Gson.getAdapter(Gson.java:556)
	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.createBoundField(ReflectiveTypeAdapterFactory.java:160)
	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:294)
	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:130)
	at com.google.gson.Gson.getAdapter(Gson.java:556)
	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.createBoundField(ReflectiveTypeAdapterFactory.java:160)
	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:294)
	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:130)
	at com.google.gson.Gson.getAdapter(Gson.java:556)
	at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:55)
	at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.write(CollectionTypeAdapterFactory.java:97)
	at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.write(CollectionTypeAdapterFactory.java:61)
	at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:70)
	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.write(ReflectiveTypeAdapterFactory.java:196)
	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.write(ReflectiveTypeAdapterFactory.java:368)
	at com.google.gson.Gson.toJson(Gson.java:842)
	at com.google.gson.Gson.toJsonTree(Gson.java:712)
	at com.google.gson.Gson.toJsonTree(Gson.java:689)
	at com.microsoft.playwright.impl.ElementHandleImpl.screenshotImpl(ElementHandleImpl.java:349)
	at com.microsoft.playwright.impl.ElementHandleImpl.lambda$screenshot$25(ElementHandleImpl.java:329)
	at com.microsoft.playwright.impl.LoggingSupport.withLogging(LoggingSupport.java:47)
	at com.microsoft.playwright.impl.ChannelOwner.withLogging(ChannelOwner.java:97)
	at com.microsoft.playwright.impl.ElementHandleImpl.screenshot(ElementHandleImpl.java:329)
	at com.microsoft.playwright.impl.LocatorImpl.lambda$screenshot$5(LocatorImpl.java:486)
	at com.microsoft.playwright.impl.LocatorImpl.withElement(LocatorImpl.java:85)
	at com.microsoft.playwright.impl.LocatorImpl.screenshot(LocatorImpl.java:486)
	at LocatorScreenshotBugReproducer.main(LocatorScreenshotBugReproducer.java:22)
Caused by: java.lang.reflect.InaccessibleObjectException: Unable to make field private java.lang.String java.lang.Throwable.detailMessage accessible: module java.base does not "opens java.lang" to unnamed module @59fa0ced
	at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:354)
	at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:297)
	at java.base/java.lang.reflect.Field.checkCanSetAccessible(Field.java:178)
	at java.base/java.lang.reflect.Field.setAccessible(Field.java:172)
	at com.google.gson.internal.reflect.ReflectionHelper.makeAccessible(ReflectionHelper.java:35)
	... 47 more
```

### Additional context

Bug analysis:
The Locator screenshot functionality forgets to remove the `mask` field from the generic Gson serialization of the options, and Gson finally fails because deep inside the `mask` field (which is a `Locator`) is an `Exception` field which cannot be serialized.

The Page screenshot code has handled this by special-casing the `mask` field. This needs to be done also for the Locator code (actually located in `ElementHandleImpl`).

Working screenshot code:
https://github.com/microsoft/playwright-java/blob/fddb146d731cd3c1a11260bc715ad20eaf7a2d46/playwright/src/main/java/com/microsoft/playwright/impl/PageImpl.java#L1211-L1222

Special handling for `mask` missing:
https://github.com/microsoft/playwright-java/blob/fddb146d731cd3c1a11260bc715ad20eaf7a2d46/playwright/src/main/java/com/microsoft/playwright/impl/ElementHandleImpl.java#L332

### Environment

Java 17

	List<Locator> mask = options.mask;
	options.mask = null;
	JsonObject params = gson().toJsonTree(options).getAsJsonObject();
	options.mask = mask;
	params.remove("path");
	if (mask != null) {
	JsonArray maskArray = new JsonArray();
	for (Locator locator: mask) {
	maskArray.add(((LocatorImpl) locator).toProtocol());
	}
	params.add("mask", maskArray);
	}

Sunbelt Computer Software

PL/B Language Development and Support

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

Uh oh!

[Bug]: Locator screenshot with mask always fails - serialization bug #1790

Version

Steps to reproduce

Expected behavior

Actual behavior

Additional context

Environment

Metadata

Assignees

Labels

Type

Fields

Projects

Milestone

Relationships

Development

Sunbelt Computer Software

PL/B Language Development and Support

Uh oh!

[Bug]: Locator screenshot with mask always fails - serialization bug #1790

Description

Version

Steps to reproduce

Expected behavior

Actual behavior

Additional context

Environment

Metadata

Metadata

Assignees

Labels

Type

Fields

Projects

Milestone

Relationships

Development

Issue actions