[go_router] pop() doesn't work in extension on GoRouter

Steps to reproduce

Create an extension on GoRouter

extension GoRouterExt on GoRouter {
String get _currentRoute => routerDelegate.currentConfiguration.matches.last.matchedLocation;

void popToIndex(int index) {
int currentIndex = routerDelegate.currentConfiguration.matches.length - 1;
while (routerDelegate.currentConfiguration.matches.length > index) {
  if (!canPop() || currentIndex == index) {
    return;
  }
  pop();
  currentIndex--;
}
}

void popUntilPath(String ancestorPath) {
while (_currentRoute != ancestorPath) {
  if (!canPop()) {
    return;
  }
  pop();
}
}
}

use it like GoRouter.of(context).popUntilPath(thePath);

Expected results

pop until "thePath"

Actual results

  void popUntilPath(String ancestorPath) {
    while (_currentRoute != ancestorPath) {
      if (!canPop()) {
        return;
      }
      pop();  // this pop() seems not working as it should
    }
  }

the pop() is not working properly, so stuck in this while loop.

this was working in Go_Router 13.2.5, but not after v14

Code sample

```dart extension GoRouterExt on GoRouter { String get _currentRoute => routerDelegate.currentConfiguration.matches.last.matchedLocation; void popToIndex(int index) { int currentIndex = routerDelegate.currentConfiguration.matches.length - 1; while (routerDelegate.currentConfiguration.matches.length > index) { if (!canPop() || currentIndex == index) { return; } pop(); currentIndex--; } } void popUntilPath(String ancestorPath) { while (_currentRoute != ancestorPath) { if (!canPop()) { return; } pop(); } } } ```

Screenshots or Video

Screenshots / Video demonstration

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Logs

```console [Paste your logs here] ```

Flutter Doctor output

Doctor output

```console [✓] Flutter (Channel stable, 3.22.0, on macOS 14.5 23F79 darwin-arm64, locale zh-Hant-TW) • Flutter version 3.22.0 on channel stable at /Users/shaynechang/development/flutter • Upstream repository https://github.com/flutter/flutter.git • Framework revision 5dcb86f68f (4 months ago), 2024-05-09 07:39:20 -0500 • Engine revision f6344b75dc • Dart version 3.4.0 • DevTools version 2.34.3 [✓] Android toolchain - develop for Android devices (Android SDK version 35.0.0) • Android SDK at /Users/shaynechang/Library/Android/sdk • Platform android-35, build-tools 35.0.0 • Java binary at: /Applications/Android Studio.app/Contents/jbr/Contents/Home/bin/java • Java version OpenJDK Runtime Environment (build 17.0.10+0-17.0.10b1087.21-11609105) • All Android licenses accepted. [✓] Xcode - develop for iOS and macOS (Xcode 15.4) • Xcode at /Applications/Xcode.app/Contents/Developer • Build 15F31d • CocoaPods version 1.15.2 [✓] Chrome - develop for the web • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome [✓] Android Studio (version 2024.1) • Android Studio at /Applications/Android Studio.app/Contents • Flutter plugin can be installed from: 🔨 https://plugins.jetbrains.com/plugin/9212-flutter • Dart plugin can be installed from: 🔨 https://plugins.jetbrains.com/plugin/6351-dart • Java version OpenJDK Runtime Environment (build 17.0.10+0-17.0.10b1087.21-11609105) [✓] VS Code (version 1.92.2) • VS Code at /Applications/Visual Studio Code.app/Contents • Flutter extension version 3.94.0 [✓] Connected device (5 available) • sdk gphone16k arm64 (mobile) • emulator-5554 • android-arm64 • Android 15 (API 35) (emulator) • iPhone 15 (mobile) • C26EED6F-3C29-4D42-81CD-4535632B3A69 • ios • com.apple.CoreSimulator.SimRuntime.iOS-17-5 (simulator) • macOS (desktop) • macos • darwin-arm64 • macOS 14.5 23F79 darwin-arm64 • Mac Designed for iPad (desktop) • mac-designed-for-ipad • darwin • macOS 14.5 23F79 darwin-arm64 • Chrome (web) • chrome • web-javascript • Google Chrome 127.0.6533.120 [✓] Network resources • All expected network resources are available. • No issues found! ```

flutter / flutter