[pigeon] Unable to generate code When a class field contains List<SelfClass?>

### What package does this bug report belong to?

pigeon

### What target platforms are you seeing this bug on?

Android

### Have you already upgraded your packages?

Yes

### Dependency versions

<details><summary>pubspec.lock</summary>

```lock
# Generated by pub
# See https://dart.dev/tools/pub/glossary#lockfile
packages:
  _fe_analyzer_shared:
    dependency: transitive
    description:
      name: _fe_analyzer_shared
      sha256: "0b2f2bd91ba804e53a61d757b986f89f1f9eaed5b11e4b2f5a2468d86d6c9fc7"
      url: "https://pub.dev"
    source: hosted
    version: "67.0.0"
  analyzer:
    dependency: transitive
    description:
      name: analyzer
      sha256: "37577842a27e4338429a1cbc32679d508836510b056f1eedf0c8d20e39c1383d"
      url: "https://pub.dev"
    source: hosted
    version: "6.4.1"
  args:
    dependency: transitive
    description:
      name: args
      sha256: "7cf60b9f0cc88203c5a190b4cd62a99feea42759a7fa695010eb5de1c0b2252a"
      url: "https://pub.dev"
    source: hosted
    version: "2.5.0"
  async:
    dependency: transitive
    description:
      name: async
      sha256: "947bfcf187f74dbc5e146c9eb9c0f10c9f8b30743e341481c1e2ed3ecc18c20c"
      url: "https://pub.dev"
    source: hosted
    version: "2.11.0"
  boolean_selector:
    dependency: transitive
    description:
      name: boolean_selector
      sha256: "6cfb5af12253eaf2b368f07bacc5a80d1301a071c73360d746b7f2e32d762c66"
      url: "https://pub.dev"
    source: hosted
    version: "2.1.1"
  built_collection:
    dependency: transitive
    description:
      name: built_collection
      sha256: "376e3dd27b51ea877c28d525560790aee2e6fbb5f20e2f85d5081027d94e2100"
      url: "https://pub.dev"
    source: hosted
    version: "5.1.1"
  built_value:
    dependency: transitive
    description:
      name: built_value
      sha256: c7913a9737ee4007efedaffc968c049fd0f3d0e49109e778edc10de9426005cb
      url: "https://pub.dev"
    source: hosted
    version: "8.9.2"
  characters:
    dependency: transitive
    description:
      name: characters
      sha256: "04a925763edad70e8443c99234dc3328f442e811f1d8fd1a72f1c8ad0f69a605"
      url: "https://pub.dev"
    source: hosted
    version: "1.3.0"
  clock:
    dependency: transitive
    description:
      name: clock
      sha256: cb6d7f03e1de671e34607e909a7213e31d7752be4fb66a86d29fe1eb14bfb5cf
      url: "https://pub.dev"
    source: hosted
    version: "1.1.1"
  code_builder:
    dependency: transitive
    description:
      name: code_builder
      sha256: f692079e25e7869c14132d39f223f8eec9830eb76131925143b2129c4bb01b37
      url: "https://pub.dev"
    source: hosted
    version: "4.10.0"
  collection:
    dependency: transitive
    description:
      name: collection
      sha256: ee67cb0715911d28db6bf4af1026078bd6f0128b07a5f66fb2ed94ec6783c09a
      url: "https://pub.dev"
    source: hosted
    version: "1.18.0"
  convert:
    dependency: transitive
    description:
      name: convert
      sha256: "0f08b14755d163f6e2134cb58222dd25ea2a2ee8a195e53983d57c075324d592"
      url: "https://pub.dev"
    source: hosted
    version: "3.1.1"
  crypto:
    dependency: transitive
    description:
      name: crypto
      sha256: ff625774173754681d66daaf4a448684fb04b78f902da9cb3d308c19cc5e8bab
      url: "https://pub.dev"
    source: hosted
    version: "3.0.3"
  cupertino_icons:
    dependency: "direct main"
    description:
      name: cupertino_icons
      sha256: ba631d1c7f7bef6b729a622b7b752645a2d076dba9976925b8f25725a30e1ee6
      url: "https://pub.dev"
    source: hosted
    version: "1.0.8"
  dart_style:
    dependency: transitive
    description:
      name: dart_style
      sha256: "99e066ce75c89d6b29903d788a7bb9369cf754f7b24bf70bf4b6d6d6b26853b9"
      url: "https://pub.dev"
    source: hosted
    version: "2.3.6"
  fake_async:
    dependency: transitive
    description:
      name: fake_async
      sha256: "511392330127add0b769b75a987850d136345d9227c6b94c96a04cf4a391bf78"
      url: "https://pub.dev"
    source: hosted
    version: "1.3.1"
  file:
    dependency: transitive
    description:
      name: file
      sha256: "5fc22d7c25582e38ad9a8515372cd9a93834027aacf1801cf01164dac0ffa08c"
      url: "https://pub.dev"
    source: hosted
    version: "7.0.0"
  fixnum:
    dependency: transitive
    description:
      name: fixnum
      sha256: "25517a4deb0c03aa0f32fd12db525856438902d9c16536311e76cdc57b31d7d1"
      url: "https://pub.dev"
    source: hosted
    version: "1.1.0"
  flutter:
    dependency: "direct main"
    description: flutter
    source: sdk
    version: "0.0.0"
  flutter_lints:
    dependency: "direct dev"
    description:
      name: flutter_lints
      sha256: "9e8c3858111da373efc5aa341de011d9bd23e2c5c5e0c62bccf32438e192d7b1"
      url: "https://pub.dev"
    source: hosted
    version: "3.0.2"
  flutter_test:
    dependency: "direct dev"
    description: flutter
    source: sdk
    version: "0.0.0"
  glob:
    dependency: transitive
    description:
      name: glob
      sha256: "0e7014b3b7d4dac1ca4d6114f82bf1782ee86745b9b42a92c9289c23d8a0ab63"
      url: "https://pub.dev"
    source: hosted
    version: "2.1.2"
  leak_tracker:
    dependency: transitive
    description:
      name: leak_tracker
      sha256: "78eb209deea09858f5269f5a5b02be4049535f568c07b275096836f01ea323fa"
      url: "https://pub.dev"
    source: hosted
    version: "10.0.0"
  leak_tracker_flutter_testing:
    dependency: transitive
    description:
      name: leak_tracker_flutter_testing
      sha256: b46c5e37c19120a8a01918cfaf293547f47269f7cb4b0058f21531c2465d6ef0
      url: "https://pub.dev"
    source: hosted
    version: "2.0.1"
  leak_tracker_testing:
    dependency: transitive
    description:
      name: leak_tracker_testing
      sha256: a597f72a664dbd293f3bfc51f9ba69816f84dcd403cdac7066cb3f6003f3ab47
      url: "https://pub.dev"
    source: hosted
    version: "2.0.1"
  lints:
    dependency: transitive
    description:
      name: lints
      sha256: cbf8d4b858bb0134ef3ef87841abdf8d63bfc255c266b7bf6b39daa1085c4290
      url: "https://pub.dev"
    source: hosted
    version: "3.0.0"
  matcher:
    dependency: transitive
    description:
      name: matcher
      sha256: d2323aa2060500f906aa31a895b4030b6da3ebdcc5619d14ce1aada65cd161cb
      url: "https://pub.dev"
    source: hosted
    version: "0.12.16+1"
  material_color_utilities:
    dependency: transitive
    description:
      name: material_color_utilities
      sha256: "0e0a020085b65b6083975e499759762399b4475f766c21668c4ecca34ea74e5a"
      url: "https://pub.dev"
    source: hosted
    version: "0.8.0"
  meta:
    dependency: transitive
    description:
      name: meta
      sha256: d584fa6707a52763a52446f02cc621b077888fb63b93bbcb1143a7be5a0c0c04
      url: "https://pub.dev"
    source: hosted
    version: "1.11.0"
  package_config:
    dependency: transitive
    description:
      name: package_config
      sha256: "1c5b77ccc91e4823a5af61ee74e6b972db1ef98c2ff5a18d3161c982a55448bd"
      url: "https://pub.dev"
    source: hosted
    version: "2.1.0"
  path:
    dependency: transitive
    description:
      name: path
      sha256: "087ce49c3f0dc39180befefc60fdb4acd8f8620e5682fe2476afd0b3688bb4af"
      url: "https://pub.dev"
    source: hosted
    version: "1.9.0"
  pigeon:
    dependency: "direct main"
    description:
      name: pigeon
      sha256: be883401d09121c427ed9c5f6e96427787d93d335f55e5e2b0d780a0a22cd561
      url: "https://pub.dev"
    source: hosted
    version: "18.0.0"
  pub_semver:
    dependency: transitive
    description:
      name: pub_semver
      sha256: "40d3ab1bbd474c4c2328c91e3a7df8c6dd629b79ece4c4bd04bee496a224fb0c"
      url: "https://pub.dev"
    source: hosted
    version: "2.1.4"
  sky_engine:
    dependency: transitive
    description: flutter
    source: sdk
    version: "0.0.99"
  source_span:
    dependency: transitive
    description:
      name: source_span
      sha256: "53e943d4206a5e30df338fd4c6e7a077e02254531b138a15aec3bd143c1a8b3c"
      url: "https://pub.dev"
    source: hosted
    version: "1.10.0"
  stack_trace:
    dependency: transitive
    description:
      name: stack_trace
      sha256: "73713990125a6d93122541237550ee3352a2d84baad52d375a4cad2eb9b7ce0b"
      url: "https://pub.dev"
    source: hosted
    version: "1.11.1"
  stream_channel:
    dependency: transitive
    description:
      name: stream_channel
      sha256: ba2aa5d8cc609d96bbb2899c28934f9e1af5cddbd60a827822ea467161eb54e7
      url: "https://pub.dev"
    source: hosted
    version: "2.1.2"
  string_scanner:
    dependency: transitive
    description:
      name: string_scanner
      sha256: "556692adab6cfa87322a115640c11f13cb77b3f076ddcc5d6ae3c20242bedcde"
      url: "https://pub.dev"
    source: hosted
    version: "1.2.0"
  term_glyph:
    dependency: transitive
    description:
      name: term_glyph
      sha256: a29248a84fbb7c79282b40b8c72a1209db169a2e0542bce341da992fe1bc7e84
      url: "https://pub.dev"
    source: hosted
    version: "1.2.1"
  test_api:
    dependency: transitive
    description:
      name: test_api
      sha256: "5c2f730018264d276c20e4f1503fd1308dfbbae39ec8ee63c5236311ac06954b"
      url: "https://pub.dev"
    source: hosted
    version: "0.6.1"
  typed_data:
    dependency: transitive
    description:
      name: typed_data
      sha256: facc8d6582f16042dd49f2463ff1bd6e2c9ef9f3d5da3d9b087e244a7b564b3c
      url: "https://pub.dev"
    source: hosted
    version: "1.3.2"
  vector_math:
    dependency: transitive
    description:
      name: vector_math
      sha256: "80b3257d1492ce4d091729e3a67a60407d227c27241d6927be0130c98e741803"
      url: "https://pub.dev"
    source: hosted
    version: "2.1.4"
  vm_service:
    dependency: transitive
    description:
      name: vm_service
      sha256: b3d56ff4341b8f182b96aceb2fa20e3dcb336b9f867bc0eafc0de10f1048e957
      url: "https://pub.dev"
    source: hosted
    version: "13.0.0"
  watcher:
    dependency: transitive
    description:
      name: watcher
      sha256: "3d2ad6751b3c16cf07c7fca317a1413b3f26530319181b37e3b9039b84fc01d8"
      url: "https://pub.dev"
    source: hosted
    version: "1.1.0"
  yaml:
    dependency: transitive
    description:
      name: yaml
      sha256: "75769501ea3489fca56601ff33454fe45507ea3bfb014161abc3b43ae25989d5"
      url: "https://pub.dev"
    source: hosted
    version: "3.1.2"
sdks:
  dart: ">=3.3.4 <4.0.0"

```

</details>


### Steps to reproduce

1. download pigeon_bug.zip.
2. unzip and run pub get.
3. run ```dart run pigeon --input ./pigeon.dart```

### Expected results

generate target code

### Actual results

code generator is freezed and nothing is output.

### Code sample

```dart
@HostApi()
abstract class AndroidApi {
  TreeInfo getTreeInfo();
}

class TreeInfo {
  final Node root;

  TreeInfo(this.root);
}

class Node {
  final List<Node?> children; // not work
  // final List<String?> children; working
  Node(this.children);
}
```

[pigeon_bug.zip](https://github.com/flutter/flutter/files/15137632/pigeon_bug.zip)


### Screenshots or Videos

_No response_

### Logs

_No response_

### Flutter Doctor output

<details open><summary>Doctor output</summary>

```console
Doctor summary (to see all details, run flutter doctor -v):
[!] Flutter (Channel stable, 3.19.6, on Microsoft Windows [版本 10.0.22631.3527], locale zh-CN)
    ! Warning: `flutter` on your path resolves to D:\scoop\apps\flutter\3.19.6\bin\flutter, which is not inside your
      current Flutter SDK checkout at D:\scoop\apps\flutter\current. Consider adding D:\scoop\apps\flutter\current\bin
      to the front of your path.
    ! Warning: `dart` on your path resolves to D:\scoop\apps\flutter\3.19.6\bin\dart, which is not inside your current
      Flutter SDK checkout at D:\scoop\apps\flutter\current. Consider adding D:\scoop\apps\flutter\current\bin to the
      front of your path.
[✓] Windows Version (Installed version of Windows is version 10 or higher)
[✓] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
[✓] Chrome - develop for the web
[✓] Visual Studio - develop Windows apps (Visual Studio Community 2022 17.8.3)
[✓] Android Studio (version 2023.2)
[✓] IntelliJ IDEA Ultimate Edition (version 2024.1)
[✓] Connected device (4 available)
[✓] Network resources

! Doctor found issues in 1 category.
```

</details>


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[pigeon] Unable to generate code When a class field contains List<SelfClass?> #147454

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[pigeon] Unable to generate code When a class field contains List<SelfClass?> #147454

Description

What package does this bug report belong to?

What target platforms are you seeing this bug on?

Have you already upgraded your packages?

Dependency versions

Steps to reproduce

Expected results

Actual results

Code sample

Screenshots or Videos

Logs

Flutter Doctor output

Metadata

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

Issue actions