Flutter keeps throwing an error after adding local navigator

[Lasslos]

Hey Guys,

the title descries my problem. I made a few differences in the way that my routes work, since I wanted a more object-oriented way. I don't know what the f*** is going on, since I can't find any relevant differences.

• repo:
• Error:
  `Performing hot restart... 1,062ms
  Restarted application in 1,062ms.
  ══╡ EXCEPTION CAUGHT BY RENDERING LIBRARY ╞═════════════════════════════════════════════════════════
  The following assertion was thrown during performResize():
  Assertion failed:
  file:///home/laslo/snap/flutter/common/flutter/packages/flutter/lib/src/widgets/overlay.dart:720:12
  constraints.biggest.isFinite
  is not true

The relevant error-causing widget was:
Navigator-[LabeledGlobalKey#c12c1]
file:///home/laslo/Development/website/lib/helpers/local_navigator.dart:5:31

When the exception was thrown, this was the stack:
dart-sdk/lib/internal/js_dev_runtime/private/ddc_runtime/errors.dart 236:49 throw
dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/errors.dart 29:3 assertFailed
packages/flutter/src/widgets/overlay.dart 720:23 computeDryLayout
packages/flutter/src/rendering/box.dart 2332:12 performResize
packages/flutter/src/rendering/object.dart 1758:9 layout
packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout
packages/flutter/src/rendering/object.dart 1779:7 layout
packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout
packages/flutter/src/rendering/object.dart 1779:7 layout
packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout
packages/flutter/src/rendering/object.dart 1779:7 layout
packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout
packages/flutter/src/rendering/object.dart 1779:7 layout
packages/flutter/src/rendering/shifted_box.dart 233:5 performLayout
packages/flutter/src/rendering/object.dart 1779:7 layout
packages/flutter/src/rendering/layout_helper.dart 54:10 layoutChild
packages/flutter/src/rendering/flex.dart 896:45 [_computeSizes]
packages/flutter/src/rendering/flex.dart 931:32 performLayout
packages/flutter/src/rendering/object.dart 1779:7 layout
packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout
packages/flutter/src/rendering/object.dart 1779:7 layout
packages/flutter/src/rendering/layout_helper.dart 54:10 layoutChild
packages/flutter/src/rendering/flex.dart 829:43 [_computeSizes]
packages/flutter/src/rendering/flex.dart 931:32 performLayout
packages/flutter/src/rendering/object.dart 1779:7 layout
packages/flutter/src/widgets/layout_builder.dart 362:7 performLayout
packages/flutter/src/rendering/object.dart 1779:7 layout
packages/flutter/src/rendering/custom_layout.dart 171:10 layoutChild
packages/flutter/src/material/scaffold.dart 937:7 performLayout
packages/flutter/src/rendering/custom_layout.dart 240:7 [_callPerformLayout]
packages/flutter/src/rendering/custom_layout.dart 404:14 performLayout
packages/flutter/src/rendering/object.dart 1779:7 layout
packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout
packages/flutter/src/rendering/object.dart 1779:7 layout
packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout
packages/flutter/src/rendering/proxy_box.dart 1369:11 performLayout
packages/flutter/src/rendering/object.dart 1779:7 layout
packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout
packages/flutter/src/rendering/object.dart 1779:7 layout
packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout
packages/flutter/src/rendering/object.dart 1779:7 layout
packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout
packages/flutter/src/rendering/object.dart 1779:7 layout
packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout
packages/flutter/src/rendering/object.dart 1779:7 layout
packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout
packages/flutter/src/rendering/object.dart 1779:7 layout
packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout
packages/flutter/src/rendering/object.dart 1779:7 layout
packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout
packages/flutter/src/rendering/object.dart 1779:7 layout
packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout
packages/flutter/src/rendering/proxy_box.dart 3370:13 performLayout
packages/flutter/src/rendering/object.dart 1779:7 layout
packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout
packages/flutter/src/rendering/object.dart 1779:7 layout
packages/flutter/src/widgets/overlay.dart 743:14 performLayout
packages/flutter/src/rendering/object.dart 1779:7 layout
packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout
packages/flutter/src/rendering/object.dart 1779:7 layout
packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout
packages/flutter/src/rendering/object.dart 1779:7 layout
packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout
packages/flutter/src/rendering/object.dart 1779:7 layout
packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout
packages/flutter/src/rendering/object.dart 1779:7 layout
packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout
packages/flutter/src/rendering/object.dart 1779:7 layout
packages/flutter/src/rendering/proxy_box.dart 116:7 performLayout
packages/flutter/src/rendering/object.dart 1779:7 layout
packages/flutter/src/rendering/view.dart 153:7 performLayout
packages/flutter/src/rendering/object.dart 1636:7 [_layoutWithoutResize]
packages/flutter/src/rendering/object.dart 881:17 flushLayout
packages/flutter/src/rendering/binding.dart 462:19 drawFrame
packages/flutter/src/widgets/binding.dart 876:13 drawFrame
packages/flutter/src/rendering/binding.dart 328:5 [_handlePersistentFrameCallback]
packages/flutter/src/scheduler/binding.dart 1144:15 [_invokeFrameCallback]
packages/flutter/src/scheduler/binding.dart 1082:9 handleDrawFrame
packages/flutter/src/scheduler/binding.dart 865:7
dart-sdk/lib/_internal/js_dev_runtime/private/isolate_helper.dart 48:19 internalCallback

The following RenderObject was being processed when the exception was fired: _RenderTheatre#f361e NEEDS-LAYOUT NEEDS-PAINT NEEDS-COMPOSITING-BITS-UPDATE:
creator: _Theatre ← Overlay-[LabeledGlobalKey#33f5c] ← UnmanagedRestorationScope ←
_FocusMarker ← Semantics ← FocusScope ← AbsorbPointer ← Listener ← HeroControllerScope ←
Navigator-[LabeledGlobalKey#c12c1] ← ColoredBox ← Padding ← ⋯
parentData: (can use size)
constraints: BoxConstraints(w=853.6, 0.0<=h<=Infinity)
size: MISSING
skipCount: 0
textDirection: ltr
This RenderObject had the following descendants (showing up to depth 5):
onstage 1: RenderIgnorePointer#f3ffd NEEDS-LAYOUT NEEDS-PAINT NEEDS-COMPOSITING-BITS-UPDATE
child: RenderBlockSemantics#34b3d NEEDS-LAYOUT NEEDS-PAINT NEEDS-COMPOSITING-BITS-UPDATE
child: RenderExcludeSemantics#2164b NEEDS-LAYOUT NEEDS-PAINT NEEDS-COMPOSITING-BITS-UPDATE
child: RenderSemanticsGestureHandler#7397d NEEDS-LAYOUT NEEDS-PAINT NEEDS-COMPOSITING-BITS-UPDATE
child: RenderPointerListener#1876c NEEDS-LAYOUT NEEDS-PAINT NEEDS-COMPOSITING-BITS-UPDATE
onstage 2: RenderSemanticsAnnotations#ac7bc NEEDS-LAYOUT NEEDS-PAINT NEEDS-COMPOSITING-BITS-UPDATE
child: RenderOffstage#457cb NEEDS-LAYOUT NEEDS-PAINT NEEDS-COMPOSITING-BITS-UPDATE
child: RenderSemanticsAnnotations#3a33e NEEDS-LAYOUT NEEDS-PAINT NEEDS-COMPOSITING-BITS-UPDATE
child: RenderRepaintBoundary#ec262 NEEDS-LAYOUT NEEDS-PAINT NEEDS-COMPOSITING-BITS-UPDATE
child: RenderFractionalTranslation#87cf9 NEEDS-LAYOUT NEEDS-PAINT NEEDS-COMPOSITING-BITS-UPDATE
no offstage children
════════════════════════════════════════════════════════════════════════════════════════════════════`

[Lasslos]

I somehow fixed it. It doesn't appear anymore.