PdfViewer display error between screen transitions

[reddeath1]

Error displaying pdf after screen transition.. I ran out of ideas on how to solve this, as the pdf is been fetched successful from the device but when it reaches the viewer the error displayed.

Surprisingly the pdf is loaded as the error screen shows the page numbers, but can't get the view to display the pdf.

======== Exception caught by widgets library =======================================================
The following _TypeError was thrown building StreamBuilder<Matrix4>(state: _StreamBuilderBaseState<Matrix4, AsyncSnapshot<Matrix4>>#fc631):
Null check operator used on a null value

The relevant error-causing widget was: 
  PdfViewer PdfViewer:file:///Volumes/xx/lib/ui/screens/NewsPapers/Widgets/PDFViewerAdvance.dart:260:40
When the exception was thrown, this was the stack: 
#0      _PdfViewerState._guessCurrentPage (package:pdfrx/src/widgets/pdf_viewer.dart:569:27)
#1      _PdfViewerState._determineCurrentPage (package:pdfrx/src/widgets/pdf_viewer.dart:551:24)
#2      _PdfViewerState.build.<anonymous closure>.<anonymous closure> (package:pdfrx/src/widgets/pdf_viewer.dart:406:17)
#3      StreamBuilder.build (package:flutter/src/widgets/async.dart:437:81)
#4      _StreamBuilderBaseState.build (package:flutter/src/widgets/async.dart:120:48)
#5      StatefulElement.build (package:flutter/src/widgets/framework.dart:5592:27)
#6      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5480:15)
#7      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5643:11)
#8      Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#9      StatefulElement.update (package:flutter/src/widgets/framework.dart:5666:5)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#11     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6765:14)
#12     Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#13     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#14     Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#15     ProxyElement.update (package:flutter/src/widgets/framework.dart:5809:5)
#16     _InheritedNotifierElement.update (package:flutter/src/widgets/inherited_notifier.dart:105:11)
#17     Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#18     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#19     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5643:11)
#20     Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#21     StatefulElement.update (package:flutter/src/widgets/framework.dart:5666:5)
#22     Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#23     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6765:14)
#24     Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#25     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#27     StatelessElement.update (package:flutter/src/widgets/framework.dart:5556:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#29     _LayoutBuilderElement._layout.layoutCallback (package:flutter/src/widgets/layout_builder.dart:155:18)
#30     BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:2844:19)
#31     _LayoutBuilderElement._layout (package:flutter/src/widgets/layout_builder.dart:173:12)
#32     RenderObject.invokeLayoutCallback.<anonymous closure> (package:flutter/src/rendering/object.dart:2686:59)
#33     PipelineOwner._enableMutationsToDirtySubtrees (package:flutter/src/rendering/object.dart:1097:15)
#34     RenderObject.invokeLayoutCallback (package:flutter/src/rendering/object.dart:2686:14)
#35     RenderConstrainedLayoutBuilder.rebuildIfNecessary (package:flutter/src/widgets/layout_builder.dart:248:7)
#36     _RenderLayoutBuilder.performLayout (package:flutter/src/widgets/layout_builder.dart:331:5)
#37     RenderObject.layout (package:flutter/src/rendering/object.dart:2575:7)
#38     RenderBox.layout (package:flutter/src/rendering/box.dart:2389:11)
#39     RenderPadding.performLayout (package:flutter/src/rendering/shifted_box.dart:239:12)
#40     RenderObject.layout (package:flutter/src/rendering/object.dart:2575:7)
#41     RenderBox.layout (package:flutter/src/rendering/box.dart:2389:11)
#42     RenderConstrainedBox.performLayout (package:flutter/src/rendering/proxy_box.dart:280:14)
#43     RenderObject.layout (package:flutter/src/rendering/object.dart:2575:7)
#44     RenderBox.layout (package:flutter/src/rendering/box.dart:2389:11)
#45     MultiChildLayoutDelegate.layoutChild (package:flutter/src/rendering/custom_layout.dart:173:12)
#46     _ScaffoldLayout.performLayout (package:flutter/src/material/scaffold.dart:1063:7)
#47     MultiChildLayoutDelegate._callPerformLayout (package:flutter/src/rendering/custom_layout.dart:237:7)
#48     RenderCustomMultiChildLayoutBox.performLayout (package:flutter/src/rendering/custom_layout.dart:404:14)
#49     RenderObject._layoutWithoutResize (package:flutter/src/rendering/object.dart:2414:7)
#50     PipelineOwner.flushLayout (package:flutter/src/rendering/object.dart:1051:18)
#51     PipelineOwner.flushLayout (package:flutter/src/rendering/object.dart:1064:15)
#52     RendererBinding.drawFrame (package:flutter/src/rendering/binding.dart:582:23)
#53     WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:991:13)
#54     RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:448:5)
#55     SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1386:15)
#56     SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1311:9)
#57     SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1169:5)
#58     _invoke (dart:ui/hooks.dart:312:13)
#59     PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:399:5)
#60     _drawFrame (dart:ui/hooks.dart:283:31)
====================================================================================================

[espresso3389]

Fixed on 1.0.59.

[reddeath1]

Fixed on 1.0.59.

Great, let me upgrade to it.

[reddeath1]

Fixed on 1.0.59.

Didn't work, I just implemented a pop(), to navigate back from the second screen it worked on my use case.

[espresso3389]

Didn't work, I just implemented a pop(), to navigate back from the second screen it worked on my use case.

Could you give me the error log for it?

[reddeath1]

Didn't work, I just implemented a pop(), to navigate back from the second screen it worked on my use case.

Could you give me the error log for it?

Kindly see below

======== Exception caught by widgets library =======================================================
The following _TypeError was thrown building StreamBuilder<Matrix4>(dirty, state: _StreamBuilderBaseState<Matrix4, AsyncSnapshot<Matrix4>>#61ff0):
Null check operator used on a null value

The relevant error-causing widget was: 
  PdfViewer PdfViewer:file:///Volumes/***/**/lib/ui/screens/NewsPapers/Widgets/PDFViewerAdvance.dart:259:40
When the exception was thrown, this was the stack: 
#0      _PdfViewerState._calcAlternativeFitScale (package:pdfrx/src/widgets/pdf_viewer.dart:597:26)
#1      _PdfViewerState.build.<anonymous closure>.<anonymous closure> (package:pdfrx/src/widgets/pdf_viewer.dart:407:17)
#2      StreamBuilder.build (package:flutter/src/widgets/async.dart:437:81)
#3      _StreamBuilderBaseState.build (package:flutter/src/widgets/async.dart:120:48)
#4      StatefulElement.build (package:flutter/src/widgets/framework.dart:5592:27)
#5      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5480:15)
#6      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5643:11)
#7      Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#8      ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:5462:5)
#9      StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:5634:11)
#10     ComponentElement.mount (package:flutter/src/widgets/framework.dart:5456:5)
...     Normal element mounting (27 frames)
#37     Element.inflateWidget (package:flutter/src/widgets/framework.dart:4335:16)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:3840:20)
#39     _LayoutBuilderElement._layout.layoutCallback (package:flutter/src/widgets/layout_builder.dart:155:18)
#40     BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:2844:19)
#41     _LayoutBuilderElement._layout (package:flutter/src/widgets/layout_builder.dart:173:12)
#42     RenderObject.invokeLayoutCallback.<anonymous closure> (package:flutter/src/rendering/object.dart:2686:59)
#43     PipelineOwner._enableMutationsToDirtySubtrees (package:flutter/src/rendering/object.dart:1097:15)
#44     RenderObject.invokeLayoutCallback (package:flutter/src/rendering/object.dart:2686:14)
#45     RenderConstrainedLayoutBuilder.rebuildIfNecessary (package:flutter/src/widgets/layout_builder.dart:248:7)
#46     _RenderLayoutBuilder.performLayout (package:flutter/src/widgets/layout_builder.dart:331:5)
#47     RenderObject.layout (package:flutter/src/rendering/object.dart:2575:7)
#48     RenderBox.layout (package:flutter/src/rendering/box.dart:2389:11)
#49     RenderPadding.performLayout (package:flutter/src/rendering/shifted_box.dart:239:12)
#50     RenderObject.layout (package:flutter/src/rendering/object.dart:2575:7)
#51     RenderBox.layout (package:flutter/src/rendering/box.dart:2389:11)
#52     RenderConstrainedBox.performLayout (package:flutter/src/rendering/proxy_box.dart:280:14)
#53     RenderObject.layout (package:flutter/src/rendering/object.dart:2575:7)
#54     RenderBox.layout (package:flutter/src/rendering/box.dart:2389:11)
#55     MultiChildLayoutDelegate.layoutChild (package:flutter/src/rendering/custom_layout.dart:173:12)
#56     _ScaffoldLayout.performLayout (package:flutter/src/material/scaffold.dart:1063:7)
#57     MultiChildLayoutDelegate._callPerformLayout (package:flutter/src/rendering/custom_layout.dart:237:7)
#58     RenderCustomMultiChildLayoutBox.performLayout (package:flutter/src/rendering/custom_layout.dart:404:14)
#59     RenderObject._layoutWithoutResize (package:flutter/src/rendering/object.dart:2414:7)
#60     PipelineOwner.flushLayout (package:flutter/src/rendering/object.dart:1051:18)
#61     PipelineOwner.flushLayout (package:flutter/src/rendering/object.dart:1064:15)
#62     RendererBinding.drawFrame (package:flutter/src/rendering/binding.dart:582:23)
#63     WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:991:13)
#64     RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:448:5)
#65     SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1386:15)
#66     SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1311:9)
#67     SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1169:5)
#68     _invoke (dart:ui/hooks.dart:312:13)
#69     PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:399:5)
#70     _drawFrame (dart:ui/hooks.dart:283:31)
====================================================================================================