RenderFlex children have non-zero flex but incoming height constraints

RenderFlex children have non-zero flex but incoming height constraints are unbounded.

https://stackoverflow.com/questions/57803737/flutter-renderflex-children-have-non-zero-flex-but-incoming-height-constraints
Nested Columnを使用したケース

https://qiita.com/qst_exe/items/2e37301ad56b35cb4bd6
SingleChildScrollViewの中にColumnを入れたケース