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Michael Goderbauer dca7480bd3 Don't crash on iOS if there is only a single SemanticsNode (flutter/engine#4128) 
* Don't crash if there is only a single SemanticsNode

Previously, the code assumed that the root SemanticsNode will allways have a child. This is not true as can be seen in the hello_world example app, which would crash when a11y is turned on.

* review comment
2017-09-20 14:17:50 -07:00
..
src/flutter
Don't crash on iOS if there is only a single SemanticsNode (flutter/engine#4128)
2017-09-20 14:17:50 -07:00