Chris Bracken 9555fe0167 Improve error message when kernel not set (flutter/engine#6924) ...

Pushes the check up front so that we don't always land on the
application_kernel_list_asset error message, which may be misleading to
readers.

Also switches the empty check to only emit in debug builds, since this
is almost certainly not a runtime error but a programmer error.

2018-11-26 11:29:56 -08:00

..

src/flutter

Improve error message when kernel not set (flutter/engine#6924)

2018-11-26 11:29:56 -08:00