A common error is when someone tries to export a blocking function. This
is not possible with the coroutines scheduler. Previously, it resulted
in an error like this:
panic: trying to make exported function async: messageHandler
With this change, the error is much better and shows where it comes from
exactly:
/home/ayke/tmp/export-async.go:8: blocking operation in exported function: messageHandler
traceback:
messageHandler
/home/ayke/tmp/export-async.go:9:5
main.foo
/home/ayke/tmp/export-async.go:15:2
runtime.chanSend
/home/ayke/src/github.com/tinygo-org/tinygo/src/runtime/chan.go:494:12
This should make it easier to identify and fix the problem. And it
avoids a compiler panic, which is a really bad way of showing
diagnostics.
3d13f9cfe1