369ce90d2c
Currently if morestack on g0 happens the wasm runtime prints
"RuntimeError: memory access out of bounds", which is quite misleading.
By switching to a crash stack we can get better stacktraces
for the error.
There is no way to automate tests for this feature on wasm, since
TestG0StackOverflow relies on spawning a subprocess which is not
supported by the wasm port.
The way I got this tested manually is to comment everything in
TestG0StackOverflow, leaving just runtime.G0StackOverflow().
Then it is a matter of invoking the test:
GOOS=js GOARCH=wasm go test runtime -v -run=TestG0StackOverflow
Change-Id: If450f3ee5209bb32efc1abd0a34b1cc4a29d0c46
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