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Go Saito
42d23084b7
In src/vm.c: mrb_funcall_with_block
stack_extend may realloc mrb->c->stbase, if argv points on mruby's stack,
then it points invalid address after stack_extend.
e.g. src/class.c: mrb_instance_new
This code:
```ruby
class A
def initialize(a0,a1,a2,a3,a4)
a0.is_a? Array
end
end
def f(a0,a1,a2,a3,a4)
A.new(a0,a1,a2,a3,a4)
f(a0,a1,a2,a3,a4)
end
f(0,1,2,3,4)
```
is expected to get exception
```
stack level too deep. (limit=(0x40000 - 128)) (SystemStackError)
```
but get segfault.
Signed-off-by: Go Saito <gos@iij.ad.jp>