[Webkit-unassigned] [Bug 287397] Regression: dart2wasm hello world no longer runs after upgrading JSC

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=287397

--- Comment #3 from Martin Kustermann <kustermann.martin at gmail.com> ---
>From my understanding it's very intentional that the GC extension allows globals to be composed objects of other (previously defined) globals - allowing the creation of DAG like data structure in the globals section.

I can see that there seems to be two different specs
* https://webassembly.github.io/spec/core/valid/instructions.html#constant-expressions
* https://webassembly.github.io/gc/core/valid/instructions.html#constant-expressions

The ladder has a much longer "Constant Expression" section which says
"""
Currently, constant expressions occurring in globals are further constrained in that contained 
instructions are only allowed to refer to imported or previously defined globals. 
...
"""

So the "or previously defined globals" is the key here.

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