As discussed here: https://github.com/WebAssembly/design/issues/825#issuecomment-254917715 Our currently do.
To be clear: this is only for the WebAssembly.{Compile/Runtime/Link}Error types. Other WebAssembly constructors say "this constructor cannot be called as a function without new".
Created attachment 305084 [details] patch
Comment on attachment 305084 [details] patch r=me
Comment on attachment 305084 [details] patch Clearing flags on attachment: 305084 Committed r214259: <http://trac.webkit.org/changeset/214259>
All reviewed patches have been landed. Closing bug.