dart2js TypeImpl overrides operator ==

[floitschG]

The equality operator is overridden for dart2js' Type implementation TypeIpml.

This means that it cannot be used in switch statements or as keys in constant maps.

See issue #15295 and issue #17123.

[floitschG]

It's not clear if this is a bug or not. The VM does not override it, and this leads to incompatibility between VM and dart2js.

[rakudrama]

Marked this as being blocked by #21553.

[floitschG]

Issue #23009 has been merged into this issue.

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cc @karlklose.
cc @johnniwinther.

[jakemac53]

Just ran into this as well. It seems pretty clear to me that this is a bug because it causes programs which are completely valid in the vm to fail in dart2js.