Errors when importing getter and setter from different libraries

[stereotype441]

Attempting to import a getter named x and setter named x= from different libraries produces inconsistent results in the VM. If the getter is imported first, and there is no import prefix, there is no problem. Otherwise, an attempt to use the getter results in the following runtime error: No top-level getter 'x' declared. (or, if the import prefix is p: No top-level getter 'p.x' declared.)

These errors are incorrect. There's nothing in the spec requiring a getter and its corresponding setter to be imported from the same library; the two entities have different names so they should not conflict with each other.

Dart2js and the analyzer also mishandle this situation, but not in the same way.

I will submit shared tests shortly demonstrating the bug.

[mhausner]

Have the tests been checked in?

[stereotype441]

@mhausner yes, they were added in 4896fea.

[mhausner]

Proposed fix: https://codereview.chromium.org/1752203002/

[mhausner]

Committed patchset #2 (id:20001) manually as
5a0a097 (presubmit successful).

https://codereview.chromium.org/1752203002/