Failed to load module 'Helper Bundle' after running some test cases in EarlGrey2

Hello,
My Application crashed at the GREYHostApplicationDistantObject extension after running some test cases and got "Thread 1: EXC_BAD_ACCESS (code=2, address=0x7ff80d9f4ac8)". When I try to print "Bundle(for: (typeof:self))", I got

> warning: Swift error in scratch context: error: failed to load module 'Here is my Helper Bundle'
.
Shared Swift state for BizX Mobile has developed fatal errors and is being discarded.
REPL definitions and persistent names/types will be lost.
error: expression failed to parse:
unknown error

This crash repeats whenever I calls a instance method of a swift class which is inherited from a base class in another framework.

Thanks.

Review the GREYHostApplicationDistantObject extension and the Bundle(for: (typeof:self)) call while reproducing the EarlGrey2 test crash involving a Swift class inherited from another framework. Done means the helper module loads and calling the instance method no longer causes EXC_BAD_ACCESS; no test file is named in the issue.

Written by the indexing model from the issue text.