xmlsecurity_signing2 unit test failure - strange error

[Marc <timepilot3000@xxxxxxxxx>]

When building unit tests, I get a failure on xmlsecurity_signing2, but the error message is missing (?). Here's the output, with repeats removed:

[build CUT] xmlsecurity_signing2
[_RUN_____] `anonymous namespace'::Test::test
warn:io.connector:12396:12324:io/source/connector/connector.cxx:93: Connector : couldn't connect to pipe "oootest12396": 1
unknown:0:`anonymous namespace'::Test::test
An uncaught UNO exception
- com.sun.star.lang.DisposedException: {Message: "Binary URP bridge disposed during call at C:/cygwin/home/Marc/lode/dev/core/binaryurp/source/bridge.cxx:611", Context: @0000007B6178A8A0}

`anonymous namespace'::Test::test finished in: 16963ms
##Failure Location unknown## : Error
Test name: `anonymous namespace'::Test::test
An uncaught UNO exception
- com.sun.star.lang.DisposedException: {Message: "Binary URP bridge disposed during call at C:/cygwin/home/Marc/lode/dev/core/binaryurp/source/bridge.cxx:611", Context: @0000007B6178A8A0}

Failures !!!
Run: 1   Failure total: 2   Failures: 0   Errors: 2
warn:binaryurp:12396:12324:binaryurp/source/bridge.cxx:843: undisposed bridge "" in state 2, potential deadlock ahead

Any ideas what is going on?

Thanks,

Marc