Xccov: Code coverage report is empty when running tests from command line with xcodebuild test-without-building

Number:rdar://37745670 Date Originated:21-Feb-2018 05:13 PM
Status:Open Resolved:
Product:Developer Tools Product Version:Xcode 9.3 beta 3
Classification:Serious Bug Reproducible:Always
When building an iOS project from command line using xcodebuild build-for-testing and then running tests with xcodebuild test-without-building the code coverage files are empty.

Steps to Reproduce:
1. Build project with:
xcodebuild -scheme Codecov -destination 'platform=iOS Simulator,name=iPhone 8,OS=11.3' -enableCodeCoverage YES build-for-testing
2. Run tests on resulting .xctestrun bundle:
xcodebuild -destination 'platform=iOS Simulator,name=iPhone 8,OS=11.3' -enableCodeCoverage YES -xctestrun /path/to/DerivedData/Codecov-azxfrlmhznktvjavwttdxmosuzdn/Build/Products/Codecov_iphonesimulator11.0-x86_64.xctestrun test-without-building
3. Check code coverage with xccov:
xcrun xccov view  /path/to/DerivedData/Codecov-azxfrlmhznktvjavwttdxmosuzdn/Logs/Test/9121DDEF-52B1-4BC5-9EBC-5E06E7693EF3.xccovreport

Expected Results:
4. See code coverage information

Actual Results:
4. Results are empty:

Name Coverage
---- --------

Xcode 9.3 beta 3

When running xccov with results generated from running tests from Xcode the output is what is expected:

Attaching the code of the project and contents of DerivedData after running test in step #2

A version of the same issue was filed before introduction of xccov -  rdar://36907005


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