C++ Coverage on Linux is broken

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Description of the problem / feature request:

When I execute the bazel coverage command with version 0.24.1, I can generate a valid coverage.dat file, but when using a version higher than 0.24.1, the coverage.dat file is empty. This problem exists only when generating coverage for the C++ language.

$ ll bazel-testlogs/id_test/ total 3136 drwxr-xr-x 2 admin admin 4096 Sep 19 15:29 ./ drwxr-xr-x 3 admin admin 4096 Sep 19 15:07 …/ -r-xr-xr-x 1 admin admin 581600 Sep 19 15:07 baseline_coverage.dat* -r-xr-xr-x 1 admin admin 68477 Sep 19 15:29 coverage.dat* -r-xr-xr-x 1 admin admin 179 Sep 19 15:29 test.cache_status* -r-xr-xr-x 1 admin admin 2539566 Sep 19 15:29 test.log* -rw-r–r-- 1 admin admin 904 Sep 19 15:28 test.xml $ bazel version Build label: 0.24.1 Build target: bazel-out/k8-opt/bin/src/main/java/com/google/devtools/build/lib/bazel/BazelServer_deploy.jar Build time: Tue Apr 2 16:29:26 2019 (1554222566) Build timestamp: 1554222566 Build timestamp as int: 1554222566

$ ll bazel-testlogs/id_test/ total 4108 drwxr-xr-x 2 admin admin 4096 Sep 19 15:25 ./ drwxr-xr-x 3 admin admin 4096 Sep 19 15:07 …/ -r-xr-xr-x 1 admin admin 581600 Sep 19 15:07 baseline_coverage.dat* -r-xr-xr-x 1 admin admin 0 Sep 19 15:25 coverage.dat* -r-xr-xr-x 1 admin admin 176 Sep 19 15:25 test.cache_status* -r-xr-xr-x 1 admin admin 3600923 Sep 19 15:25 test.log* -rw-r–r-- 1 admin admin 904 Sep 19 15:25 test.xml $ bazel version Build label: 0.25.0 Build target: bazel-out/k8-opt/bin/src/main/java/com/google/devtools/build/lib/bazel/BazelServer_deploy.jar Build time: Wed May 1 21:45:01 2019 (1556747101) Build timestamp: 1556747101 Build timestamp as int: 1556747101

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Feature requests: what underlying problem are you trying to solve with this feature?

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Bugs: what’s the simplest, easiest way to reproduce this bug? Please provide a minimal example if possible.

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What operating system are you running Bazel on?

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What’s the output of bazel info release?

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If bazel info release returns “development version” or “(@non-git)”, tell us how you built Bazel.

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What’s the output of git remote get-url origin ; git rev-parse master ; git rev-parse HEAD ?

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Have you found anything relevant by searching the web?

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Places to look:

• StackOverflow: http://stackoverflow.com/questions/tagged/bazel
• GitHub issues: https://github.com/bazelbuild/bazel/issues
• email threads on https://groups.google.com/forum/#!forum/bazel-discuss

Any other information, logs, or outputs that you want to share?

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If the files are large, upload as attachment or provide link.

[mfourieshieldai]

Really appreciate a fix here.

[iphydf]

Not working on either Linux or Mac with Bazel 3.0.0.