Bazel Plugin: unable to debug target due to "bazel before run task" failing

[RReichert]

Description of the bug:

Using the bazel plugin for CLion, I'm unable to debug a target that I am able to run successfully via IDE. I am faced with the following error messages:

Building debug binary
Command: bazel build --tool_tag=ijwb:CLion --compilation_mode=dbg --strip=never --dynamic_mode=off --fission=yes --copt=-g2 --copt=-O0 --color=yes --progress_in_terminal_title=no --build_event_binary_file=/tmp/intellij-bep-ba3d97a3-1a85-4b99-9cf0-551ce898190d --nobuild_event_binary_file_path_conversion --build_event_publish_all_actions -- //c:sbp-cpp-test
Computing main repo mapping: 
Loading: 
Loading: 0 packages loaded
WARNING: Build options --compilation_mode, --copt, --dynamic_mode, and 2 more have changed, discarding analysis cache (this can be expensive, see https://bazel.build/advanced/performance/iteration-speed).
Analyzing: target //c:sbp-cpp-test (0 packages loaded, 0 targets configured)
Analyzing: target //c:sbp-cpp-test (0 packages loaded, 0 targets configured)

ERROR: /home/rodrigor/Workspace/swift-nav/libsbp/c/BUILD.bazel:84:14: in cc_test rule //c:sbp-cpp-test: 
Traceback (most recent call last):
	File "/virtual_builtins_bzl/common/cc/cc_test.bzl", line 68, column 36, in _impl
	File "/virtual_builtins_bzl/common/cc/cc_test.bzl", line 33, column 44, in _legacy_cc_test_impl
	File "/virtual_builtins_bzl/common/cc/cc_binary.bzl", line 660, column 34, in cc_binary_impl
	File "/virtual_builtins_bzl/common/cc/cc_debug_helper.bzl", line 73, column 50, in create_debug_packager_actions
	File "/virtual_builtins_bzl/common/cc/cc_debug_helper.bzl", line 154, column 32, in _create_intermediate_dwp_packagers
Error in run: in call to run(), parameter 'executable' got value of type 'NoneType', want 'File, string, or FilesToRunProvider'
ERROR: /home/rodrigor/Workspace/swift-nav/libsbp/c/BUILD.bazel:84:14: Analysis of target '//c:sbp-cpp-test' failed
ERROR: Analysis of target '//c:sbp-cpp-test' failed; build aborted
INFO: Elapsed time: 0.364s, Critical Path: 0.00s
INFO: 1 process: 1 internal.
ERROR: Build did NOT complete successfully
FAILED: 
INFO: Build Event Protocol files produced successfully.

Which category does this issue belong to?

CLion

What's the simplest, easiest way to reproduce this bug? Please provide a minimal example if possible.

The following steps were run in the https://github.com/swift-nav/libsbp opensource repository.

1. clone repository and open up project with "import bazel project", generate the BUILD file with c/BUILD.bazel.
2. create a "bazel command" Run/Debug configuration with the target expression //c:sbp-cpp-test.
3. run the target ... it successfully launches executable
4. debug the target ... fails with the reported error message

Which Intellij IDE are you using? Please provide the specific version.

CLion 2025.3 (CL-253.28294.335, built on December 6, 2025)

What programming languages and tools are you using? Please provide specific versions.

C++ with Bazel

What Bazel plugin version are you using?

Bazel 8.3.1

Have you found anything relevant by searching the web?

No, seems to be a new problem.

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

Running this on a Fedora 42 (x86_64) machine.

[ujohnny]

Thank you for reporting this. We’ll get back to you in January because of the holidays.

[ujohnny]

Have a feeling that enabling bazel.clwb.debug.fission.disabled registry flag might help in this case

[RReichert]

Have a feeling that enabling bazel.clwb.debug.fission.disabled registry flag might help in this case

Thanks @ujohnny, looks like that resolved the issue. Is there a place that describes what the flag is expected to do/provide, for my own curiosity?