bazel_debug_template

• Run this in the root of your workspace to find the target of bazel-cpp-template symlink that Bazel creates based. These symlinks are documented here:

readlink -n bazel-cpp-template

• Put the output of that command in launch.json's sourcemap section:

"sourceMap": {
        "[output of readlink -n bazel-cpp-template]": "${workspaceFolder}/"
 }

Example:

"sourceMap": {
        "/private/var/tmp/_bazel_ari/asdfasdfasdfasdfasdfgadfgasdg/execroot/__main__": "${workspaceFolder}/"
 }