Running a subset of gtests, such as `make test TEST=gtest:Align`

passes the tests, but errors when printing results.

Finished running test 'gtest:Align/server'
Test report is stored in /scratch/kab/gitsb/can_align_up/fastdebug/test-results/gtest_Align_server
/usr/bin/expr: syntax error: missing argument after ‘+’
/usr/bin/bash: line 1: printf: : invalid number
RunTests.gmk:1281: recipe for target 'run-test-report' failed
make[3]: *** [run-test-report] Error 1
make/Main.gmk:807: recipe for target 'test' failed
make[2]: *** [test] Error 2

ERROR: Build failed for target 'test in configuration 'linux-x64' (exit code 2)