* fix potential deadlock Signed-off-by: Shihao Xia <charlesxsh@hotmail.com> * fix deadlock Signed-off-by: Shihao Xia <charlesxsh@hotmail.com> * Update promql/engine_test.go Co-authored-by: Ganesh Vernekar <15064823+codesome@users.noreply.github.com> Signed-off-by: Shihao Xia <charlesxsh@hotmail.com> Co-authored-by: Ganesh Vernekar <15064823+codesome@users.noreply.github.com>