Fix PluginService segfault at initialize when LD_LIBRARY_PATH is not defined

I noticed by chance that when LD_LIBRARY_PATH is not defined and the PluginService is initialized we get a segfault.

This happens because I had (the equivalent of)

std::string_view s{std::getenv("LD_LIBRARY_PATH")};

but std::getenv returns nullptr if the variable is not defined and std::string_view{nullptr} segfaults.

changed milestone to %v36r5

added lhcb-gaudi-head label

• [2022-03-24 00:04] Validation started with lhcb-gaudi-head#3196
• [2022-03-24 00:34] Validation started with lhcb-run2-gaudi-head#295
• [2022-03-25 00:06] Validation started with lhcb-gaudi-head#3197
• [2022-03-25 00:39] Validation started with lhcb-run2-gaudi-head#296

approved this merge request

merged

mentioned in commit e5a28ebe

mentioned in issue #229

mentioned in merge request lhcb/LHCb!3528 (merged)