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[core] fix accessing empty vector #20221

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Merged
merged 1 commit into from
Oct 30, 2025
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[core] fix accessing empty vector #20221

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4 changes: 2 additions & 2 deletions core/metacling/src/TCling.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -5484,7 +5484,7 @@ Longptr_t TCling::ExecuteMacro(const char* filename, EErrorCode* error)
const char* TCling::GetTopLevelMacroName() const
{
Warning("GetTopLevelMacroName", "Must change return type!");
return fCurExecutingMacros.back();
return fCurExecutingMacros.empty() ? nullptr : fCurExecutingMacros.back();
}

////////////////////////////////////////////////////////////////////////////////
Expand Down Expand Up @@ -5535,7 +5535,7 @@ const char* TCling::GetCurrentMacroName() const
Warning("GetCurrentMacroName", "Must change return type!");
#endif
#endif
return fCurExecutingMacros.back();
return fCurExecutingMacros.empty() ? nullptr : fCurExecutingMacros.back();
}

////////////////////////////////////////////////////////////////////////////////
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