[v638][RF][HF] Check for consistent datasets across channels before combining #21140
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This makes problems like the one reported in root-project#21066 easier to debug by the user, because there will be a meaningful error message like this instead of a crash: ```txt [#2] FATAL:HistFactory -- ERROR: Inconsistent datasets across channel workspaces. Workspace for channel "SR_3L_0RC_binary_binary_3L_0RC" does not match the datasets in channel "SR_2L_mva_2L_multiclass_ttll". Missing datasets: - obsData All channel workspaces must contain exactly the same datasets. terminate called after throwing an instance of 'RooStats::HistFactory::hf_exc' what(): HistFactory - Exception ``` (cherry picked from commit e37fefd)
guitargeek
merged commit e1f159e
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root-project:v6-38-00-patches
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This makes problems like the one reported in #21066 easier to debug by the user, because there will be a meaningful error message like this instead of a crash:
[#2] FATAL:HistFactory -- ERROR: Inconsistent datasets across channel workspaces. Workspace for channel "SR_3L_0RC_binary_binary_3L_0RC" does not match the datasets in channel "SR_2L_mva_2L_multiclass_ttll". Missing datasets: - obsData All channel workspaces must contain exactly the same datasets. terminate called after throwing an instance of 'RooStats::HistFactory::hf_exc' what(): HistFactory - Exception(cherry picked from commit e37fefd)