[v624][RF] Handle nullptr or empty norm set ambiguity in RooAbsReal::getVal#8372
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guitargeek merged 2 commits intoroot-project:v6-24-00-patchesfrom Jun 8, 2021
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The downsteam code, -- like RooAddPdf::getValV for example -- assume that a nullptr is passed when no normalization is requested. The case of an empty norm set is not handled correctly in RooAddPdf::getValV, leading to wrong results. However, some calling code passes an empty norm set to RooAbsReal::getVal instead of a `nullptr` in an attempt to disable normalization. This commit suggests to solve this ambiguity at the highest possible level: right at the beginning of RooAbsReal::getVal. If the normalization set is empty, the pointer pointing to it will be set to `nullptr`. This fixes issue root-project#8307.
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Backport of #8364.
The downsteam code, -- like RooAddPdf::getValV for example -- assume
that a nullptr is passed when no normalization is requested. The case of
an empty norm set is not handled correctly in RooAddPdf::getValV,
leading to wrong results.
However, some calling code passes an empty norm set to
RooAbsReal::getVal instead of a
nullptrin an attempt to disablenormalization.
This commit suggests to solve this ambiguity at the highest possible
level: right at the beginning of RooAbsReal::getVal. If the
normalization set is empty, the pointer pointing to it will be set to
nullptr.This fixes issue #8307.
To give some context: the code in RooAddPdf that doesn't handle the ambiguity correctly was introduced in f6d1543, which was also backported to 6.24. Hence, a backport to 6.24 is necessary also for this PR.