Automatic variable not updated

[dpiparo]

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Description

I am bringing JIRA item ROOT-10381 to the GitHub tracker since it seems relevant for the ROOT7 discussions, in particular the one about memory management (@hageboeck )

From https://root-forum.cern.ch/t/invalid-pointer-to-histograms-created-via-ttree-draw/36565 :

root [1] n->Draw("m01>>h1(100,2.8,3.4","");
root [2] h1->Draw()
root [3] n->Draw("m01>>h1(100,2.8,3.3","");
root [4] h1->Draw()

The last line crashes, because gDirectory's h1 got replaced but the variable doesn't realize that.

Reproducer

see above

ROOT version

all 6.* series

Installation method

all

Operating system

all

Additional context

No response