Workbench disappears on SaveNexusProcessed

[jclarkeSTFC]

Original reporter: Lauren Matthews/ISIS

Describe the bug

Run this script, say good night to Workbench:

w1=Load("SANS2D00089445.nxs",LoadMonitors=True)
w2=FilterByLogValue('w1','Julabo_1_ext',50,55)
w3=Rebin(w2,'0.0,100.0,10000.0',PreserveEvents=False)
w4=1.0*mtd['w1_monitors']
ConjoinWorkspaces('w4','w3')
SaveNexusProcessed('w4',"SANS2D00089445-temp6.nxs")

Further info:

this code crashes my mantid session
if i change the third line to:
w3=Rebin(w2,'0.0,100.0,100000.0',PreserveEvents=False)
then it behaves itself.

Expected behavior

No crash

Platform/Version (please complete the following information):

• OS: Windows
• OS Version: 10, 11
• Mantid Version 6.9, 6.10