Strange behaviour with ds.Boole when V2 is a negative value

[davraam]

When we set the argument V2 to a single negative value, the dsBoole doesn't creates the binary variable correctly, even if V2 is within the range of the variable V1. But in addition has a strange behaviour as it overwrites the input variable V1 (this can be a column in the original dataset).

Here is an example using the SURVIVAL.EXPAND_WITH_MISSING data. Example 1 works as expected but example 2 has this strange bahaviour.

ds.summary("D$age.60")

# Example 1: V2 is a positive integer value, within the range of V1
ds.Boole(V1='D$age.60', V2='1', Boolean.operator = "<", 
         numeric.output = TRUE, newobj = "boole_1")
ds.table("boole_1")
ds.summary("D$age.60")

# Example 2: V2 is a negative integer value, within the range of V1
ds.Boole(V1='D$age.60', V2='-5', Boolean.operator = "<", 
         numeric.output = TRUE, newobj = "boole_2")
ds.table("boole_2")
ds.summary("D$age.60")  

All the examples below work fine

# Example 3: V2 is zero, within the range of V1
ds.Boole(V1='D$age.60', V2='0', Boolean.operator = "<", 
numeric.output = TRUE, newobj = "boole_3")
ds.table("boole_3")
ds.summary("D$age.60")

# Example 4: V2 is a positive numeric value, within the range of V1
ds.Boole(V1='D$age.60', V2='7.6', Boolean.operator = "<", 
         numeric.output = TRUE, newobj = "boole_4")
ds.table("boole_4")
ds.summary("D$age.60")

# Example 5: V2 is a positive value, outside the range of V1
ds.Boole(V1='D$age.60', V2='70', Boolean.operator = "<", 
         numeric.output = TRUE, newobj = "boole_5")
ds.table("boole_5")
ds.summary("D$age.60")