@main[]

1. ^show[+]
2. ^show[-]
3. ^show[ + ]
4. ^show[ - ]

5. ^show[-1.]
6. ^show[-1.1]

space shown, problem_source used (as before):
7. ^show[ +4000000000]
same exception, but inside pa_atoui:
8. ^show[ +8000000000]

another exception, without problem_source (and space):
d1. ^try-catch{^date::create[-4000000000-12-01]}
d2. ^try-catch{^date::create[ +4000000000-12-01]}

another exception, inside pa_atoui, without even sign:
d3. ^try-catch{^date::create[ +8000000000-12-01]}
d4. ^try-catch{^date::create[ -8000000000-12-01]}

@show[s]
^try-catch{^s.int[]} ^try-catch{^s.double[]}