[DrJava] [ drjava-Bugs-1151966 ] Interactions pane doesn't process nulls in varargs correctly

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Bugs item #1151966, was opened at 2005-02-25 18:00
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Category: DynamicJava
Group: Serious
Status: Open
Resolution: None
Priority: 5
Submitted By: Stephen Wong (sbwong)
Assigned to: Sid Byrd (sidb)
Summary: Interactions pane doesn't process nulls in varargs correctly

Initial Comment:
When a method takes a vararg and is called with a null 
as the *first* parameter, the code will compile correctly 
and run correctly when called from within a program but 
when tested from the Interactions Pane it will fail with 
a "NullPointerException: "  with no additional info 
returned.

That is, suppose we have

void test(Object...x) {...}

Calling test.(null, yadda, yadda) will work fine from 
inside a program, but this line will fail from the 
Interactions Pane.

On the other hand,

test(yadda, null, yadda) works fine always.

Perhaps relatedly, test(null) runs fine from the 
Interactions pane but won't compile.    I'm not sure it is 
supposed to compile and thus should not run in the 
Interactions Pane.

I have attached a test file that demonstrates all of this.

I have labelled the problem "serious" because it creates 
inconsistent output for a reasonable input that someone 
might try (as in that what happened in class today) plus 
the fact that the error message is singularly unhelpful.

-- Stephen Wong




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