[Dart] Dart error

[Berk Geveci]

The following error started showing up on dartboards:

Test Nightly
        Finding Tests
        Found 58 tests
        Running Tests, one icon per test, 50 icons per line
        . == Passed     - == Failed     * == NotRun
        .....................can't read "tcl_platform(platform)": no such 
variable
can't read "tcl_platform(platform)": no such variable
    while executing
"if { $tcl_platform(platform) == "windows" } {
            # this is a windows system, use the kill command distributed 
w/Dart
            catch { exec..."
    (procedure "Test" line 113)
    invoked from within
"$Command $Model $BuildStampDir"
Coverage Nightly
        Covered LOC:         8971
        Not covered LOC:     7162
        Total LOC:           16133