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Two FireMonkey nasties

Delphi Haven – As the title says, here’s two little FireMonkey nasties I’ve got round to QC’ing: TBitmap.LoadFromFile does not raise an exception when the file does not exist – instead, it just silently returns (see QC 102636). TFmxObject.Children (which is equivalent to TWinControl.Controls in the the VCL) returns nil on an out-of-range index rather than raising an exception. Combined with the fact the ‘as’ operator accepts a nil source, this can quickly cause nasty, generic access violations on typos rather than a clean exception that shows where the error actually lies ...
Favorite? Off-Topic? Chris Rolliston @ 2012-01-20 19:57


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