Author: Dave Lyons
Year: 1989
... described a problem with zero-length text scraps fixed since System 5.0.3.
Apple II
Technical Notes
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Developer Technical Support
Apple IIgs
#59: Do Not Create Zero-Length Text Scraps
Revised by: Dave Lyons January 1991
Written by: Dave Lyons July 1989
This Technical Note described a problem with zero-length text scraps.
Changed since July 1989: This Note is obsolete beginning with System Software
5.0.3. There is no longer a problem with creating a text scrap of length zero.
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In System Software 5.0.3 and later, LEFromScrap no longer trashes memory if you
create a text scrap (scrap type 0) with length zero.
Further Reference
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o Apple IIgs Toolbox Reference, Volume 2