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This patch fixes a bug in which 'Type_Key on a subtype or derived type could sometimes access the wrong source buffer. The following test should compile and run silently. package P is type My_Int is range 1 .. 10; for My_Int'Size use 10; end P; with P; use P; package Q is type New_My_Int is new My_Int; for New_My_Int'Size use 20; end Q; with Q; use Q; package R is subtype S is New_My_Int; end R; with R; use R; procedure Main is Key : constant String := S'Type_Key; begin null; end Main; Tested on x86_64-pc-linux-gnu, committed on trunk 2017-04-27 Bob Duff <duff@adacore.com> * sem_attr.adb (Compute_Type_Key): Don't walk representation items for irrelevant types, which could be in a different source file.
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