[Ada] Crash on object initialization that is call to expression function
This patch fixes a compiler abort on an object declaration for a class-wide type whose expression is a call to an expression function that returns type extension. 2019-08-19 Ed Schonberg <schonberg@adacore.com> gcc/ada/ * sem_res.adb (Resolve_Call): A call to an expression function freezes when expander is active, unless the call appears within the body of another expression function, gcc/testsuite/ * gnat.dg/expr_func9.adb: New testcase. From-SVN: r274662
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2019-08-19 Ed Schonberg <schonberg@adacore.com>
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* sem_res.adb (Resolve_Call): A call to an expression function
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freezes when expander is active, unless the call appears within
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the body of another expression function,
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2019-08-19 Dmitriy Anisimkov <anisimko@adacore.com>
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* libgnat/s-os_lib.ads, libgnat/s-os_lib.adb (To_Ada, To_C): New
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@ -6314,13 +6314,15 @@ package body Sem_Res is
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-- an expression function may appear when it is part of a default
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-- expression in a call to an initialization procedure, and must be
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-- frozen now, even if the body is inserted at a later point.
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-- Otherwise, the call freezes the expression if expander is active,
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-- for example as part of an object declaration.
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if Is_Entity_Name (Subp)
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and then not In_Spec_Expression
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and then not Is_Expression_Function_Or_Completion (Current_Scope)
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and then
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(not Is_Expression_Function_Or_Completion (Entity (Subp))
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or else Scope (Entity (Subp)) = Current_Scope)
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or else Expander_Active)
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then
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if Is_Expression_Function (Entity (Subp)) then
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@ -1,3 +1,7 @@
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2019-08-19 Ed Schonberg <schonberg@adacore.com>
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* gnat.dg/expr_func9.adb: New testcase.
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2019-08-19 Bob Duff <duff@adacore.com>
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* gnat.dg/valid_scalars2.adb: New testcase.
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@ -0,0 +1,24 @@
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-- { dg-do compile }
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-- { dg-options "-gnatws" }
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procedure Expr_Func9 is
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type Root is interface;
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type Child1 is new Root with null record;
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type Child2 is new Root with record
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I2 : Integer;
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end record;
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function Create (I : Integer) return Child2 is (I2 => I);
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I : Root'Class :=
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(if False
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then Child1'(null record)
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else
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Create (1));
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begin
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null;
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end Expr_Func9;
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