https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108801
Bug ID: 108801
Summary: ICE, task’s secondary_stack_size from parent
discriminant
Product: gcc
Version: 12.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ada
Assignee: unassigned at gcc dot gnu.org
Reporter: simon at pushface dot org
CC: dkm at gcc dot gnu.org
Target Milestone: ---
Created attachment 54464
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=54464&action=edit
Reproducer
An instance of a task type is declared in a record with a discriminant
Secondary_Storage_Size. The task’s Secondary_Storage_Size is specified using
the record’s corresponding discriminant, like so:
package Demo is
type Event_Queue_Base (Secondary_Stack_Size : Natural)
is tagged limited private;
private
task type Dispatcher (The_Queue : access Event_Queue_Base'Class;
Secondary_Stack_Size : Natural)
with Secondary_Stack_Size => Secondary_Stack_Size;
type Event_Queue_Base (Secondary_Stack_Size : Natural)
is tagged limited record
The_Dispatcher : Dispatcher
(Event_Queue_Base'Access,
Secondary_Stack_Size => Secondary_Stack_Size);
end record;
end Demo;
All is fine in a normal compilation, but under the Ravenscar profile (or,
indeed, just pragma Restrictions (No_Implicit_Heap_Allocations)) this happens:
$ gnatmake -c -u -f demo.ads
gcc -c demo.ads
+===========================GNAT BUG DETECTED==============================+
| 12.2.0 (x86_64-apple-darwin15) Constraint_Error erroneous memory access |
| Error detected at demo.ads:14:9 |
| Compiling demo.ads |
| Please submit a bug report; see https://gcc.gnu.org/bugs/ . |
| Use a subject line meaningful to you and us to track the bug. |
| Include the entire contents of this bug box in the report. |
| Include the exact command that you entered. |
| Also include sources listed below. |
+==========================================================================+
Please include these source files with error report
Note that list may not be accurate in some cases,
so please double check that the problem can still
be reproduced with the set of files listed.
Consider also -gnatd.n switch (see debug.adb).
demo.ads
compilation abandoned
gnatmake: "demo.ads" compilation error
This also happens with 10.1, 11.2, but not with 9.1.
