https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118782

            Bug ID: 118782
           Summary: Internal compiler error with -gnatyc
           Product: gcc
           Version: 15.0
            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 60410
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=60410&action=edit
Demonstrator

Running on macOS Sequoia 15.3 with Command Line Tools 16.2.

In the attached demo,

$ gnatmake -c -u -f  -gnatyc cvars.adb frequently results in

gcc -c -gnatyc cvars.adb
+===========================GNAT BUG DETECTED==============================+
| 15.0.1 20250126 (experimental) (x86_64-apple-darwin23) Constraint_Error
erroneous memory access|
| Error detected at cvars.adb:9:5                                          |
| Compiling cvars.adb                                                      |
| 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).

cvars.adb

cvars.adb:1:04: (style) space required [-gnatyt]
compilation abandoned
gnatmake: "cvars.adb" compilation error

Same with gcc 14.2.0/aarch64-apple-darwin23.

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