https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126242

Roger Sayle <roger at nextmovesoftware dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
     Ever confirmed|0                           |1
           Assignee|unassigned at gcc dot gnu.org      |roger at 
nextmovesoftware dot com
   Last reconfirmed|                            |2026-07-13

--- Comment #1 from Roger Sayle <roger at nextmovesoftware dot com> ---
Created attachment 65035
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=65035&action=edit
proposed patch

I'm bootstrapping and regression testing the attached patch.  The problem is
that the value range may be uninitialized at the point lower_bound is called. 
The proposed solution is to both always attempt to initialize the range, and to
check that the range is not undefined before using it.

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