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<h3 class="section">28.5 Invalidation Notices</h3>
<p><a name="index-annotations-for-invalidation-messages-2155"></a>The following annotations say that certain pieces of state may have
changed.
<a name="index-frames_002dinvalid-annotation-2156"></a>
<dl><dt><code>^Z^Zframes-invalid</code><dd>
The frames (for example, output from the <code>backtrace</code> command) may
have changed.
<p><a name="index-breakpoints_002dinvalid-annotation-2157"></a><br><dt><code>^Z^Zbreakpoints-invalid</code><dd>
The breakpoints may have changed. For example, the user just added or
deleted a breakpoint.
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