Fix issue with adhoc expiration when no backups in a repository.

If there are no backups in one or more repositories then the following error occurs during adhoc expiration:

ASSERT: [025]: cannot get index 0 from list with 0 value(s)

Fix this by skipping the adhoc logic when there are no backups in a repository.

doc/xml/release/2025/2.56.0.xml

@@ -1,5 +1,20 @@
 <release date="XXXX-XX-XX" version="2.56.0dev" title="UNDER DEVELOPMENT">
     <release-core-list>
+        <release-bug-list>
+            <release-item>
+                <github-issue id="2645"/>
+                <github-pull-request id="2646"/>
+
+                <release-item-contributor-list>
+                    <release-item-ideator id="anup.gupta"/>
+                    <release-item-contributor id="david.steele"/>
+                    <release-item-reviewer id="stefan.fercot"/>
+                </release-item-contributor-list>
+
+                <p>Fix issue with adhoc expiration when no backups in a repository.</p>
+            </release-item>
+        </release-bug-list>
+
         <release-improvement-list>
             <release-item>
                 <github-pull-request id="2642"/>

doc/xml/release/contributor.xml

@@ -115,6 +115,11 @@
     <contributor-id type="github">woblerr</contributor-id>
 </contributor>
 
+<contributor id="anup.gupta">
+    <contributor-name-display>Anup Gupta</contributor-name-display>
+    <contributor-id type="github">anupg19</contributor-id>
+</contributor>
+
 <contributor id="argdenis">
     <contributor-name-display>argdenis</contributor-name-display>
     <contributor-id type="github">argdenis</contributor-id>

src/command/expire/expire.c

@@ -829,7 +829,7 @@ removeExpiredBackup(const InfoBackup *const infoBackup, const String *const adho
         unsigned int backupIdx = 0;
 
         // Only remove the resumable backup if there is a possibility it is a dependent of the adhoc label being expired
-        if (adhocBackupLabel != NULL)
+        if (adhocBackupLabel != NULL && !strLstEmpty(backupList))
         {
             const String *const manifestFileName = strNewFmt(
                 STORAGE_REPO_BACKUP "/%s/" BACKUP_MANIFEST_FILE, strZ(strLstGet(backupList, backupIdx)));

test/src/module/command/expireTest.c

@@ -447,6 +447,11 @@ testRun(void)
             "20181118-152100F_20181119-152152D.save\n"
             BOGUS_STR "/\n"
             "backup.info\n");
+
+        // -------------------------------------------------------------------------------------------------------------------------
+        TEST_TITLE("skip adhoc when no backups");
+
+        TEST_RESULT_VOID(removeExpiredBackup(infoBackup, STRDEF("20181118-152100F"), 0), "expire");
     }
 
     // *****************************************************************************************************************************