handle case where jobs are manually removed from the tasks screen

docs/changelog.txt

@@ -57,6 +57,7 @@ Template for new versions:
 - `sort`: search and sort for the "choose unit to elevate to the barony" screen. units are sorted by the number of item preferences they have and the units are annotated with the items that they have preferences for
 
 ## Fixes
+- `sort`: fix potential crash when removing jobs directly from the Tasks info screen
 
 ## Misc Improvements
 - wherever units are listed in DFHack tools, properties like "agitated" or (-trained-) are now shown

plugins/lua/sort/info.lua

@@ -436,20 +436,48 @@ function InfoOverlay:updateFrames()
     return true
 end
 
+function InfoOverlay:do_refresh()
+    self.refresh_search = nil
+    if self:get_key() == 'JOBS' then
+        local data = self.state.JOBS
+        -- if any jobs have been canceled, fix up our data vectors
+        if data and data.saved_visible and data.saved_original then
+            local to_remove = {}
+            for _,elem in ipairs(data.saved_visible) do
+                if not utils.linear_index(tasks.cri_job, elem) then
+                    table.insert(to_remove, elem)
+                end
+            end
+            for _,elem in ipairs(to_remove) do
+                table.remove(data.saved_visible, utils.linear_index(data.saved_visible, elem))
+                data.saved_visible_size = data.saved_visible_size - 1
+                table.remove(data.saved_original, utils.linear_index(data.saved_original, elem))
+                data.saved_original_size = data.saved_original_size - 1
+            end
+        end
+    end
+    self:do_search(self.subviews.search.text, true)
+end
+
 function InfoOverlay:onRenderBody(dc)
+    if self.refresh_search then
+        self:do_refresh()
+    end
     InfoOverlay.super.onRenderBody(self, dc)
     if self:updateFrames() then
         self:updateLayout()
     end
-    if self.refresh_search then
-        self.refresh_search = nil
-        self:do_search(self.subviews.search.text)
-    end
 end
 
 function InfoOverlay:onInput(keys)
-    if keys._MOUSE_L and self:get_key() == 'WORK_DETAILS' then
-        self.refresh_search = true
+    if self.refresh_search then
+        self:do_refresh()
+    end
+    if keys._MOUSE_L then
+        local key = self:get_key()
+        if key == 'WORK_DETAILS' or key == 'JOBS' then
+            self.refresh_search = true
+        end
     end
     return InfoOverlay.super.onInput(self, keys)
 end