[Github-comments] [geany/geany] Track changes to navqueue positions as a document is edited (#1480)

[Vasiliy Faronov]

(moved out of #1136)

1. Open a C source file with the following text:

   ```
   void foo(void)
   {
       printf("Hello world!\n");
   }
   
   void main()
   {
       foo();
   }
   ```

2. On line 8, Ctrl+click on `foo`. Geany navigates to line 1, the definition of `foo`.

3. Insert the following text at the beginning of the document:

   ```
   #include <stdio.h>
   
   ```

4. Invoke “Navigate back a location” (with the toolbar button or the keybinding).

Expected result: Geany navigates to line 10, which now contains the call to `foo` from which we jumped to the definition of `foo`.

Actual result: Geany navigates to line 8, because positions in the navqueue were not updated when extra text was inserted at the beginning of the document.

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