anchor.diff:  +
   3. and, finally, print the stack trace:
   +
  -[source,bash]
  +[source]
   ----
   (gdb) bt
   #0  __futex_abstimed_wait_common64 (private=0, cancel=true, abstime=0x0, op=393, expected=0, futex_word=0x2cd7adc) at futex-internal.c:57
  
positive.code: To fix this we can either rerun `gdb` from the target directory or,
  run `directory target/debugging-native-1.0.0-SNAPSHOT-native-image-source-jar/sources` e.g.:
  
  [source,bash]
  ----
  (gdb) directory target/debugging-native-1.0.0-SNAPSHOT-native-image-source-jar/sources
  Source directories searched: /data/target/debugging-native-1.0.0-SNAPSHOT-native-image-source-jar/sources:$cdir:$cwd
  
negative.code: 
  Then start the application in `gdb` and execute `run`.
  
  [source]
  ----
  gdb ./target/debugging-native-1.0.0-SNAPSHOT-runner
  ...
  