How can I coax LilyPond into giving me more information about Guile errors?
Attempt 1:
```
$ out/bin/lilypond -ddebug-eval
~/lilypond-src/input/regression/context-property-deprecated-scheme-get.ly
GNU LilyPond 2.25.21 (running Guile 3.0)
Processing
`/home/user/lilypond-src/input/regression/context-property-deprecated-scheme-get.ly'
Parsing...
/home/user/lilypond-src/input/regression/context-property-deprecated-scheme-get.ly:24:2:
fatal error: Guile signaled an error for the expression beginning here
#
(define-deprecated-property-NO-GOOD
```
Attempt 2:
```
$ out/bin/lilypond -e "(debug-enable 'backtrace)"
~/lilypond-src/input/regression/context-property-deprecated-scheme-get.ly
GNU LilyPond 2.25.21 (running Guile 3.0)
Processing
`/home/user/lilypond-src/input/regression/context-property-deprecated-scheme-get.ly'
Parsing...
/home/user/lilypond-src/input/regression/context-property-deprecated-scheme-get.ly:24:2:
fatal error: Guile signaled an error for the expression beginning here
#
(define-deprecated-property-NO-GOOD
```
For this example, I would expect (roughly) "that symbol isn't bound",
but my true need is to gather information about a failure that I have
not been able to reproduce outside the CI environment.
Thanks.
--
Dan
