alternate spanner-id-aware spanner does not work in 2.39.48

[Rutger Hofman]

Hello list,

to my grief I noticed that David Nalesnik's id-aware spanner 
implementation in scheme no longer works in 2.39.48. It gives me errors 
like "warning: No spanner to end!!" and "warning: incomplete spanner 
removed!" if there are overlapping spanners. No

For reference, I again attach David N's (most recent) textspanner 
implementation. The \score block is a minimal example.

Note: this worked fine with 2.19.39, and fails with 2.19.48. I didn't 
look at intermediate versions.

Rutger

text-spanner-id-corrected.ly
Description: Text Data