This is a weird one and hopefully I've properly distilled the MWE. Here's what I think is happening:
If you have a parenthesized crescendo with a spanner style of none, when the line breaks, it creates two small parentheses under the new line and throws two programming errors. Here's the MWE: \version "2.25.13" music = \relative { c''4 c c c | \break c4 c c c | } dynamics = { \override DynamicTextSpanner.style = #'none s2. s4\parenthesize\cresc | s4 s2.\! | } << \new Staff \music \new Dynamics \dynamics >> The output looks like this: Processing `/home/knute/Documents/LilyPond/ChopinFF/Op34/test-for-errors.ly' Parsing... Interpreting music... Preprocessing graphical objects... Finding the ideal number of pages... Fitting music on 1 page... Drawing systems... programming error: Improbable offset for stencil: inf staff space Setting to zero. continuing, cross fingers programming error: Improbable offset for stencil: -inf staff space Setting to zero. continuing, cross fingers Converting to `test-for-errors.pdf'... Success: compilation successfully complete -- Knute Snortum