Why vaadin-sass-compiler does not Warn about math errors and undefined vari

Example:

[class*="textfield"] { padding-right: $v-unit-size * 1.2; / 0 } Result is disheartening:

.bill .v-datefield-test [class*="textfield"] { padding-right: ∞px; } And if I use not defined anywhere variable, it just skipped and inserted to result CSS as defined:

.bill .v-datefield [class*="textfield"] { padding-right: $v-unit-size-old; } Why vaadin-sass-compiler does not Warn about math errors and undefined variables?