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[feaLib] Raise an error for rsub with NULL target - #3979

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khaledhosny merged 1 commit into
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issue-2952
Nov 4, 2025
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[feaLib] Raise an error for rsub with NULL target#3979
khaledhosny merged 1 commit into
mainfrom
issue-2952

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Glyph deletion can’t be supported with reverse chaining substitution and we were silently converting it to chaining substitution.

See discussion in #2952.

Glyph deletion can’t be supported with reverse chaining substitution and
we were silently converting it to chaining substitution.

See discussion in #2952.

Fixes #2952
@khaledhosny
khaledhosny merged commit 8e5c52d into main Nov 4, 2025
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@khaledhosny
khaledhosny deleted the issue-2952 branch November 4, 2025 18:28
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feaLib: rsub with NULL target produces wrong lookup type?

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