Following advice from Michael Ansley, I broke up the patch in

Bruce Momjian <bruce@momjian.us>

Commit: 7d7fb02148fb6733fad23e31acd79cd0a26e3372
Author: Bruce Momjian <bruce@momjian.us>
Date: 1999-09-27T19:40:40Z
Releases: 7.1.1
Following advice from Michael Ansley, I broke up the patch in
two: one fixes uminus and other literal length. They are to be
applied - uminus first, then possilbly literal on top of uminus.

Leon

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src/backend/parser/scan.l modified +10 −97