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Problem: semver specifies that digit sequences in a prerelease string should be compared as numbers, not lexically: https://semver.org/#spec-item-11 > Precedence for two pre-release versions with the same major, minor, > and patch version MUST be determined by comparing each dot separated > identifier from left to right until a difference is found as follows: > 1. Identifiers consisting of only digits are compared numerically. > 2. Identifiers with letters or hyphens are compared lexically in ASCII sort order. > 3. Numeric identifiers always have lower precedence than non-numeric identifiers. > 4. A larger set of pre-release fields has a higher precedence than a smaller set, if all of the preceding identifiers are equal. Example: 1.0.0-alpha < 1.0.0-alpha.1 < 1.0.0-alpha.beta < 1.0.0-beta < 1.0.0-beta.2 < 1.0.0-beta.11 < 1.0.0-rc.1 < 1.0.0. Solution: cmp_prerel() treats all digit sequences in a prerelease string as numbers. This doesn't _exactly_ match the spec, which specifies that only dot-delimited digit sequences should be treated as numbers...