[BUG] Coercing version with prerelease identifier that starts with digits returns truncated identifier

[nhedger]

Is there an existing issue for this?

• I have searched the existing issues

Current Behavior

Using semver 7.7.1 (and possibly earlier versions), attempting to coerce a version string that contains a prerelease identifier that starts with digits, will result in that identifier to be truncated after the digits.

Here are some example:

• 1.0.0-alpha.1ab produces 1.0.0-alpha.1
• 1.0.0-alpha.12ab produces 1.0.0-alpha.12
• 1.0.0-alpha.1234.23cd produces 1.0.0-alpha.1234.23

This is problematic when the identifier is a hash that may start with a digit.

The issue doesn't seem to happen if the identifier is composed of only number, or if the identifier starts with an alphabetic character:

• 1.9.5-nightly.abc123 is coerced as expected
• 1.9.5-nightly.abcdef is coerced as expected
• 1.9.5-nightly.123456 is coerced as expected

Expected Behavior

The prerelease identifier isn't truncated.

Steps To Reproduce

1. Clone the reproduction repository: https://github.com/nhedger/semver-prerelease-issue
2. Install the dependencies
3. Run node index.mjs
4. See that the prerelease identifier is truncated

Environment

• npm: 10.8.2
• Node: 20.17.0
• OS: macOS
• platform: MacBook Pro M1