[BUG] `intersects(r1, r2, options)` function returns `true` if the not intersected range `< 0.0.0` and `0.x` are supplied

[sounisi5011]

Is there an existing issue for this?

• I have searched the existing issues

Current Behavior

Range < 0.0.0 (or range < 0.0.0-0 if the includePrerelease option is true) should not intersect with all ranges. However, the intersects(r1, r2, options) function returns true when comparing ranges < 0.0.0 (< 0.0.0-0) and X-Range.

Expected Behavior

• Returns false if compared to range < 0.0.0 if the includePrerelease option is false
• Returns false if compared to range < 0.0.0-0 if the includePrerelease option is true

Steps To Reproduce

const semver = require('semver'); // Import semver@7.3.8

// This returns `false`, which is as expected since the two ranges do not intersect
semver.intersects('< 1.0.0', '1.0.0', { includePrerelease: false }) === false

// These also return `false`
semver.intersects('< 1.0.0', '1.x', { includePrerelease: false }) === false
semver.intersects('< 0.0.0', '1.x', { includePrerelease: false }) === false
semver.intersects('< 0.0.0', '0.1.x', { includePrerelease: false }) === false
semver.intersects('< 0.0.0', '0.0.0', { includePrerelease: false }) === false

// These return `true` because they intersect if a pre-release is included
semver.intersects('< 1.0.0', '1.x', { includePrerelease: true }) === true
semver.intersects('< 0.0.0', '0.x', { includePrerelease: true }) === true

// However, when compared to the X-Range, this returns `true` instead of `false`
semver.intersects('< 0.0.0', '0.0.x', { includePrerelease: false }) !== false
semver.intersects('< 0.0.0', '0.x', { includePrerelease: false }) !== false
semver.intersects('< 0.0.0', '0', { includePrerelease: false }) !== false
semver.intersects('< 0.0.0-0', '0.0.x', { includePrerelease: true }) !== false
semver.intersects('< 0.0.0-0', '0.x', { includePrerelease: true }) !== false
semver.intersects('< 0.0.0-0', '0', { includePrerelease: true }) !== false

// Whether the range `< 0.0.0` is an X-range or not does not affect the result
semver.intersects('< 0', '0.0.0', { includePrerelease: false }) === false
semver.intersects('< 0.x', '0.0.0', { includePrerelease: false }) === false
semver.intersects('< 0.0.x', '0.0.0', { includePrerelease: false }) === false
semver.intersects('< 0', '0.0.x', { includePrerelease: false }) !== false
semver.intersects('< 0.x', '0.0.x', { includePrerelease: false }) !== false
semver.intersects('< 0.0.x', '0.0.x', { includePrerelease: false }) !== false

Environment

• semver: 7.3.8

[isaacs]

Technically this should be true if including pre releases, because 0.0.0-0 is less than 0.0.0.

[sounisi5011]

Technically this should be true if including pre releases, because 0.0.0-0 is less than 0.0.0.
#521 (comment)

If the includePrerelease option is true, then yes. But this behavior does not change whether the includePrerelease option is true or false.

I forgot the includePrerelease option existed, so I will add it to the steps to reproduce. Thank you!

[isaacs]

Yeah, that definitely seems like a bug to me. Was just noting the edge case so we don't make a new bug when fixing this one 😬

[wraithgar]

With includePrerelease can anything be less than 0.0.0-0?

[jakebailey]

I would assume not; "the rules" say that in prerelease parts, any valid number comes before any valid string, and 0 is the smallest number (negative numbers don't exist 🙈).

[wraithgar]

Thanks for confirming, that was my understanding also.

[wraithgar]

If includePrerelease is true and either range is <0.0.0-0 we always return false
If includePrerelease is false and either range starts with <0.0.0 we always return false

I think that covers everything?

[wraithgar]

Found another bug while testing a fix for this:

semver.intersects('< 0.0.0', '<0.1.x', { includePrerelease: true })

ends up calling

https://github.com/npm/node-semver/blob/main/ranges/intersects.js#L5

which doesn't pass those options to the intersects method itself

[ljharb]

nice catch