denoland/deno · error

Invalid version req '{req_str}': {e}

Error message

Invalid version req '{req_str}': {e}

What it means

Error "Invalid version req '{req_str}': {e}" thrown in denoland/deno.

Source

Thrown at cli/tools/installer/npm_compat.rs:1468

  match req_version {
    None => metadata
      .get("dist-tags")
      .and_then(|dt| dt.get("latest"))
      .and_then(|v| v.as_str())
      .map(|s| s.to_string())
      .ok_or_else(|| anyhow!("No latest version for {registry_name}")),
    Some(req_str) => {
      if let Ok(exact) = Version::parse_standard(req_str)
        && metadata
          .get("versions")
          .and_then(|vs| vs.get(exact.to_string()))
          .is_some()
      {
        return Ok(exact.to_string());
      }

      let version_req = VersionReq::parse_from_npm(req_str)
        .map_err(|e| anyhow!("Invalid version req '{req_str}': {e}"))?;

      let versions = metadata
        .get("versions")
        .and_then(|vs| vs.as_object())
        .ok_or_else(|| anyhow!("No versions for {registry_name}"))?;

      let mut best: Option<Version> = None;
      for key in versions.keys() {
        if let Ok(v) = Version::parse_standard(key)
          && version_req.matches(&v)
          && best.as_ref().is_none_or(|b| v > *b)
        {
          best = Some(v);
        }
      }

      best.map(|v| v.to_string()).ok_or_else(|| {
        anyhow!("No version matching '{req_str}' for {registry_name}")

View on GitHub (pinned to 89f33cbef2)

When it happens

Trigger: Thrown at cli/tools/installer/npm_compat.rs:1468 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of denoland/deno@89f33cbef2 (2026-08-16). Data as JSON: /api/errors/1b948c471d3d4c05. Report an issue: GitHub.