This PR addresses an edge case where the `Locale.LanguageRange(String, double)` constructor accepts `Double.NaN` as a weight. A `LanguageRange` weight is specified by https://datatracker.ietf.org/doc/html/rfc2616#section-3.9 and must be between 0.0 and 1.0, inclusive. The existing bounds checks do not handle this case. This change adds an explicit `Double.isNaN(weight)` check.
The issue does not affect parsed range strings in the same way, since the input is normalized to lower case before parsing and `"nan"` is not accepted by `Double.parseDouble`. However, I added a test for that case as well, since one did not previously exist. --------- - [x] I confirm that I make this contribution in accordance with the [OpenJDK Interim AI Policy](https://openjdk.org/legal/ai). ------------- Commit messages: - init Changes: https://git.openjdk.org/jdk/pull/31697/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=31697&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8387261 Stats: 4 lines in 2 files changed: 2 ins; 0 del; 2 mod Patch: https://git.openjdk.org/jdk/pull/31697.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/31697/head:pull/31697 PR: https://git.openjdk.org/jdk/pull/31697
