Version 2.459
- Repair the broken detection of wrongly-sized package files.
- Fix setup keeping open handles to every tarball it installs during a run.
- Fix a miscellany of error-reporting deficiencies.
- Close stdin, to protect against rogue postinstall scripts attempting to wait for user input.
http://www.cygwin.com/setup-snapshots/setup-2.459.exe
Also, this release appears in my testing to fix the hang when a new install-everything setup is attempted, as side-effect of other bugfixes.
Please test - if no regressions are discovered in the next few days, it will be promoted to the release version, accessible from the cygwin.com main page.
Max.