RFR: 8251329: (zipfs) Files.walkFileTree walks infinitely if zip has dir named "." inside [v6]

[Lance Andersen]

> Hi,
> 
> As discussed in the https://mail.openjdk.java.net/pipermail/core-libs-dev/2021-July/079621.html thread, this is the revised patch to address the use of '.' and '..' within Zip FS
> 
> Zip FS needs to use "." and ".." as links to the current and parent directories and cannot reliably support entries that have "." and ".." as name elements.  This patch updates Zip Fs  to reject ZIP files that have entries in the CEN that can't be used for files in a file system.
> 
> 
> Mach5 tiers 1 through 3 have been run without any errors encountered .
> 
> Best,
> Lance

Lance Andersen has updated the pull request incrementally with one additional commit since the last revision:

  Add missing space in if statement

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/4900/files
  - new: https://git.openjdk.java.net/jdk/pull/4900/files/0bf065ea..292e698f

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=4900&range=05
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=4900&range=04-05

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/4900.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/4900/head:pull/4900

PR: https://git.openjdk.java.net/jdk/pull/4900