Powershell "-match" Bug or Feature? O_o

"h\abc" -match "h\a"
False

"h\abc" -match "h\b"
True


"h\abc" -match "h\c"

parsing "h\c" - Missing control character.
At C:\Work\Scripts\App03.ps1:14 char:1
+ "h\abc" -match "h\c"
+ ~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : OperationStopped: (:) [], ArgumentException
    + FullyQualifiedErrorId : System.ArgumentException

"h\k" -match "h\k"
parsing "h\k" - Malformed \k<...> named back reference.
At C:\Work\Scripts\App03.ps1:16 char:1
+ "h\k" -match "h\k"
+ ~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : OperationStopped: (:) [], ArgumentException
    + FullyQualifiedErrorId : System.ArgumentException

"h\k" -match "h\a"
False



"a\a" -match "a\a"
False

"a\a" -match "a\k"
parsing "a\k" - Malformed \k<...> named back reference.

"a\a" -match "a\b"
True



$PSVersionTable.PSVersion

False

Major  Minor  Build  Revision
-----  -----  -----  --------
5      1      17763  771

IDE VisualStudia Code Version: 1.40.1 (user setup)
Commit: 8795a9889db74563ddd43eb0a897a2384129a619
Date: 2019-11-13T16:49:35.976Z
Electron: 6.1.2
Chrome: 76.0.3809.146
Node.js: 12.4.0
V8: 7.6.303.31-electron.0
OS: Windows_NT x64 10.0.17763

---

Не будите, да не будимы будите!