Language-specific 'files.encoding' setting not applied when opening a file 'directly'

[haudan]

Issue Type: Bug

Example settings

"[c]": {
    "editor.tabSize": 2,
    "files.encoding": "windows1252",
},

Problem

✅ When launching vscode and then opening a .c file with the File -> Open File dialogue, the files.encoding setting is correctly applied to the opened buffer.

❌ When double clicking on a .c file (assuming .c files are associated with vscode), or opening a .c file via the context menu (Open with Code), or when invoking vscode on the command line with a filename as it's only argument, the files.encoding setting is not applied to the buffer.

editor.tabSize on the other hand, is always correctly applied.

---

This problem is not specific to the file type / programming language / language extension. I use C just as an example here.

VS Code version: Code 1.21.0 (9a199d7, 2018-03-07T11:04:09.886Z)
OS version: Windows_NT ia32 10.0.15063

System Info

Item	Value
CPUs	Intel(R) Core(TM) i7-6600U CPU @ 2.60GHz (4 x 2808)
Memory (System)	7.87GB (4.41GB free)
Process Argv	C:\Program Files (x86)\Microsoft VS Code\Code.exe
Screen Reader	no
VM	0%

Extensions (12)

Extension	Author (truncated)	Version
language-x86-64-assembly	13x	2.2.11
Bookmarks	ale	0.18.2
theme-verdandi	be5	1.7.3
better-toml	bun	0.3.2
baan	dan	0.0.1
vsc-material-theme	Equ	1.5.1
macros	ged	1.2.1
vscode-icons	rob	7.21.0
rust	rus	0.4.0
vscode-hexdump	sle	1.6.0
vscode-todo-highlight	way	0.5.11
better-align	wwm	1.1.6

(10 theme extensions excluded)

Reproduces without extensions

[haudan]

This is possibly a duplicate of #39084. Maybe my error description helps, so I'll leave the issue open.

[vscodebot]

Thanks for creating this issue! We figured it's covering the same as another one we already have. Thus, we closed this one as a duplicate. You can search for existing issues here. See also our issue reporting guidelines.

Happy Coding!