JSON parsing errors

[qwertymodo]

Issue Type: Bug

One of the recent updates has caused several valid JSON files to begin displaying parsing errors. Many of these errors make no sense, sometimes the red syntax error indicator underlines a single character in a string (in that case, I confirmed the offending character to be a standard ASCII 'r', no weird Unicode going on or anything like that, the rest of the string was apparently fine).

Perhaps related, Intellisense doesn't seem to be properly updating, because the syntax highlighter still indicates errors even when the offending lines are removed, even to the point where I removed a line, saved the file, closed VS code, reopened, and the hovertext on the syntax error referenced the text which I had removed from the file (and which no longer existed anywhere else in the file).

First noticed the issue in v1.26.0, still exists in v1.26.1

Here is a short example file:

{
    "$schema": "https://raw.githubusercontent.com/qwertymodo/msupcmplusplus/master/configs/schema#",
    "pack": "Test Pack",
    "tracks": [
        {
            "track_number": 1
        }
    ]
}

And here is what I see in VS Code when I open it:

Here's the mouseover text I get for the first "error" (the comma at the end of line 2), the others are similar.

Parse error on line 2:
.../configs/schema#",
}
----------------------^
Expecting 'STRING', got '}'
Parse error on line 2:
.../configs/schema#",
}
----------------------^
Expecting 'STRING', got '}'
Parse error on line 2:
...gs/schema#",

}
---------------------^
Expecting 'STRING', got '}'
Parse error on line 2:
...gs/schema#",

}
---------------------^
Expecting 'STRING', got '}'
Parse error on line 2:
...gs/schema#",

}
---------------------^
Expecting 'STRING', got '}'

VS Code version: Code 1.26.1 (493869e, 2018-08-16T18:38:57.434Z)
OS version: Windows_NT x64 10.0.17134

System Info

Item	Value
CPUs	Intel(R) Core(TM) i5-4670 CPU @ 3.40GHz (4 x 3392)
GPU Status	2d_canvas: enabled checker_imaging: disabled_off flash_3d: enabled flash_stage3d: enabled flash_stage3d_baseline: enabled gpu_compositing: enabled multiple_raster_threads: enabled_on native_gpu_memory_buffers: disabled_software rasterization: enabled video_decode: enabled video_encode: enabled webgl: enabled webgl2: enabled
Memory (System)	31.70GB (15.76GB free)
Process Argv	C:\Program Files\Microsoft VS Code\Code.exe
Screen Reader	no
VM	0%

Extensions (15)

Extension	Author (truncated)	Version
vscode-css-formatter	aes	1.0.1
pascal	ale	6.3.0
vagrant	bbe	0.5.0
lex-flex-yacc-bison	fau	0.0.3
nsis	idl	3.13.2
code-beautifier	mic	2.1.0
prettify-json	moh	0.0.3
cpptools	ms-	0.18.1
csharp	ms-	1.15.2
mono-debug	ms-	0.15.8
vsliveshare	ms-	0.3.577
veriloghdl	msh	0.3.3
tmlanguage	Tog	0.9.0
jinja	who	0.0.8
html-css-class-completion	Zig	1.17.1

[aeschli]

@qwertymodo Can you check if this comes from a different extension?
Expecting 'STRING', got '}' is not an error that the JSON language service emmits.

[aeschli]

Likely related to #56193

[qwertymodo]

I didn't change any extensions between when it was working and when it started failing, the only change was a VS Code update. I just tested on my other computer running v1.25.1, and the problem does not occur. I will try updating this computer to v1.26.1 and see if I can reproduce, and if so I'll try with extensions disabled and report back.

[IronGeek]

I'm not sure, but it's probably related to this issue: Togusa09/vscode-tmlanguage#14

[aeschli]

Marking as duplicate of https://github.com/Togusa09/vscode-tmlanguage

[qwertymodo]

Agreed, that looks pretty much identical to what I'm dealing with here.