json2.raw_decode/1 fails to parse valid json content, that has escaped characters in it

[spytheman]

V version: V 0.4.9 4236baf, press to see full `v doctor` output

V full version	V 0.4.9 bc3fc12.4236baf
OS	linux, Ubuntu 20.04.6 LTS
Processor	4 cpus, 64bit, little endian, Intel(R) Core(TM) i3-3225 CPU @ 3.30GHz
Memory	0.52GB/15.05GB
V executable	/home/delian/code/v/v
V last modified time	2025-03-08 08:06:24
V home dir	OK, value: /home/delian/code/v
VMODULES	OK, value: /home/delian/.vmodules
VTMP	OK, value: /tmp/v_1000
Current working dir	OK, value: /home/delian/code/v
env VFLAGS	"-no-parallel"
Git version	git version 2.48.1
V git status	weekly.2025.10-38-gaf624713-dirty
.git/config present	true
cc version	cc (Ubuntu 10.5.0-1ubuntu1~20.04) 10.5.0
gcc version	gcc (Ubuntu 10.5.0-1ubuntu1~20.04) 10.5.0
clang version	clang version 10.0.0-4ubuntu1
tcc version	tcc version 0.9.28rc 2024-07-31 HEAD@1cee0908 (x86_64 Linux)
tcc git status	thirdparty-linux-amd64 0134e9b9
emcc version	N/A
glibc version	ldd (Ubuntu GLIBC 2.31-0ubuntu9.16) 2.31

What did you do?
./v -g -o vdbg cmd/v && ./vdbg x.v && x

import x.json2

content := r'{"some_name": "some_value \n [ ] { } ( ) , ; ? * = ! \\@ \\"}'
d := json2.raw_decode(content)!
dump(d)

What did you see?

================ V panic ================
   module: main
 function: main()
  message: [x.json2] missing double quotes in string closing (0:98)
     file: x.v:4
   v hash: 4236baf
=========================================
/tmp/v_1000/../../../../../../home/delian/code/v/vlib/builtin/builtin.c.v:88: at panic_debug: Backtrace
/tmp/v_1000/../../../../../../home/delian/code/v/x.v:6: by main__main

What did you expect to see?

The value of d should be printed, the json2.raw_decode/1 should not return an error for valid json content.

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[huly-for-github]

Connected to Huly®: V_0.6-22287

[spytheman]

From Discord, from @revosw :

Strange, the entire string looks like this:

"**SQLValidDSN** is called by a driver's [ConfigDSN](../../../odbc/reference/syntax/configdsn-function.md) to check the length of the data source name and the validity of the individual characters in the data source name. It checks whether the length of the name is greater than SQL_MAX_DSN_LENGTH, as defined in Sqlext.h. (The length of the data source name is also checked by [SQLWriteDSNToIni](../../../odbc/reference/syntax/sqlwritedsntoini-function.md).) **SQLValidDSN** checks whether any of the following invalid characters are included in the data source name:  \n  \n [ ] { } ( ) , ; ? * = ! \\@ \\"

[spytheman]

Note: jq has no problems parsing that content:

It also passes validation with https://jsonlint.com/ .

[changrui]

Module json is running well and decode to a struct or map[string]string correctly.

[spytheman]

Yes, the issue is specific to the x.json2 decoder.