Crash when parse big jsonfile

[oskycar]

• What is the issue you have?
  I had gened a 5.8M json file. when I parse it use nlohmann/json, it crashed!.

• Please describe the steps to reproduce the issue. Can you provide a small but working code example?

nlohmann::json jobj = nlohmann::json::parse(file);

• Which compiler and operating system are you using? Is it a supported compiler?
  MacOS 10.15.3, Use Xcode 11.3.1

• Did you use a released version of the library or the version from the develop branch?
  use released version 3.6.1, I also tried latesed version 3.7.3, it crashed too.

• If you experience a compilation error: can you compile and run the unit tests?

the output error message:
libc++abi.dylib: terminating with uncaught exception of type nlohmann::detail::parse_error: [json.exception.parse_error.101] parse error at line 1, column 1: syntax error while parsing value - invalid literal; last read: '/'

I had upload the json file url: https://www.dropbox.com/s/5wsfcd6p06jeckk/out.json?dl=0

[nlohmann]

Are you sure it is exactly that file? The parser error states that there was a / read. Can you make sure the file is read from the beginning?

[oskycar]

Are you sure it is exactly that file? The parser error states that there was a / read. Can you make sure the file is read from the beginning?

o...，maybe I made a mistake, I passed the file path to it, like this:
nlohmann::json jobj = nlohmann::json::parse("/tmp/a.json");

when I follow the example code, It works very well.
std::ifstream i("/Users/allenyang/Desktop/out.json"); nlohmann::json j; i >> j;

so It can only pass the file content to it ?

[ArtemSarmini]

This function expects a string to parse, not a path to some file.

[nlohmann]

You can pass an std::ifstream to the parse function to read from a file. If you pass a string, it is interpreted as JSON text, not as a filename.

[nlohmann]

@oskycar Do you need further assistance?

[oskycar]

@oskycar Do you need further assistance?

thank you very much. I had no more questions.

[oskycar]

@oskycar Do you need further assistance?

we can close this issue. Thanks for your attention.