Using std::map in functions the second time crashes

[Jay]

I am having a very large problem.

I have a map which is identified with "std::map<string,string (*)(string,vector<string>)>".
The map contains a name of the function that maps to the actual function.
I have to make several calls to this map. The map is in global scope.

One of my functions contains an std::map<string,string>. The map executes correctly if ran the first time, however, the second time it executes a function it errors out: "Uncaught TypeError: Cannot read property 'a0' of undefined" . I manage to find the cause of the problem and it seems to be including any type of std::map in a function. If I remove the std::map it executes fully and correctly. If I add it to any other function that is also has a pointer from "std::map<string,string (*)(string,vector<string>)>". it gives me an error on second execution. So for now, I am using vectors which seem to work. However, I would really love to use std::map<string,string> for several of my functions. Again, it executes once, but fails to execute second time. Perhaps this is due to Cheerp Preprocesser optimizing the std::map that executes first time and then after it completes the execution, the second time, it somehow tries to overwrite that object?

I am not sure, but it would be great if it gets fixed.

[Alessandro Pignotti (a-pignotti)]

Hello Jay, could you attach your test case? It would be very helpful.

[Jay (jayjay2016)]

I've attached the test case. The code attached works correctly in C++ (with modification of main and web). The code also compiles without any errors. However, when I run in the browser, I get the following error:
juliar.js:1 Uncaught ReferenceError: da is not defined(…)

This seem to happen at compilation step. Because if I compile it, sometimes it gives this type of error. However, at times when I compile with same script and same exact file no errors are generated.

(This seems to be a Cheerp error because it appears depending whether the C++ file gets compiled correctly or not. Please advise)

The original code used for this test case can be found at: https://github.com/juliarLang/juliar/tree/master/binaries/WebsiteAlpha

Thanks,
Jay

[Alessandro Pignotti (a-pignotti)]

Hello,

I am not sure that I properly reproduced your bug. From my preliminary analysis it would seem that the only problem is that Juliar_core::hide is not defined. I would suggest that you use the -cheerp-pretty-code command line option to generate more readable and debuggable code.

[Jay (jayjay2016)]

I have compiled with pretty-code and included relevant source.
(Open zip and go to binaries/WebsiteAlpha to see the juliar.js)

In a file src/core_module/math.cpp all I did was added was some std::map variable.

Please keep in mind, using vectors works perfectly!

If I remove the std::map it works perfectly no javascript errors are given and file executes to the finish. However, if I add an std::map to any of functions in namespace it freaks out. g++/clang++ compilation works well (no errors are given) However, when I compile a cheerp, it gives me such error in javascript.

Please advice.

[Alessandro Pignotti (a-pignotti)]

I suggest that you try again with out nightly builds if possible:

https://launchpad.net/~leaningtech-dev/+archive/ubuntu/cheerp-nightly-ppa/+packages

The problem seems not to happen with current master