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UBT can parse content that exceeds the length of the file

Define a marco at the end of a header file: alt text

Open UnrealHeaderTool project, In the function "FBaseParser::GetChar", add a breakpoint with condition "InputPos>InputLen+1".Then start debugging UnrealHeaderTool with arguments copyed from the game project. Wait until the breadpoint is triggered: alt text

At this moment, UBT starts to parse the part of "FBaseParser::Input" which is not belonged to the header file.Then any unexpected compilation error maybe happened in other header files!!!

This bug took me a whole day to find...

Please to fix it as soon as possible :)

Product Version: UE 4.17
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asked Sep 15 '17 at 12:40 PM in Bug Reports

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avatar image Tim C ♦♦ STAFF Sep 20 '17 at 08:20 PM

Hi superman_tb,

When I added a macro to the end of a header file as you showed, the last \ character seemed to consume the end of file character. However, that only happened if I did not add some extra blank lines between the macro and the end of the file. If you do not include the last \ character, do you still run into this issue?

I was not able to get the conditional breakpoint that you mentioned setting to get hit. Could you clarify what arguments you are using when you start debugging UHT?


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Hi, Tim. alt text

I deleted the last '\' character, and this issue was solved.

The arguments of UHT were as below:

alt text

Thank you very much.

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answered Sep 22 '17 at 12:07 PM

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