PROBLEM TO BE SOLVED: To manufacture software which is high in quality without using any static analysis tool.SOLUTION: In an online build system 1 including a user terminal 2 and a build server 4 which receives a source code from the user terminal 2, and executes preprocessing, the build server 4 includes: a storage part for storing building suppression information in which the pattern of a predetermined code is associated with a code description to give an opportunity to find out the possibility of a bug in the source code or to cope with the bug; and a preprocessing execution part for searching the source code by referring to the building suppression information, and for, when finding out the pattern, executing preprocessing of adding the code description to the source code.
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