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The most important part of the header is the *info pointer*, which points to the info table for the closure. In the default build, this is all the header contains, so a header is normally just one word. In other builds, the header may contain extra information: eg. in a profilnig build it also contains information about who built the closure.
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The most important part of the header is the *info pointer*, which points to the info table for the closure. In the default build, this is all the header contains, so a header is normally just one word. In other builds, the header may contain extra information: eg. in a profiling build it also contains information about who built the closure.
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