Fix ASAN related crashes in SAP formats
Revert "Fix ASAN crash (needs another look)"

This reverts commit 4235e0503077def7abb350dd05f7d92ed75b2e49.
Fix ASAN crash (without any performance loss)
Revert "Fix ASAN related crashes in SAP formats"

(resulted in loss of performance)

This reverts commit 92f569341afe9bcdd8c22803115bd8b51c447730.
Document known ASAN related crashes
Fix mistakes made in commit 23dc44df

(reverting the whole earlier commit was more work)
Revert "Fix ASAN crash in ipb2 format" due to speed loss

This reverts commit 4e4fe45e9eebf55002db05a348af6e578584f711.
Document known ASAN related crash in ipb2 format
Fix ASAN related crash in nk format
Revert "Fix ASAN crash in dmd5 format" (better fix coming)

This reverts commit a68aa7981c0601d4040606d66be3c41ab15108f7.
Fix ASAN crash in dmd5 format