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Type:
Bug
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Resolution: Duplicate
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Priority:
Major - P3
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None
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Affects Version/s: None
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Component/s: None
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Storage Execution
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ALL
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Storage Execution 2025-09-29
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Bad bit shift operation
The operation may have an undefined behavior or yield an unexpected result. A bit shift operation has a shift amount which is too large or has a negative value.
/data/mci/9292c3def3822c0dfd66af88847bcc64/bazel_cache/004acac643584f695e6309f72694e5ad/execroot/_main/src/mongo/db/storage/key_string.cpp:946: BAD_SHIFT 146093 Function call "mongo::countLeadingZeros64(integerPart << 1)" may return 64.
/data/mci/9292c3def3822c0dfd66af88847bcc64/bazel_cache/004acac643584f695e6309f72694e5ad/execroot/_main/src/mongo/db/storage/key_string.cpp:946: BAD_SHIFT 146093 Assigning: "fractionalBytes" = "mongo::countLeadingZeros64(integerPart << 1) / 8". The value of "fractionalBytes" is now 8.
/data/mci/9292c3def3822c0dfd66af88847bcc64/bazel_cache/004acac643584f695e6309f72694e5ad/execroot/_main/src/mongo/db/storage/key_string.cpp:960: BAD_SHIFT 146093 In expression "integerPart + 1UL << fractionalBytes * 8UL", left shifting by more than 63 bits has undefined behavior. The shift amount, "fractionalBytes * 8UL", is 64.
- duplicates
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- Closed
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