$ ./mongo
> <ctl-s>
hit down arrow
(i-search)`': Sun Jun 10 14:54:24 mongo got signal 11 (Segmentation fault: 11), stack trace

Null pointer dereferences
A null pointer dereference will occur.
Dereference of an explicit null value

Defect 10069 (STATIC_C)
  Checker FORWARD_NULL (subcategory deref_constant_null)
  File /src/mongo/shell/linenoise.cpp
  Function InputBuffer::incrementalHistorySearch(PromptBase &, int)
    /src/mongo/shell/linenoise.cpp, line: 1640
    Assigning: "activeHistoryLine" = "NULL".
        UChar32* activeHistoryLine = 0;