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-rw-r--r--indra/llwindow/llwindowwin32.cpp3
1 files changed, 2 insertions, 1 deletions
diff --git a/indra/llwindow/llwindowwin32.cpp b/indra/llwindow/llwindowwin32.cpp
index f303d1bb21..a32346bfd3 100644
--- a/indra/llwindow/llwindowwin32.cpp
+++ b/indra/llwindow/llwindowwin32.cpp
@@ -4262,7 +4262,8 @@ BOOL LLWindowWin32::handleImeRequests(WPARAM request, LPARAM param, LRESULT *res
S32 context_offset;
LLWString context = find_context(wtext, preedit, preedit_length, &context_offset);
preedit -= context_offset;
- if (preedit_length)
+ preedit_length = llmin(preedit_length, (S32)context.length() - preedit);
+ if (preedit_length && preedit >= 0)
{
// IMR_DOCUMENTFEED may be called when we have an active preedit.
// We should pass the context string *excluding* the preedit string.