--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,13 @@
+2011-09-25  Bruno Haible  <bruno@clisp.org>
+
+	fflush et al.: Document limitation on MSVC.
+	* doc/posix-functions/fflush.texi: Document possible crash in handling
+	mode other than DEFAULT_HANDLING.
+	* doc/posix-functions/fgetc.texi: Likewise.
+	* doc/posix-functions/fputc.texi: Likewise.
+	* doc/posix-functions/fread.texi: Likewise.
+	* doc/posix-functions/fwrite.texi: Likewise.
+
 2011-09-25  Bruno Haible  <bruno@clisp.org>
 
 	msvc-inval: Allow three invalid parameter handling modes.

--- a/doc/posix-functions/fflush.texi
+++ b/doc/posix-functions/fflush.texi
@@ -31,6 +31,12 @@
 On Windows platforms (excluding Cygwin), this function does not set @code{errno}
 upon failure.
 @item
+This function crashes if the stream's file descriptor has already been
+closed, if @code{MSVC_INVALID_PARAMETER_HANDLING} is
+@code{HAIRY_LIBRARY_HANDLING} or @code{SANE_LIBRARY_HANDLING},
+on some platforms:
+MSVC 9.
+@item
 @code{fflush} on an input stream right after @code{ungetc} does not discard
 the @code{ungetc} buffer, on some platforms:
 AIX 5.1, HP-UX 11, IRIX 6.5, OSF/1 5.1, Solaris 11 2010-11, mingw, MSVC 9.

--- a/doc/posix-functions/fgetc.texi
+++ b/doc/posix-functions/fgetc.texi
@@ -20,4 +20,10 @@
 @item
 On Windows platforms (excluding Cygwin), this function does not set @code{errno}
 upon failure.
+@item
+This function crashes if the stream's file descriptor has already been
+closed, if @code{MSVC_INVALID_PARAMETER_HANDLING} is
+@code{HAIRY_LIBRARY_HANDLING} or @code{SANE_LIBRARY_HANDLING},
+on some platforms:
+MSVC 9.
 @end itemize

--- a/doc/posix-functions/fputc.texi
+++ b/doc/posix-functions/fputc.texi
@@ -32,4 +32,10 @@
 On some platforms, this function does not set @code{errno} or the
 stream error indicator on attempts to write to a read-only stream:
 Cygwin 1.7.9.
+@item
+This function crashes if the stream's file descriptor has already been
+closed, if @code{MSVC_INVALID_PARAMETER_HANDLING} is
+@code{HAIRY_LIBRARY_HANDLING} or @code{SANE_LIBRARY_HANDLING},
+on some platforms:
+MSVC 9.
 @end itemize

--- a/doc/posix-functions/fread.texi
+++ b/doc/posix-functions/fread.texi
@@ -20,4 +20,10 @@
 @item
 On Windows platforms (excluding Cygwin), this function does not set @code{errno}
 upon failure.
+@item
+This function crashes if the stream's file descriptor has already been
+closed, if @code{MSVC_INVALID_PARAMETER_HANDLING} is
+@code{HAIRY_LIBRARY_HANDLING} or @code{SANE_LIBRARY_HANDLING},
+on some platforms:
+MSVC 9.
 @end itemize

--- a/doc/posix-functions/fwrite.texi
+++ b/doc/posix-functions/fwrite.texi
@@ -32,4 +32,10 @@
 On some platforms, this function does not set @code{errno} or the
 stream error indicator on attempts to write to a read-only stream:
 Cygwin 1.7.9.
+@item
+This function crashes if the stream's file descriptor has already been
+closed, if @code{MSVC_INVALID_PARAMETER_HANDLING} is
+@code{HAIRY_LIBRARY_HANDLING} or @code{SANE_LIBRARY_HANDLING},
+on some platforms:
+MSVC 9.
 @end itemize