Prepare release

2 files changed, 439 insertions, 1 deletions

diff --git a/lib/stdlib/doc/src/notes.xml b/lib/stdlib/doc/src/notes.xml
index a8a252cb35..46454e9b80 100644
--- a/lib/stdlib/doc/src/notes.xml
+++ b/lib/stdlib/doc/src/notes.xml
@@ -31,6 +31,444 @@
   </header>
   <p>This document describes the changes made to the STDLIB application.</p>
 
+<section><title>STDLIB 3.4</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+	    <p>For many releases, it has been legal to override a BIF
+	    with a local function having the same name. However,
+	    calling a local function with the same name as guard BIF
+	    as filter in a list comprehension was not allowed.</p>
+          <p>
+	    Own Id: OTP-13690</p>
+        </item>
+        <item>
+	    <p> A new (default) pseudo-random number generator
+	    algorithm Xoroshiro116+ has been implemented in the
+	    <c>rand</c> module. </p><p> The old algorithm
+	    implementations had a number of flaws so they are all
+	    deprecated, but corrected versions of two of them have
+	    been added. See the documentation. </p>
+          <p>
+	    Own Id: OTP-14295 Aux Id: PR-1372 </p>
+        </item>
+        <item>
+	    <p> The Erlang shell, <c>qlc:string_to_handle()</c>, and
+	    the Debugger (the Evaluator area and Edit variable window
+	    of the Bindings area) can parse pids, ports, references,
+	    and external funs, as long as they can be created in the
+	    running system. </p>
+          <p>
+	    Own Id: OTP-14296</p>
+        </item>
+        <item>
+	    <p>Internal code change: Calls to <c>catch</c> followed
+	    by a call to <c>erlang:get_stacktrace/0</c> has been
+	    rewritten to use <c>try</c> instead of <c>catch</c> to
+	    make the code future-proof.</p>
+          <p>
+	    Own Id: OTP-14400</p>
+        </item>
+        <item>
+	    <p> The <c>ms_transform</c> module, used by
+	    <c>ets:fun2ms/1</c> and <c>dbg:fun2ms/1</c>, evaluates
+	    constant arithmetic expressions. This is necessary since
+	    the Erlang compiler, which normally evaluates constant
+	    expressions, does not recognize the format generated by
+	    <c>ms_transform</c>. </p>
+          <p>
+	    Own Id: OTP-14454 Aux Id: ERIERL-29 </p>
+        </item>
+        <item>
+	    <p> The state machine engine <c>gen_statem</c> can now
+	    handle generic time-outs (multiple named) as well as
+	    absolute time-out time. See the documentation. </p><p>
+	    The <c>gen_statem</c> callback <c>Module:init/1</c> has
+	    become mandatory to harmonize with other <c>gen_*</c>
+	    modules. This may be an incompatibility for
+	    <c>gen_statem</c> callback modules that use
+	    <c>gen_statem:enter_loop/4-6</c>. </p>
+          <p>
+	    *** POTENTIAL INCOMPATIBILITY ***</p>
+          <p>
+	    Own Id: OTP-14531</p>
+        </item>
+      </list>
+    </section>
+
+
+    <section><title>Improvements and New Features</title>
+      <list>
+        <item>
+          <p>
+	    Improved unicode support for strings. Added normalization
+	    functions in the <c>unicode</c> module. Extended the
+	    <c>string</c> module API with new functions with improved
+	    unicode handling and that works on grapheme clusters. The
+	    new functions operates on the <c>unicode:chardata()</c>
+	    type, thus they also accept <c>UTF-8 binaries</c> as
+	    input. </p>
+          <p>
+	    The old string API have been marked as obsolete. The
+	    return values have been changed for some error cases.</p>
+          <p>
+	    *** POTENTIAL INCOMPATIBILITY ***</p>
+          <p>
+	    Own Id: OTP-10289 Aux Id: OTP-10309 </p>
+        </item>
+        <item>
+	    <p>There are two new guard BIFs '<c>floor/1</c>' and
+	    '<c>ceil/1</c>'. They both return integers. In the
+	    '<c>math</c>' module, there are two new BIFs with the
+	    same names that return floating point values.</p>
+          <p>
+	    Own Id: OTP-13692</p>
+        </item>
+        <item>
+          <p>
+	    Making code_change, terminate and handle_info callbacks
+	    optional in the OTP behaviours.</p>
+          <p>
+	    Own Id: OTP-13801</p>
+        </item>
+        <item>
+	    <p> The support for Dets files created with Erlang/OTP R7
+	    and earlier is removed. </p>
+          <p>
+	    Own Id: OTP-13830</p>
+        </item>
+        <item>
+	    <p>Replaced usage of deprecated symbolic <seealso
+	    marker="erts:erlang#type-time_unit"><c>time
+	    unit</c></seealso> representations.</p>
+          <p>
+	    Own Id: OTP-13831 Aux Id: OTP-13735 </p>
+        </item>
+        <item>
+	    <p>The function <c>fmod/2</c> has been added to the
+	    <c>math</c> module.</p>
+          <p>
+	    Own Id: OTP-14000</p>
+        </item>
+        <item>
+	    <p>The EXIT signals received from processes using
+	    <c>proc_lib</c> now looks like EXIT signals from
+	    processes that were spawned using <c>spawn_link</c>. In
+	    particular, that means that the stack trace is now
+	    included in the EXIT signal so that it can see where the
+	    process crashed.</p>
+          <p>
+	    Own Id: OTP-14001</p>
+        </item>
+        <item>
+	    <p><c>sets:add_element/2</c> is faster when adding an
+	    element that is already present, and
+	    <c>sets:del_element/2</c> is faster when the element to
+	    be deleted is not present. This optimization can make
+	    certain operations, such as sets:union/2 with many
+	    overlapping elements, up to two orders of magnitude
+	    faster.</p>
+          <p>
+	    Own Id: OTP-14035</p>
+        </item>
+        <item>
+          <p>
+	    Add information in doc about supervisor shutdown reason
+	    when maximum restart frequency is reached.</p>
+          <p>
+	    Own Id: OTP-14037 Aux Id: PR-1233 </p>
+        </item>
+        <item>
+          <p>
+	    Added <c>rand:jump/[0|1]</c> functions.</p>
+          <p>
+	    Own Id: OTP-14038 Aux Id: PR-1235 </p>
+        </item>
+        <item>
+	    <p>Functions for detecting changed code has been added.
+	    <c>code:modified_modules/0</c> returns all currently
+	    loaded modules that have changed on disk.
+	    <c>code:module_status/1</c> returns the status for a
+	    module. In the shell and in <c>c</c> module, <c>mm/0</c>
+	    is short for <c>code:modified_modules/0</c>, and
+	    <c>lm/0</c> reloads all currently loaded modules that
+	    have changed on disk.</p>
+          <p>
+	    Own Id: OTP-14059</p>
+        </item>
+        <item>
+	    <p>Each assert macro in <c>assert.hrl</c> now has a
+	    corresponding version with an extra argument, for adding
+	    comments to assertions. These can for example be printed
+	    as part of error reports, to clarify the meaning of the
+	    check that failed.</p>
+          <p>
+	    Own Id: OTP-14066</p>
+        </item>
+        <item>
+	    <p><c>error_logger_tty_h</c> and
+	    <c>error_logger_file_h</c> now inserts the node
+	    information for nonlocal messages before the message
+	    itself instead of after, both for readability and so as
+	    not to change the line termination property at the end of
+	    the message.</p>
+          <p>
+	    Own Id: OTP-14068</p>
+        </item>
+        <item>
+	    <p>The Erlang code linter checks for badly formed type
+	    constraints. </p>
+          <p>
+	    Own Id: OTP-14070 Aux Id: PR-1214 </p>
+        </item>
+        <item>
+	    <p>By default, there will now be a warning when
+	    <c>export_all</c> is used. The warning can be disabled
+	    using <c>nowarn_export_all</c>.</p>
+          <p>
+	    Own Id: OTP-14071</p>
+        </item>
+        <item>
+	    <p>When a <c>gen_server</c> process crashes, the
+	    stacktrace for the client will be printed to facilitate
+	    debugging.</p>
+          <p>
+	    Own Id: OTP-14089</p>
+        </item>
+        <item>
+	    <p>Optimized ETS operations by changing table identifier
+	    type from integer to reference. The reference enables a
+	    more direct mapping to the table with less potential lock
+	    contention and makes especially creation and deletion of
+	    tables scale much better.</p> <p>The change of the opaque
+	    type for the ETS table identifiers may cause failure in
+	    code that make faulty assumptions about this opaque
+	    type.</p> <note> <p> The number of tables stored at one
+	    Erlang node <em>used</em> to be limited. This is no
+	    longer the case (except by memory usage). The previous
+	    default limit was about 1400 tables and could be
+	    increased by setting the environment variable
+	    <c>ERL_MAX_ETS_TABLES</c> before starting the Erlang
+	    runtime system. This hard limit has been removed, but it
+	    is currently useful to set the <c>ERL_MAX_ETS_TABLES</c>
+	    anyway. It should be set to an approximate of the maximum
+	    amount of tables used. This since an internal table for
+	    named tables is sized using this value. If large amounts
+	    of named tables are used and <c>ERL_MAX_ETS_TABLES</c>
+	    hasn't been increased, the performance of named table
+	    lookup will degrade. </p> </note>
+          <p>
+	    *** POTENTIAL INCOMPATIBILITY ***</p>
+          <p>
+	    Own Id: OTP-14094</p>
+        </item>
+        <item>
+	    <p><c>take/2</c> has been added to <c>dict</c>,
+	    <c>orddict</c>, and <c>gb_trees</c>. <c>take_any/2</c>
+	    has been added to <c>gb_trees</c>.</p>
+          <p>
+	    Own Id: OTP-14102</p>
+        </item>
+        <item>
+          <p>
+	    Extend gen_event API to handle options as well.</p>
+          <p>
+	    Own Id: OTP-14123</p>
+        </item>
+        <item>
+          <p>
+	    Advice on how to tune the supervisor restart frequency
+	    (intensity and period) is added to System Documentation -
+	    Design Principles - Supervisor Behaviour.</p>
+          <p>
+	    Own Id: OTP-14168 Aux Id: PR-1289 </p>
+        </item>
+        <item>
+          <p>
+	    gen_fsm is deprecated and is replaced by gen_statem,
+	    however for backwards compatibility reasons gen_fsm may
+	    continue to exist as an undocumented feature for quite
+	    some time.</p>
+          <p>
+	    Own Id: OTP-14183</p>
+        </item>
+        <item>
+	    <p>The shell functions <c>c/1</c> and <c>c/2</c> have
+	    been extended so that if the argument is a module name
+	    instead of a file name, it automatically locates the
+	    .beam file and the corresponding source file, and then
+	    recompiles the module using the same compiler options
+	    (plus any options passed to c/2). If compilation fails,
+	    the old beam file is preserved. Also adds <c>c(Mod, Opts,
+	    Filter)</c>, where the Filter argument allows you to
+	    remove old compiler options before the new options are
+	    added.</p> <p>New utility functions <c>file_find/2/3</c>
+	    and <c>find_source/1/2/3</c> have been added to
+	    <c>filelib</c>.</p>
+          <p>
+	    Own Id: OTP-14190</p>
+        </item>
+        <item>
+	    <p><c>erl_tar</c> in previous versions of OTP only
+	    supports the USTAR format. That limited path names to at
+	    most 255 bytes, and did not support Unicode characters in
+	    names in a portable way.</p>
+	    <p><c>erl_tar</c> now has support for reading tar
+	    archives in the formats currently in common use, such as
+	    v7, STAR, USTAR, PAX, and GNU tar's extensions to the
+	    STAR/USTAR format. When writing tar archives,
+	    <c>erl_tar</c> can now write them in the <c>PAX</c>
+	    format if necessary (for example, to support very long
+	    filenames or filenames with Unicode characters). If
+	    possible, <c>erl_tar</c> will still write tar archives in
+	    the USTAR for maximum portability.</p>
+          <p>
+	    Own Id: OTP-14226</p>
+        </item>
+        <item>
+	    <p><c>base64:mime_decode/1</c> has been optimized so that
+	    it is now almost as fast as<c>base64:decode/1</c>; it
+	    used be noticeably slower.</p>
+          <p>
+	    Own Id: OTP-14245</p>
+        </item>
+        <item>
+	    <p><c>erl_tar</c> will now strip any leading '<c>/</c>'
+	    from pathnames when extracting files from a tar archive
+	    and write a message to the error logger. There is also
+	    new check for directory traversal attacks; if a relative
+	    path points above the current working directory the
+	    extraction will be aborted.</p>
+          <p>
+	    Own Id: OTP-14278</p>
+        </item>
+        <item>
+	    <p> Miscellaneous updates due to atoms containing
+	    arbitrary Unicode characters. </p>
+          <p>
+	    Own Id: OTP-14285</p>
+        </item>
+        <item>
+          <p>
+	    The Crypto application now supports generation of
+	    cryptographically strong random numbers (floats &lt; 1.0
+	    and integer arbitrary ranges) as a plugin to the 'rand'
+	    module.</p>
+          <p>
+	    Own Id: OTP-14317 Aux Id: PR-1372 </p>
+        </item>
+        <item>
+          <p>
+	    Add new function <c>ets:select_replace/2</c> which
+	    performs atomic "compare-and-swap" operations for ETS
+	    objects using match specifications.</p>
+          <p>
+	    Own Id: OTP-14319 Aux Id: PR-1076 </p>
+        </item>
+        <item>
+	    <p> The Erlang code linter checks for bad <c>dialyzer</c>
+	    attributes. It also checks for bad type variables in type
+	    declarations. </p>
+          <p>
+	    Own Id: OTP-14323</p>
+        </item>
+        <item>
+	    <p> Two new functions has been implemented in the
+	    <c>rand</c> module; <c>normal/2</c> and
+	    <c>normal_s/3</c>, that both produce normal distribution
+	    (pseudo) random numbers with mean value and variance
+	    according to arguments. </p>
+          <p>
+	    Own Id: OTP-14328 Aux Id: PR-1382 </p>
+        </item>
+        <item>
+          <p>
+	    Upgraded the OTP internal PCRE library from version 8.33
+	    to version 8.40. This library is used for implementation
+	    of the <seealso marker="stdlib:re"><c>re</c></seealso>
+	    regular expressions module.</p>
+          <p>
+	    Besides various bug fixes, the new version allows for
+	    better stack protection. In order to utilize this
+	    feature, the stack size of normal scheduler threads is
+	    now by default set to 128 kilo words on all platforms.
+	    The stack size of normal scheduler threads can be set
+	    upon system start by passing the <seealso
+	    marker="erts:erl#sched_thread_stack_size"><c>+sss</c></seealso>
+	    command line argument to the <seealso
+	    marker="erts:erl"><c>erl</c></seealso> command.</p>
+          <p>
+	    See <url
+	    href="http://pcre.org/original/changelog.txt"><c>http://pcre.org/original/changelog.txt</c></url>
+	    for information about changes made to PCRE between the
+	    versions 8.33 and 8.40.</p>
+          <p>
+	    *** POTENTIAL INCOMPATIBILITY ***</p>
+          <p>
+	    Own Id: OTP-14331 Aux Id: ERL-208 </p>
+        </item>
+        <item>
+          <p>
+	    Added function <c>re:version/0</c> which returns
+	    information about the OTP internal PCRE version used for
+	    implementation of the <c>re</c> module.</p>
+          <p>
+	    Own Id: OTP-14347 Aux Id: PR-1412 </p>
+        </item>
+        <item>
+	    <p>The format of debug information that is stored in BEAM
+	    files (when <c>debug_info</c> is used) has been changed.
+	    The purpose of the change is to better support other
+	    BEAM-based languages such as Elixir or LFE.</p>
+	    <p>All tools included in OTP (dialyzer, debugger, cover,
+	    and so on) will handle both the new format and the
+	    previous format. Tools that retrieve the debug
+	    information using <c>beam_lib:chunk(Beam,
+	    [abstract_code])</c> will continue to work with both the
+	    new and old format. Tools that call
+	    <c>beam_lib:chunk(Beam, ["Abst"])</c> will not work with
+	    the new format.</p>
+	    <p>For more information, see the description of
+	    <c>debug_info</c> in the documentation for
+	    <c>beam_lib</c> and the description of the
+	    <c>{debug_info,{Backend,Data}}</c> option in the
+	    documentation for <c>compile</c>.</p>
+          <p>
+	    Own Id: OTP-14369 Aux Id: PR-1367 </p>
+        </item>
+        <item>
+          <p>
+	    Add option hibernate_after to gen_server, gen_statem and
+	    gen_event. Also added to the deprecated gen_fsm
+	    behaviour.</p>
+          <p>
+	    Own Id: OTP-14405</p>
+        </item>
+        <item>
+	    <p> The size of crash reports created by
+	    <c>gen_server</c>, <c>gen_statem</c> and <c>proc_lib</c>
+	    is limited with aid of the Kernel application variable
+	    <c>error_logger_format_depth</c>. The purpose is to limit
+	    the size of the messages sent to the <c>error_logger</c>
+	    process when processes with huge message queues or states
+	    crash. </p> <p>The crash report generated by
+	    <c>proc_lib</c> includes the new tag
+	    <c>message_queue_len</c>. The neighbour report also
+	    includes the new tag <c>current_stacktrace</c>. Finally,
+	    the neighbour report no longer includes the tags
+	    <c>messages</c> and <c>dictionary</c>. </p> <p> The new
+	    function <c>error_logger:get_format_depth/0</c> can be
+	    used to retrieve the value of the Kernel application
+	    variable <c>error_logger_format_depth</c>. </p>
+          <p>
+	    Own Id: OTP-14417</p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
 <section><title>STDLIB 3.3</title>
 
     <section><title>Fixed Bugs and Malfunctions</title>
diff --git a/lib/stdlib/vsn.mk b/lib/stdlib/vsn.mk
index f7bd21472c..f062c7fe6e 100644
--- a/lib/stdlib/vsn.mk
+++ b/lib/stdlib/vsn.mk
@@ -1 +1 @@
-STDLIB_VSN = 3.3
+STDLIB_VSN = 3.4