1 STDLIB Release Notes
This document describes the changes made to the STDLIB application.
1.1 STDLIB 1.13.11
1.1.1 Fixed Bugs and Malfunctions
-
When calling
gen_server:enter_loop
with a
registered server name, it was only checked that the
registered name existed, not that it actually was the
name of the calling process.
Own Id: OTP-5854
1.1.2 Improvements and New Features
-
More detail on
beam_lib:version/1
in
documentation.
Own Id: OTP-5789
-
The new function
io:read/3
works like
io:read/1,2
but takes a third argument,
StartLine
.
Own Id: OTP-5813
-
The new function
gen_fsm:enter_loop/4,5,6
, similar
to gen_server:enter_loop/3,4,5
, has been added.
Own Id: OTP-5846 Aux Id: seq10163
-
The function
c:i/1
is now exported.
Own Id: OTP-5848 Aux Id: seq10164
1.2 STDLIB 1.13.10
1.2.1 Fixed Bugs and Malfunctions
-
A couple of type errors have been fixed in
sofs
.
Own Id: OTP-5739
-
The pre-processor used to complain that the macro
definition '
-define(S(S), ??S).
' was circular,
which it isn't. (Thanks to Richard Carlsson.)
Own Id: OTP-5777
1.3 STDLIB 1.13.9
1.3.1 Fixed Bugs and Malfunctions
-
The linter, QLC and the module
erl_pp
did not
handle the new 'fun M:F/A' construct in all situations.
This problem has been fixed.
Own Id: OTP-5644
1.3.2 Improvements and New Features
-
The manual pages for most of the Kernel and some of
the STDLIB modules have been updated, in particular
regarding type definitions.
The documentation of the return value for
erts:info/1
has been corrected.
The documentation for erlang:statistics/1
now
lists all possible arguments.
Own Id: OTP-5360
-
Replaced some tuple funs with the new fun M:F/A
construct.
The high-order functions in the lists module no longer
accept bad funs under any circumstances.
'lists:map(bad_fun, [])
' used to return
'[]
' but now causes an exception.
Unused, broken compatibility code in the ets
module was removed. (Thanks to Dialyzer.)
Eliminated 5 discrepancies found by Dialyzer in the
appmon application.
Own Id: OTP-5633
-
The c:i/0 function will now run in a paged mode if
there are more than 100 processes in the system. (Thanks
to Ulf Wiger.)
erlang:system_info(process_count) has
been optimized and does now return exactly the same value
as length(processes()). Previously
erlang:system_info(process_count) did not include exiting
processes which are included in length(processes()).
The +P flag for 'erl', which sets the maximum number
of processes allowed to exist at the same, no longer
accepts values higher than 134217727. (You will still
probably run out of memory before you'll be able to reach
that limit.)
Own Id: OTP-5645 Aux Id: seq9984
1.4 STDLIB 1.13.8
1.4.1 Fixed Bugs and Malfunctions
-
Very minor corrections in beam_lib and its documentation.
Own Id: OTP-5589
1.4.2 Improvements and New Features
-
The erlang:port_info/1 BIF is now documented. Minor
corrections of the documentation for erlang:port_info/2.
Added a note to the documentation of the math
module that all functions are not available on all
platforms.
Added more information about the '+c' option in the
erl
man page in the erts documentation.
Own Id: OTP-5555
-
The new 'fun M:F/A' construct creates a fun that
refers to the latest version of M:F/A. This syntax is
meant to replace tuple funs '{M,F}' which have many
problems.
The new type test 'is_function(Fun, A)' (which may be
used in guards) test whether Fun is a fun that can be
applied with A arguments. (Currently, Fun can also be a
tuple fun.)
Own Id: OTP-5584
1.5 STDLIB 1.13.7
1.5.1 Fixed Bugs and Malfunctions
-
filelib:wildcard/2
was broken (it ignored its
second argument).
Also, filelib:wildcard("Filename")
(where the
argument does not contain any meta-characters) would
always return ["Filename"]
. Corrected so that an
empty list will be returned if "Filename" does not
actually exist. (Same correction in
filelib:wildcard/2
.) (This change is a slight
incompatibility.)
filelib:wildcard/1,2
will generate a different
exception when given bad patterns such as "{a,". The
exception used to be caused by
'exit(missing_delimiter)
' but is now
'erlang:error({badpattern,missing_delimiter})
'.
Own Id: OTP-5523 Aux Id: seq9824
1.5.2 Improvements and New Features
-
Further improvements of encrypted debug info: New option
'encrypt_debug_info' for compiler.
Own Id: OTP-5541 Aux Id: seq9837
1.6 STDLIB 1.13.6
1.6.1 Fixed Bugs and Malfunctions
-
When opening a Dets table read only an attempt was
sometimes made to re-hash the table resulting in an error
message. This problem has been fixed.
Own Id: OTP-5487 Aux Id: OTP-4989
1.6.2 Improvements and New Features
-
It is now possible to encrypt the debug information in
Beam files, to help keep the source code secret. See the
documentation for compile on how to provide the key for
encrypting, and the documentation for beam_lib on how to
provide the key for decryption so that tools such as the
Debugger, Xref, or Cover can be used.
The beam_lib:chunks/2
functions now accepts an
additional chunk type 'compile_info
' to retrieve
the compilation information directly as a term. (Thanks
to Tobias Lindahl.)
Own Id: OTP-5460 Aux Id: seq9787
1.7 STDLIB 1.13.5
1.7.1 Fixed Bugs and Malfunctions
-
Closing a Dets table kept in RAM would cause a crash if
the file could not be written. This problem has been
fixed by returning an error tuple.
Own Id: OTP-5402
-
erl_pp now correctly pretty-prints 'fun F/A'.
Own Id: OTP-5412
-
The Erlang shell failed if the compiler was not in the
code path. This problem has been fixed, but in order to
evaluate records the compiler is still needed.
Own Id: OTP-5435
-
Corrected the example in the documentation for
ets:match/2. Also clarified that ets:update_counter/3
updates the counter atomically. (Thanks to Anders
Svensson.)
Own Id: OTP-5452 Aux Id: seq9770, seq9789
1.7.2 Improvements and New Features
-
The possibility to start the erlang shell in parallell
with the rest of the system was reintroduced for
backwards compatibility in stdlib-1.13.1. The flag to be
used for this is now called async_shell_start and has
been documented. New shells started from the JCL menu are
not syncronized with init anymore. This makes it possible
to start a new shell (e.g. for debugging purposes) even
if the initial shell hasn't come up.
Own Id: OTP-5406 Aux Id: OTP-5218
-
The compiler will now produce warnings when using the
deprecated functions in the snmp module.
Own Id: OTP-5425
-
The function c:zi/0 has been removed. Use c:i/0 instead.
Own Id: OTP-5432
-
Corrected two minor bugs found by the Dialyzer:
Calling a parameterized module from a restricted shell
(i.e. if shell:start_restricted/1 has been used) would
crash the shell evaluator. A debug printout in gen_fsm
had a clause that would never match; causing less
information to be printed.
And a somewhat more serious one also found by
Dialyzer: rpc:yield/1 would crash unless the call started
by rpc:async_call/4 had already finished;
rpc:nb_yield(Key, infinity) would also crash.
Cleaned up and removed redundant code found by
Dialyzer in erlang:dmonitor_p/2.
Own Id: OTP-5462
1.8 STDLIB 1.13.4
1.8.1 Fixed Bugs and Malfunctions
-
Bugs in the Erlang shell have been fixed.
Own Id: OTP-5327
-
Some dead code reported by Dialyzer was eliminated.
A
bug in 'dbg' when tracing to wrap trace files has been
corrected. It failed to delete any already existing wrap
trace files with the same names when starting a new wrap
trace.
Own Id: OTP-5329
-
The linter could output invalid warnings about bit
patterns in record initializations. This problem has been
fixed.
Own Id: OTP-5338
-
ordsets:is_set(NoList), where NoList is any term except a
list, would crash. For consistency with
sets:is_set/1
and gb_sets:is_set/1>, it now
returns '<c>false
'.
Own Id: OTP-5341
-
A BIF erlang:raise/3 has been added. See the manual for
details. It is intended for internal system programming
only, advanced error handling.
Own Id: OTP-5376 Aux Id: OTP-5257
1.8.2 Improvements and New Features
-
The
deprecated
attribute is now checked by the
linter. See xref(3)
for a description of the
deprecated
attribute.
Own Id: OTP-5276
-
The restricted shell will now indicate if the return
value from a user predicate is on an incorrect form.
Own Id: OTP-5335
1.9 STDLIB 1.13.3
1.9.1 Fixed Bugs and Malfunctions
-
Bugs concerning unused and shadowed variables have been
fixed in the linter.
Own Id: OTP-5091
-
A bug in the evaluator that caused the shell to choke on
bit syntax expressions has been fixed.
Own Id: OTP-5237
-
io:format/2 et.al no longer crashes for some combinations
of precision and value for format character "g".
Previously it crashed if the precision P was 4 or lower
and the absolute value of the float to print was lower
than 10^4 but 10^(P-1) or higher. Now it will not crash
depending on the value of the float.
Own Id: OTP-5263
-
Bugs in the handling of the bit syntax have been fixed in
the Erlang shell.
Own Id: OTP-5269
-
gb_sets:del_element/2
was changed to do the
same as gb_sets:delete_any/2
which was the
original intention, not as gb_sets:delete/2
. Code
that relies on gb_sets:del_element/2
causing an
error if the element does not exist must be changed to
call gb_sets:delete/2
instead.
The documentation was also updated to explicitly
document functions that were only referered to as
'aliases' of a documented function. Also, a list of all
functions common to the gb_sets
, sets
, and
ordsets
was added.
Own Id: OTP-5277
-
Debug messages have been removed from the QLC module.
Own Id: OTP-5283
1.9.2 Improvements and New Features
-
The size of continuations returned from
dets:match/1,3
, dets:match_object/1,3
, and
dets:select/1,3
has been reduced. This affects the
amount of data Mnesia sends between nodes while
evaluating QLC queries.
Own Id: OTP-5232
1.10 STDLIB 1.13.2
1.10.1 Improvements and New Features
-
The -rsh switch for starting a remote shell (introduced
with OTP-5210) clashed with an already existing switch
used by slave. Therefore the switch for the remote shell
is now instead named -remsh.
Own Id: OTP-5248 Aux Id: OTP-5210
1.11 STDLIB 1.13.1
1.11.1 Fixed Bugs and Malfunctions
-
The pman 'trace shell' functionality was broken as has
now been fixed. Furthermore, pman could not correctly
find the pid of the active shell if more than one shell
process was running on the node. This has also been
corrected.
Own Id: OTP-5191
-
When the undocumented feature "parameterized modules was
used, the ?MODULE macro did not work correctly.
Own Id: OTP-5224
1.11.2 Improvements and New Features
-
You can now start Erlang with the -rsh flag which gives
you a remote initial shell instead of a local one.
Example: erl -sname this_node -rsh other_node@other_host
Own Id: OTP-5210
-
The man page for the
lists
module has been updated
with decscription of the new zip
, unzip
,
and partition/2
functions.
Own Id: OTP-5213
-
The top level group leader used to be listed as job #1 in
the job list in JCL mode. Since there is no shell
associated with this process that can be connected to, it
will no longer be listed.
Own Id: OTP-5214
-
The possibility to start the erlang shell in parallell
with the rest of the system has been reintroduced for
backwards compatibility. Note that this old behaviour is
error prone and should not be used unless for some reason
necessary.
Own Id: OTP-5218 Aux Id: seq9534
-
The
shell
commands rr/1,2,3
now accepts
wildcards when reading record definitions from BEAM
files.
Own Id: OTP-5226
1.12 STDLIB 1.13
1.12.1 Fixed Bugs and Malfunctions
-
gen_server:s internal function get_parent, called by
gen_server:enter_loop/[4,5], now returns the pid of
parents that are registered processes, instead of
returning their name. The reason for this is that
gen_server relies on that the parent is represented as a
pid. This error in get_parent/0 had the effect that the
terminate function of the child was not run when it was
shutdown.
Own Id: OTP-4820 Aux Id: seq8170
-
For the bit syntax, when matching with a size field that
is bound during the same matching, a warning for unused
variable was emitted. This bug has been fixed.
Own Id: OTP-4858
-
When parsing a badly formed file
epp
hangs. This
problem has been fixed.
Own Id: OTP-4871 Aux Id: OTP-4870
-
Bugs concerning guards have been fixed in the Erlang
interpreter.
Own Id: OTP-4885
-
The linter now checks the record name when calling the
function
erlang:is_record/2
.
Own Id: OTP-4886
-
Guards of mach specifications are corrected to resemble
the semantics of guards in real code more closely. The
implementation now corresponds to the documentation in
erts users guide. The following things are corrected:
-
Guard sematics was wrong when it came to
logical operators and exceptions. {'or',
{'is_integer','$1'}, {'or', '$1', '$1'}} evaluated to
true with '$1' bound to an integer.
-
Unary +
and - was not implemented
-
Calling operators
as Bif's was not supported by ets/dbg:fun2ms
(erlang:'or'(A,B) etc)
-
Old typetests (like
integer(X) instead of is_integer(X)) was not supported by
ets/dbg:fun2ms
-
Semicolon (;) in guards was
not supported by ets/dbg:fun2ms
*** POTENTIAL INCOMPATIBILITY ***
Own Id: OTP-4927
-
A bug that could cause a crash has been fixed in the
file_sorter
module. The crash could only occur
when sorting or merging to a file and the input function
returned {end_of_input, Value}
.
Own Id: OTP-5009
-
A function clause exit in filelib:fold_files/5 has been
fixed.
Own Id: OTP-5137
-
filelib:fold_files/5 has been fixed to not include
directories that match the regular expression in the
result. In this process, filelib:is_regular/1 has been
added to the module. WARNING the behaviour of
filelib:fold_files/5 has also been changed so the regexp
match is tried not on the full name, but locally in each
traversed directory.
Own Id: OTP-5171 Aux Id: OTP-5128
1.12.2 Improvements and New Features
-
The initial shell process started in parallell with the
init boot process. This made it possible to pipe commands
to the shell that got evaluated before the system had
booted properly. Also the shell was normally accessible
before .erlang had been evaluated and this caused
problems especially related to code loading. This has now
been fixed so that the initial shell is not accessible
until after the init boot routine has finished and
.erlang has been evaluated. Note that the shell starts
before any -s arguments are executed.
Own Id: OTP-4877
-
It is now possible to compile files with erlc without
getting a lot of (for compilation) unneccessary code
loaded and executed (like distribution, inet config,
etc). erlc now also calls erl with
-boot
start_clean
(so that sasl is not started even if
start_sasl
is default boot script).
Own Id: OTP-4878
-
Dets tables can now be opened or closed in parallel. In
particular, if some table is being repaired, other tables
can still be opened or closed.
Own Id: OTP-4908
-
The new STDLIB module
qlc
implements a query
language with a list comprehension syntax completely
embedded in Erlang. There is support for reading data
from ETS, Dets, and Mnesia tables as well as for defining
other sources of data. For easy testing queries can be
stated in the Erlang shell. The qlc
module aims at
replacing Mnemosyne. See qlc(3)
for details and
examples.
Own Id: OTP-5043
-
Some support for records has been added to the Erlang
shell. There are commands for reading record definitions
from files and for manipulating record definitions in the
shell. The record syntax can be used in the shell and
return values are printed as records when possible using
the records definitions known to the shell. New commands
in the shell are
rd/2
, rf/0,1
,
rl/0,1
, rp/1
, and rr/1,2,3
. Existing
functions in user_default.erl
with any of these
names need to be renamed. See shell(3)
for further
details.
*** POTENTIAL INCOMPATIBILITY ***
Own Id: OTP-5063
-
A new function, string:to_integer/1, has been added.
Own Id: OTP-5081 Aux Id: OTP-5136
-
The new function
dets:repair_continuation/2
can be
used for restoring an opaque continuation returned by
dets:select/1
or dets:select/3
if the
continuation has passed through the external term format
(been sent between nodes or stored on disk).
Own Id: OTP-5126
-
A new function, string:to_float/1, has been added.
Own Id: OTP-5136 Aux Id: OTP-5081
-
Test cases have been added for string.
Own Id: OTP-5138
1.13 STDLIB 1.12.8
1.13.1 Improvements and New Features
-
The functions ets:insert_new/2 and dets:insert_new/2 are
added. Please consult the manual pages for details.
Own Id: OTP-5075
-
New function: proc_lib:hibernate/3. Processes spawned
using proc_lib (also indirectly, such as gen_server
process), should use this function instead of the BIF
erlang:hibernate/3 directly to ensure that the exception
handler for the process continues to work when the
process is awaken.
Own Id: OTP-5077
1.14 STDLIB 1.12.6
1.14.1 Fixed Bugs and Malfunctions
-
If many files or sockets were open (more than 256),
beam_lib operations could fail. Corrected.
Own Id: OTP-5046 Aux Id: OTP-4997, seq8590
1.15 STDLIB 1.12.5
1.15.1 Fixed Bugs and Malfunctions
-
When opening a Dets table read only an attempt was made
to re-hash the table resulting in an error message. This
problem has been fixed.
Own Id: OTP-4989 Aux Id: seq8536
1.15.2 Improvements and New Features
-
If a gen_server, gen_event or gen_fsm process exits with
{undef,[{M,F,A}|...]}, the error report will now state if
the function call failed because the module could not be
loaded or because the function was not exported.
Own Id: OTP-4952 Aux Id: OTP-4925
1.16 STDLIB 1.12.4
1.16.1 Fixed Bugs and Malfunctions
-
The shell function
c:regs()
did crash if there was
a registered port among the registered names. This is now
corrected.
Own Id: OTP-4890
-
A bug has been fixed in
Dets
: not all objects were
always visible in tables with more than 131072 keys
Own Id: OTP-4906
-
A bug has been fixed in
Dets
: when trying to
repair a version 9 table, a not_a_dets_file
error
message was returned unnecessarily often.
Own Id: OTP-4907
1.16.2 Improvements and New Features
-
Starting Erlang with the +Bi flag (to ignore ^C), now
also disables the quit ('q') option in the JCL menu.
Own Id: OTP-4897
1.17 STDLIB 1.12.3
1.17.1 Fixed Bugs and Malfunctions
-
A bug in erl_scan caused the compiler to hang when
end-of-file in a comment was encountered. This is now
corrected.
Own Id: OTP-4787
-
The linter now reports errors for unsafe variables when
the option
nowarn_unused_vars
is given.
Own Id: OTP-4831 Aux Id: seq8202
-
gen_server:cast/2
now crashes for invalid
arguments.
gen_server:abcast/2-3
now crashes for invalid
arguments. The behaviour when casting to the name
global
has been corrected. Previously,
gen_server:abcast(global,[node@host])
tried to
cast to the globally registered name node@host
,
which is more of a bug than less. Now such a call will
cast to the registered name global
at the node
node@host
as (probably) expected.
An rpc:call/5
and rpc:block_call/5
having a timeout argument has been added.
rpc:abcast/2-3
has been improved not to get
stuck waiting for connection setup if the remote node is
not connected. In this case the send is spawned off to a
temporary process.
Two typos in the docs for module calendar
has
been corrected thanks to Bengt Kleberg.
*** POTENTIAL INCOMPATIBILITY ***
Own Id: OTP-4844 Aux Id: seq8226
1.17.2 Improvements and New Features
-
The f/1 shell command did not work correctly with
restricted shell.
Own Id: OTP-4818
1.18 STDLIB 1.12.2
1.18.1 Fixed Bugs and Malfunctions
-
gen_server:s internal function get_parent, called by
gen_server:enter_loop/[4,5], now returns the pid of
parents that are registered processes, instead of
returning their name. The reason for this is that
gen_server relies on that the parent is represented as a
pid. This error in get_parent/0 had the effect that the
terminate function of the child was not run when it was
shutdown.
Own Id: OTP-4820 Aux Id: seq8170
1.19 STDLIB 1.12.1
1.19.1 Fixed Bugs and Malfunctions
-
The code server could hang if invoked early in the
startup. For example if the emulator was started with "-s
file eval Filename" and Filename contained a call to
code:add_patha/1 the code server accidentally tried to
execute code in an unloaded module from inside the code
that loaded a module - hence hangup. This bug has now
been fixed.
Note! Starting erlang through code loading
from a remote erlang boot server will not work after this
patch. It will be fixed in a later patch. Rumours has it
that remote boot server code loading did not work before
this patch either. It is not a commonly used feature.
*** POTENTIAL INCOMPATIBILITY ***
Own Id: OTP-4802 Aux Id: seq8314
Copyright © 1991-2005
Ericsson AB