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'dumbbell/mnesia-hang-if-remote-stopped-after-proto-negotiation' into maint
* dumbbell/mnesia-hang-if-remote-stopped-after-proto-negotiation:
mnesia: Check nodes after protocol negotiation
OTP-12473
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During Mnesia startup, after protocol negotiation, the list of connected
nodes is written to "recover_nodes". This list is later used to merge
the schema.
If Mnesia was stopped on a remote node between the protocol negotiation
and the moment the list is stored in "recover_nodes", the remote node
is still considered running: the value of "recover_nodes" stored during
mnesia_down/1 is overwritten. Therefore, this node may be used to
acquire a write lock on the schema in order to perform the merge. In
this case, the remote node never answers to the lock request and Mnesia
hang forever (application:start(mnesia) never returns).
To fix the problem, we check the list one last time and remove from it
all nodes where Mnesia is stopped. And because there is still a chance
for missing mnesia_down event, handle_cast({mnesia_down, ...}, ...)
writes to recover_nodes again, in addition to mnesia_down/1.
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For comparison with file time stamps os:timestamp makes more sense
and is present in 17 as well as 18.
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* ia/ssl/pem-cache/OTP-12464:
ssl: Improve PEM cache by validating entries
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The PEM cache is now validated by a background process, instead of
always keeping it if it is small enough and clearing it otherwhiss.
That strategy required that small caches where cleared by API function
if a file changes on disk.
However document the clearing API function as it can still be usefull.
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* scrapinghub/httpc_set_cookie_with_empty_values:
inets: parse correctly 'Set-Cookie' header with empty value
OTP-12455
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Since '=:=' is cheaper than '==', the compiler tries to replace
'==' with '=:=' if the result of comparison will be the same.
As an example:
V == {a,b}
can be rewritten to:
V =:= {a,b}
since the literal on the right side contains no numeric values
that '==' would compare differently to '=:='.
With the introduction of maps, we will need to take them into
account. Since the comparison of maps is planned to change in 18.0,
we will be very conservative and only do the optimization if
both keys and values are non-numeric.
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httpc_cookie should parse cookies with empty values
and no attributes set in the 'Set-Cookie' headers.
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We must not convert map patterns to map expressions.
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In code such as:
case {a,Map} of
{a,#{}}=T ->
T
end
we must NOT rewrite a map pattern to a map expression like this:
case Map of
#{} ->
{a,#{}}
end
because the pattern '#{}' will match any map, but the expression
'#{}' will construct an empty map.
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* ia/ssl/self-signed-root/OTP-12449:
ssl: Remove selfsigned anchor certificate from the certificate chain
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A selfsigned trusted anchor should not be in the certifcate chain passed to
the certificate path validation.
Conflicts:
lib/ssl/src/ssl_certificate.erl
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Gracefully handle invalid content-lenght headers instead of
crashing in list_to_integer.
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* 0xAX/inets-typo-fix:
lib/inets: fix typo in httpd_load_test example
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* s1n4/httpc_invalid_set_cookies/OTP-12430:
httpc: Avoid parsing invalid 'Set-Cookie' headers
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* ia/ssh/sftp-v3-flags:
ssh: Add some more flags
ssh: Correct Sftp flag handling
ssh: Add handling of sftp v3 flags
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* ia/ssl/maint/poddle/OTP-12420:
ssl: Reenable padding check for TLS-1.0 and provide backwards compatible disable option
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* egil/fix-lcnt/OTP-12364:
tools: Fix lcnt printout of histograms
tools: Fix lcnt sort of inspected locks
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* nox/standard_error/OTP-12424:
Test standard_error
Properly handle broken input in standard_error
Fix io:getopts(standard_error)
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* marcus/rabbe-doc-typos2/OTP-12399:
fix spelling
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disable option
Conflicts:
lib/ssl/src/ssl_cipher.erl
lib/ssl/src/ssl_record.erl
lib/ssl/src/tls_record.erl
lib/ssl/test/ssl_cipher_SUITE.erl
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Function name was somewhat confusing and when trying to find a better
name for it we realised it did not work as intended.
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* bjorn/compiler/map-pattern/OTP-12414:
core_lib: Handle patterns in map values
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io:put_chars(standard_error, [oops]) could previously crash the
standard_error process.
Reported-by: Alexei Sholik
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Parsing invalid 'Set-Cookie' header would make httpc crash.
This commit filters invalid 'Set-Cookie' headers so that httpc wouldn't try to parse them.
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core_lib:is_var_used/2 would not consider a variable used in the
value of a map pattern such as:
case Map of
#{key := <<42:N>>} -> ok
end
Here the variable 'N' would not be considered used.
It was assumed that there was no need to check map patterns at
all, since maps currently don't support variables in keys.
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* mikpe/hipe-fconv-fmove-fixes/OTP-12413:
hipe: rtl: fix phi_remove_pred/2 FP moves
hipe: backends: correct #fconv{} translation
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* bjorn/compiler/map-in-record-bug/OTP-12402:
sys_core_fold: Correct optimization of 'case'
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* bjorn/compiler/beam_bool/OTP-12410:
beam_bool: Correct live calculation for GC BIFs
beam_bool: Correct indentation for try...catch
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OTP-12406
* richcarl/syntax_tools-fix-bad-error-format:
fix bad format of error in epp_dodger:parse_file/3
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* arekinath/openbsd-build/OTP-12404:
Fix compile breakage on OpenBSD
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When optimizing boolean expressions, it is not always possible
to find a number of live registers for a GC BIF that both preserves
all source registers that will be tested and at the same time
does not include registers that are not initialized.
As currently implemented, we have incomplete information about
the register calculated from the free variables. Some registers
are marked as "reserved". Reserved registers means that we don't
know anything about them; they may or may not be initialized.
As a conservative correction (suitable for a maintenance release), we
will abort the optimization if we find any reserved registers when
calculating the number of live registers. We will not attempt to
improve the information about the registers in this commit.
By examining the coverage when running the existing compiler test
suite we find that the optimization is aborted 15 times (before
adding any new test cases). To put that in perspective, the
optimization is successfully applied 4927 times, and aborted for
other reasons 547 times.
Reported-by: Ulf Norell
Reported-by: Anthony Ramine
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Old versions of the Erlang mode for Emacs used to indent try...catch
strangely - the first clause following the 'catch' would be indented
with one space less than the following clauses.
If we are to use the new Erlang mode when we add more clauses, they
would be indented with one space less than the preceding clauses.
That would look silly.
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The optimization of a 'case' statement could lead to incorrect
code that would cause an exception at run-time.
Here is an example to show how the optimization went wrong. Start
with the following code:
f({r,#{key:=Val},X}=S) ->
case S of
{r,_,_} ->
setelement(3, Val, S)
end.
(The record operations have already been translated to the
corresponding tuple operations.) The first step in case_opt/3 is
to substitute S to obtain:
f({r,#{key:=Val},X}=S) ->
case {r,#{key:=Val},X} of
{r,_,_} ->
setelement(3, Val, S)
end.
After that substitution the 'case' can be simplified to:
f({r,#{key:=Val},_}=S) ->
case #{key:=Val} of
NewVar ->
setelement(3, Val, S)
end.
That is the result from case_opt/3. Now eval_case/2 notices
that since there is only one clause left in the 'case', the
'case' can eliminated:
f({r,#{key:=Val},_}=S) ->
NewVar = #{key:=Val},
setelement(3, Val, S).
Since the map construction may have a side effect, it was not
eliminated, but assigned to a variable that is never used.
The problem is that '#{key:=Val}' is fine as a pattern, but in a
construction of a new map, the '=>' operator must be used. So the
map construction will fail, generating an exception.
As a conservative correction for a maintenance release, we will
abort the 'case' optimization if the substitution into the 'case'
expression is anything but data items (tuples, conses, or
literals) or variables.
Reported-by: Dmitry Aleksandrov
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* marcus/rabbe-doc-typos/OTP-12399:
fix doc typos found by Rabbe Fogelholm
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* dotsimon/sctp_paddrinfo_state:
Fix inet:getopts involving #sctp_paddrinfo{}
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* nox/http_uri-fragment/OTP-12398:
Properly parse URI fragments
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The ddbe8a821ad commit was embarrassingly broken.
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* dgud/debugger/save-state-mac/OTP-12378:
debugger: Fix debugger save options on mac
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* dgud/wx/connect-when-terminating/OTP-12374:
wx: Do not crash server when going down
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