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A get_map_elements instruction that has a literal map operand
would never be translated to a i_get_map_element instruction.
That would be a problem for the following instruction:
get_map_elements Fail #{} {x,0}, {x,1}
Since the key is not a literal, get_map_element must be used,
since get_map_elements requires that a hash value can be
calculated for each element.
When the instruction is translated to i_get_map_element, the
hash value will be set to 0 and an assertion will trigger in
the debug build.
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A literal negative size in binary construction would cause a crash.
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* bjorn/compiler/misc-fixes:
Teach beam_utils:replace_labels/4 to handle recv_{mark,set}
v3_kernel: Stop ensuring one return value in #k_try{}
v3_kernel_pp: Print return variables for #k_try{}
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It wasn't possible to change group/owner separately, and our test
suite lacked coverage for that.
ERL-589
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* hans/ssh/faster_app_stop/OTP-14988:
ssh: Remove deadlock in supervisor tree
ssh: Remove spawn in ssh_system_sup:stop_system/1
ssh: Removed unused sshc_sup:stop_child/1
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* hans/ssh/cuddle_tests_master:
ssh: Join basic and renegotiation suites and parallelize
ssh: Parallelize ssh_basic_SUITE
ssh: Parallelize ssh_renegotiate_SUITE
ssh: Fix non-working test + add log in test suite
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* maint:
Updated OTP version
Update release notes
ssl: Prepare for release
ssl: Remove duplicate release note
ssl: Fix filter function to not discard AEAD cipher suites
Conflicts:
OTP_VERSION
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make erlang:process_info/1 not retrieve messages
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Fix typos in erl_nif.xml
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Tracing MatchSpec docs update
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I was running this code in shell and expected it to take default `self()` meta tracer,
and start tracing `erlang:put/2`.
```
F = fun F() -> timer:sleep(5000), erlang:get(unique_field), erlang:put(unique_field, 123), F() end.
erlang:trace_pattern({erlang, put, 2}, [{['$1', '_'], [{'==', '$1', unique_field}], []}], [global]).
erlang:trace_pattern({erlang, get, 1}, [{['_'], [], [{trace, [], [call, timestamp]}]}], [meta]).
Pid = spawn(F).
```
But tracing didn't start:
```
6> flush().
Shell got {trace_ts,<0.70.0>,call,
{erlang,get,[unique_field]},
{1521,118606,753838}}
Shell got {trace_ts,<0.70.0>,call,
{erlang,get,[unique_field]},
{1521,118611,754798}}
Shell got {trace_ts,<0.70.0>,call,
{erlang,get,[unique_field]},
{1521,118616,755705}}
ok
7> erlang:trace_info(Pid, flags).
{flags,[]}
```
Turns out that I had false expectations, that `{trace, _, _}` would enable tracing on that process, inheriting meta tracer process as consumer of trace messages.
Instead it tried to take tracer from executing process (which is pointed out in docs). But there was none, so no tracing was started and flags were simply ignored (which is not that obvious from docs).
Updated docs to point out that there are cases when flags would be simply ignored, and no tracing would start.
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* ingela/ssl/filter-bug/OTP-14981:
ssl: Prepare for release
ssl: Remove duplicate release note
ssl: Fix filter function to not discard AEAD cipher suites
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inets: fix scheme validation in http_uri:parse when binary URI
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The missing support for renumbering labels in recv_mark
and recv_set did not seem to cause any problems, probably because
the insructions are introduced late and their labels would keep
their numbers. But it there will definitely be a problem if the
recv_mark and recv_set instructions would be introduced much earlier.
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For unclear reasons, v3_kernel attempts to guarantee that #k_try{}
always has at least one return value, even if it will never be
used. I said "attempts", because the handler block that is executed
when an exception is caught does not have the same guarantee. That
means that if an exception is thrown, the return value will not
actually be set.
In practice, however, this is not a problem for the existing code
generator (v3_codegen). The generated code will still be safe.
If we are to rewrite the code generator to generate an SSA-based
intermediate format, this inconsistency *will* cause problems
when creating phi nodes.
While at it, also remove an unecessary creation of new variables
in generation of #k_try_enter{}.
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Conflicts:
OTP_VERSION
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* ingela/ssl/no-sslv2-hello-support/OTP-14824:
ssl: Remove interoperability option v2_hello_compatible
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Remove low memory need for HiPE on x86_64
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* sverker/send-tick/OTP-14681:
kernel: Fix and improve send_tick logic
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* rickard/dirty-work-gone/OTP-14978:
Reschedule on ordinary scheduler if dirty work is gone
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* rickard/pre-alloc-alignment/OTP-14977:
Force 64-bit alignment for pre-allocators unless x86
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* rickard/remove-approx-started/OTP-14975:
Remove process start time for crash dumps
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* sverker/dict-put-immed-opt:
erts: Optimize erlang:put/2 for hash collision lists
erts: Optimize erlang:put/2 for immed values
erts: Refactor erlang:put/2
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