Re: [ANN] Clojure 1.9.0-RC1

[Sergey Didenko]

Code with reflection is ~6% faster on server JRE (in 1.9.0-RC1) and ~1%
slower on client JRE.
So apparently it's not a big deal.

Server JRE:

user> *clojure-version*
{:major 1, :minor 8, :incremental 0, :qualifier nil}
user> (use 'criterium.core)
nil
user> (bench (.length (.toString (reduce (fn [sb st] (.append sb st))
(StringBuilder.) (take 10 (repeat "test"))
Reflection warning, *cider-repl scan*:396:54 - call to method append can't
be resolved (target class is unknown).
Reflection warning, *cider-repl scan*:396:23 - reference to field toString
can't be resolved.
Reflection warning, *cider-repl scan*:396:14 - reference to field length
can't be resolved.
Evaluation count : 60 in 60 samples of 1 calls.
 Execution time mean : 1.072324 sec
Execution time std-deviation : 5.929780 ms
   Execution time lower quantile : 1.066123 sec ( 2.5%)
   Execution time upper quantile : 1.087542 sec (97.5%)
   Overhead used : 1.598266 ns

Found 2 outliers in 60 samples (3. %)
low-severe 2 (3. %)
 Variance from outliers : 1.6389 % Variance is slightly inflated by outliers

user> *clojure-version*
{:major 1, :minor 9, :incremental 0, :qualifier "RC1"}
user> (use 'criterium.core)
nil
user> (bench (.length (.toString (reduce (fn [sb st] (.append sb st))
(StringBuilder.) (take 10 (repeat "test"))
Reflection warning, *cider-repl scan*<2>:418:54 - call to method append
can't be resolved (target class is unknown).
Reflection warning, *cider-repl scan*<2>:418:23 - reference to field
toString can't be resolved.
Reflection warning, *cider-repl scan*<2>:418:14 - reference to field length
can't be resolved.
Evaluation count : 60 in 60 samples of 1 calls.
 Execution time mean : 1.017560 sec
Execution time std-deviation : 3.256887 ms
   Execution time lower quantile : 1.015164 sec ( 2.5%)
   Execution time upper quantile : 1.025247 sec (97.5%)
   Overhead used : 1.598209 ns

Found 11 outliers in 60 samples (18. %)
low-severe 7 (11.6667 %)
low-mild 4 (6.6667 %)
 Variance from outliers : 1.6389 % Variance is slightly inflated by outliers



Client JRE:

user> *clojure-version*
{:major 1, :minor 8, :incremental 0, :qualifier nil}
user> (use 'criterium.core)
nil
user> (bench (.length (.toString (reduce (fn [sb st] (.append sb st))
(StringBuilder.) (take 10 (repeat "test"))
Reflection warning, *cider-repl scan*<2>:372:54 - call to method append
can't be resolved (target class is unknown).
Reflection warning, *cider-repl scan*<2>:372:23 - reference to field
toString can't be resolved.
Reflection warning, *cider-repl scan*<2>:372:14 - reference to field length
can't be resolved.
Evaluation count : 60 in 60 samples of 1 calls.
 Execution time mean : 4.468317 sec
Execution time std-deviation : 9.396613 ms
   Execution time lower quantile : 4.460775 sec ( 2.5%)
   Execution time upper quantile : 4.491945 sec (97.5%)
   Overhead used : 8.161463 ns

Found 9 outliers in 60 samples (15. %)
low-severe 6 (10. %)
low-mild 3 (5. %)
 Variance from outliers : 1.6389 % Variance is slightly inflated by outliers

user> *clojure-version*
{:major 1, :minor 9, :incremental 0, :qualifier "RC1"}
user> (use 'criterium.core)
nil
user> (bench (.length (.toString (reduce (fn [sb st] (.append sb st))
(StringBuilder.) (take 10 (repeat "test"))
Reflection warning, *cider-repl scan*:350:54 - call to method append can't
be resolved (target class is unknown).
Reflection warning, *cider-repl scan*:350:23 - reference to field toString
can't be resolved.
Reflection warning, *cider-repl scan*:350:14 - reference to field length
can't be resolved.
Evaluation count : 60 in 60 samples of 1 calls.
 Execution time mean : 4.504926 sec
Execution time std-deviation : 10.412995 ms
   Execution time lower quantile : 4.488528 sec ( 2.5%)
   Execution time upper quantile : 4.532106 sec (97.5%)
   Overhead used : 8.425136 ns

Found 3 outliers in 60 samples (5. %)
low-severe 3 (5. %)
 Variance from outliers : 1.6389 % Variance is slightly inflated by outliers


On Fri, Nov 24, 2017 at 4:05 AM, Alex Miller  wrote:

> So is there any difference in this code between 1.8 and 1.9?
>
> On Nov 23, 2017, at 5:31 PM, Sergey Didenko 
> wrote:
>
> Correction - it's not about regex parsing. I removed reflection calls for
> StringBuilder and now it seems to be on par in speed.
>
> On Fri, Nov 24, 2017 at 1:20 AM, Sergey Didenko 
> wrote:
>
>> Hi,
>>
>> is it expected that code which does a lot of regex parsing is ~14% slower
>> than it was under Clojure 1.8?
>>
>> On Tue, Nov 14, 2017 at 8:22 AM, Shantanu Kumar > > wrote:
>>
>>> Sorry, my bad. I can see the same behavior in previous Clojure versions
>>> too. I discovered this in the middle of moving to 1.9.0-RC1 in one of

Re: [ANN] Clojure 1.9.0-RC1

[Sergey Didenko]

Correction - it's not about regex parsing. I removed reflection calls for
StringBuilder and now it seems to be on par in speed.

On Fri, Nov 24, 2017 at 1:20 AM, Sergey Didenko 
wrote:

> Hi,
>
> is it expected that code which does a lot of regex parsing is ~14% slower
> than it was under Clojure 1.8?
>
> On Tue, Nov 14, 2017 at 8:22 AM, Shantanu Kumar 
> wrote:
>
>> Sorry, my bad. I can see the same behavior in previous Clojure versions
>> too. I discovered this in the middle of moving to 1.9.0-RC1 in one of
>> the projects and somehow got it all mixed up.
>>
>>
>> Shantanu
>>
>> On Tuesday, 14 November 2017 11:36:30 UTC+5:30, Andy Fingerhut wrote:
>>>
>>> I see the same behavior in Clojure 1.7.0 and 1.8.0 as you see in
>>> 1.9.0-RC1.
>>>
>>> Andy
>>>
>>> On Mon, Nov 13, 2017 at 9:48 PM, Shantanu Kumar 
>>> wrote:
>>>
 Sorry, I did not specify the problem completely earlier. The coercion
 fails only when *uncheked-math* is set to truthy in 1.9.0-RC1.

 user=> (byte \a)
 97
 user=> (set! *unchecked-math* true)  ; or :warn-on-boxed
 true
 user=> (byte \a)

 ClassCastException java.lang.Character cannot be cast to
 java.lang.Number  clojure.lang.RT.uncheckedByteCast (RT.java:1376)


 Shantanu

 On Tuesday, 14 November 2017 01:27:36 UTC+5:30, Alex Miller wrote:
>
> Works for me in 1.9.0-RC1. I don't know of anything that changed in
> this area.
>
> Clojure 1.9.0-RC1
> user=> (byte \a)
> 97
>
> On Mon, Nov 13, 2017 at 1:09 PM, Shantanu Kumar 
> wrote:
>
>> The coercion (byte \a) works fine in Clojure 1.8, but it fails with
>> `ClassCastException java.lang.Character cannot be cast to 
>> java.lang.Number`
>> in 1.9.0-RC1. Is this by design?
>>
>>
>> Shantanu
>>
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Re: [ANN] Clojure 1.9.0-RC1

[Sergey Didenko]

Hi,

is it expected that code which does a lot of regex parsing is ~14% slower
than it was under Clojure 1.8?

On Tue, Nov 14, 2017 at 8:22 AM, Shantanu Kumar 
wrote:

> Sorry, my bad. I can see the same behavior in previous Clojure versions
> too. I discovered this in the middle of moving to 1.9.0-RC1 in one of
> the projects and somehow got it all mixed up.
>
>
> Shantanu
>
> On Tuesday, 14 November 2017 11:36:30 UTC+5:30, Andy Fingerhut wrote:
>>
>> I see the same behavior in Clojure 1.7.0 and 1.8.0 as you see in
>> 1.9.0-RC1.
>>
>> Andy
>>
>> On Mon, Nov 13, 2017 at 9:48 PM, Shantanu Kumar 
>> wrote:
>>
>>> Sorry, I did not specify the problem completely earlier. The coercion
>>> fails only when *uncheked-math* is set to truthy in 1.9.0-RC1.
>>>
>>> user=> (byte \a)
>>> 97
>>> user=> (set! *unchecked-math* true)  ; or :warn-on-boxed
>>> true
>>> user=> (byte \a)
>>>
>>> ClassCastException java.lang.Character cannot be cast to
>>> java.lang.Number  clojure.lang.RT.uncheckedByteCast (RT.java:1376)
>>>
>>>
>>> Shantanu
>>>
>>> On Tuesday, 14 November 2017 01:27:36 UTC+5:30, Alex Miller wrote:

 Works for me in 1.9.0-RC1. I don't know of anything that changed in
 this area.

 Clojure 1.9.0-RC1
 user=> (byte \a)
 97

 On Mon, Nov 13, 2017 at 1:09 PM, Shantanu Kumar 
 wrote:

> The coercion (byte \a) works fine in Clojure 1.8, but it fails with
> `ClassCastException java.lang.Character cannot be cast to 
> java.lang.Number`
> in 1.9.0-RC1. Is this by design?
>
>
> Shantanu
>
> --
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Re: [ANN] Clojure 1.9.0-RC1

[Shantanu Kumar]

Sorry, my bad. I can see the same behavior in previous Clojure versions 
too. I discovered this in the middle of moving to 1.9.0-RC1 in one of 
the projects and somehow got it all mixed up.


Shantanu

On Tuesday, 14 November 2017 11:36:30 UTC+5:30, Andy Fingerhut wrote:
>
> I see the same behavior in Clojure 1.7.0 and 1.8.0 as you see in 1.9.0-RC1.
>
> Andy
>
> On Mon, Nov 13, 2017 at 9:48 PM, Shantanu Kumar  > wrote:
>
>> Sorry, I did not specify the problem completely earlier. The coercion 
>> fails only when *uncheked-math* is set to truthy in 1.9.0-RC1.
>>
>> user=> (byte \a)
>> 97
>> user=> (set! *unchecked-math* true)  ; or :warn-on-boxed
>> true
>> user=> (byte \a)
>>
>> ClassCastException java.lang.Character cannot be cast to 
>> java.lang.Number  clojure.lang.RT.uncheckedByteCast (RT.java:1376)
>>
>>
>> Shantanu
>>
>> On Tuesday, 14 November 2017 01:27:36 UTC+5:30, Alex Miller wrote:
>>>
>>> Works for me in 1.9.0-RC1. I don't know of anything that changed in this 
>>> area.
>>>
>>> Clojure 1.9.0-RC1
>>> user=> (byte \a)
>>> 97
>>>
>>> On Mon, Nov 13, 2017 at 1:09 PM, Shantanu Kumar  
>>> wrote:
>>>
 The coercion (byte \a) works fine in Clojure 1.8, but it fails with 
 `ClassCastException java.lang.Character cannot be cast to 
 java.lang.Number` 
 in 1.9.0-RC1. Is this by design?


 Shantanu

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Re: [ANN] Clojure 1.9.0-RC1

[Andy Fingerhut]

I see the same behavior in Clojure 1.7.0 and 1.8.0 as you see in 1.9.0-RC1.

Andy

On Mon, Nov 13, 2017 at 9:48 PM, Shantanu Kumar 
wrote:

> Sorry, I did not specify the problem completely earlier. The coercion
> fails only when *uncheked-math* is set to truthy in 1.9.0-RC1.
>
> user=> (byte \a)
> 97
> user=> (set! *unchecked-math* true)  ; or :warn-on-boxed
> true
> user=> (byte \a)
>
> ClassCastException java.lang.Character cannot be cast to java.lang.Number
> clojure.lang.RT.uncheckedByteCast (RT.java:1376)
>
>
> Shantanu
>
> On Tuesday, 14 November 2017 01:27:36 UTC+5:30, Alex Miller wrote:
>>
>> Works for me in 1.9.0-RC1. I don't know of anything that changed in this
>> area.
>>
>> Clojure 1.9.0-RC1
>> user=> (byte \a)
>> 97
>>
>> On Mon, Nov 13, 2017 at 1:09 PM, Shantanu Kumar 
>> wrote:
>>
>>> The coercion (byte \a) works fine in Clojure 1.8, but it fails with
>>> `ClassCastException java.lang.Character cannot be cast to java.lang.Number`
>>> in 1.9.0-RC1. Is this by design?
>>>
>>>
>>> Shantanu
>>>
>>> --
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Re: [ANN] Clojure 1.9.0-RC1

[Shantanu Kumar]

Sorry, I did not specify the problem completely earlier. The coercion fails 
only when *uncheked-math* is set to truthy in 1.9.0-RC1.

user=> (byte \a)
97
user=> (set! *unchecked-math* true)  ; or :warn-on-boxed
true
user=> (byte \a)

ClassCastException java.lang.Character cannot be cast to java.lang.Number  
clojure.lang.RT.uncheckedByteCast (RT.java:1376)


Shantanu

On Tuesday, 14 November 2017 01:27:36 UTC+5:30, Alex Miller wrote:
>
> Works for me in 1.9.0-RC1. I don't know of anything that changed in this 
> area.
>
> Clojure 1.9.0-RC1
> user=> (byte \a)
> 97
>
> On Mon, Nov 13, 2017 at 1:09 PM, Shantanu Kumar  > wrote:
>
>> The coercion (byte \a) works fine in Clojure 1.8, but it fails with 
>> `ClassCastException java.lang.Character cannot be cast to java.lang.Number` 
>> in 1.9.0-RC1. Is this by design?
>>
>>
>> Shantanu
>>
>>

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Re: [ANN] Clojure 1.9.0-RC1

[Alex Miller]

Works for me in 1.9.0-RC1. I don't know of anything that changed in this
area.

Clojure 1.9.0-RC1
user=> (byte \a)
97

On Mon, Nov 13, 2017 at 1:09 PM, Shantanu Kumar 
wrote:

> The coercion (byte \a) works fine in Clojure 1.8, but it fails with
> `ClassCastException java.lang.Character cannot be cast to java.lang.Number`
> in 1.9.0-RC1. Is this by design?
>
>
> Shantanu
>
>

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Re: [ANN] Clojure 1.9.0-RC1

[Shantanu Kumar]

The coercion (byte \a) works fine in Clojure 1.8, but it fails with 
`ClassCastException java.lang.Character cannot be cast to java.lang.Number` 
in 1.9.0-RC1. Is this by design?


Shantanu

On Monday, 13 November 2017 07:32:00 UTC+5:30, Alex Miller wrote:
>
> Hi David, 
>
> Clojure 1.9 now depends on two external dependencies (spec.alpha and 
> core.specs.alpha) so the instructions listed there will no longer work. We 
> are evaluating whether and how to update those instructions in the readme 
> right now.
>
> Most Clojure users work with Clojure through a project manager like 
> Leiningen or Boot (where simply declaring a dependency on 
> org.clojure/clojure "1.9.0-RC1" will automatically pull in its new 
> dependencies). We also have a new command line tool, `clj` that you can use 
> to start a repl with 1.9 (see https://clojure.org/guides/deps_and_cli).
>
> Alex
>
>
>
> On Sunday, November 12, 2017 at 7:51:26 PM UTC-6, David Kinzer wrote:
>>
>> I'm getting an error when I follow the instructions in the readme.txt, am 
>> I missing something?
>>
>> java -cp clojure-1.9.0-RC1.jar clojure.main
>> Exception in thread "main" java.lang.ExceptionInInitializerError
>> at java.base/java.lang.Class.forName0(Native Method)
>> at java.base/java.lang.Class.forName(Class.java:375)
>>
>> same instructions work for 1.8, though
>>
>>
>

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Re: [ANN] Clojure 1.9.0-RC1

[Alex Miller]

Hi David, 

Clojure 1.9 now depends on two external dependencies (spec.alpha and 
core.specs.alpha) so the instructions listed there will no longer work. We 
are evaluating whether and how to update those instructions in the readme 
right now.

Most Clojure users work with Clojure through a project manager like 
Leiningen or Boot (where simply declaring a dependency on 
org.clojure/clojure "1.9.0-RC1" will automatically pull in its new 
dependencies). We also have a new command line tool, `clj` that you can use 
to start a repl with 1.9 (see https://clojure.org/guides/deps_and_cli).

Alex



On Sunday, November 12, 2017 at 7:51:26 PM UTC-6, David Kinzer wrote:
>
> I'm getting an error when I follow the instructions in the readme.txt, am 
> I missing something?
>
> java -cp clojure-1.9.0-RC1.jar clojure.main
> Exception in thread "main" java.lang.ExceptionInInitializerError
> at java.base/java.lang.Class.forName0(Native Method)
> at java.base/java.lang.Class.forName(Class.java:375)
>
> same instructions work for 1.8, though
>
>

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Re: [ANN] Clojure 1.9.0-RC1

[David Kinzer]

I'm getting an error when I follow the instructions in the readme.txt, am I 
missing something?

java -cp clojure-1.9.0-RC1.jar clojure.main
Exception in thread "main" java.lang.ExceptionInInitializerError
at java.base/java.lang.Class.forName0(Native Method)
at java.base/java.lang.Class.forName(Class.java:375)

same instructions work for 1.8, though

On Tuesday, November 7, 2017 at 9:58:24 AM UTC-5, Alex Miller wrote:
>
> Clojure 1.9.0-RC1 is now available.
>
> Try it via
>
> - Download: https://repo1.maven.org/maven2/org/clojure/clojure/1.9.0-RC1
> - Leiningen: [org.clojure/clojure "1.9.0-RC1"]
>
> 1.9.0-RC1 is the same as 1.9.0-beta4.
>
> We would appreciate anything you can do to try out this release. We do not 
> plan to make any further changes prior to 1.9.0 release unless regressions 
> are found.
>

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Re: [ANN] Clojure 1.9.0-RC1

[Alex Miller]

Clojure 1.9 (and 1.8, and every other prior version of Clojure!) works with 
Java 9 due to the care that Java takes in retaining backward compatibility. 
Clojure 1.0 works just fine with Java 9.

However, there have been some changes that affect various tools, most 
prominently Leiningen and Boot. Leiningen has for a long time put the 
Clojure jar on the bootclasspath to make startup a little faster. Due to 
the new classloader and base module constraints, this doesn't work in Java 
9 due to the use of a class outside the Java base module in core. In 
Clojure 1.9.0-beta1 we started lazy loading the code using the problematic 
class to sidestep this specific case. Also, Leiningen has made changes such 
that there is more flexibility in whether you put Clojure on the 
bootclasspath. Depending which version of lein and Clojure you are using, 
you may see this issue. I'd recommend using the latest version of both lein 
and Clojure to avoid it.

There have also been changes in the standard classloader hierarchy in Java 
9 that affect some of the dynamic classloader libraries (like dynapath, 
used by Leiningen and Boot). Those issues have been addressed but if you 
have an older version of any of those you can encounter those problems.

There is a known issue related to the new module system in JDK9 and how 
Clojure chooses a method in a reflective call, in particular the Reflector 
may choose to invoke a module-private method of an implementation rather 
than the visible interface method. This violates the module system's 
constraints and throws an IllegalAccessException (see CLJ-2066). This will 
not be addressed in Clojure 1.9, but is easily worked around by type 
hinting the call target to avoid reflection. I expect this will be 
addressed in the next release; the changes are significant enough that it 
seemed too risky (for all other reflective calls) to change right before 
the release.


On Friday, November 10, 2017 at 12:48:01 PM UTC-6, Didier wrote:
>
> Is Clojure 1.9 expected to support JDK9? Or is that support reserved for a 
> later version?
>

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Re: [ANN] Clojure 1.9.0-RC1

[Didier]

Is Clojure 1.9 expected to support JDK9? Or is that support reserved for a 
later version?

On Friday, 10 November 2017 10:08:35 UTC-8, Beau Fabry wrote:
>
> We've switched both of our main projects to RC1 and have had no issues yet.
>
> On Thursday, November 9, 2017 at 11:49:07 PM UTC-8, Sean Corfield wrote:
>>
>> We have three processes running RC1 in production as of today. Looks good 
>> so far. We’ve had everything else up and running on Beta 4 in production 
>> since Monday, also looking good.
>>
>>  
>>
>> Sean Corfield -- (970) FOR-SEAN -- (904) 302-SEAN
>> An Architect's View -- http://corfield.org/
>>
>> "If you're not annoying somebody, you're not really alive."
>> -- Margaret Atwood
>>
>>  
>> --
>> *From:* clo...@googlegroups.com  on behalf of 
>> Alex Miller 
>> *Sent:* Tuesday, November 7, 2017 6:58:24 AM
>> *To:* Clojure
>> *Subject:* [ANN] Clojure 1.9.0-RC1 
>>  
>> Clojure 1.9.0-RC1 is now available.
>>
>> Try it via
>>
>> - Download: https://repo1.maven.org/maven2/org/clojure/clojure/1.9.0-RC1
>> - Leiningen: [org.clojure/clojure "1.9.0-RC1"]
>>
>> 1.9.0-RC1 is the same as 1.9.0-beta4.
>>
>> We would appreciate anything you can do to try out this release. We do 
>> not plan to make any further changes prior to 1.9.0 release unless 
>> regressions are found.
>>
>> -- 
>> You received this message because you are subscribed to the Google
>> Groups "Clojure" group.
>> To post to this group, send email to clo...@googlegroups.com
>> Note that posts from new members are moderated - please be patient with 
>> your first post.
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>> http://groups.google.com/group/clojure?hl=en
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>>
>

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Re: [ANN] Clojure 1.9.0-RC1

[Beau Fabry]

We've switched both of our main projects to RC1 and have had no issues yet.

On Thursday, November 9, 2017 at 11:49:07 PM UTC-8, Sean Corfield wrote:
>
> We have three processes running RC1 in production as of today. Looks good 
> so far. We’ve had everything else up and running on Beta 4 in production 
> since Monday, also looking good.
>
>  
>
> Sean Corfield -- (970) FOR-SEAN -- (904) 302-SEAN
> An Architect's View -- http://corfield.org/
>
> "If you're not annoying somebody, you're not really alive."
> -- Margaret Atwood
>
>  
> --
> *From:* clo...@googlegroups.com   > on behalf of Alex Miller  >
> *Sent:* Tuesday, November 7, 2017 6:58:24 AM
> *To:* Clojure
> *Subject:* [ANN] Clojure 1.9.0-RC1 
>  
> Clojure 1.9.0-RC1 is now available.
>
> Try it via
>
> - Download: https://repo1.maven.org/maven2/org/clojure/clojure/1.9.0-RC1
> - Leiningen: [org.clojure/clojure "1.9.0-RC1"]
>
> 1.9.0-RC1 is the same as 1.9.0-beta4.
>
> We would appreciate anything you can do to try out this release. We do not 
> plan to make any further changes prior to 1.9.0 release unless regressions 
> are found.
>
> -- 
> You received this message because you are subscribed to the Google
> Groups "Clojure" group.
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> Note that posts from new members are moderated - please be patient with 
> your first post.
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RE: [ANN] Clojure 1.9.0-RC1

[Sean Corfield]

We have three processes running RC1 in production as of today. Looks good so 
far. We’ve had everything else up and running on Beta 4 in production since 
Monday, also looking good.

Sean Corfield -- (970) FOR-SEAN -- (904) 302-SEAN
An Architect's View -- http://corfield.org/

"If you're not annoying somebody, you're not really alive."
-- Margaret Atwood


From: clojure@googlegroups.com  on behalf of Alex 
Miller 
Sent: Tuesday, November 7, 2017 6:58:24 AM
To: Clojure
Subject: [ANN] Clojure 1.9.0-RC1

Clojure 1.9.0-RC1 is now available.

Try it via

- Download: https://repo1.maven.org/maven2/org/clojure/clojure/1.9.0-RC1
- Leiningen: [org.clojure/clojure "1.9.0-RC1"]

1.9.0-RC1 is the same as 1.9.0-beta4.

We would appreciate anything you can do to try out this release. We do not plan 
to make any further changes prior to 1.9.0 release unless regressions are found.

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Re: [ANN] Clojure 1.9.0-RC1

[Alex Miller]

Thanks, that’s good to hear.

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Re: [ANN] Clojure 1.9.0-RC1

[Rick Moynihan]

One more data point.

I haven't uncovered any regressions yet on beta4 & have upgraded a few
libraries and apps; though none are in production yet I've been working
with it more or less daily since the beta4 release.

R.

On 7 November 2017 at 14:58, Alex Miller  wrote:

> Clojure 1.9.0-RC1 is now available.
>
> Try it via
>
> - Download: https://repo1.maven.org/maven2/org/clojure/clojure/1.9.0-RC1
> - Leiningen: [org.clojure/clojure "1.9.0-RC1"]
>
> 1.9.0-RC1 is the same as 1.9.0-beta4.
>
> We would appreciate anything you can do to try out this release. We do not
> plan to make any further changes prior to 1.9.0 release unless regressions
> are found.
>
> --
> You received this message because you are subscribed to the Google
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