Gradle println does not show in TeamCity build log

Hi everyone,

I'm trying to send service messages to TeamCity from a gradle build, but the TeamCity build log does not show the messages gradle sends.

I added this line to the build.gradle file:

println "##teamcity[buildNumber \'${version}\']"

On my Windows PC, when I build, I get this log:

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Evaluating root project 'myproject' using build file 'C:\dev\git\myproject\build.gradle'.
The Task.leftShift(Closure) method has been deprecated and is scheduled to be removed in Gradle 5.0. Please use Task.doLast(Action) instead.
at build_5lsajsa3ggf65v6fydwbv18qj.run(C:\dev\git\myproject\build.gradle:28)
##teamcity[buildNumber '2.3.0-SNAPSHOT']
Uploading C:\dev\git\myproject\build\libs\myproject-2.3.0-SNAPSHOT.jar

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However, on TeamCity I get this build log:

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[18:15:21] : [Step 1/1] Evaluating root project 'myproject' using build file '/buildagent/work/70fa40ddc91a30ad/build.gradle'.
[18:15:21] : [Step 1/1] Compiling build file '/buildagent/work/70fa40ddc91a30ad/build.gradle' using SubsetScriptTransformer.
[18:15:22] : [Step 1/1] Compiling build file '/buildagent/work/70fa40ddc91a30ad/build.gradle' using BuildScriptTransformer.
[18:15:23] : [Step 1/1] The Task.leftShift(Closure) method has been deprecated and is scheduled to be removed in Gradle 5.0. Please use Task.doLast(Action) instead.
[18:15:23] : [Step 1/1] at build_11fef8fnozrqg6dibsa0uzq1k.run(/buildagent/work/70fa40ddc91a30ad/build.gradle:28)[18:15:25] : [Step 1/1] Uploading /buildagent/work/70fa40ddc91a30ad/build/libs/myproject-2.3.0-SNAPSHOT.jar

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We're using TeamCity Enterprise 10.0.3 (build 42434) and gradle wrapper 3.2

Anyone knows why TeamCity ignores Gradle messages?

Any help would be great! thanks, Eyal