Simone Bordet created MNG-6239:
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Summary: jansi messes up System.err and System.out
Key: MNG-6239
URL: https://issues.apache.org/jira/browse/MNG-6239
Project: Maven
Issue Type: Bug
Components: core
Affects Versions: 3.5.0
Environment: Java 1.8.0_131, Ubuntu 17.04
Reporter: Simone Bordet
Priority: Blocker
Attachments: mvn-jansi.tgz
I use the Maven Exec Plugin to run a class that asks for interactive input from
the user. This was working in 3.3.9, but does not work in 3.5.0.
Anything printed on {{System.err}} or {{System.out}} without a newline is not
printed immediately on the terminal window.
Example:
{code:java}
BufferedReader console = new BufferedReader(new InputStreamReader(System.in));
System.err.printf("listen port: ");
String value = console.readLine().trim();
{code}
The example above would not print {{listen port:}} on the terminal.
Attached you can find a project that reproduces this issue.
Unpack the project and then run:
{noformat}
$ mvn install && mvn exec:exec
{noformat}
The expected output of the reproducer would be:
{noformat}
err.println
out.println
err.printerr.printfout.printout.printf
{noformat}
instead I get:
{noformat}
err.println
out.println
{noformat}
Removing {{jansi-1.13.jar}} from {{$MAVEN/lib/}} fixes the issue.
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