Note that the above links are now dead because the VM crashed (OOME?) just moments after I noticed this problem.

Reproducible in other jobs. Seems that there is a fixed prefix which is dumped before any Ant target:

 esc   [   8   m   h   a   :   A   A   A   A   Y   B   +   L   C
   A   A   A   A   A   A   A   A   A   B   b   8   5   a   B   t
   b   i   I   Q   T   6   j   N   K   U   4   P   0   +   v   J
   L   E   4   u   1   g   v   P   j   G   v   R   M   8   x   r
   y   Q   k   s   S   g   9   t   c   Q   v   v   y   T   V   v
   q   N   r   /   s   +   V   l   9   u   Y   G   B   g   q   i
   h   i   k   o   K   q   T   8   /   O   K   8   3   N   S   9
   Z   w   h   N   E   g   h   A   w   Q   w   g   h   Q   W   A
   A   D   R   O   O   u   m   X   Q   A   A   A   A   =   = esc
   [   0   m

which resembles a VT-102 control sequence.

ConsoleNote is responsible, I guess.

Junk also appears before first Ant target name in /console, e.g.:

Skipping 11,901 KB.. Full Log

tcQvv...DROOumXQAAAA==[0mbasic-init:

-release.dir: 

yesterday I opened a similiar - maybe duplicate - issue: HUDSON-6120

Code changed in hudson
User: : kohsuke
Path:
trunk/hudson/main/core/src/main/java/hudson/model/Run.java
trunk/hudson/main/test/src/test/java/hudson/console/ConsoleAnnotatorTest.java
trunk/www/changelog.html
http://hudson-ci.org/commit/29653
Log:
[FIXED HUDSON-6034] in 1.354.

1.354 gives his issue as fixed, but I'm still getting the same garbage string in the ant target lines:

[8mha:AAAAYB+LCAAAAAAAAABb85aBtbiIQT6jNKU4P0+vJLE4u1gvPjGvRM8xryQksSg9tcQvvyTVvqNr/s+Vl9uYGBgqihikoKqT8/OK83NS9ZwhNEghAwQwghQWAADROOumXQAAAA==[0mbootstrap-libs.init:

Indeed this is not fixed in 1.354, e.g.

http://deadlock.netbeans.org/hudson/job/ruby/3483/consoleText

...
all-api.visual:
Building api.visual...

[8mha:AAAAYB+LCAA.....mXQAAAA==[0mapi.visual.default.init:
Updating property file: /hudson/workdir/jobs/ruby/workspace/nbbuild/netbeans/moduleCluster.properties
...

yes, I can confirm that also. garbage still existing.

Still present in 1.355...

Hi All,

I too had same issue with 1.362 version. I am not sure weather it is right fix or not but I could able to fix it by changing the code listed below in Run.java file. See the code change below if it helps to you.

In Run.java class method changed is doConsoleText(StaplerRequest req, StaplerResponse rsp)

Comment below lines:

// Prevent jelly from flushing stream so Content-Length header can be added afterwards
FlushProofOutputStream out = new FlushProofOutputStream(rsp.getCompressedOutputStream(req));
getLogText().writeLogTo(0,out);
out.close();

***********************************************
Then add below lines:

Writer w = rsp.getCompressedWriter(req);
getLogText().writeHtmlTo(0,w);
w.close();

************************************************

Code changed in hudson
User: : kohsuke
Path:
trunk/hudson/main/core/src/main/java/hudson/console/AnnotatedLargeText.java
trunk/hudson/main/core/src/main/java/hudson/console/ConsoleNote.java
trunk/hudson/main/core/src/main/java/hudson/console/PlainTextConsoleOutputStream.java
trunk/hudson/main/core/src/main/java/hudson/util/UnbufferedBase64InputStream.java
trunk/hudson/main/test/src/test/java/hudson/console/ConsoleAnnotatorTest.java
trunk/www/changelog.html
http://hudson-ci.org/commit/32514
Log:
[FIXED HUDSON-6034] plain text console output needs to filter out inline console annotations