FULL PRODUCT VERSION :
jshell> Bobs-MacBook-Pro:bin bob$ ./java -version
java version "9-ea"
Java(TM) SE Runtime Environment (build 9-ea+116)
Java HotSpot(TM) 64-Bit Server VM (build 9-ea+116, mixed mode)
Bobs-MacBook-Pro:b

FULL OS VERSION :
Bobs-MacBook-Pro:bin bob$ uname -a
Darwin Bobs-MacBook-Pro.local 15.4.0 Darwin Kernel Version 15.4.0: Fri Feb 26 22:08:05 PST 2016; root:xnu-3248.40.184~3/RELEASE_X86_64 x86_64
Bobs-MacBook-Pro:bin bo

EXTRA RELEVANT SYSTEM CONFIGURATION :
OSX El Capitan, all current patches.

A DESCRIPTION OF THE PROBLEM :
The (syntax error) command: System.out.println("%5d", 10); causes jshell to exit.
The command: System.out.println("hello"); leaves jsheell running.


THE PROBLEM WAS REPRODUCIBLE WITH -Xint FLAG: Did not try

THE PROBLEM WAS REPRODUCIBLE WITH -server FLAG: Did not try

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Start jshell.
Enter the command: System.out.println("%5d", 10);


EXPECTED VERSUS ACTUAL BEHAVIOR :
Expected: Should give an error message but continue.
Actual: gives error message, then stacktrace and jshell quits.
ERROR MESSAGES/STACK TRACES THAT OCCUR :
Bobs-MacBook-Pro:~ bob$ cd /Library/Java/JavaVirtualMachines/jdk-9.jdk/Contents/Home/bin
Bobs-MacBook-Pro:bin bob$ ./jshell
| Welcome to JShell -- Version 9-ea
| For an introduction type: /help intro


jshell> System.out.println("%5d", 10);
| Error:
| no suitable method found for println(java.lang.String,int)
| method java.io.PrintStream.println() is not applicable
| (actual and formal argument lists differ in length)
| method java.io.PrintStream.println(boolean) is not applicable
| (actual and formal argument lists differ in length)
| method java.io.PrintStream.println(char) is not applicable
| (actual and formal argument lists differ in length)
| method java.io.PrintStream.println(int) is not applicable
| (actual and formal argument lists differ in length)
| method java.io.PrintStream.println(long) is not applicable
| (actual and formal argument lists differ in length)
| method java.io.PrintStream.println(float) is not applicable
| (actual and formal argument lists differ in length)
| method java.io.PrintStream.println(double) is not applicable
| (actual and formal argument lists differ in length)
| method java.io.PrintStream.println(char[]) is not applicable
| (actual and formal argument lists differ in length)
| method java.io.PrintStream.println(java.lang.String) is not applicable
| (actual and formal argument lists differ in length)
| method java.io.PrintStream.println(java.lang.Object) is not applicable
| (actual and formal argument lists differ in length)
| System.out.println("Exception in thread "main" java.util.MissingFormatArgumentException: Format specifier '%5d'
at java.util.Formatter.format(java.base@9-ea/Formatter.java:2524)
at java.io.PrintStream.format(java.base@9-ea/PrintStream.java:974)
at java.io.PrintStream.printf(java.base@9-ea/PrintStream.java:873)
at jdk.internal.jshell.tool.JShellTool.rawout(jdk.jshell@9-ea/JShellTool.java:230)
at jdk.internal.jshell.tool.JShellTool.hard(jdk.jshell@9-ea/JShellTool.java:240)
at jdk.internal.jshell.tool.JShellTool.lambda$handleEvent$70(jdk.jshell@9-ea/JShellTool.java:1832)
at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(java.base@9-ea/ArrayList.java:1477)
at java.util.stream.ReferencePipeline$Head.forEach(java.base@9-ea/ReferencePipeline.java:591)
at jdk.internal.jshell.tool.JShellTool.handleEvent(jdk.jshell@9-ea/JShellTool.java:1832)
at jdk.internal.jshell.tool.JShellTool.processCompleteSource(jdk.jshell@9-ea/JShellTool.java:1799)
at jdk.internal.jshell.tool.JShellTool.processSource(jdk.jshell@9-ea/JShellTool.java:1784)
at jdk.internal.jshell.tool.JShellTool.processSourceCatchingReset(jdk.jshell@9-ea/JShellTool.java:686)
at jdk.internal.jshell.tool.JShellTool.run(jdk.jshell@9-ea/JShellTool.java:666)
at jdk.internal.jshell.tool.JShellTool.start(jdk.jshell@9-ea/JShellTool.java:473)
at jdk.internal.jshell.tool.JShellTool.start(jdk.jshell@9-ea/JShellTool.java:447)
at jdk.internal.jshell.tool.JShellTool.main(jdk.jshell@9-ea/JShellTool.java:437)
Bobs-MacBook-Pro:bin bob$ ./jshell
| Welcome to JShell -- Version 9-ea
| For an introduction type: /help intro


jshell> System.out.println("hello");
hello

jshell>


REPRODUCIBILITY :
This bug can be reproduced always.