Running sbt in root of a filesystem leads to index out of bounds exception on startup.

[gfries]

Windows 7 x64
jdk1.7.0_55
scala-2.11.1

D:\>sbt
D:\>set SCRIPT_DIR=D:\scala\sbt-0.13.2\
D:\>java -Xms512M -Xmx1536M -Xss1M -XX:+CMSClassUnloadingEnabled -XX:MaxPermSize=256M -jar "D:\
scala\sbt-0.13.2\sbt-launch.jar"
Getting org.fusesource.jansi jansi 1.11 ...
downloading http://repo1.maven.org/maven2/org/fusesource/jansi/jansi/1.11/jansi-1.11.jar ...
        [SUCCESSFUL ] org.fusesource.jansi#jansi;1.11!jansi.jar (1061ms)
:: retrieving :: org.scala-sbt#boot-jansi
        confs: [default]
        1 artifacts copied, 0 already retrieved (111kB/15ms)
Getting org.scala-sbt sbt 0.13.2 ...
downloading http://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/sbt/0.13.2/jars/sbt.jar ...
        [SUCCESSFUL ] org.scala-sbt#sbt;0.13.2!sbt.jar (1544ms)
downloading http://repo1.maven.org/maven2/org/scala-lang/scala-library/2.10.3/scala-library-2.10.3.jar ...
        [SUCCESSFUL ] org.scala-lang#scala-library;2.10.3!scala-library.jar (30015ms)
downloading http://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/main/0.13.2/jars/main.jar ...
        [SUCCESSFUL ] org.scala-sbt#main;0.13.2!main.jar (9937ms)
downloading http://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/compiler-interface/0.13.2/jars/compiler-interface-bin.jar ...
        [SUCCESSFUL ] org.scala-sbt#compiler-interface;0.13.2!compiler-interface-bin.jar (2090ms)
downloading http://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/compiler-interface/0.13.2/jars/compiler-interface-src.jar ...
        [SUCCESSFUL ] org.scala-sbt#compiler-interface;0.13.2!compiler-interface-src.jar (1061ms)
downloading http://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/precompiled-2_8_2/0.13.2/jars/compiler-interface-bin.jar ...
        [SUCCESSFUL ] org.scala-sbt#precompiled-2_8_2;0.13.2!compiler-interface-bin.jar (2293ms)
downloading http://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/precompiled-2_9_2/0.13.2/jars/compiler-interface-bin.jar ...
        [SUCCESSFUL ] org.scala-sbt#precompiled-2_9_2;0.13.2!compiler-interface-bin.jar (2075ms)
downloading http://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/precompiled-2_9_3/0.13.2/jars/compiler-interface-bin.jar ...
        [SUCCESSFUL ] org.scala-sbt#precompiled-2_9_3;0.13.2!compiler-interface-bin.jar (2262ms)
downloading http://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/actions/0.13.2/jars/actions.jar ...
        [SUCCESSFUL ] org.scala-sbt#actions;0.13.2!actions.jar (3042ms)
downloading http://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/main-settings/0.13.2/jars/main-settings.jar ...
        [SUCCESSFUL ] org.scala-sbt#main-settings;0.13.2!main-settings.jar (4867ms)
downloading http://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/interface/0.13.2/jars/interface.jar ...
        [SUCCESSFUL ] org.scala-sbt#interface;0.13.2!interface.jar (1232ms)
downloading http://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/io/0.13.2/jars/io.jar
...
        [SUCCESSFUL ] org.scala-sbt#io;0.13.2!io.jar (2356ms)
downloading http://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/ivy/0.13.2/jars/ivy.jar ...
        [SUCCESSFUL ] org.scala-sbt#ivy;0.13.2!ivy.jar (4196ms)
downloading http://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/launcher-interface/0.13.2/jars/launcher-interface.jar ...
        [SUCCESSFUL ] org.scala-sbt#launcher-interface;0.13.2!launcher-interface.jar (999ms)
downloading http://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/logging/0.13.2/jars/logging.jar ...
        [SUCCESSFUL ] org.scala-sbt#logging;0.13.2!logging.jar (1529ms)
downloading http://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/process/0.13.2/jars/process.jar ...
        [SUCCESSFUL ] org.scala-sbt#process;0.13.2!process.jar (1591ms)
downloading http://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/run/0.13.2/jars/run.jar ...
        [SUCCESSFUL ] org.scala-sbt#run;0.13.2!run.jar (1685ms)
downloading http://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/command/0.13.2/jars/command.jar ...
        [SUCCESSFUL ] org.scala-sbt#command;0.13.2!command.jar (2932ms)
downloading http://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/classpath/0.13.2/jars/classpath.jar ...
        [SUCCESSFUL ] org.scala-sbt#classpath;0.13.2!classpath.jar (1358ms)
downloading http://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/completion/0.13.2/jars/completion.jar ...
        [SUCCESSFUL ] org.scala-sbt#completion;0.13.2!completion.jar (2792ms)
downloading http://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/api/0.13.2/jars/api.jar ...
        [SUCCESSFUL ] org.scala-sbt#api;0.13.2!api.jar (2496ms)
downloading http://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/compiler-integration/0.13.2/jars/compiler-integration.jar ...
        [SUCCESSFUL ] org.scala-sbt#compiler-integration;0.13.2!compiler-integration.jar (1482ms)
downloading http://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/compiler-ivy-integration/0.13.2/jars/compiler-ivy-integration.jar ...
        [SUCCESSFUL ] org.scala-sbt#compiler-ivy-integration;0.13.2!compiler-ivy-integration.jar (1248ms)
downloading http://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/relation/0.13.2/jars/relation.jar ...
        [SUCCESSFUL ] org.scala-sbt#relation;0.13.2!relation.jar (1139ms)
downloading http://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/task-system/0.13.2/jars/task-system.jar ...
        [SUCCESSFUL ] org.scala-sbt#task-system;0.13.2!task-system.jar (1560ms)
downloading http://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/tasks/0.13.2/jars/tasks.jar ...
        [SUCCESSFUL ] org.scala-sbt#tasks;0.13.2!tasks.jar (1904ms)
downloading http://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/tracking/0.13.2/jars/tracking.jar ...
        [SUCCESSFUL ] org.scala-sbt#tracking;0.13.2!tracking.jar (1419ms)
downloading http://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/testing/0.13.2/jars/testing.jar ...
        [SUCCESSFUL ] org.scala-sbt#testing;0.13.2!testing.jar (1622ms)
downloading http://repo1.maven.org/maven2/org/scala-lang/scala-compiler/2.10.3/scala-compiler-2.10.3.jar ...
        [SUCCESSFUL ] org.scala-lang#scala-compiler;2.10.3!scala-compiler.jar (76721ms)
downloading http://repo1.maven.org/maven2/org/scala-lang/scala-reflect/2.10.3/scala-reflect-2.10.3.jar ...
        [SUCCESSFUL ] org.scala-lang#scala-reflect;2.10.3!scala-reflect.jar (7566ms)
downloading http://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/control/0.13.2/jars/control.jar ...
        [SUCCESSFUL ] org.scala-sbt#control;0.13.2!control.jar (1435ms)
downloading http://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/collections/0.13.2/jars/collections.jar ...
        [SUCCESSFUL ] org.scala-sbt#collections;0.13.2!collections.jar (4540ms)
downloading http://repo1.maven.org/maven2/jline/jline/2.11/jline-2.11.jar ...
        [SUCCESSFUL ] jline#jline;2.11!jline.jar (1763ms)
downloading http://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/incremental-compiler/0.13.2/jars/incremental-compiler.jar ...
        [SUCCESSFUL ] org.scala-sbt#incremental-compiler;0.13.2!incremental-compiler.jar (4134ms)
downloading http://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/compile/0.13.2/jars/compile.jar ...
        [SUCCESSFUL ] org.scala-sbt#compile;0.13.2!compile.jar (1654ms)
downloading http://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/persist/0.13.2/jars/persist.jar ...
        [SUCCESSFUL ] org.scala-sbt#persist;0.13.2!persist.jar (1654ms)
downloading http://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/classfile/0.13.2/jars/classfile.jar ...
        [SUCCESSFUL ] org.scala-sbt#classfile;0.13.2!classfile.jar (1528ms)
downloading http://repo.typesafe.com/typesafe/ivy-releases/org.scala-tools.sbinary/sbinary_2.10/0.4.2/jars/sbinary_2.10.jar ...
        [SUCCESSFUL ] org.scala-tools.sbinary#sbinary_2.10;0.4.2!sbinary_2.10.jar (1529ms)
downloading http://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/cross/0.13.2/jars/cross.jar ...
        [SUCCESSFUL ] org.scala-sbt#cross;0.13.2!cross.jar (999ms)
downloading http://repo1.maven.org/maven2/org/apache/ivy/ivy/2.3.0/ivy-2.3.0.jar ...
        [SUCCESSFUL ] org.apache.ivy#ivy;2.3.0!ivy.jar (3494ms)
downloading http://repo1.maven.org/maven2/com/jcraft/jsch/0.1.46/jsch-0.1.46.jar ...
        [SUCCESSFUL ] com.jcraft#jsch;0.1.46!jsch.jar (1357ms)
downloading http://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/cache/0.13.2/jars/cache.jar ...
        [SUCCESSFUL ] org.scala-sbt#cache;0.13.2!cache.jar (2558ms)
downloading http://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/test-agent/0.13.2/jars/test-agent.jar ...
        [SUCCESSFUL ] org.scala-sbt#test-agent;0.13.2!test-agent.jar (1014ms)
downloading http://repo1.maven.org/maven2/org/scala-sbt/test-interface/1.0/test-interface-1.0.jar ...
        [SUCCESSFUL ] org.scala-sbt#test-interface;1.0!test-interface.jar (687ms)
downloading http://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/apply-macro/0.13.2/jars/apply-macro.jar ...
        [SUCCESSFUL ] org.scala-sbt#apply-macro;0.13.2!apply-macro.jar (2199ms)
:: retrieving :: org.scala-sbt#boot-app
        confs: [default]
        43 artifacts copied, 0 already retrieved (13041kB/156ms)
Getting Scala 2.10.3 (for sbt)...
downloading http://repo1.maven.org/maven2/org/scala-lang/jline/2.10.3/jline-2.10.3.jar ...
        [SUCCESSFUL ] org.scala-lang#jline;2.10.3!jline.jar (1139ms)
downloading http://repo1.maven.org/maven2/org/fusesource/jansi/jansi/1.4/jansi-1.4.jar ...
        [SUCCESSFUL ] org.fusesource.jansi#jansi;1.4!jansi.jar (936ms)
:: retrieving :: org.scala-sbt#boot-scala
        confs: [default]
        5 artifacts copied, 0 already retrieved (24447kB/47ms)
java.lang.StringIndexOutOfBoundsException: String index out of range: 1
        at java.lang.String.substring(Unknown Source)
        at sbt.Project$.normalizeProjectID(Project.scala:179)
        at sbt.Load$.normalizeID$1(Load.scala:443)
        at sbt.Load$.nthParentName$1(Load.scala:448)
        at sbt.Load$.autoID(Load.scala:451)
        at sbt.Load$.loadUnit(Load.scala:430)
        at sbt.Load$$anonfun$15$$anonfun$apply$11.apply(Load.scala:258)
        at sbt.Load$$anonfun$15$$anonfun$apply$11.apply(Load.scala:258)
        at sbt.BuildLoader$$anonfun$componentLoader$1$$anonfun$apply$4$$anonfun$apply$5$$anonfu
n$apply$6.apply(BuildLoader.scala:93)
        at sbt.BuildLoader$$anonfun$componentLoader$1$$anonfun$apply$4$$anonfun$apply$5$$anonfu
n$apply$6.apply(BuildLoader.scala:92)
        at sbt.BuildLoader.apply(BuildLoader.scala:143)
        at sbt.Load$.loadAll(Load.scala:314)
        at sbt.Load$.loadURI(Load.scala:266)
        at sbt.Load$.load(Load.scala:262)
        at sbt.Load$.load(Load.scala:253)
        at sbt.Load$.apply(Load.scala:137)
        at sbt.Load$.defaultLoad(Load.scala:40)
        at sbt.BuiltinCommands$.doLoadProject(Main.scala:458)
        at sbt.BuiltinCommands$$anonfun$loadProjectImpl$2.apply(Main.scala:452)
        at sbt.BuiltinCommands$$anonfun$loadProjectImpl$2.apply(Main.scala:452)
        at sbt.Command$$anonfun$applyEffect$1$$anonfun$apply$2.apply(Command.scala:60)
        at sbt.Command$$anonfun$applyEffect$1$$anonfun$apply$2.apply(Command.scala:60)
        at sbt.Command$$anonfun$applyEffect$2$$anonfun$apply$3.apply(Command.scala:62)
        at sbt.Command$$anonfun$applyEffect$2$$anonfun$apply$3.apply(Command.scala:62)
        at sbt.Command$.process(Command.scala:95)
        at sbt.MainLoop$$anonfun$1$$anonfun$apply$1.apply(MainLoop.scala:100)
        at sbt.MainLoop$$anonfun$1$$anonfun$apply$1.apply(MainLoop.scala:100)
        at sbt.State$$anon$1.process(State.scala:179)
        at sbt.MainLoop$$anonfun$1.apply(MainLoop.scala:100)
        at sbt.MainLoop$$anonfun$1.apply(MainLoop.scala:100)
        at sbt.ErrorHandling$.wideConvert(ErrorHandling.scala:18)
        at sbt.MainLoop$.next(MainLoop.scala:100)
        at sbt.MainLoop$.run(MainLoop.scala:93)
        at sbt.MainLoop$$anonfun$runWithNewLog$1.apply(MainLoop.scala:71)
        at sbt.MainLoop$$anonfun$runWithNewLog$1.apply(MainLoop.scala:66)
        at sbt.Using.apply(Using.scala:25)
        at sbt.MainLoop$.runWithNewLog(MainLoop.scala:66)
        at sbt.MainLoop$.runAndClearLast(MainLoop.scala:49)
        at sbt.MainLoop$.runLoggedLoop(MainLoop.scala:33)
        at sbt.MainLoop$.runLogged(MainLoop.scala:25)
        at sbt.StandardMain$.runManaged(Main.scala:57)
        at sbt.xMain.run(Main.scala:29)
        at xsbt.boot.Launch$$anonfun$run$1.apply(Launch.scala:109)
        at xsbt.boot.Launch$.withContextLoader(Launch.scala:129)
        at xsbt.boot.Launch$.run(Launch.scala:109)
        at xsbt.boot.Launch$$anonfun$apply$1.apply(Launch.scala:36)
        at xsbt.boot.Launch$.launch(Launch.scala:117)
        at xsbt.boot.Launch$.apply(Launch.scala:19)
        at xsbt.boot.Boot$.runImpl(Boot.scala:44)
        at xsbt.boot.Boot$.main(Boot.scala:20)
        at xsbt.boot.Boot.main(Boot.scala)
[error] java.lang.StringIndexOutOfBoundsException: String index out of range: 1

[jsuereth]

Well, it looks like the bug is because you're running in the filesystem root (Something I hadn't seen before).

The issue is that file.getName returns an empty string there, rather than the name of the root, and the "id" method doesn't handle empty strings. If you run in ANY subdirectory, it should work fine. I'm leaving this ticket open as I think we can issue a quick fix for this.