Don't use Java >= 7 Exception constructor

sbt-coursier/src/main/scala-2.10/coursier/ResolutionException.scala

@@ -4,7 +4,9 @@ final class ResolutionException(
   val error: ResolutionError
 ) extends Exception(
   error.message,
-  error.cause.orNull,
-  true,
-  false // don't keep stack trace around (improves readability from the SBT console)
-)
+  error.cause.orNull
+) {
+  // not using the 4-arg Exception constructor, only available with Java >= 7
+
+  setStackTrace(Array()) // don't keep stack trace around (improves readability from the SBT console)
+}

scripts/travis.sh

@@ -110,7 +110,8 @@ testLauncherJava6() {
 }
 
 testSbtCoursierJava6() {
-  sbt ++${SCALA_VERSION} publishLocal
+  sbt ++${SCALA_VERSION} coreJVM/publishLocal cache/publishLocal sbt-coursier/publishLocal
+
   git clone https://github.com/alexarchambault/scalacheck-shapeless.git
   cd scalacheck-shapeless
   cd project
@@ -126,6 +127,23 @@ testSbtCoursierJava6() {
     openjdk:6-jre \
       /bin/bash -c "cd /root/project && /root/bin/sbt update"
   cd ..
+
+  # ensuring resolution error doesn't throw NoSuchMethodError
+  mkdir -p foo/project
+  cd foo
+  echo 'libraryDependencies += "foo" % "bar" % "1.0"' >> build.sbt
+  echo 'addSbtPlugin("io.get-coursier" % "sbt-coursier" % "1.0.0-SNAPSHOT")' >> project/plugins.sbt
+  echo 'sbt.version=0.13.15' >> project/build.properties
+  docker run -it --rm \
+    -v $HOME/.ivy2/local:/root/.ivy2/local \
+    -v $(pwd):/root/project \
+    -v $(pwd)/../bin:/root/bin \
+    -e CI=true \
+    openjdk:6-jre \
+      /bin/bash -c "cd /root/project && /root/bin/sbt update || true" | tee -a output
+  grep "coursier.ResolutionException: Encountered 1 error" output
+  echo "Ok, found ResolutionException in output"
+  cd ..
 }
 
 clean_plugin_sbt() {