diff --git a/doc/04-schema.md b/doc/04-schema.md
index d36e90eaf..393020777 100644
--- a/doc/04-schema.md
+++ b/doc/04-schema.md
@@ -308,7 +308,9 @@ releases for the `doctrine/data-fixtures` package :
 `require` and `require-dev` additionally support explicit references (i.e.
 commit) for dev versions to make sure they are locked to a given state, even
 when you run update. These only work if you explicitly require a dev version
-and append the reference with `#<ref>`.
+and append the reference with `#<ref>`. This is also a
+[root-only](04-schema.md#root-package) feature and will be ignored in
+dependencies.
 
 Example:
 
diff --git a/src/Composer/Command/ShowCommand.php b/src/Composer/Command/ShowCommand.php
index ae2307e5c..ec0261acc 100644
--- a/src/Composer/Command/ShowCommand.php
+++ b/src/Composer/Command/ShowCommand.php
@@ -467,7 +467,7 @@ EOT
                     }
                     $io->write('');
                     if (isset($package['warning'])) {
-                        $io->write('<warning>' . $package['warning'] . '</warning>');
+                        $io->writeError('<warning>' . $package['warning'] . '</warning>');
                     }
                 }
 
diff --git a/src/Composer/EventDispatcher/EventDispatcher.php b/src/Composer/EventDispatcher/EventDispatcher.php
index 4a5656d9f..2a180614c 100644
--- a/src/Composer/EventDispatcher/EventDispatcher.php
+++ b/src/Composer/EventDispatcher/EventDispatcher.php
@@ -186,7 +186,12 @@ class EventDispatcher
                         $this->io->writeError(sprintf('<warning>You made a reference to a non-existent script %s</warning>', $callable), true, IOInterface::QUIET);
                     }
 
-                    $return = $this->dispatch($scriptName, new Script\Event($scriptName, $event->getComposer(), $event->getIO(), $event->isDevMode(), $args, $flags));
+                    try {
+                        $return = $this->dispatch($scriptName, new Script\Event($scriptName, $event->getComposer(), $event->getIO(), $event->isDevMode(), $args, $flags));
+                    } catch (ScriptExecutionException $e) {
+                        $this->io->writeError(sprintf('<error>Script %s was called via %s</error>', $callable, $event->getName()), true, IOInterface::QUIET);
+                        throw $e;
+                    }
                 }
             } elseif ($this->isPhpScript($callable)) {
                 $className = substr($callable, 0, strpos($callable, '::'));