fixing error message for higher repository priority, when higher repo has only a dev-branch

src/Composer/DependencyResolver/Problem.php

@@ -279,11 +279,11 @@ class Problem
             return array("- Root composer.json requires $packageName".self::constraintToText($constraint) . ', ', 'found '.self::getPackageList($packages, $isVerbose).' but '.(self::hasMultipleNames($packages) ? 'these do' : 'it does').' not match your minimum-stability.');
         }
 
-        // check if the package is found when bypassing the constraint check
-        if ($packages = $repositorySet->findPackages($packageName, null)) {
+        // check if the package is found when bypassing the constraint check and stability checks
+        if ($packages = $repositorySet->findPackages($packageName, null, RepositorySet::ALLOW_UNACCEPTABLE_STABILITIES)) {
             // we must first verify if a valid package would be found in a lower priority repository
             if ($allReposPackages = $repositorySet->findPackages($packageName, $constraint, RepositorySet::ALLOW_SHADOWED_REPOSITORIES)) {
-                $higherRepoPackages = $repositorySet->findPackages($packageName, null);
+                $higherRepoPackages = $repositorySet->findPackages($packageName, null, RepositorySet::ALLOW_UNACCEPTABLE_STABILITIES);
                 $nextRepoPackages = array();
                 $nextRepo = null;
 

src/Composer/Repository/RepositorySet.php

@@ -193,7 +193,7 @@ class RepositorySet
             }
         }
 
-        return $candidates;
+        return $result;
     }
 
     public function getProviders($packageName)

tests/Composer/Test/Fixtures/installer/repositories-priorities4.test

@@ -0,0 +1,50 @@
+--TEST--
+Packages found in a higher priority repository won't be considered as found if version does not match
+--COMPOSER--
+{
+    "repositories": [
+        {
+            "type": "package",
+            "package": [
+                {
+                    "name": "ruflin/elastica",
+                    "version": "dev-outdated-branch"
+                }
+            ]
+        },
+        {
+            "type": "package",
+            "package": [
+                {
+                    "name": "friendsofsymfony/elastica-bundle",
+                    "version": "dev-foobar-master",
+                    "require": {
+                        "ruflin/elastica": "2.*"
+                    }
+                }
+            ]
+        },
+        {
+            "type": "composer",
+            "url": "https://repo.packagist.org"
+        }
+    ],
+    "require": {
+        "friendsofsymfony/elastica-bundle": "dev-foobar-master"
+    }
+}
+
+--RUN--
+update
+--EXPECT-OUTPUT--
+Loading composer repositories with package information
+Updating dependencies
+Your requirements could not be resolved to an installable set of packages.
+
+  Problem 1
+    - Root composer.json requires friendsofsymfony/elastica-bundle dev-foobar-master -> satisfiable by friendsofsymfony/elastica-bundle[dev-foobar-master].
+    - friendsofsymfony/elastica-bundle dev-foobar-master requires ruflin/elastica 2.* -> satisfiable by ruflin/elastica[2.0.0, ..., 2.3.3] from composer repo (https://repo.packagist.org) but ruflin/elastica[dev-outdated-branch] from package repo (defining 1 package) has higher repository priority. The packages with higher priority do not match your constraint and are therefore not installable. See https://getcomposer.org/repoprio for details and assistance.
+
+--EXPECT--
+--EXPECT-EXIT-CODE--
+2