From 7399638e43fb7e7c361efe8ec38b0baf3fc49676 Mon Sep 17 00:00:00 2001
From: Rob Bast <rob.bast@gmail.com>
Date: Tue, 11 Jun 2019 13:33:05 +0200
Subject: [PATCH 1/2] fixes #8179

---
 src/Composer/Repository/Vcs/HgDriver.php | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/Composer/Repository/Vcs/HgDriver.php b/src/Composer/Repository/Vcs/HgDriver.php
index 45f13d5fe..f943a8a0a 100644
--- a/src/Composer/Repository/Vcs/HgDriver.php
+++ b/src/Composer/Repository/Vcs/HgDriver.php
@@ -61,8 +61,9 @@ class HgDriver extends VcsDriver
                 // clean up directory and do a fresh clone into it
                 $fs->removeDirectory($this->repoDir);
 
-                $command = function ($url) {
-                    return sprintf('hg clone --noupdate %s %s', ProcessExecutor::escape($url), ProcessExecutor::escape($this->repoDir));
+                $repoDir = $this->repoDir;
+                $command = function ($url) use ($repoDir) {
+                    return sprintf('hg clone --noupdate %s %s', ProcessExecutor::escape($url), ProcessExecutor::escape($repoDir));
                 };
 
                 $hgUtils->runCommand($command, $this->url, $this->repoDir);

From 89d5d8f1824d66163ee04761567c11e81f814a61 Mon Sep 17 00:00:00 2001
From: Nicolas Grekas <nicolas.grekas@gmail.com>
Date: Fri, 21 Jun 2019 18:34:16 +0200
Subject: [PATCH 2/2] Free $solver asap

---
 src/Composer/Installer.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/Composer/Installer.php b/src/Composer/Installer.php
index 8573f3695..9583c3eb1 100644
--- a/src/Composer/Installer.php
+++ b/src/Composer/Installer.php
@@ -473,6 +473,8 @@ class Installer
         $solver = new Solver($policy, $pool, $installedRepo, $this->io);
         try {
             $operations = $solver->solve($request, $this->ignorePlatformReqs);
+            $ruleSetSize = $solver->getRuleSetSize();
+            $solver = null;
         } catch (SolverProblemsException $e) {
             $this->io->writeError('<error>Your requirements could not be resolved to an installable set of packages.</error>', true, IOInterface::QUIET);
             $this->io->writeError($e->getMessage());
@@ -489,7 +491,7 @@ class Installer
         $this->eventDispatcher->dispatchInstallerEvent(InstallerEvents::POST_DEPENDENCIES_SOLVING, $this->devMode, $policy, $pool, $installedRepo, $request, $operations);
 
         $this->io->writeError("Analyzed ".count($pool)." packages to resolve dependencies", true, IOInterface::VERBOSE);
-        $this->io->writeError("Analyzed ".$solver->getRuleSetSize()." rules to resolve dependencies", true, IOInterface::VERBOSE);
+        $this->io->writeError("Analyzed ".$ruleSetSize." rules to resolve dependencies", true, IOInterface::VERBOSE);
 
         // execute operations
         if (!$operations) {