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When changing watched literals of a rule, update the parent's next pointer 

The previous rule was not previously updated to point to the next rule when
removing a middle rule from the watch tree for a literal. This resulted in
jumping from one literal's watch tree to another's, which could then jump
back to the original and cause infinite loop in a case like #265.

Fixes #265
pull/325/head
Nils Adermann 2012-02-19 15:35:13 +01:00
parent 8484199677
commit 1ee5d99405
2 changed files with 49 additions and 4 deletions
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15
src/Composer/DependencyResolver/Solver.php
View File

@ -1222,7 +1222,8 @@ class Solver
continue;
}
for ($rule = $this->watches[$literal->getId()]; $rule !== null; $rule = $nextRule) {
$prevRule = null;
for ($rule = $this->watches[$literal->getId()]; $rule !== null; $prevRule = $rule, $rule = $nextRule) {
$nextRule = $rule->getNext($literal);
if ($rule->isDisabled()) {
@ -1242,7 +1243,6 @@ class Solver
if ($otherWatch !== $ruleLiteral->getId() &&
!$this->decisionsConflict($ruleLiteral)) {
if ($literal->getId() === $rule->watch1) {
$rule->watch1 = $ruleLiteral->getId();
$rule->next1 = (isset($this->watches[$ruleLiteral->getId()])) ? $this->watches[$ruleLiteral->getId()] : null;
@ -1251,6 +1251,17 @@ class Solver
$rule->next2 = (isset($this->watches[$ruleLiteral->getId()])) ? $this->watches[$ruleLiteral->getId()] : null;
}
if ($prevRule) {
if ($prevRule->watch1 === $literal->getId()) {
$prevRule->next1 = $nextRule;
} else {
$prevRule->next2 = $nextRule;
}
}
else {
$this->watches[$literal->getId()] = $nextRule;
}
$this->watches[$ruleLiteral->getId()] = $rule;
continue 2;
}

34
tests/Composer/Test/DependencyResolver/SolverTest.php
View File

@ -485,6 +485,40 @@ class SolverTest extends TestCase
));
}
public function testIssue265()
{
$this->repo->addPackage($packageA1 = $this->getPackage('A', '2.0.999999-dev'));
$this->repo->addPackage($packageA2 = $this->getPackage('A', '2.1-dev'));
$this->repo->addPackage($packageA3 = $this->getPackage('A', '2.2-dev'));
$this->repo->addPackage($packageB1 = $this->getPackage('B', '2.0.10'));
$this->repo->addPackage($packageB2 = $this->getPackage('B', '2.0.9'));
$this->repo->addPackage($packageC = $this->getPackage('C', '2.0-dev'));
$this->repo->addPackage($packageD = $this->getPackage('D', '2.0.9'));
$packageC->setRequires(array(
new Link('C', 'A', new VersionConstraint('>=', '2.0'), 'requires'),
new Link('C', 'D', new VersionConstraint('>=', '2.0'), 'requires'),
));
$packageD->setRequires(array(
new Link('D', 'A', new VersionConstraint('>=', '2.1'), 'requires'),
new Link('D', 'B', new VersionConstraint('>=', '2.0-dev'), 'requires'),
));
$packageB1->setRequires(array(new Link('B', 'A', new VersionConstraint('==', '2.1.0.0-dev'), 'requires')));
$packageB2->setRequires(array(new Link('B', 'A', new VersionConstraint('==', '2.1.0.0-dev'), 'requires')));
$packageB2->setReplaces(array(new Link('B', 'D', new VersionConstraint('==', '2.0.9.0'), 'replaces')));
$this->reposComplete();
$this->request->install('C', new VersionConstraint('==', '2.0.0.0-dev'));
$this->setExpectedException('Composer\DependencyResolver\SolverProblemsException');
$this->solver->solve($this->request);
}
public function testConflictResultEmpty()
{
$this->repo->addPackage($packageA = $this->getPackage('A', '1.0'));