danog/psalm
1
0
Fork 0
mirror of https://github.com/danog/psalm.git synced 2025-01-21 21:31:13 +01:00
Code Issues Projects Releases Wiki Activity

Fix crash for empty string array access

Browse Source
This commit is contained in:
bugreportuser 2019-02-24 18:41:53 -06:00 committed by Matthew Brown
parent 4f770d356e
commit 7f7125f334
2 changed files with 15 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
src/Psalm/Internal/Analyzer/Statements/Expression/Fetch/ArrayFetchAnalyzer.php
View File

@ -642,13 +642,17 @@ class ArrayFetchAnalyzer
if ($type instanceof TSingleLetter) {
$valid_offset_type = Type::getInt(false, 0);
} elseif ($type instanceof TLiteralString) {
$valid_offsets = [];
if (!strlen($type->value)) {
$valid_offset_type = Type::getEmpty();
} else {
$valid_offsets = [];
for ($i = -strlen($type->value), $l = strlen($type->value); $i < $l; $i++) {
$valid_offsets[] = new TLiteralInt($i);
for ($i = -strlen($type->value), $l = strlen($type->value); $i < $l; $i++) {
$valid_offsets[] = new TLiteralInt($i);
}
$valid_offset_type = new Type\Union($valid_offsets);
}
$valid_offset_type = new Type\Union($valid_offsets);
} else {
$valid_offset_type = Type::getInt();
}

6
tests/ArrayAccessTest.php
View File

@ -571,6 +571,12 @@ class ArrayAccessTest extends TestCase
echo $a[-6];',
'error_message' => 'InvalidArrayOffset',
],
'emptyStringAccess' => [
'<?php
$a = "";
echo $a[0];',
'error_message' => 'InvalidArrayOffset',
],
];
}
}