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LibJS: Don't infinite loop on unknown console.log formatting specifiers

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This commit is contained in:
Andreas Kling
2024-09-26 07:42:49 +02:00
committed by Andreas Kling
parent 84351dfa51
commit ef9208047d
3 changed files with 9 additions and 1 deletions
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1
Tests/LibWeb/Text/expected/regress/console-log-bogus-formatting-specifier.txt Normal file
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@@ -0,0 +1 @@
PASS (didn't hang)

7
Tests/LibWeb/Text/input/regress/console-log-bogus-formatting-specifier.html Normal file
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@@ -0,0 +1,7 @@
<script src="../include.js"></script>
<script>
test(() => {
console.log("%z%z", 1, 2);
println("PASS (didn't hang)");
});
</script>

2
Userland/Libraries/LibJS/Console.cpp
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@@ -818,7 +818,7 @@ ThrowCompletionOr<MarkedVector<Value>> ConsoleClient::formatter(MarkedVector<Val
auto find_specifier = [](StringView target) -> Optional<StringView> { auto find_specifier = [](StringView target) -> Optional<StringView> {
size_t start_index = 0; size_t start_index = 0;
while (start_index < target.length()) { while (start_index < target.length()) {
auto maybe_index = target.find('%'); auto maybe_index = target.find('%', start_index);
if (!maybe_index.has_value()) if (!maybe_index.has_value())
return {}; return {};