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LibJS: Avoid crash on empty stack trace

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We were trying to stringify the stack trace without the last element,
leading to a loop bound of (size_t)(0 - 1) and accessing m_traceback[0]
out-of-bounds.

Instead, just return an empty string in that case.

Fixes #21747
This commit is contained in:
Simon Wanner 2023-11-02 16:11:33 +01:00 • committed by Andreas Kling
commit 1030776f92
Notes: sideshowbarker 2024-07-17 04:10:16 +09:00
1 changed files with 3 additions and 0 deletions
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3
Userland/Libraries/LibJS/Runtime/Error.cpp
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@ -93,6 +93,9 @@ void Error::populate_stack()
String Error::stack_string(CompactTraceback compact) const
{
if (m_traceback.is_empty())
return {};
StringBuilder stack_string_builder;
// Note: We roughly follow V8's formatting