Use vsnprintf for safe debug string formatting - #216
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Fixes CLIENT-1JK. The issue was that: Wide-character
wvsprintfwrote into single-bytecharbuffer, corrupting memory; CRT cleanup later accessed corrupted pointer viawcsnlen.wvsprintfwithvsnprintffor debug string formatting.sizeof(curSource), preventing potential buffer overflows.This fix was generated by Seer in Sentry, triggered automatically. 👁️ Run ID: 8137094
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