From looking at the stack.txt file, it appears to crash inside the function.
PHP Code:
CTerrorPlayer::OnTakeDamageInternal(CTakeDamageInfo &)
The register ECX is a null pointer which leads to the crash from accessing memory at location 0x0.
Look for plugins that call
PHP Code:
SDKHooks_TakeDamage
or hook it. I can see your last plugin on the list
PHP Code:
91 "[L4D2] Gnome and Cola Shove Damage" (1.0.9) by Mart
calls SDKHooks_TakeDamage. I would start by unloading plugins that manipulate or cause damage to occur until you have no more crashes.