[lld] [lld][WebAssembly] Report undefined symbols by default -shared/-pie builds (PR #75242)

[Derek Schuff via llvm-commits]

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@@ -548,6 +582,7 @@ bool ObjFile::isExcludedByComdat(const InputChunk *chunk) const {
 }
 
 FunctionSymbol *ObjFile::getFunctionSymbol(uint32_t index) const {
+  assert(isa<FunctionSymbol>(symbols[index]));
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dschuff wrote:

I think `cast` already has this same assertion built-in. 

https://github.com/llvm/llvm-project/pull/75242