Allow another trap mismatch with v8

If Wasmtime thinks a module stack-overflows and v8 says that it does
something else that's ok. This means that the limits on v8 and Wasmtime
are different which is expected and not something we want fuzz-bugs
about.

crates/fuzzing/src/oracles/v8.rs

@@ -287,7 +287,18 @@ fn assert_error_matches(wasmtime: &anyhow::Error, v8: &str) {
             TrapCode::IntegerDivisionByZero => {
                 return verify_v8(&["divide by zero", "remainder by zero"])
             }
-            TrapCode::StackOverflow => return verify_v8(&["call stack size exceeded"]),
+            TrapCode::StackOverflow => {
+                return verify_v8(&[
+                    "call stack size exceeded",
+                    // Similar to the above comment in `UnreachableCodeReached`
+                    // if wasmtime hits a stack overflow but v8 ran all the way
+                    // to when the `unreachable` instruction was hit then that's
+                    // ok. This just means that wasmtime either has less optimal
+                    // codegen or different limits on the stack than v8 does,
+                    // which isn't an issue per-se.
+                    "unreachable",
+                ]);
+            }
             TrapCode::IndirectCallToNull => return verify_v8(&["null function"]),
             TrapCode::TableOutOfBounds => {
                 return verify_v8(&[