fix: assembly dead code eliminator

vyper/ir/compile_ir.py

@@ -809,14 +809,18 @@ def _prune_unreachable_code(assembly):
     # unreachable
     changed = False
     i = 0
-    while i < len(assembly) - 2:
+    while i < len(assembly) - 1:
         instr = assembly[i]
         if isinstance(instr, list):
             instr = assembly[i][-1]
 
-        if assembly[i] in _TERMINAL_OPS and not (
-            is_symbol(assembly[i + 1]) or isinstance(assembly[i + 1], list)
-        ):
+        is_terminal = assembly[i] in _TERMINAL_OPS
+        next_is_jumpdest = (
+            i + 2 < len(assembly) and is_symbol(assembly[i + 1]) and assembly[i + 2] == "JUMPDEST"
+        )
+        next_is_list = isinstance(assembly[i + 1], list)
+
+        if is_terminal and not (next_is_jumpdest or next_is_list):
             changed = True
             del assembly[i + 1]
         else:
@@ -1230,7 +1234,6 @@ def assembly_to_evm_with_symbol_map(assembly, pc_ofst=0, insert_compiler_metadat
             if is_symbol_map_indicator(assembly[i + 1]):
                 # Don't increment pc as the symbol itself doesn't go into code
                 if item in symbol_map:
-                    print(assembly)
                     raise CompilerPanic(f"duplicate jumpdest {item}")
 
                 symbol_map[item] = pc