Update all dependencies to latest versions

wasmtime 31→43, wasm-encoder/wasmparser 0.228→0.246, rustyline 15→18.

API migrations: F64Const now takes Ieee64 wrapper, wasmtime has own
Error type (wasmtime::bail! in host closures), cache_config_load_default
removed. Add performance regression limits to benchmark tests.

crates/core/src/codegen.rs

@@ -349,7 +349,7 @@ fn emit_op(f: &mut Function, op: &IrOp, ctx: &mut EmitCtx) {
         IrOp::PushF64(val) => {
             fsp_dec(f);
             f.instruction(&Instruction::GlobalGet(FSP))
-                .instruction(&Instruction::F64Const(*val))
+                .instruction(&Instruction::F64Const((*val).into()))
                 .instruction(&Instruction::F64Store(MEM8));
         }
 
@@ -855,14 +855,14 @@ fn emit_op(f: &mut Function, op: &IrOp, ctx: &mut EmitCtx) {
         // -- Float comparisons (cross-stack) --------------------------------
         IrOp::FZeroEq => {
             fpop(f);
-            f.instruction(&Instruction::F64Const(0.0))
+            f.instruction(&Instruction::F64Const(0.0.into()))
                 .instruction(&Instruction::F64Eq);
             bool_to_forth_flag(f, SCRATCH_BASE);
             push_via_local(f, SCRATCH_BASE + 1);
         }
         IrOp::FZeroLt => {
             fpop(f);
-            f.instruction(&Instruction::F64Const(0.0))
+            f.instruction(&Instruction::F64Const(0.0.into()))
                 .instruction(&Instruction::F64Lt);
             bool_to_forth_flag(f, SCRATCH_BASE);
             push_via_local(f, SCRATCH_BASE + 1);

crates/core/src/outer.rs

@@ -282,8 +282,6 @@ impl ForthVM {
     pub fn new_with_config(wafer_config: WaferConfig) -> anyhow::Result<Self> {
         let mut config = wasmtime::Config::new();
         config.cranelift_nan_canonicalization(false);
-        // Best-effort module caching
-        let _ = config.cache_config_load_default();
         let engine = Engine::new(&config)?;
         let output = Arc::new(Mutex::new(String::new()));
 

crates/core/src/runner.rs

@@ -21,7 +21,7 @@ struct RunnerHost {}
 fn make_engine() -> anyhow::Result<Engine> {
     let mut config = wasmtime::Config::new();
     config.cranelift_nan_canonicalization(false);
-    Engine::new(&config)
+    Ok(Engine::new(&config)?)
 }
 
 /// Execute a pre-compiled `.wasm` module from a file path.
@@ -336,7 +336,7 @@ fn create_host_func(
                     ((hi << 32) | lo, divisor)
                 };
                 if divisor == 0 {
-                    anyhow::bail!("division by zero");
+                    wasmtime::bail!("division by zero");
                 }
                 let quot = (dividend / divisor) as u32;
                 let rem = (dividend % divisor) as u32;
@@ -368,7 +368,7 @@ fn create_host_func(
             // Unimplemented host function: trap with a clear message.
             let name_owned = name.to_string();
             Func::new(store, void_type, move |_caller, _params, _results| {
-                anyhow::bail!("host function '{name_owned}' is not available in standalone mode")
+                wasmtime::bail!("host function '{name_owned}' is not available in standalone mode")
             })
         }
     }