fix: rest parameter crash resolver

src/resolver.ts

@@ -392,7 +392,7 @@ export class Resolver extends DiagnosticEmitter {
           break;
         }
         case ParameterKind.Rest: {
-          assert(i == numParameters);
+          assert(i == numParameters - 1);
           hasRest = true;
           break;
         }

tests/compiler/issues/2707.debug.wat

@@ -0,0 +1,16 @@
+(module
+ (type $i32_=>_i32 (func (param i32) (result i32)))
+ (global $issues/2707/func (mut i32) (i32.const 32))
+ (global $~lib/memory/__data_end i32 (i32.const 44))
+ (global $~lib/memory/__stack_pointer (mut i32) (i32.const 32812))
+ (global $~lib/memory/__heap_base i32 (i32.const 32812))
+ (memory $0 1)
+ (data $0 (i32.const 12) "\1c\00\00\00\00\00\00\00\00\00\00\00\05\00\00\00\08\00\00\00\01\00\00\00\00\00\00\00\00\00\00\00")
+ (table $0 2 2 funcref)
+ (elem $0 (i32.const 1) $start:issues/2707~anonymous|0)
+ (export "memory" (memory $0))
+ (func $start:issues/2707~anonymous|0 (param $args i32) (result i32)
+  i32.const 1
+  return
+ )
+)

tests/compiler/issues/2707.json

@@ -0,0 +1,3 @@
+{
+  "asc_flags": []
+}

tests/compiler/issues/2707.release.wat

@@ -0,0 +1,6 @@
+(module
+ (memory $0 1)
+ (data $0 (i32.const 1036) "\1c")
+ (data $0.1 (i32.const 1048) "\05\00\00\00\08\00\00\00\01")
+ (export "memory" (memory $0))
+)

tests/compiler/issues/2707.ts

@@ -0,0 +1,4 @@
+// should not crash
+let func: (...args: i32[]) => i32 = (...args: i32[]) => {
+  return 1;
+};