lib: clean up usage of threw

lib/internal/bootstrap_node.js

@@ -343,20 +343,14 @@
   }
 
   function tryGetCwd(path) {
-    var threw = true;
-    var cwd;
     try {
-      cwd = process.cwd();
-      threw = false;
-    } finally {
-      if (threw) {
-        // getcwd(3) can fail if the current working directory has been deleted.
-        // Fall back to the directory name of the (absolute) executable path.
-        // It's not really correct but what are the alternatives?
-        return path.dirname(process.execPath);
-      }
+      return process.cwd();
+    } catch (ex) {
+      // getcwd(3) can fail if the current working directory has been deleted.
+      // Fall back to the directory name of the (absolute) executable path.
+      // It's not really correct but what are the alternatives?
+      return path.dirname(process.execPath);
     }
-    return cwd;
   }
 
   function evalScript(name) {

lib/timers.js

@@ -232,13 +232,9 @@ function listOnTimeout() {
 // 4.7) what is in this smaller function.
 function tryOnTimeout(timer, list) {
   timer._called = true;
-  var threw = true;
   try {
     ontimeout(timer);
-    threw = false;
-  } finally {
-    if (!threw) return;
-
+  } catch (ex) {
     // We need to continue processing after domain error handling
     // is complete, but not by using whatever domain was left over
     // when the timeout threw its exception.
@@ -247,6 +243,7 @@ function tryOnTimeout(timer, list) {
     // If we threw, we need to process the rest of the list in nextTick.
     process.nextTick(listOnTimeoutNT, list);
     process.domain = domain;
+    throw ex;
   }
 }
 

test/message/timeout_throw.out

@@ -1,6 +1,6 @@
-*test*message*timeout_throw.js:*
-  undefined_reference_error_maker;
-  ^
+timers.js:*
+    throw ex;
+    ^
 ReferenceError: undefined_reference_error_maker is not defined
     at Timeout._onTimeout (*test*message*timeout_throw.js:*:*)
     at ontimeout (timers.js:*:*)