introduce compressor.info() (#1633)

report the following only when `options.warnings = "verbose"`
- unused elements due to inlining
- collpased variables

2 files changed, 3 insertions, 6 deletions

diff --git a/test/compress/issue-1034.js b/test/compress/issue-1034.js
index b91eaced..57c584ab 100644
--- a/test/compress/issue-1034.js
+++ b/test/compress/issue-1034.js
@@ -39,7 +39,7 @@ non_hoisted_function_after_return_2a: {
         hoist_funs: false, dead_code: true, conditionals: true, comparisons: true,
         evaluate: true, booleans: true, loops: true, unused: true, keep_fargs: true,
         if_return: true, join_vars: true, cascade: true, side_effects: true,
-        collapse_vars: false, passes: 2
+        collapse_vars: false, passes: 2, warnings: "verbose"
     }
     input: {
         function foo(x) {
@@ -75,7 +75,7 @@ non_hoisted_function_after_return_2a: {
         "WARN: Declarations in unreachable code! [test/compress/issue-1034.js:53,12]",
         "WARN: Dropping unreachable code [test/compress/issue-1034.js:56,12]",
         "WARN: Dropping unused variable b [test/compress/issue-1034.js:51,20]",
-        "WARN: Dropping unused variable c [test/compress/issue-1034.js:53,16]"
+        "WARN: Dropping unused variable c [test/compress/issue-1034.js:53,16]",
     ]
 }
 
@@ -114,8 +114,5 @@ non_hoisted_function_after_return_2b: {
         "WARN: Dropping unreachable code [test/compress/issue-1034.js:97,12]",
         "WARN: Declarations in unreachable code! [test/compress/issue-1034.js:97,12]",
         "WARN: Dropping unreachable code [test/compress/issue-1034.js:101,12]",
-        "WARN: Dropping unused variable b [test/compress/issue-1034.js:95,20]",
-        "WARN: Dropping unused variable c [test/compress/issue-1034.js:97,16]"
     ]
 }
-
diff --git a/test/run-tests.js b/test/run-tests.js
index a3184d72..09e70021 100755
--- a/test/run-tests.js
+++ b/test/run-tests.js
@@ -114,7 +114,7 @@ function run_compress_tests() {
                 U.AST_Node.warn_function = function(text) {
                     warnings_emitted.push("WARN: " + text);
                 };
-                options.warnings = true;
+                if (!options.warnings) options.warnings = true;
             }
             var cmp = new U.Compressor(options, true);
             var output_options = test.beautify || {};