Filter out lines which begin with '# ' in inferno-flamegraph

src/flamegraph/merge.rs

@@ -124,9 +124,6 @@ where
     let mut prev_line = None;
     for line in lines {
         let mut line = line.trim();
-        if line.is_empty() {
-            continue;
-        }
 
         if !suppress_sort_check {
             if let Some(prev_line) = prev_line {

src/flamegraph/mod.rs

@@ -394,6 +394,8 @@ where
     W: Write,
 {
     let mut reversed = StrStack::new();
+    let lines = lines.into_iter().filter(|line| !(line.is_empty() || line.starts_with("# ")));
+
     let (mut frames, time, ignored, delta_max) = if opt.reverse_stack_order {
         if opt.no_sort {
             warn!(

tests/data/flamegraph/austin/flames.txt

@@ -0,0 +1,8 @@
+# austin: 3.3.0
+# interval: 100
+# mode: wall
+
+P6360;T6360;<frozen importlib._bootstrap>:_install_external_importers:1187;<frozen importlib._bootstrap>:_find_and_load:1007;<frozen importlib._bootstrap>:_find_and_load_unlocked:986;<frozen importlib._bootstrap>:_load_unlocked:680;<frozen importlib._bootstrap>:exec_module:838;<frozen importlib._bootstrap_external>:<module>:35;<frozen importlib._bootstrap>:_find_and_load:1007;<frozen importlib._bootstrap>:_find_and_load_unlocked:986;<frozen importlib._bootstrap>:_load_unlocked:680;<frozen importlib._bootstrap>:exec_module:768;<frozen importlib._bootstrap>:_call_with_frames_removed:228 105
+P6360;T6360;<frozen importlib._bootstrap>:_install_external_importers:1187;<frozen importlib._bootstrap>:_find_and_load:1007;<frozen importlib._bootstrap>:_find_and_load_unlocked:986;<frozen importlib._bootstrap>:_load_unlocked:680;<frozen importlib._bootstrap>:exec_module:838;<frozen importlib._bootstrap_external>:<module>:828 186
+
+# duration: 23873

tests/data/flamegraph/bad-lines/bad-lines.txt

@@ -6,3 +6,5 @@ cksum;main;cksum 19
 THIS IS A BAD FRACTIONAL LINE 12V.43
 noploop;[unknown] 2
 noploop;main 274
+
+noploop;main 274

tests/flamegraph.rs

@@ -883,3 +883,11 @@ fn flamegraph_flamechart() {
 
     test_flamegraph(input_file, expected_result_file, opts).unwrap();
 }
+
+#[test]
+fn flamegraph_austin() {
+    let input_file = "./tests/data/flamegraph/austin/flames.txt";
+    let expected_result_file = "./tests/data/flamegraph/austin/flame.svg";
+    let opts = flamegraph::Options::default();
+    test_flamegraph(input_file, expected_result_file, opts).unwrap();
+}