feat: Allow capturing backtraces from anyhow (#341)

This also fixes parsing of backtraces that have both line and column numbers

CHANGELOG.md

@@ -6,6 +6,10 @@
 
 - The minium supported Rust version was bumped to **1.46.0** due to requirements from dependencies.
 
+**Features**:
+
+- Allow capturing backtraces from anyhow errors.
+
 **Fixes**:
 
 - Honor the `attach_stacktrace` option correctly when capturing errors.

sentry-anyhow/Cargo.toml

@@ -12,8 +12,9 @@ Sentry integration for anyhow.
 edition = "2018"
 
 [dependencies]
+sentry-backtrace = { version = "0.22.0", path = "../sentry-backtrace" }
 sentry-core = { version = "0.22.0", path = "../sentry-core" }
-anyhow = "1.0.30"
+anyhow = { version = "1.0.39", features = ["backtrace"] }
 
 [dev-dependencies]
 sentry = { version = "0.22.0", path = "../sentry", default-features = false, features = ["test"] }

sentry-anyhow/src/lib.rs

@@ -64,8 +64,33 @@ pub trait AnyhowHubExt {
 }
 
 impl AnyhowHubExt for Hub {
-    fn capture_anyhow(&self, e: &anyhow::Error) -> Uuid {
-        let e: &dyn std::error::Error = e.as_ref();
-        self.capture_error(e)
+    fn capture_anyhow(&self, anyhow_error: &anyhow::Error) -> Uuid {
+        let dyn_err: &dyn std::error::Error = anyhow_error.as_ref();
+        let mut event = sentry_core::event_from_error(dyn_err);
+
+        // exception records are sorted in reverse
+        if let Some(exc) = event.exception.iter_mut().last() {
+            let backtrace = anyhow_error.backtrace();
+            exc.stacktrace = sentry_backtrace::parse_stacktrace(&format!("{:#}", backtrace));
+        }
+
+        self.capture_event(event)
     }
 }
+
+#[test]
+fn test_has_backtrace() {
+    std::env::set_var("RUST_BACKTRACE", "1");
+
+    let events = sentry::test::with_captured_events(|| {
+        capture_anyhow(&anyhow::anyhow!("Oh jeez"));
+    });
+
+    let stacktrace = events[0].exception[0].stacktrace.as_ref().unwrap();
+    let found_test_fn = stacktrace.frames.iter().any(|frame| match &frame.function {
+        Some(f) => f.contains("test_has_backtrace"),
+        None => false,
+    });
+
+    assert!(found_test_fn);
+}

sentry-backtrace/src/parse.rs

@@ -24,6 +24,7 @@ lazy_static::lazy_static! {
                 \s+at\s                          # padded "at" in new line
                 (?P<path>[^\r\n]+?)              # path to source file
                 (?::(?P<lineno>\d+))?            # optional source line
+                (?::(?P<colno>\d+))?             # optional source column
             )?
         $
     "#).unwrap();
@@ -34,7 +35,7 @@ pub fn parse_stacktrace(bt: &str) -> Option<Stacktrace> {
     let mut last_address = None;
 
     let frames = FRAME_RE
-        .captures_iter(&bt)
+        .captures_iter(bt)
         .map(|captures| {
             let abs_path = captures.name("path").map(|m| m.as_str().to_string());
             let filename = abs_path.as_ref().map(|p| filename(p).to_string());
@@ -63,6 +64,9 @@ pub fn parse_stacktrace(bt: &str) -> Option<Stacktrace> {
                 lineno: captures
                     .name("lineno")
                     .map(|x| x.as_str().parse::<u64>().unwrap()),
+                colno: captures
+                    .name("colno")
+                    .map(|x| x.as_str().parse::<u64>().unwrap()),
                 ..Default::default()
             }
         })