diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 37dbff82b..14a830dd6 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -59,6 +59,8 @@ jobs:
     - run: cargo build
     - run: cargo test
     - run: cargo test --features "gimli-symbolize"
+    - run: cargo test --features "libbacktrace"
+    - run: cargo test --features "libbacktrace gimli-symbolize"
     - run: cargo test --features "serialize-rustc"
     - run: cargo test --features "serialize-serde"
     - run: cargo test --features "verify-winapi"
@@ -66,6 +68,7 @@ jobs:
     - run: cargo test --no-default-features
     - run: cargo test --no-default-features --features "libbacktrace"
     - run: cargo test --no-default-features --features "gimli-symbolize"
+    - run: cargo test --no-default-features --features "gimli-symbolize libbacktrace"
     - run: cargo test --no-default-features --features "libbacktrace std"
     - run: cargo test --no-default-features --features "gimli-symbolize std"
     - run: cargo test --no-default-features --features "std"
@@ -182,5 +185,5 @@ jobs:
       with:
         submodules: true
     - name: Install Rust
-      run: rustup update 1.32.0 && rustup default 1.32.0
+      run: rustup update 1.40.0 && rustup default 1.40.0
     - run: cargo build
diff --git a/Cargo.toml b/Cargo.toml
index 0a7cd8a45..6e97821d8 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -49,8 +49,8 @@ features = ['read_core', 'elf', 'macho', 'pe']
 winapi = { version = "0.3.3", optional = true }
 
 [features]
-# By default libstd support and libbacktrace is used to symbolize addresses.
-default = ["std", "libbacktrace"]
+# By default libstd support and gimli-symbolize is used to symbolize addresses.
+default = ["std", "gimli-symbolize"]
 
 # Include std support. This enables types like `Backtrace`.
 std = []
@@ -58,16 +58,17 @@ std = []
 #=======================================
 # Methods of resolving symbols
 #
-# - libbacktrace: this feature activates the `backtrace-sys` dependency,
-#   building the libbacktrace library found in gcc repos. This is the historical
-#   default for the `backtrace` crate.
 # - gimli-symbolize: use the `gimli-rs/addr2line` crate to symbolicate
 #   addresses into file, line, and name using DWARF debug information.
+# - libbacktrace: this feature activates the `backtrace-sys` dependency,
+#   building the libbacktrace library found in gcc repos.
 #
 # Note that MSVC unconditionally uses the dbghelp library to symbolize and won't
-# be affected by feature selection here.
-libbacktrace = ["backtrace-sys/backtrace-sys"]
+# be affected by feature selection here. Also note that it's highly unlikely you
+# want to configure this. If you're having trouble getting backtraces it's
+# likely best to open an issue.
 gimli-symbolize = ["addr2line", "object", "std"]
+libbacktrace = ["backtrace-sys/backtrace-sys"]
 
 #=======================================
 # Methods of serialization
diff --git a/src/symbolize/gimli.rs b/src/symbolize/gimli.rs
index 36709761b..4205f5d84 100644
--- a/src/symbolize/gimli.rs
+++ b/src/symbolize/gimli.rs
@@ -282,7 +282,6 @@ cfg_if::cfg_if! {
         use self::elf::Object;
 
         fn native_libraries() -> Vec<Library> {
-            wut();
             let mut ret = Vec::new();
             unsafe {
                 libc::dl_iterate_phdr(Some(callback), &mut ret as *mut _ as *mut _);
diff --git a/src/symbolize/mod.rs b/src/symbolize/mod.rs
index acb90e4f9..4a3d6abb5 100644
--- a/src/symbolize/mod.rs
+++ b/src/symbolize/mod.rs
@@ -463,6 +463,7 @@ cfg_if::cfg_if! {
         unsafe fn clear_symbol_cache_imp() {}
     } else if #[cfg(all(
         feature = "gimli-symbolize",
+        any(unix, windows),
         not(target_os = "emscripten"),
     ))] {
         mod gimli;