Address feedback

.travis.yml

@@ -32,7 +32,7 @@ matrix:
       rust: stable
       env: TARGET=x86_64-unknown-linux-gnu
     - name: "x86_64-unknown-linux-gnu (Rust 1.29.0)"
-      rust: stable
+      rust: 1.29.0
       env: TARGET=x86_64-unknown-linux-gnu
     - name: "i686-unknown-linux-gnu"
       env: TARGET=i686-unknown-linux-gnu CROSS=1

ci/run.sh

@@ -7,7 +7,7 @@ set -ex
 FEATURES="rayon,serde"
 if [ "${TRAVIS_RUST_VERSION}" = "nightly" ]; then
     FEATURES="${FEATURES},nightly"
-    export RUSTFLAGS="$RUSTFLAGS --cfg hashbrown_deny_warnings"
+    export RUSTFLAGS="$RUSTFLAGS -D warnings"
 fi
 
 CARGO=cargo
@@ -25,7 +25,7 @@ export RUSTFLAGS="$RUSTFLAGS --cfg hashbrown_deny_warnings"
 "${CARGO}" -vv test --target="${TARGET}" --features "${FEATURES}"
 
 "${CARGO}" -vv test --target="${TARGET}" --release
-"${CARGO}" -vv test --target="${TARGET}" --features "${FEATURES}"
+"${CARGO}" -vv test --target="${TARGET}" --release --features "${FEATURES}"
 
 if [ "${TRAVIS_RUST_VERSION}" = "nightly" ]; then
     # Run benchmark on native targets, build them on non-native ones:

clippy.toml

@@ -1 +1 @@
-doc-valid-idents = [ "CppCon", "SwissTable", "SipHash", "HashDoS" ]
+doc-valid-idents = [ "CppCon", "SwissTable", "SipHash", "HashDoS" ]

src/lib.rs

@@ -23,7 +23,6 @@
     )
 )]
 #![warn(missing_docs)]
-#![cfg_attr(hashbrown_deny_warnings, deny(warnings))]
 #![allow(clippy::module_name_repetitions)]
 
 #[cfg(test)]

src/map.rs

@@ -3398,7 +3398,13 @@ mod test_map {
 
         if let Err(AllocErr) = empty_bytes.try_reserve(MAX_USIZE / 8) {
         } else {
-            panic!("usize::MAX / 8 should trigger an OOM!")
+            // This may succeed if there is enough free memory. Attempt to
+            // allocate a second hashmap to ensure the allocation will fail.
+            let mut empty_bytes2: HashMap<u8, u8> = HashMap::new();
+            if let Err(AllocErr) = empty_bytes2.try_reserve(MAX_USIZE / 8) {
+            } else {
+                panic!("usize::MAX / 8 should trigger an OOM!");
+            }
         }
     }