Rollup merge of rust-lang#70958 - Amanieu:android_try_reserve, r=Mark-Simulacrum

Disable try_reserve tests on Android

Calling `realloc` with large sizes seems to be broken on older Android versions that use dlmalloc as the default allocator. This is not an issue for modern Android versions that use jemalloc.

Fixes rust-lang#55861

Author: Centril

src/liballoc/tests/string.rs

@@ -555,6 +555,7 @@ fn test_reserve_exact() {
 
 #[test]
 #[cfg_attr(miri, ignore)] // Miri does not support signalling OOM
+#[cfg_attr(target_os = "android", ignore)] // Android used in CI has a broken dlmalloc
 fn test_try_reserve() {
     // These are the interesting cases:
     // * exactly isize::MAX should never trigger a CapacityOverflow (can be OOM)
@@ -644,6 +645,7 @@ fn test_try_reserve() {
 
 #[test]
 #[cfg_attr(miri, ignore)] // Miri does not support signalling OOM
+#[cfg_attr(target_os = "android", ignore)] // Android used in CI has a broken dlmalloc
 fn test_try_reserve_exact() {
     // This is exactly the same as test_try_reserve with the method changed.
     // See that test for comments.

src/liballoc/tests/vec.rs

@@ -1137,6 +1137,7 @@ fn test_reserve_exact() {
 
 #[test]
 #[cfg_attr(miri, ignore)] // Miri does not support signalling OOM
+#[cfg_attr(target_os = "android", ignore)] // Android used in CI has a broken dlmalloc
 fn test_try_reserve() {
     // These are the interesting cases:
     // * exactly isize::MAX should never trigger a CapacityOverflow (can be OOM)
@@ -1254,6 +1255,7 @@ fn test_try_reserve() {
 
 #[test]
 #[cfg_attr(miri, ignore)] // Miri does not support signalling OOM
+#[cfg_attr(target_os = "android", ignore)] // Android used in CI has a broken dlmalloc
 fn test_try_reserve_exact() {
     // This is exactly the same as test_try_reserve with the method changed.
     // See that test for comments.

src/liballoc/tests/vec_deque.rs

@@ -1134,6 +1134,7 @@ fn test_reserve_exact_2() {
 
 #[test]
 #[cfg_attr(miri, ignore)] // Miri does not support signalling OOM
+#[cfg_attr(target_os = "android", ignore)] // Android used in CI has a broken dlmalloc
 fn test_try_reserve() {
     // These are the interesting cases:
     // * exactly isize::MAX should never trigger a CapacityOverflow (can be OOM)
@@ -1248,6 +1249,7 @@ fn test_try_reserve() {
 
 #[test]
 #[cfg_attr(miri, ignore)] // Miri does not support signalling OOM
+#[cfg_attr(target_os = "android", ignore)] // Android used in CI has a broken dlmalloc
 fn test_try_reserve_exact() {
     // This is exactly the same as test_try_reserve with the method changed.
     // See that test for comments.