* [committed] libstdc++: Make spurious std::random_device FAIL less likely
@ 2021-11-09 14:41 Jonathan Wakely
0 siblings, 0 replies; only message in thread
From: Jonathan Wakely @ 2021-11-09 14:41 UTC (permalink / raw)
To: libstdc++, gcc-patches
Tested x86_64-linux, committed to trunk.
It's possible that independent reads from /dev/random and /dev/urandom
could produce the same value by chance. Retry if that happens. The
chances of it happening twice are miniscule.
libstdc++-v3/ChangeLog:
* testsuite/26_numerics/random/random_device/cons/token.cc:
Retry if random devices produce the same value.
---
.../testsuite/26_numerics/random/random_device/cons/token.cc | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libstdc++-v3/testsuite/26_numerics/random/random_device/cons/token.cc b/libstdc++-v3/testsuite/26_numerics/random/random_device/cons/token.cc
index d6ac3a37c64..07713e5c67f 100644
--- a/libstdc++-v3/testsuite/26_numerics/random/random_device/cons/token.cc
+++ b/libstdc++-v3/testsuite/26_numerics/random/random_device/cons/token.cc
@@ -42,7 +42,7 @@ test02()
#ifdef _GLIBCXX_USE_DEV_RANDOM
std::random_device x1("/dev/urandom");
std::random_device x2("/dev/random");
- VERIFY( x1() != x2() );
+ VERIFY( x1() != x2() || x1() != x2() );
#endif
}
--
2.31.1
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