ADDITIONAL SYSTEM INFORMATION : ARCH: x86_64 OS: Ubuntu 20.04.5 LTS Javac: javac 11.0.19-internal Java - openjdk version "11.0.19-internal" 2023-04-18 - OpenJDK Runtime Environment (fastdebug build 11.0.19-internal+0-adhoc.simon.jdk11u-dev) - OpenJDK 64-Bit Server VM (fastdebug build 11.0.19-internal+0-adhoc.simon.jdk11u-dev, mixed mode) A DESCRIPTION OF THE PROBLEM : The given test makes HotSpot crash with the following assertion failure: ``` # A fatal error has been detected by the Java Runtime Environment: # # Internal Error (/home/simon/JVMs/jdk11u-dev/src/hotspot/share/opto/phaseX.cpp:955), pid=85742, tid=85759 # assert(no_dead_loop) failed: dead loop detected ``` STEPS TO FOLLOW TO REPRODUCE THE PROBLEM : 1. javac T.java 2. java T EXPECTED VERSUS ACTUAL BEHAVIOR : EXPECTED - No crash ACTUAL - HotSpot crashed ---------- BEGIN SOURCE ---------- class T { static boolean r; void zoo() { int w, q = 140; int e, y, u = 25121; short s = 23261; for (w = 8; ; ++w) { r = w >= 171; if (r) { for (e = 1; e < 3; ) { try { y = q; } catch (ArithmeticException x) { } int m = e; try { int i, j, k, h; byte[] a = new byte[w]; for (i = 14; 297 > i; ) for (int n = 151430; n < 235417; n += 2) {} for (j = 4; 179 > j; ++j) for (k = 1; k < 58; k++) for (h = k; 400 > h; ) j >>= e; } catch (Throwable x) { } finally { } if (r) break; } } else u += s; } } public static void main(String[] g) { new T().zoo(); } } ---------- END SOURCE ---------- FREQUENCY : always
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