The following test failed in the JDK16 CI:

serviceability/sa/TestPrintMdo.java

Here's a snippet from the log file:

----------System.err:(158/6615)----------
 stdout: [ + printmdo -a
MethodData 0x00007f5a84c1dc80 for method sun/nio/fs/UnixPath.checkNotNul(Ljava/lang/String;C)V@0x00000008003142c8
0 bci: 1 BranchData taken(40) displacement(48)
not taken(0)
32 bci: 11 CounterData count(0)
--- Extra data:
80 bci: 0 ArgInfoData 0x0 0x0
MethodData 0x00007f5a84c1e638 for method java/lang/StringLatin1.hashCode([B)I@0x0000000800030bd8
0 bci: 13 BranchData taken(0) displacement(56)
not taken(0)
32 bci: 37 JumpData taken(0) displacement(-32)
--- Extra data:
88 bci: 0 ArgInfoData 0x0
MethodData 0x00007f5a84c0d6a8 for method java/lang/StringLatin1.charAt([BI)C@0x0000000800031238
0 bci: 1 BranchData taken(0) displacement(64)
not taken(1042)
32 bci: 7 BranchData taken(1042) displacement(48)
not taken(0)
64 bci: 15 CounterData count(0)
--- Extra data:
112 bci: 0 ArgInfoData 0x0 0x0
MethodData 0x00007f5a84c120d8 for method java/lang/String.length()I@0x00000008004402d8
0 bci: 6 VirtualCallData count(292) entries(0)
--- Extra data:
104 bci: 0 ArgInfoData 0x0
MethodData 0x00007f5a84c1e348 for method java/lang/String.hashCode()I@0x0000000800440bd8
0 bci: 6 BranchData taken(0) displacement(264)
not taken(0)
32 bci: 13 BranchData taken(0) displacement(232)
not taken(0)
64 bci: 17 VirtualCallData count(0) entries(0)
120 bci: 20 BranchData taken(0) displacement(72)
not taken(0)
152 bci: 27 CounterData count(0)
168 bci: 30 JumpData taken(0) displacement(40)
192 bci: 37 CounterData count(0)
208 bci: 42 BranchData taken(0) displacement(56)
not taken(0)
240 bci: 50 JumpData taken(0) displacement(24)
--- Extra data:
312 bci: 0 ArgInfoData 0x0
MethodData 0x00007f5a84c0f790 for method java/lang/String.coder()B@0x0000000800441358
0 bci: 3 BranchData taken(0) displacement(56)
not taken(895)
32 bci: 10 JumpData taken(895) displacement(24)
--- Extra data:
88 bci: 0 ArgInfoData 0x0
MethodData 0x00007f5a84c0d210 for method java/lang/String.isLatin1()Z@0x0000000800441478
0 bci: 3 BranchData taken(0) displacement(88)
not taken(1561)
32 bci: 10 BranchData taken(0) displacement(56)
not taken(1561)
64 bci: 14 JumpData taken(1561) displacement(24)
--- Extra data:
120 bci: 0 ArgInfoData 0x0
MethodData 0x00007f5a84c0d440 for method java/lang/String.charAt(I)C@0x0000000800440278
0 bci: 1 VirtualCallData count(1042) entries(0)
56 bci: 4 BranchData taken(0) displacement(48)
not taken(1042)
88 bci: 12 CounterData count(1042)
104 bci: 21 CounterData count(0)
--- Extra data:
168 bci: 0 ArgInfoData 0x0 0x0
MethodData 0x00007f5a84c0e4f0 for method java/lang/Object.<init>()V@0x000000080045b610
--- Extra data:
8 bci: 0 ArgInfoData 0x0
];
 stderr: [ + printmdo -a
MethodData 0x00007f5a84c1dc80 for method sun/nio/fs/UnixPath.checkNotNul(Ljava/lang/String;C)V@0x00000008003142c8
0 bci: 1 BranchData taken(40) displacement(48)
not taken(0)
32 bci: 11 CounterData count(0)
--- Extra data:
80 bci: 0 ArgInfoData 0x0 0x0
MethodData 0x00007f5a84c1e638 for method java/lang/StringLatin1.hashCode([B)I@0x0000000800030bd8
0 bci: 13 BranchData taken(0) displacement(56)
not taken(0)
32 bci: 37 JumpData taken(0) displacement(-32)
--- Extra data:
88 bci: 0 ArgInfoData 0x0
MethodData 0x00007f5a84c0d6a8 for method java/lang/StringLatin1.charAt([BI)C@0x0000000800031238
0 bci: 1 BranchData taken(0) displacement(64)
not taken(1042)
32 bci: 7 BranchData taken(1042) displacement(48)
not taken(0)
64 bci: 15 CounterData count(0)
--- Extra data:
112 bci: 0 ArgInfoData 0x0 0x0
MethodData 0x00007f5a84c120d8 for method java/lang/String.length()I@0x00000008004402d8
0 bci: 6 VirtualCallData count(292) entries(0)
--- Extra data:
104 bci: 0 ArgInfoData 0x0
MethodData 0x00007f5a84c1e348 for method java/lang/String.hashCode()I@0x0000000800440bd8
0 bci: 6 BranchData taken(0) displacement(264)
not taken(0)
32 bci: 13 BranchData taken(0) displacement(232)
not taken(0)
64 bci: 17 VirtualCallData count(0) entries(0)
120 bci: 20 BranchData taken(0) displacement(72)
not taken(0)
152 bci: 27 CounterData count(0)
168 bci: 30 JumpData taken(0) displacement(40)
192 bci: 37 CounterData count(0)
208 bci: 42 BranchData taken(0) displacement(56)
not taken(0)
240 bci: 50 JumpData taken(0) displacement(24)
--- Extra data:
312 bci: 0 ArgInfoData 0x0
MethodData 0x00007f5a84c0f790 for method java/lang/String.coder()B@0x0000000800441358
0 bci: 3 BranchData taken(0) displacement(56)
not taken(895)
32 bci: 10 JumpData taken(895) displacement(24)
--- Extra data:
88 bci: 0 ArgInfoData 0x0
MethodData 0x00007f5a84c0d210 for method java/lang/String.isLatin1()Z@0x0000000800441478
0 bci: 3 BranchData taken(0) displacement(88)
not taken(1561)
32 bci: 10 BranchData taken(0) displacement(56)
not taken(1561)
64 bci: 14 JumpData taken(1561) displacement(24)
--- Extra data:
120 bci: 0 ArgInfoData 0x0
MethodData 0x00007f5a84c0d440 for method java/lang/String.charAt(I)C@0x0000000800440278
0 bci: 1 VirtualCallData count(1042) entries(0)
56 bci: 4 BranchData taken(0) displacement(48)
not taken(1042)
88 bci: 12 CounterData count(1042)
104 bci: 21 CounterData count(0)
--- Extra data:
168 bci: 0 ArgInfoData 0x0 0x0
MethodData 0x00007f5a84c0e4f0 for method java/lang/Object.<init>()V@0x000000080045b610
--- Extra data:
8 bci: 0 ArgInfoData 0x0
]
 exitValue = -1

java.lang.RuntimeException: Test ERROR java.lang.RuntimeException: 'ReceiverTypeData' missing from stdout/stderr

at TestPrintMdo.main(TestPrintMdo.java:67)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:78)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:567)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:127)
at java.base/java.lang.Thread.run(Thread.java:831)
Caused by: java.lang.RuntimeException: 'ReceiverTypeData' missing from stdout/stderr

at jdk.test.lib.process.OutputAnalyzer.shouldMatch(OutputAnalyzer.java:308)
at ClhsdbLauncher.runCmd(ClhsdbLauncher.java:163)
at ClhsdbLauncher.run(ClhsdbLauncher.java:200)
at TestPrintMdo.main(TestPrintMdo.java:63)
... 6 more

JavaTest Message: Test threw exception: java.lang.RuntimeException: Test ERROR java.lang.RuntimeException: 'ReceiverTypeData' missing from stdout/stderr