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Bug
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Resolution: Fixed
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P2
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9, 10, 11
Issue | Fix Version | Assignee | Priority | Status | Resolution | Resolved In Build |
---|---|---|---|---|---|---|
JDK-8204820 | 11.0.1 | Vicente Arturo Romero Zaldivar | P2 | Resolved | Fixed | team |
JDK-8205546 | 10u-cpu | Vicente Arturo Romero Zaldivar | P2 | Resolved | Fixed | master |
JDK-8204992 | 10.0.2 | Vicente Arturo Romero Zaldivar | P2 | Closed | Fixed | b10 |
JDK-8204873 | 10u-open | Vicente Arturo Romero Zaldivar | P2 | Resolved | Fixed | master |
ADDITIONAL SYSTEM INFORMATION :
OS: Windows, Unix
Java: all versions of Java 9+
A DESCRIPTION OF THE PROBLEM :
When using the += operator, it seems that javac duplicates the code before the +=.
Example:
array[i++%n] += i + " ";
This code is compiled as if it were:
array[i++%n] = array[i++%n] + i + " ";
REGRESSION : Last worked in version 8u172
STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Run and execute the source code for the executable test
EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
1 4 7 10 13 16 19 22 25 28 31 34 37 40 43 46 49 52 55 58 61 64 67 70 73 76 79 82 85 88 91 94 97 100
2 5 8 11 14 17 20 23 26 29 32 35 38 41 44 47 50 53 56 59 62 65 68 71 74 77 80 83 86 89 92 95 98 101
3 6 9 12 15 18 21 24 27 30 33 36 39 42 45 48 51 54 57 60 63 66 69 72 75 78 81 84 87 90 93 96 99
ACTUAL -
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94 96 98
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94 96 98 100 102
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94 96 98 100
---------- BEGIN SOURCE ----------
import java.util.*;
public class Main {
public static void main(String[] args) {
int size = 3;
String[] array = new String[size];
Arrays.fill(array, "");
for(int i = 0; i <= 100; ) {
System.out.println(i);
array[i++%size] += i + " ";
}
for(String element: array) {
System.out.println(element);
}
}
}
---------- END SOURCE ----------
CUSTOMER SUBMITTED WORKAROUND :
None found.
FREQUENCY : always
OS: Windows, Unix
Java: all versions of Java 9+
A DESCRIPTION OF THE PROBLEM :
When using the += operator, it seems that javac duplicates the code before the +=.
Example:
array[i++%n] += i + " ";
This code is compiled as if it were:
array[i++%n] = array[i++%n] + i + " ";
REGRESSION : Last worked in version 8u172
STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Run and execute the source code for the executable test
EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
1 4 7 10 13 16 19 22 25 28 31 34 37 40 43 46 49 52 55 58 61 64 67 70 73 76 79 82 85 88 91 94 97 100
2 5 8 11 14 17 20 23 26 29 32 35 38 41 44 47 50 53 56 59 62 65 68 71 74 77 80 83 86 89 92 95 98 101
3 6 9 12 15 18 21 24 27 30 33 36 39 42 45 48 51 54 57 60 63 66 69 72 75 78 81 84 87 90 93 96 99
ACTUAL -
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94 96 98
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94 96 98 100 102
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94 96 98 100
---------- BEGIN SOURCE ----------
import java.util.*;
public class Main {
public static void main(String[] args) {
int size = 3;
String[] array = new String[size];
Arrays.fill(array, "");
for(int i = 0; i <= 100; ) {
System.out.println(i);
array[i++%size] += i + " ";
}
for(String element: array) {
System.out.println(element);
}
}
}
---------- END SOURCE ----------
CUSTOMER SUBMITTED WORKAROUND :
None found.
FREQUENCY : always
- backported by
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JDK-8204820 "+=" applied to String operands can provoke side effects
-
- Resolved
-
-
JDK-8204873 "+=" applied to String operands can provoke side effects
-
- Resolved
-
-
JDK-8205546 "+=" applied to String operands can provoke side effects
-
- Resolved
-
-
JDK-8204992 "+=" applied to String operands can provoke side effects
-
- Closed
-
- relates to
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JDK-8148483 JEP 280 Integration
-
- Closed
-