** Description changed:
- Summary:
+ [ Impact ]
- * GDB 10.0 introduced a regression where it cannot inspect any global
variables in any D programs compiled by any D compiler.
- * LDC2 and GDC upstream stated Focal does not have such a problem and stuck
to this release for their test images.
+ * GDB 10.0 introduced a regression where it cannot inspect any global
variables in any D programs compiled by any D compiler.
+ * LDC2 and GDC upstream stated Focal does not have such a problem and stuck
to this release for their test images.
- Reproduce steps:
+ [ Test Plan ]
Considering the following D program:
```
module t;
class uv {
- int i;
+ int i;
}
__gshared uv i;
int main() {
- i = new uv();
- return 0; // #break
+ i = new uv();
+ return 0; // #break
}
```
If you build it using `gdc -g -O0 t.d -o t` or `ldc2 -o t.o t.d -g`, run
the GDB using the following commands ...
```
b t.d:10
p t.i
```
... you will notice GDB will complain that "'t.i' has unknown type; cast
it to its declared type."
+
+ [ Where problems could occur ]
+
+ * The fix consists of a single line change to the demangler. The worst-case
scenario would be breaking the demangling functionality of other programming
languages. However, the newer D ABI uses a symbol mangling scheme that is very
difficult to confuse with other programming languages.
+ * Incorrect symbol de-mangling may also cause user confusion. However, the
patch fixed a fundamental usability issue.
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https://bugs.launchpad.net/bugs/2059856
Title:
gdb 10.0 fails to examine any global variables in D programs
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