c++/6949: ICE in tsubst_decl, at cp/pt.c:5733
rubin@contractor.net
rubin@contractor.net
Thu Jun 6 13:36:00 GMT 2002
>Number: 6949
>Category: c++
>Synopsis: ICE in tsubst_decl, at cp/pt.c:5733
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: unassigned
>State: open
>Class: ice-on-legal-code
>Submitter-Id: net
>Arrival-Date: Thu Jun 06 13:36:01 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator: Bill Rubin
>Release: 3.1
>Organization:
>Environment:
Cygwin on Windows XP Professional
>Description:
This ICE is caused by a class nested inside a local class of a templated member function. The code snippet below is illustrative of the ICE in my application. I found that small changes in the snippet cause the ICE to disappear, or to pop up in another place. For example, just replacing
void funct();
with
void funct(){}
causes the ICE to disappear!
//========= Compiler output ================
$ gcc -v -save-temps GccBug2.cpp
Reading specs from /usr/local/lib/gcc-lib/i686-pc-cygwin/3.1/specs
Configured with: ../gcc-3.1/configure --enable-threads=win32
Thread model: win32
gcc version 3.1
// ... junk elided here ...
GNU CPP version 3.1 (cpplib) (80386, BSD syntax)
GNU C++ version 3.1 (i686-pc-cygwin)
compiled by GNU C version 3.1.
GccBug2.cpp: In instantiation of `Struct::templatedMemberFunction(const T&)
[with T = int]::LocalClass::NestedClass':
GccBug2.cpp:6: instantiated from `Struct::templatedMemberFunction(const T&)
[with T = int]::LocalClass'
GccBug2.cpp:16: instantiated from `void Struct::templatedMemberFunction
(const T&) [with T = int]'
GccBug2.cpp:23: instantiated from here
GccBug2.cpp:7: Internal compiler error in tsubst_decl, at cp/pt.c:5733
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://www.gnu.org/software/gcc/bugs.html> for instructions.
//========= Source File GccBug2.cpp Begins Here ===========
struct Struct {
template<class T> void templatedMemberFunction(const T&) {
class LocalClass {
struct NestedClass {
void funct();
};
NestedClass nestedClassInstance_;
public:
void memberFunction() {nestedClassInstance_.funct();}
};
LocalClass localClass;
localClass.memberFunction();
};
};
void globalFunction() {
Struct classInstance;
classInstance.templatedMemberFunction(42);
}
//========= Source File GccBug2.cpp Ends Here =============
>How-To-Repeat:
Invoke the compiler on GccBug2.cpp.
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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