2309 – Crash on a template mixing in a variadic template with an undefined template identifier

D issues are now tracked on GitHub. This Bugzilla instance remains as a read-only archive.

Issue 2309 - Crash on a template mixing in a variadic template with an undefined template identifier

Summary: Crash on a template mixing in a variadic template with an undefined template ...

Status:	RESOLVED FIXED
Alias:	None
Product:	D
Classification:	Unclassified
Component:	dmd (show other issues)
Version:	D1 (retired)
Hardware:	x86 Windows
Importance :	P2 major
Assignee:	Walter Bright
URL:
Keywords:	ice-on-invalid-code, patch
Depends on:
Blocks:

See Also:
Reported:	2008年08月23日 12:22 UTC by Matti Niemenmaa
Modified:	2014年03月01日 00:36 UTC (History)
CC List:	1 user (show)

Attachments
Add an attachment (proposed patch, testcase, etc.)

Note You need to log in before you can comment on or make changes to this issue.

Description Matti Niemenmaa 2008年08月23日 12:22:18 UTC

template Id(xs...) { const Id = xs[0]; }
template Foo() { mixin Id!(NONEXISTENT!()); }
alias Foo!() x;
The above gives the following before crashing DMD:
foo.d(3): template instance identifier 'NONEXISTENT' is not defined
In the following case, no error message is given before the crash, which is why I'm marking this as major:
template Id(xs...) { const Id = xs[0]; }
template Foo() { mixin Id!(NONEXISTENT!()); }
// removing the 'int' here brings the error message back
template Bar(alias F) { const int Bar = F!(); }
alias Bar!(Foo) x;

Comment 1 Don 2009年04月24日 03:30:04 UTC

Here's a patch: This one is really simple.
--------------------
Index: mangle.c
===================================================================
--- mangle.c	(revision 24)
+++ mangle.c	(working copy)
@@ -217,7 +217,7 @@
 printf("\n");
 #endif
 id = ident ? ident->toChars() : toChars();
- if (tempdecl->parent)
+ if (tempdecl && tempdecl->parent)
 {
 	char *p = tempdecl->parent->mangle();
 	if (p[0] == '_' && p[1] == 'D')

Comment 2 Don 2009年05月14日 07:28:50 UTC

Fixed DMD1.045 and 2.030