r259532 - PR23057: Fix assertion `Val && "isa<> used on a null pointer"' on invalid for-range expression.
Denis Zobnin via cfe-commits
cfe-commits at lists.llvm.org
Tue Feb 2 09:33:09 PST 2016
Author: dzobnin
Date: Tue Feb 2 11:33:09 2016
New Revision: 259532
URL: http://llvm.org/viewvc/llvm-project?rev=259532&view=rev
Log:
PR23057: Fix assertion `Val && "isa<> used on a null pointer"' on invalid for-range expression.
Fix the issue discovered by fuzzing (PR23057, comment 18) by handling nullptr in Sema::ActOnCXXForRangeDecl
and correct delayed typos in for-range expression before calling Sema::ActOnCXXForRangeStmt. Also fixes PR26288.
Differential Revision: http://reviews.llvm.org/D16630
Added:
cfe/trunk/test/Parser/cxx-invalid-for-range.cpp
Modified:
cfe/trunk/lib/Parse/ParseStmt.cpp
cfe/trunk/lib/Sema/SemaDecl.cpp
cfe/trunk/test/CXX/dcl.dcl/dcl.spec/dcl.type/p3-0x.cpp
Modified: cfe/trunk/lib/Parse/ParseStmt.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Parse/ParseStmt.cpp?rev=259532&r1=259531&r2=259532&view=diff
==============================================================================
--- cfe/trunk/lib/Parse/ParseStmt.cpp (original)
+++ cfe/trunk/lib/Parse/ParseStmt.cpp Tue Feb 2 11:33:09 2016
@@ -1716,9 +1716,11 @@ StmtResult Parser::ParseForStatement(Sou
StmtResult ForEachStmt;
if (ForRange) {
+ ExprResult CorrectedRange =
+ Actions.CorrectDelayedTyposInExpr(ForRangeInit.RangeExpr.get());
ForRangeStmt = Actions.ActOnCXXForRangeStmt(
getCurScope(), ForLoc, CoawaitLoc, FirstPart.get(),
- ForRangeInit.ColonLoc, ForRangeInit.RangeExpr.get(),
+ ForRangeInit.ColonLoc, CorrectedRange.get(),
T.getCloseLocation(), Sema::BFRK_Build);
// Similarly, we need to do the semantic analysis for a for-range
Modified: cfe/trunk/lib/Sema/SemaDecl.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaDecl.cpp?rev=259532&r1=259531&r2=259532&view=diff
==============================================================================
--- cfe/trunk/lib/Sema/SemaDecl.cpp (original)
+++ cfe/trunk/lib/Sema/SemaDecl.cpp Tue Feb 2 11:33:09 2016
@@ -9928,6 +9928,10 @@ void Sema::ActOnUninitializedDecl(Decl *
}
void Sema::ActOnCXXForRangeDecl(Decl *D) {
+ // If there is no declaration, there was an error parsing it. Ignore it.
+ if (!D)
+ return;
+
VarDecl *VD = dyn_cast<VarDecl>(D);
if (!VD) {
Diag(D->getLocation(), diag::err_for_range_decl_must_be_var);
Modified: cfe/trunk/test/CXX/dcl.dcl/dcl.spec/dcl.type/p3-0x.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CXX/dcl.dcl/dcl.spec/dcl.type/p3-0x.cpp?rev=259532&r1=259531&r2=259532&view=diff
==============================================================================
--- cfe/trunk/test/CXX/dcl.dcl/dcl.spec/dcl.type/p3-0x.cpp (original)
+++ cfe/trunk/test/CXX/dcl.dcl/dcl.spec/dcl.type/p3-0x.cpp Tue Feb 2 11:33:09 2016
@@ -18,6 +18,9 @@ void f() {
for (struct S { S(int) {} } s : arr) { // expected-error {{types may not be defined in a for range declaration}}
}
+ for (struct S { S(int) {} } s : Undeclared); // expected-error{{types may not be defined in a for range declaration}}
+ // expected-error at -1{{use of undeclared identifier 'Undeclared'}}
+
new struct T {}; // expected-error {{'T' cannot be defined in a type specifier}}
new struct A {}; // expected-error {{'A' cannot be defined in a type specifier}}
Added: cfe/trunk/test/Parser/cxx-invalid-for-range.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Parser/cxx-invalid-for-range.cpp?rev=259532&view=auto
==============================================================================
--- cfe/trunk/test/Parser/cxx-invalid-for-range.cpp (added)
+++ cfe/trunk/test/Parser/cxx-invalid-for-range.cpp Tue Feb 2 11:33:09 2016
@@ -0,0 +1,18 @@
+// RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
+
+// From PR23057 comment #18 (https://llvm.org/bugs/show_bug.cgi?id=23057#c18).
+
+namespace N {
+ int X[10]; // expected-note{{declared here}}}}
+}
+
+void f1() {
+ for (auto operator new : X); // expected-error{{'operator new' cannot be the name of a variable or data member}}
+ // expected-error at -1{{use of undeclared identifier 'X'; did you mean 'N::X'?}}
+}
+
+void f2() {
+ for (a operator== :) // expected-error{{'operator==' cannot be the name of a variable or data member}}
+ // expected-error at -1{{expected expression}}
+ // expected-error at -2{{unknown type name 'a'}}
+} // expected-error{{expected statement}}
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