re PR c++/84455 (ICE in build_call_a at gcc/cp/call.c:389 during error reporting)

	PR c++/84455
	* pt.c (tsubst_lambda_expr): If not nested, increment temporarily
	function_depth to avoid GC during finish_lambda_function.

	* g++.dg/cpp0x/lambda/lambda-ice26.C: New test.

From-SVN: r257838

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index 000e72f..726c095 100644 (file)
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,9 @@
+2018-02-20  Jakub Jelinek  <jakub@redhat.com>
+
+       PR c++/84455
+       * pt.c (tsubst_lambda_expr): If not nested, increment temporarily
+       function_depth to avoid GC during finish_lambda_function.
+
 2018-02-19  Jason Merrill  <jason@redhat.com>
 
        PR c++/84429 - ICE capturing VLA.

diff --git a/gcc/cp/pt.c b/gcc/cp/pt.c
index 8979071..bc03f0e 100644 (file)
--- a/gcc/cp/pt.c
+++ b/gcc/cp/pt.c
@@ -17070,6 +17070,10 @@ tsubst_lambda_expr (tree t, tree args, tsubst_flags_t complain, tree in_decl)
       bool nested = cfun;
       if (nested)
        push_function_context ();
+      else
+       /* Still increment function_depth so that we don't GC in the
+          middle of an expression.  */
+       ++function_depth;
 
       local_specialization_stack s (lss_copy);
 
@@ -17084,6 +17088,8 @@ tsubst_lambda_expr (tree t, tree args, tsubst_flags_t complain, tree in_decl)
 
       if (nested)
        pop_function_context ();
+      else
+       --function_depth;
 
       /* The capture list was built up in reverse order; fix that now.  */
       LAMBDA_EXPR_CAPTURE_LIST (r)

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 531d29a..9c1391e 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2018-02-20  Jakub Jelinek  <jakub@redhat.com>
+
+       PR c++/84455
+       * g++.dg/cpp0x/lambda/lambda-ice26.C: New test.
+
 2018-02-19  Paul Thomas  <pault@gcc.gnu.org>
 
        PR fortran/83344

diff --git a/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-ice26.C b/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-ice26.C
new file mode 100644 (file)
index 0000000..7544b27
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-ice26.C
@@ -0,0 +1,5 @@
+// PR c++/84455
+// { dg-do compile { target c++11 } }
+// { dg-options "--param ggc-min-heapsize=0" }
+
+#include "lambda-ice14.C"