Here we get the "error reporting routines re-entered" ICE because of an unguarded use of warning_at. While at it, I added a check for a warning_at just above it.
Bootstrapped/regtested on x86_64-pc-linux-gnu, ok for trunk? PR c++/110175 gcc/cp/ChangeLog: * typeck.cc (cp_build_unary_op): Check tf_warning before warning. gcc/testsuite/ChangeLog: * g++.dg/cpp0x/decltype-110175.C: New test. --- gcc/cp/typeck.cc | 5 +++-- gcc/testsuite/g++.dg/cpp0x/decltype-110175.C | 6 ++++++ 2 files changed, 9 insertions(+), 2 deletions(-) create mode 100644 gcc/testsuite/g++.dg/cpp0x/decltype-110175.C diff --git a/gcc/cp/typeck.cc b/gcc/cp/typeck.cc index da591dafc8f..859b133a18d 100644 --- a/gcc/cp/typeck.cc +++ b/gcc/cp/typeck.cc @@ -7561,7 +7561,8 @@ cp_build_unary_op (enum tree_code code, tree xarg, bool noconvert, /* [depr.volatile.type] "Postfix ++ and -- expressions and prefix ++ and -- expressions of volatile-qualified arithmetic and pointer types are deprecated." */ - if (TREE_THIS_VOLATILE (arg) || CP_TYPE_VOLATILE_P (TREE_TYPE (arg))) + if ((TREE_THIS_VOLATILE (arg) || CP_TYPE_VOLATILE_P (TREE_TYPE (arg))) + && (complain & tf_warning)) warning_at (location, OPT_Wvolatile, "%qs expression of %<volatile%>-qualified type is " "deprecated", @@ -7592,7 +7593,7 @@ cp_build_unary_op (enum tree_code code, tree xarg, bool noconvert, return error_mark_node; } /* Otherwise, [depr.incr.bool] says this is deprecated. */ - else + else if (complain & tf_warning) warning_at (location, OPT_Wdeprecated, "use of an operand of type %qT " "in %<operator++%> is deprecated", diff --git a/gcc/testsuite/g++.dg/cpp0x/decltype-110175.C b/gcc/testsuite/g++.dg/cpp0x/decltype-110175.C new file mode 100644 index 00000000000..39643cafcf8 --- /dev/null +++ b/gcc/testsuite/g++.dg/cpp0x/decltype-110175.C @@ -0,0 +1,6 @@ +// PR c++/110175 +// { dg-do compile { target c++11 } } + +template<class T> auto f(T t) -> decltype(++t) { return t; } // { dg-warning "reference" "" { target c++14_down } } +void f(...) {} +void g() { f(true); } base-commit: 5388a43f6a3f348929292998bd6d0c1da6f006de -- 2.41.0