Fixed by r11-2998, which fixed this ICE too.
Tested x86_64-pc-linux-gnu, applying to trunk.
PR c++/90199
* g++.dg/cpp1y/constexpr-90199.C: New test.
---
gcc/testsuite/g++.dg/cpp1y/constexpr-90199.C | 28 ++++++++++++++++++++
1 file changed, 28 insertions(+)
create mode 100644 gcc/testsuite/g++.dg/cpp1y/constexpr-90199.C
diff --git a/gcc/testsuite/g++.dg/cpp1y/constexpr-90199.C
b/gcc/testsuite/g++.dg/cpp1y/constexpr-90199.C
new file mode 100644
index 00000000000..0e3f2be08d3
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp1y/constexpr-90199.C
@@ -0,0 +1,28 @@
+// PR c++/90199
+// { dg-do compile { target c++14 } }
+// { dg-additional-options "-frounding-math" }
+
+template <typename>
+class complex;
+
+template <typename D7> constexpr complex<D7>
+operator+ (complex<D7> hd, complex<D7> qc)
+{
+ hd += qc;
+ return hd;
+}
+
+template <>
+class complex<float> {
+public:
+ constexpr complex
+ operator+= (complex rm)
+ {
+ jp += rm.jp;
+ return *this;
+ }
+
+ _Complex float jp;
+};
+
+constexpr complex<float> fl{3.3}, ka{1.1}, r0 = fl + ka;
base-commit: 9044db88d634c631920eaa9f66c0275adf18fdf5
--
2.26.2
