diff --git a/gcc/fortran/arith.cc b/gcc/fortran/arith.cc
index 086b1f856b1..9e079e42995 100644
--- a/gcc/fortran/arith.cc
+++ b/gcc/fortran/arith.cc
@@ -2040,6 +2040,9 @@ gfc_int2int (gfc_expr *src, int kind)
   gfc_expr *result;
   arith rc;
 
+  if (src->ts.type != BT_INTEGER)
+    return NULL;
+
   result = gfc_get_constant_expr (BT_INTEGER, kind, &src->where);
 
   mpz_set (result->value.integer, src->value.integer);
@@ -2085,6 +2088,9 @@ gfc_int2real (gfc_expr *src, int kind)
   gfc_expr *result;
   arith rc;
 
+  if (src->ts.type != BT_INTEGER)
+    return NULL;
+
   result = gfc_get_constant_expr (BT_REAL, kind, &src->where);
 
   mpfr_set_z (result->value.real, src->value.integer, GFC_RND_MODE);
@@ -2116,6 +2122,9 @@ gfc_int2complex (gfc_expr *src, int kind)
   gfc_expr *result;
   arith rc;
 
+  if (src->ts.type != BT_INTEGER)
+    return NULL;
+
   result = gfc_get_constant_expr (BT_COMPLEX, kind, &src->where);
 
   mpc_set_z (result->value.complex, src->value.integer, GFC_MPC_RND_MODE);
@@ -2150,6 +2159,9 @@ gfc_real2int (gfc_expr *src, int kind)
   arith rc;
   bool did_warn = false;
 
+  if (src->ts.type != BT_REAL)
+    return NULL;
+
   result = gfc_get_constant_expr (BT_INTEGER, kind, &src->where);
 
   gfc_mpfr_to_mpz (result->value.integer, src->value.real, &src->where);
@@ -2196,6 +2208,9 @@ gfc_real2real (gfc_expr *src, int kind)
   arith rc;
   bool did_warn = false;
 
+  if (src->ts.type != BT_REAL)
+    return NULL;
+
   result = gfc_get_constant_expr (BT_REAL, kind, &src->where);
 
   mpfr_set (result->value.real, src->value.real, GFC_RND_MODE);
@@ -2310,6 +2325,9 @@ gfc_complex2int (gfc_expr *src, int kind)
   arith rc;
   bool did_warn = false;
 
+  if (src->ts.type != BT_COMPLEX)
+    return NULL;
+
   result = gfc_get_constant_expr (BT_INTEGER, kind, &src->where);
 
   gfc_mpfr_to_mpz (result->value.integer, mpc_realref (src->value.complex),
@@ -2372,6 +2390,9 @@ gfc_complex2real (gfc_expr *src, int kind)
   arith rc;
   bool did_warn = false;
 
+  if (src->ts.type != BT_COMPLEX)
+    return NULL;
+
   result = gfc_get_constant_expr (BT_REAL, kind, &src->where);
 
   mpc_real (result->value.real, src->value.complex, GFC_RND_MODE);
@@ -2439,6 +2460,9 @@ gfc_complex2complex (gfc_expr *src, int kind)
   arith rc;
   bool did_warn = false;
 
+  if (src->ts.type != BT_COMPLEX)
+    return NULL;
+
   result = gfc_get_constant_expr (BT_COMPLEX, kind, &src->where);
 
   mpc_set (result->value.complex, src->value.complex, GFC_MPC_RND_MODE);
@@ -2504,6 +2528,9 @@ gfc_log2log (gfc_expr *src, int kind)
 {
   gfc_expr *result;
 
+  if (src->ts.type != BT_LOGICAL)
+    return NULL;
+
   result = gfc_get_constant_expr (BT_LOGICAL, kind, &src->where);
   result->value.logical = src->value.logical;
 
@@ -2518,6 +2545,9 @@ gfc_log2int (gfc_expr *src, int kind)
 {
   gfc_expr *result;
 
+  if (src->ts.type != BT_LOGICAL)
+    return NULL;
+
   result = gfc_get_constant_expr (BT_INTEGER, kind, &src->where);
   mpz_set_si (result->value.integer, src->value.logical);
 
@@ -2532,6 +2562,9 @@ gfc_int2log (gfc_expr *src, int kind)
 {
   gfc_expr *result;
 
+  if (src->ts.type != BT_INTEGER)
+    return NULL;
+
   result = gfc_get_constant_expr (BT_LOGICAL, kind, &src->where);
   result->value.logical = (mpz_cmp_si (src->value.integer, 0) != 0);
 
diff --git a/gcc/testsuite/gfortran.dg/pr107215.f90 b/gcc/testsuite/gfortran.dg/pr107215.f90
new file mode 100644
index 00000000000..2c2a0ca7502
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/pr107215.f90
@@ -0,0 +1,17 @@
+! { dg-do compile }
+! PR fortran/107215 - ICE in gfc_real2real and gfc_complex2complex
+! Contributed by G.Steinmetz
+
+program p
+  double precision, parameter :: z = 1.0d0
+  complex :: x(1)
+  real    :: y(1)
+  x = [real :: -'1'] * z      ! { dg-error "Operand of unary numeric operator" }
+  y = z * [real :: -'1']      ! { dg-error "Operand of unary numeric operator" }
+  x = [real :: -(.true.)] * z ! { dg-error "Operand of unary numeric operator" }
+  y = z * [real :: -(.true.)] ! { dg-error "Operand of unary numeric operator" }
+  x = [complex :: -'1'] * z   ! { dg-error "Operand of unary numeric operator" }
+  y = z * [complex :: -'1']   ! { dg-error "Operand of unary numeric operator" }
+  x = [complex :: -(.true.)] * z ! { dg-error "Operand of unary numeric operator" }
+  y = z * [complex :: -(.true.)] ! { dg-error "Operand of unary numeric operator" }
+end