From: Steven G. Kargl <kargl@gcc.gnu.org>
Date: Thu, 10 May 2018 22:45:38 +0000 (+0000)
Subject: re PR fortran/85521 (ICE in gfc_resolve_character_array_constructor, at fortran/array... 
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=14ee7de064f757c7677b906010f7e67e702b62c7;p=gcc.git

re PR fortran/85521 (ICE in gfc_resolve_character_array_constructor, at fortran/array.c:2049)

2018-05-10  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/85521
	* array.c (gfc_resolve_character_array_constructor): Substrings
	with upper bound smaller than lower bound are zero length strings.

2018-05-10  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/85521
	* gfortran.dg/pr85521_1.f90: New test.
	* gfortran.dg/pr85521_2.f90: New test.

From-SVN: r260139
---

diff --git a/gcc/fortran/ChangeLog b/gcc/fortran/ChangeLog
index aedcb2d9608..09d015c12ba 100644
--- a/gcc/fortran/ChangeLog
+++ b/gcc/fortran/ChangeLog
@@ -1,3 +1,9 @@
+2018-05-10  Steven G. Kargl  <kargl@gcc.gnu.org>
+
+	PR fortran/85521
+	* array.c (gfc_resolve_character_array_constructor): Substrings
+	with upper bound smaller than lower bound are zero length strings.
+
 2018-05-10  Steven G. Kargl  <kargl@gcc.gnu.org>
 
 	PR fortran/70870
diff --git a/gcc/fortran/array.c b/gcc/fortran/array.c
index 58d611ba4f5..052775f0baf 100644
--- a/gcc/fortran/array.c
+++ b/gcc/fortran/array.c
@@ -2046,7 +2046,8 @@ got_charlen:
 	  else
 	    return true;
 
-	  gcc_assert (current_length != -1);
+	  if (current_length < 0)
+	    current_length = 0;
 
 	  if (found_length == -1)
 	    found_length = current_length;
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 64014c48585..73f74e08401 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,9 @@
+2018-05-10  Steven G. Kargl  <kargl@gcc.gnu.org>
+
+	PR fortran/85521
+	* gfortran.dg/pr85521_1.f90: New test.
+	* gfortran.dg/pr85521_2.f90: New test.
+
 2018-05-10  Steven G. Kargl  <kargl@gcc.gnu.org>
 
 	PR fortran/70870
diff --git a/gcc/testsuite/gfortran.dg/pr85521_1.f90 b/gcc/testsuite/gfortran.dg/pr85521_1.f90
new file mode 100644
index 00000000000..57e4620fe0d
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/pr85521_1.f90
@@ -0,0 +1,8 @@
+! { dg-do compile }
+! PR fortran/85521
+program p
+   character(3) :: c = 'abc'
+   character(3) :: z(1)
+   z = [ c(:-1) ]
+   print *, z
+end
diff --git a/gcc/testsuite/gfortran.dg/pr85521_2.f90 b/gcc/testsuite/gfortran.dg/pr85521_2.f90
new file mode 100644
index 00000000000..737b61a11b9
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/pr85521_2.f90
@@ -0,0 +1,8 @@
+! { dg-do compile }
+! PR fortran/85521
+program p
+   character(3) :: c = 'abc'
+   character(3) :: z(1)
+   z = [ c(:-2) ]
+   print *, z
+end