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-rw-r--r--gcc/testsuite/gfortran.dg/pr117820.f9010
-rw-r--r--libgfortran/io/write.c4
2 files changed, 14 insertions, 0 deletions
diff --git a/gcc/testsuite/gfortran.dg/pr117820.f90 b/gcc/testsuite/gfortran.dg/pr117820.f90
new file mode 100644
index 0000000..59a4b36
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/pr117820.f90
@@ -0,0 +1,10 @@
+! { dg-do run }
+! See pr117820, original testcase provided by Malcolm Cohen.
+program test
+ integer(8) :: x
+ character(80) :: output
+ output = "garbage"
+ x = ibset (0_8, 63)
+ write(output, '("<",B64.0,">")') x
+ if (output .ne. "<1000000000000000000000000000000000000000000000000000000000000000>") stop 1
+end program
diff --git a/libgfortran/io/write.c b/libgfortran/io/write.c
index 2f414c6..ccb2b5c 100644
--- a/libgfortran/io/write.c
+++ b/libgfortran/io/write.c
@@ -1392,6 +1392,10 @@ write_b (st_parameter_dt *dtp, const fnode *f, const char *source, int len)
{
n = extract_uint (source, len);
p = btoa (n, itoa_buf, sizeof (itoa_buf));
+
+ /* Test for zero. Needed by write_boz. */
+ if (n != 0)
+ n = 1;
write_boz (dtp, f, p, n, len);
}
}