Fortran: Fix runtime bogus diagnostic with ';'

	PR libfortran/121234

libgfortran/ChangeLog:

	* io/list_read.c (read_character): Add checks to bypass eating
	semicolons when reading strings with decimal mode 'point'
	(list_formatted_read_scalar): Likewise.

gcc/testsuite/ChangeLog:

	* gfortran.dg/pr121234.f90: New test.

1 files changed, 28 insertions, 0 deletions

diff --git a/gcc/testsuite/gfortran.dg/pr121234.f90 b/gcc/testsuite/gfortran.dg/pr121234.f90
new file mode 100644
index 0000000..8eb1af53
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/pr121234.f90
@@ -0,0 +1,28 @@
+! { dg-do run }
+! PR121234 Bogus diagnostic on READ of string with semicolon.
+  character(12) buffer,a
+  a = 'xxxxxxxxxx'
+  buffer="33;44"
+  read(buffer,*) a
+  if (a .ne. "33;44") stop 1
+  a = 'xxxxxxxxxx'
+  buffer="  ;;33 ,44 "
+  read(buffer,*,decimal="comma") a
+  if (a .ne. 'xxxxxxxxxx') stop 2 ! A null read
+  a = 'xxxxxxxxxx'
+  buffer="  ;;33 ,44 "
+  read(buffer,*,decimal="point") a
+  if (a .ne. ';;33') stop 3 ! Spaces are delimiting
+  a = 'xxxxxxxxxx'
+  buffer=";;33;,44 "
+  read(buffer,*) a
+  if (a .ne. ';;33;') stop 4 ! Comma is delimiting
+  a = 'xxxxxxxxxx'
+  buffer=";;33;44;; "
+  read(buffer,*) a
+  if (a .ne. ';;33;44;;') stop 5 ! Space is delimiting
+  a = 'xxxxxxxxxx'
+  buffer=";;33;44;;;.7"
+  read(buffer,*) a
+  if (a .ne. ';;33;44;;;.7') stop 6 ! Space is delimiting
+end