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-rw-r--r--src/c99-flex.skl6
-rw-r--r--src/cpp-flex.skl12
-rw-r--r--src/go-flex.skl6
3 files changed, 21 insertions, 3 deletions
diff --git a/src/c99-flex.skl b/src/c99-flex.skl
index 796fe11..ca712dd 100644
--- a/src/c99-flex.skl
+++ b/src/c99-flex.skl
@@ -712,7 +712,11 @@ static void yy_init_buffer(yybuffer b, FILE * file, yyscan_t yyscanner)
yy_flush_buffer( b, yyscanner);
b->yy_input_file = file;
- b->yy_fill_buffer = true;
+ if (b->yy_input_file == NULL) {
+ b->yy_fill_buffer = false;
+ } else {
+ b->yy_fill_buffer = true;
+ }
/* If b is the current buffer, then yy_init_buffer was _probably_
* called from yyrestart() or through yy_get_next_buffer.
diff --git a/src/cpp-flex.skl b/src/cpp-flex.skl
index 5af5003..32bedfc 100644
--- a/src/cpp-flex.skl
+++ b/src/cpp-flex.skl
@@ -3060,7 +3060,17 @@ m4_ifdef([[M4_MODE_C_ONLY]], [[
m4_ifdef([[M4_MODE_CXX_ONLY]], [[
b->yy_input_file = file.rdbuf();
]])
- b->yy_fill_buffer = 1;
+
+ /* b->yy_input_file should never by NULL but we'll handle it cleanly
+ * on the off chance.
+ */
+ if (b->yy_input_file == NULL){
+ b->yy_fill_buffer = 0;
+ } else {
+ b->yy_fill_buffer = 1;
+ }
+
+
/* If b is the current buffer, then yy_init_buffer was _probably_
* called from yyrestart() or through yy_get_next_buffer.
diff --git a/src/go-flex.skl b/src/go-flex.skl
index 9597a91..e231942 100644
--- a/src/go-flex.skl
+++ b/src/go-flex.skl
@@ -621,7 +621,11 @@ static void yy_init_buffer(yybuffer b, FILE * file, FlexLexer *yyscanner)
yy_flush_buffer(b, yyscanner);
b->yyInputFile = file;
- b->yyFillBuffer = true;
+ if (b->yyInputFile == NULL) {
+ b->yyFillBuffer = false;
+ } else {
+ b->yyFillBuffer = true;
+ }
/* If b is the current buffer, then yy_init_buffer was _probably_
* called from yyrestart() or through yy_get_next_buffer.