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-rw-r--r--src/libexpr/lexer.l6
1 files changed, 6 insertions, 0 deletions
diff --git a/src/libexpr/lexer.l b/src/libexpr/lexer.l
index 8ad6a1957..51593eccd 100644
--- a/src/libexpr/lexer.l
+++ b/src/libexpr/lexer.l
@@ -28,6 +28,8 @@ using namespace nix;
namespace nix {
+// backup to recover from yyless(0)
+YYLTYPE prev_yylloc;
static void initLoc(YYLTYPE * loc)
{
@@ -38,6 +40,8 @@ static void initLoc(YYLTYPE * loc)
static void adjustLoc(YYLTYPE * loc, const char * s, size_t len)
{
+ prev_yylloc = *loc;
+
loc->first_line = loc->last_line;
loc->first_column = loc->last_column;
@@ -210,6 +214,7 @@ or { return OR_KW; }
{HPATH_START}\$\{ {
PUSH_STATE(PATH_START);
yyless(0);
+ *yylloc = prev_yylloc;
}
<PATH_START>{PATH_SEG} {
@@ -265,6 +270,7 @@ or { return OR_KW; }
context (it may be ')', ';', or something of that sort) */
POP_STATE();
yyless(0);
+ *yylloc = prev_yylloc;
return PATH_END;
}