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-rw-r--r--src/libutil/error.hh6
-rw-r--r--src/libutil/tests/logging.cc18
2 files changed, 23 insertions, 1 deletions
diff --git a/src/libutil/error.hh b/src/libutil/error.hh
index 1e6102ce1..6982e30aa 100644
--- a/src/libutil/error.hh
+++ b/src/libutil/error.hh
@@ -67,7 +67,11 @@ struct ErrPos {
{
line = pos.line;
column = pos.column;
- file = pos.file;
+ // is file symbol null?
+ if (pos.file.set())
+ file = pos.file;
+ else
+ file = "";
return *this;
}
diff --git a/src/libutil/tests/logging.cc b/src/libutil/tests/logging.cc
index 6a6fb4ac3..6a58b9425 100644
--- a/src/libutil/tests/logging.cc
+++ b/src/libutil/tests/logging.cc
@@ -289,4 +289,22 @@ namespace nix {
"what about this " ANSI_YELLOW "%3%" ANSI_NORMAL " " ANSI_YELLOW "one" ANSI_NORMAL);
}
+
+ /* ----------------------------------------------------------------------------
+ * ErrPos
+ * --------------------------------------------------------------------------*/
+
+ TEST(errpos, invalidPos) {
+
+ // contains an invalid symbol, which we should not dereference!
+ Pos invalid;
+
+ // constructing without access violation.
+ ErrPos ep(invalid);
+
+ // assignment without access violation.
+ ep = invalid;
+
+ }
+
}