From 6bbc77a69cba4b17af0f4f8a6652f8e90beecdba Mon Sep 17 00:00:00 2001
From: Christoffer Lerno <christoffer@aegik.com>
Date: Sun, 6 Oct 2024 12:19:06 +0200
Subject: [PATCH] Segfault with passing a program with `-` using stdin. Using
 no module with `-` would reject the program. #1523

---
 releasenotes.md        | 2 ++
 src/compiler/context.c | 6 ++++++
 src/compiler/parser.c  | 1 +
 3 files changed, 9 insertions(+)

diff --git a/releasenotes.md b/releasenotes.md
index f679ed46e..124c21281 100644
--- a/releasenotes.md
+++ b/releasenotes.md
@@ -12,6 +12,8 @@
 - `Unsupported int[*] $x = { 1, 2, 3, 4 }` #1489.
 - Unexpected compile error using a typed constant with `copysign` #1517
 - Incorrect subscript resolution #1519.
+- Segfault with passing a program with `-` using stdin.
+- Using no module with `-` would reject the program.
 
 ### Stdlib changes
 - Remove unintended print of `char[]` as String
diff --git a/src/compiler/context.c b/src/compiler/context.c
index 22e289da1..b427d55f9 100644
--- a/src/compiler/context.c
+++ b/src/compiler/context.c
@@ -46,6 +46,12 @@ static inline bool create_module_or_check_name(CompilationUnit *unit, Path *modu
 
 static bool filename_to_module_in_buffer(const char *path)
 {
+	if (str_eq("<stdin>", path))
+	{
+		scratch_buffer_clear();
+		scratch_buffer_append("stdin_file");
+		return true;
+	}
 	int len = (int)strlen(path);
 	int last_slash = 0;
 	int last_dot = -1;
diff --git a/src/compiler/parser.c b/src/compiler/parser.c
index 635c8c693..79e73d83d 100644
--- a/src/compiler/parser.c
+++ b/src/compiler/parser.c
@@ -177,6 +177,7 @@ bool parse_stdin(void)
 			.name = "stdin",
 			.file_id = STDIN_FILE_ID,
 			.full_path = "<stdin>",
+			.dir_path = "",
 	};
 #define BUF_SIZE 65536
 	char buffer[BUF_SIZE];