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-rw-r--r--src/AstGen.zig1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/AstGen.zig b/src/AstGen.zig
index f49d5de6e3..496bcd933d 100644
--- a/src/AstGen.zig
+++ b/src/AstGen.zig
@@ -10566,6 +10566,7 @@ fn advanceSourceCursor(astgen: *AstGen, source: []const u8, end: usize) void {
var i = astgen.source_offset;
var line = astgen.source_line;
var column = astgen.source_column;
+ assert(i <= end);
while (i < end) : (i += 1) {
if (source[i] == '\n') {
line += 1;