From a41bbf6901532d7bb1bac8b74e1e0ba4290a252b Mon Sep 17 00:00:00 2001
From: ringabout <43030857+ringabout@users.noreply.github.com>
Date: Fri, 26 Dec 2025 04:02:54 +0800
Subject: [PATCH] fixes #25387; `embedsrc` breaks with Line Continuation
 (#25388)

fixes #25387


https://stackoverflow.com/questions/30286253/how-to-escape-backslash-in-comment

- adding a whitespace or `\t` after `\` breaks the `goto` block
- `\* *\` doesn't support nesting, causing problems for using it in the
Nim comments
---
 compiler/cgen.nim        | 5 ++++-
 tests/ccgbugs/t25387.nim | 8 ++++++++
 2 files changed, 12 insertions(+), 1 deletion(-)
 create mode 100644 tests/ccgbugs/t25387.nim

diff --git a/compiler/cgen.nim b/compiler/cgen.nim
index c271cbda31..48bf1ad6e3 100644
--- a/compiler/cgen.nim
+++ b/compiler/cgen.nim
@@ -337,7 +337,10 @@ proc genLineDir(p: BProc, t: PNode) =
   let line = t.info.safeLineNm
 
   if optEmbedOrigSrc in p.config.globalOptions:
-    p.s(cpsStmts).add("//" & sourceLine(p.config, t.info) & "\L")
+    var code = sourceLine(p.config, t.info)
+    if code.endsWith('\\'):
+      code.add "#"
+    p.s(cpsStmts).add("// " & code & "\L")
   let lastFileIndex = p.lastLineInfo.fileIndex
   let freshLine = freshLineInfo(p, t.info)
   if freshLine:
diff --git a/tests/ccgbugs/t25387.nim b/tests/ccgbugs/t25387.nim
new file mode 100644
index 0000000000..d694e3351d
--- /dev/null
+++ b/tests/ccgbugs/t25387.nim
@@ -0,0 +1,8 @@
+discard """
+  matrix: "--embedsrc=on"
+"""
+
+proc trim() =
+  let s = 10
+  let x = s + 5 # user entered literal \
+trim()
\ No newline at end of file