commit 9a00d9a13e6d3f8d1d36b5ec4c0c4cf41172af00
Author: Pavel Sanda <[email protected]>
Date:   Tue Aug 18 02:37:44 2026 +0200

    Fix #13350 - Font changes should not be allowed for passthru.
    
    Backporting eae3cfd.
    
    Assisted-by: Claude Opus 4.8
---
 src/Text.cpp | 9 ++++++++-
 status.25x   | 4 ++++
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/src/Text.cpp b/src/Text.cpp
index f710b753ff..a262821350 100644
--- a/src/Text.cpp
+++ b/src/Text.cpp
@@ -2807,6 +2807,13 @@ void Text::setFont(BufferView const & bv, CursorSlice 
const & begin,
                        continue;
                pit_type const pit = dit.pit();
                pos_type const pos = dit.pos();
+               // Do not apply font changes to passthru (e.g. Verbatim)
+               // paragraphs: they would be output as literal LaTeX code
+               // (\textcolor{...}{...} etc.) rather than rendered (bug 13350).
+               // Checking per position also covers a selection that spans
+               // both passthru and normal paragraphs.
+               if (pars_[pit].isPassThru())
+                       continue;
                Inset * inset = pars_[pit].getInset(pos);
                if (inset && inset->resetFontEdit()) {
                        // We need to propagate the font change to all
@@ -7121,7 +7128,7 @@ bool Text::getStatus(Cursor & cur, FuncRequest const & 
cmd,
        }
 
        case LFUN_TEXTSTYLE_APPLY:
-               enable = !freeFonts.empty();
+               enable = !freeFonts.empty() && !cur.paragraph().isPassThru();
                break;
 
        case LFUN_WORD_DELETE_FORWARD:
diff --git a/status.25x b/status.25x
index 40f865a1b4..184ba9a63c 100644
--- a/status.25x
+++ b/status.25x
@@ -29,6 +29,10 @@ What's new
 
 - Fix autoselect filter on Citation dialog (bug #13333).
 
+- Font changes should not be allowed for passthru environment
+  (e.g. verbatim). Fixes bug #13350.
+
+
 * DOCUMENTATION AND LOCALIZATION
 
 
-- 
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